HOW TO: 400-HP SBF POWER COMBOS

302, 347, 351W, SUPERCHARGED AND BOSS 302. IT'S ALL HERE! IF YOU WANT TO KNOW HOW TO MAKE 400 HP FROM YOUR 5.0L OR OTHER SBF COMBO, CHECK OUT THIS VIDEO. SINCE VARIETY IS THE SPICE OF LIFE, I PUT TOGETHER THIS VIDEO USING A VARIETY OF DIFFERENT SBF POWER COMBINATIONS TO ALL EXCEED 400 HP. 306, 347, 351, BOOSTED 302 & EVEN A MODIFIED, 4V BOSS 302!

[@superduty4556]

And this is the one where most folks will live. Nice.

[@chris49ford]

From 255 hp to 459 hp with a top end kit on the junkyard 351W bottom end was impressive. The fact that it improved lower end torque significantly too is even more impressive.

[@lordhumungous7908]

In Australia, we didn't have Boss 302 engines in our factory Fords but 302/351 Clevelands. Although Clevors (Boss), Windsors block/Cleveland heads are popular now days because of all the aftermarket Windsor stuff available from the US.

[@jeffjohnon4223]

351W had the giant leap of power,over 200hp increase,those motors are great,Windsors and Clevelands.

[@johnwilliams8855]

Been running sbfs since mid 70s, they always responded best with bigger cams. Especially with solid lift cam. Don't understand why everyone today run such small cams with way too much duration. Hell with driving a hotrod 20mph , it's a hotrod!

[@GreenCrim]

Big fan of clevors after spinning the big ends on my basically stock cleveland through draining the oil pan into the heads. I couldn't find one of the bearings until I realized the two halves had fused into one. The horror.

[@erikturner5073]

To be honest I'd build a 331, and if that wasn't enough I'd go straight to a 351w. Especially for combos in the mid 400hp range. The boss and cleveland engines are high RPM BREATHERS!

[@glennramsey917]

Richard .. I've watched enough of your videos to be halfway dangerous ..I want to try my hand at a twin turbo set up on a 1987 5.0 using a blow thru carb ..I need some advice .. do you have a min to help a man out ??? I trust you 100%

[@philipmacduffie7612]

I love the 351c/w combos. Such an old idea yet it works so well. I have a set of clapped out closed chamber 4v heads. Makes me want to drag them out again.

[@tomrose6292]

I'm missing the blast of engine sounds. pulling down on the dyno.just me being the motor head I am

[@mikeconn4556]

Great video series!!

[@michaelteel8490]

This might be a amateur question.. but would these numbers be the same for a 302 out of a 68 mustang? If I followed the same setups? It is a 302 but just wanted to know before I start my project!

[@richardholdener1727]

YES-THESE WERE HYD ROLLER CAM MOTORS BUT YOU CAN DO SMILIAR NUMBERS WITH FLAT TAPPET CAMS

[@michaelteel8490]

@@richardholdener1727 okay great I actually have AFR heads and a roller cam setup! Thanks a lot looking forward to my build :). Love your content!

[@michaelteel8490]

@@richardholdener1727 I messaged you months ago! But I finally got to the engine build. I bought a 302 out of a 68 mustang. The bottom end was rebuilt but has stock cast pistons.. would I still be safely able to run these setups without damaging the engine or would I need a forged setup?

[@JacksoNR26]

Hey I was wondering if you build a 347 stroker, how much over bore would you need to gor if for example I'd it's already 4.030 thou over how much more can i go if I break a piston ring and it eats the cylinder wall?. That's my only worry with a 347, other than that under 6 grand that little motor is a monster.

[@richardholdener1727]

some blocks can go .040 but after market blocks can go .125

[@BLEllis5oh]

How about building an EFI 302?

[@robertallen6701]

Tell me again why people claim those 4V Cleveland heads don't make torque? I have a pair in my parts stash I'm building a 400M to use them on. I'm working on the operative theory that the hot ticket for this motor will be a hydraulic roller cam with relatively mild duration, but nearly .600" lift at the valve.

[@edge2sword186]

We did one back in the 70's and made our own spacers for the intake . It was impressive especially the bottom end torque and it still liked to rev. Maybe it was the longer rods? I would like to see so.e dyno info on various rod lengths.

[@robertturner1059]

Hey Richard, do you think the tfs3 cam will fit.?In the explore engine. Without Ptv clearance? Thanks for all the info you are sharing.

[@richardholdener1727]

NOT SURE-I DOUBT IT

[@williamhaggerson5490]

Richard have you tested any Anderson Cams in any of your Ford testing?

[@hotshothogger]

The 11r heads on the first engine, the 302. Must have been the 190 intake runner to make that power?

[@richardholdener1727]

I think they make 190 and 205 versions-either will make that power

[@fastfoxstang9864]

What's the trick to Installing the TFS stage 2 cam in a stock shortblock? I've read and read you can only run about .520 max lift for enough piston to valve clearance. I want to duplicate this combo on my 88 stock piston shortblock

[@richardholdener1727]

THE LIFT MATTERS VERY LITTLE-IT'S THE DURATION THAT DETERMINES THE PROBLEM WITH P-V

[@crimzonzero8890]

Hey Richard how much more do you think a set of TFS 192 high ports would get you on that 351w setup

[@richardholdener1727]

not much

[@nerbon7164]

I'm surprised you don't get more comments say well 400hp on the dyno is like 340 hp in the car.

[@falconater68]

He covers that every video...that's why he says "how we run them".

[@jcaj9002]

Whats the compression ratio for the 347

[@richardholdener1727]

mid 10s

[@vrm86gt]

Boss 302 still climbing at 7K!

[@jaywalkin8205]

Been trying to tell my buddy you’ll never make 500hp na out of a stock head/bore/stroke 302 he thinks he’ll get close with a na carbureted 302 with 40 heads and a alphabet cam, I said no way!!

[@richardholdener1727]

nope-he will struggle to get 400 hp

[@jaywalkin8205]

@@richardholdener1727 as I thought, i linked him to your videos regarding the sbf series. Would you ever consider doing a alphabet cam shootout ? Vs like the comp cam xr stuff I know you have a lot of aftermarket cam dynos on your channel never seen alphabet stuff.

[@shanerodgers1009]

500hp 351w??

[@chris49ford]

Think higher compression pistons will push it to 500 maybe more.

[@shanerodgers1009]

@@chris49ford id like to build a 351 for a swap in a ford ranger and I'd like to have about 400 wheel horsepower lol so im very interested in anything 351w related I just want to leave the stock bottom end in tack if at all possible nothing crazy

[@chris49ford]

@@shanerodgers1009 Then top end kit plus 50 shot nitrous. Use a timing retard box and make sure you have a good fuel supply to help those oem cast pistons live.

[@shanerodgers1009]

@@chris49ford so you think that top end with a set of flat tops would eliminate the need for nitrous or maybe a bigger shot of the juice??

[@chris49ford]

@@shanerodgers1009 I would think so but going to need some data to do the math. A stock 94-96 roller 351W probably has 8.5:1 with stock cc combustion chamber heads. If the heads in the top end kit have smaller cc that will raise your cr right there. Say performer heads will bump it 9.2:1 for example. A one point increase in cr will give about 3-4% power increase. So say after the top end kit you end up with 450 hp at 9.2:1. To add 50 hp you would need to boost the cr by approx 3 points to 12.2:1 to make 500 hp NA on this combo. Might as well go all out at that point and build a stroker 427: 351W 427 STROKER ROTATING ASSEMBLY 12.1:1 (64 cc heads) or 13.0:1 (58 cc heads) FLAT TOP MAHLE PISTONS EAGLE 14125-4125 would probably push close to 600 hp but pump gas is out of the question. On the other hand, there are 427 stroker 351W crate engines with 10.5:1 that make 500-550 hp on pump gas. Theoretical on a napkin doesn't always translate to the real world, so look for a proven recipe. Jan 2015 Car Craft did a 351W build and got 505 hp with the stock crankshaft and connecting rods, a set of KB flat-top hypereutectic pistons, a mild Crane hydraulic roller cam, and a pair of Trick Flow Specialties' 190 CNC 11R cylinder heads. A few months later Hot Rod took that same motor and bumped it up to 595 hp by milling the heads to get 50 cc chambers that bumped the cr to 12:1 and made a cam change but kept the stock stroke. But with 12:1 do you want to run at least a 50/50 mix of pump gas and 110? Maybe Richard's next video will have a recipe that gets you where you want to go!

[@ardennielsen3761]

if its got 400hp or more, it should be in a 4x4 truck.

[@austindoud273]

What lol

[@gregblack4581]

Waste

[@ardennielsen3761]

@@gregblack4581 #Mr.Plow

[@ardennielsen3761]

@@austindoud273 #Mr.Plow

[@brettkelly1436]

What about 400hp efi combos surely you have done some rpm 2 or Holley systamax 2 combos that make over 400 not every one wants to run a carby

[@hotrodray6802]

👍 BIGDOGS PORTING is a great source.

[@richardholdener1727]

lots of those too

[@christianmeeks4430]

It looks like that upgraded cam in the Boss wanted to rev to 8,000

[@drivinwithdrew7676]

No doubt

[@elonmask50]

Wow, that camshaft really improved the whole curve on that little engine that could.

[@19jody72]

Been waiting on this Richard.

[@Zekais]

And that's why I've had my Boss 302 since '75, though, sadly, the car it came in has been gone many, many years. All the nay-sayers scoffed at the non-Chivvie with ludicrously "mismatched" cylinder heads, but any time I had a fairly well-matched combo of parts in it, it exceeded expectations. This will probably be my last build on it since I'm an antique, and it is now out to .060 over, as well. With the good parts I got together for it, and the fact that the heads have FINALLY been cleaned up from factory as-cast form, I expect it will perform better over a broader range than it has before, which will be going some. Wish I had a bunch of buddies with a dyno, 'cause I'd love to compare what it ends up doing to my next build-up, which is a "mock" Boss or Clevor with AFD aluminum heads, a "better" (I think) intake, and parts less slanted to an old school vibe. Nice to have stuff like Richard puts out, that goes for the real effect of architechtures and parts choices, not "common" knowledge that ain't always rooted in unbiased fact.

[@tbyrd32able]

How hard would it be to get your hands on a 7.3L engine in the new super duty? I would like to see you run some test on the new pushrod engine 🤔.

[@dannycalley7777]

T.B. .............try RevAn Evan web sight got 7.3 from a couple of months back ,its impressive !!!!!!!!!!

[@madmod]

They sell the complete long-block for just over 8k. It'll be a minute before wrecked trucks end up in junkyards. Hopefully the older ford 6.2 start becoming more available too.

[@cavscout62]

You can buy one directly from Ford as a crate engine right now, today. Pretty easy.

[@elonmask50]

Woohoo, Boss, fingers crossed it doesn’t let us down, luv your videos Richard.

[@mikev.7361]

I can't wait for the 500hp stuff... But what happened to the 289?!? *sad panda*

[@dakotastimeout2827]

Ya id love to see some 289 videos

[@georgegriffith1255]

Yeah would love to see some 289 or even 260 tests!

[@jasonhooey5677]

The power curves will look the exact same, just less total power and torque from the smaller motors

[@str8edge_lifer83]

So 408w with Cleveland heads! 550hp good to know

[@drivinwithdrew7676]

This video confirms why I like Cleveland heads so much. I saw a dyno comparison with a boss 302 and a boss 351, they made identical peak power, the 351 just made a lot more low end torque

[@ArmandoMartinez-zz5xt]

Been waiting all day for this video. Thanks!!!

[@joebaxter4235]

Boys in Australia 👍👍

[@ts302]

The BOSS 302 rules!!! Many moons ago, I passed on a set of Boss 302/351C heads. As a young hotrodder, I was told that these big port heads on a small motor would not make any power below 5K rpm-myth busted!! Have you run the 351C 2V heads, with smaller ports than the 4V and open combustion chamber-good enough for a boosted application?

[@VIP854]

So how much horsepower can a 302 block actually handle? I seem to be hearing different answers.

[@Greenskies321]

I’d be curious as to how much power you’d get extra on the boss/cleveland 4v heads with the exhaust port plates that fill in the bottom of the exhaust ports between the headers to prevent the tumble that the exhaust ports are notorious for. Some people use to epoxy them in for a higher port shape and claimed to get significant power increases

[@eformance]

I have to say, I was not impressed with the valve springs TFS put on their TW heads. I had one break with less than 20k miles on an E-cam. Motor was 4yo and driven 5kmi a year give or take. However, it did give me a good excuse to ditch the terrible E-cam (terrible for anything but a stock engine IMO) and put an XE270HR in its place. The TFS heads don't work with the springs on the cam card, so I picked a set of 330lb/in springs. 165lb on the seat, 330lb open, .530 max lift. XE270HR with .512 lift worked great, the TW heads fall flat after .500 lift anyway. That is a great cam for a TFS TW head and street manifold combo, roughly 10.3:1 compression. Makes lots of torque and pulls to 6k.

[@FordsR4Me.]

I enjoy all of your videos! I'd enjoy if you were to ever do an all efi 302 videos. I'd just want to see the cheapest top end efi kit to the most expensive top end efi kit

[@SophiaAphrodite]

I feel like you should include a $ per HP gain for each of these. Excluding the stock engine cost of course.

[@andyharman3022]

Keep putting more cam in that Boss 302! I want to see it at 500 hp.

[@georgegriffith1255]

Yeah or 600 maybe na?!?

[@welderteach]

Love the ford stuff!!!

[@jameshelton8631]

The stock motor with 9psi was the most impressive. 400+ hp and torque. What about a centrifugal blower on a stock motor?

[@richardholdener1727]

I ran a Vortech on my stock Mustang 5.0L-it works fine

[@wrxracer25]

Hey @richardholdener1727 love your videos! I'm in the process of swapping a EFI 351w over to a carburetor and was wondering if there was any issues when you swapped this one you used in the video? Did the Intake fit right up? does it just take any normal 351w distributer? Someone was telling me the deck height changes on the 351w EFI compared to the Carbureted version.. any input helps! thank u!

[@richardholdener1727]

deck height is 9.48 vs 9.053 but I don't think that changes the distributor pad height

[@luisaponte9165]

I have a comp cams xe274hr and I am not sure if would have enough PTV clearance on a stock 1992 ford 302 roller motor with an afr 165 heads?

[@bwhiston7756]

Love the vids Richard, any chance we can do same video back to back with different EFI systems and manifolds. Keep up the great work

[@ttx888]

Do you read the Article in Car Craft or Poplar Hotrodding entitled 400 HP from the Stock Cam. This article addresses exactly what is covered in this video. But I always find my videos informative and entertaining, thank you very much. Here is the Link from hotrod.com: www.hotrod.com/articles/ford-302-v8-engine-buildup/ Here is the Parts: '91 5.0 Roller Block, New Piston Rings, new Bearings, AFR 165cc alum heads.......60 cc 1.90 I..... 1.60 E out of the box PN 1472 emis legal works with stock pistons, Weiand stealth dual plane / 625 cfm road demon jr, Dougs headers tri Y 1 5/8 to 1 3/4, Stock 1.6.1 stamped rockers then switched to Comp cam 1.7.1 rockers

[@richardholdener1727]

I'll check-I may have written it

[@kevenshores804]

Car craft article from the awesome Matt King days.

[@aaronliddell4280]

Best series ever! 👍

[@jesses1097]

Do a dyno pull with a HCI 302 then put 180 degree headers on and see what kinda power gains you get from them.

[@elmerfudpucker3204]

I'm old. I grew up in the late 60s and have had the pleasure of driving and owning almost every one of these pushrod engines on this site. My first car was a 70 1/2 Z28, when they couldn't give it away because of the gas wars. it wouldn't even start on the brand new at the time, regular unleaded. I have family that has worked for airlines for most of my life, so I could get enough avgas to mix up batches to make it fly. Few years ahead, I got ahold of a 71 Boss 351 Mustang. I don't care what anyone says, that car would spank my old Z28, any day of the week. The car was huge, and terrible to try to back out of parking spots, but by far it was one of the fastest stockers I have driven. It pulled from idle to red line, never missing a beat, and many big blocks were left in it's dust. Someone else wanted it worse than I did, and I messed up and sold it. I still miss that one more than most of the others I've had, with the Z coming a close 2nd.

[@richardholdener1727]

take a look at the Boss 351 video-it made the most power of any muscle car small block.

[@Leviwiebe]

400hp on a 302 is sick but mannnn id feel scared revving out to 6500.

[@chris49ford]

With a steel crank proper oiling windage tray roller cam good valve springs and most importantly a properly balanced reciprocating assembly I wouldn't be scared. Richard did an article on a 8000 rpm 347.

[@Leviwiebe]

Christopher Seay fair enough. But for me, who only wants a street purpose, I’m probably not gonna rev out that high while I run to get eggs 😂

[@hotrodray6802]

As I have always heard.... How long will it rev that high? = Until it finally blows .... Of course. One time or 1,000 ?

[@hotrodray6802]

🔔👍 Love the SBF stuff!! Im stuck in 1990 with a stock 5.0 GT HO fuelie T5. 25 yrs. It has all been tried. Where can I get reasonable hop up information for this fuelie? Thanks for your great videos.👍 YeeeeeHaaaaaw!!! 😁😁😎

[@thegalli]

yes i found a vid that still has the music !

[@tbyrd32able]

I bet that thing could crank out some good power with bolt on parts.

[@ivancolesnic]

I currently run a 331 in my Maverick with afr 185 and a 281hr cam with 1.7 rockers. Happy to assume i make at least 400 hp

[@hotrodray6802]

window stickers 👍👍👍👍

[@tomrose6292]

My sbc was a 355 untill it ate 3 roller tappets,when I tore it down ,I went with a 3.750 crank 13.7 to 1 slugs and just went with a lil bigger cam @.615/.625 .I home ported the heads myself wp angle plug 64cc iron heads .010 off the heads .my port job was little more than deburing ..haven't dynoed it just dropped it in and run it ..the difference was something I'm quite satisfied with.

[@VIP854]

Is that their 1 inch spacer?

[@alyandrostanford8741]

Good afternoon what site did you buy your 351w supercharger on???

[@richardholdener1727]

302?

[@alyandrostanford8741]

A supercharger for a 351w

[@markweber7275]

Richard I know this is extra work but if possible listing the parts separately for each combo would help so we could study and make better decisions based on budget constraints. Thank you for consideration of my request. Your videos are great. Mark

[@markmccarty9793]

Just start with a 351w, preferably a 93 up so you got a roller cam. A half inch more stroke, right at 6" connecting rods! I'm 63, been hopping up these things for 45 years! Find a 351w, unless it won't fit! If not, sell that and get a fox body!

[@AndyFromm]

Not ls! 😍

[@stevecooper8121]

This is the best ford small block series I have ever watched.Richard has out done his self again.The man is a Ford genius..He's like a FBI investigator just the facts man.

[@bigredracer7848]

91👍's up Richard thanks again for taking us all along with you for the rest of the story

[@matthewdupuis232]

Hey Richard! You've probably done more cam swaps than most people, so what is your opinion on installing and breaking in a used flat tappet cam in a new block? Precautions, procedures, caveats?

[@richardholdener1727]

I put mold based assembly lube on the cam lobes and lifter bottoms, add break in lube to the break in oil and run with minimal spring pressure if possible (remove inner spring)-that usually works

[@gregoryjowers3629]

Let’s make 1000hp on 302 stock rods and stock crank and gap the rings sling the rods out the oil pan................ go for it Richard

[@jimmiller4667]

Gregory Jowers any idiot can destroy an engine, proves nothing. Build something to be strong and stay together, that's impressive and not everybody can do. You want to see "the rods hangout" find a mouth breather style channel. Too many idiots out there blowing shit up.

[@gergatron7000]

Us aussies do like Boss 302s, but we never got them here. We did have a 302 Cleveland, which shared the same parts with a 351 except for crank, rods and the closed chamber 2V heads. This is where "Aussie 2Vs" come from. Only 302Cs got them.

[@jeffschwartz5199]

I've been watching the Touring Car Masters from down under (and I love it) ! They've got some of their stuff running out past 8300 ! Sounds great , and if you don't believe me , it's on you tube .

[@coyote5.02]

Jeff Schwartz power

[@TMB5BER]

Oh yeah love that Aussie stuff, they rock down there

[@jeffschwartz5199]

@@coyote5.02 Lol , (Space Balls). Yes , I get alot of jarin!🥫 (I don't think that's a jar) ? Best I could do .

[@detrickv]

HOW TO: Big Block ford FE hp series...PLEASE! I NEED ANSWERS! FOR MY 428 IM BUILDING SOON

[@packhousetv]

What’s sad is 400 horsepower is mediocre these days. If you don’t have 1000, what’s the point. Lol

[@deanstevenson6527]

It wasnt too much port size that hurt low end torque it was 3500 pounds of weight. The right cam for the Boss 302 is one that works with the right 4bbl Holley. Simply what all the LS engines do so well, Ford did back in 69 with the G code. Great comparisons Richard. Lays to rest aspects of the Roger Huntington myth that the little 302 Boss has no torque. Its got boatloads compared to a Tunnel Port 302, despite the 15% bigger 351C 4V ports that flow 46% less air at 600 thou lift. I loved my time in a pristine 70. kzbin.info/www/bejne/nJnZq2SsaZ5khbM

[@nicksteger1265]

On the 400 hp 302 with the spacer did adding the spacer to the dual plane drastically change cab jetting?

[@richardholdener1727]

yes

[@fastmonaro05]

Could you please show the power figures with the Four Hole Spacer. I was looking at a 1 inch fourhole spacer for my 308/ 5 Ltr Holden V8 motor that runs a .214@ .050 lift camshaft.

[@MrBlackbutang]

Wat ? Ok o

[@fragman21]

Damn-it! I didn't make it here first!

[@robertrosetta908]

www.mustangandfords.com/how-to/engine/28898-400-hp-302-small-block/ 400 hp with stock heads and no blower

[@caseym3118]

What happened to low-down 5.0 mm/ff procomp heads intake Back in 09 I think 🤔 made a wink under 400hp for 1000$ with a relatively small cam .

[@richardholdener1727]

lots to choose from

[@Scootermagoo]

Ford Man is pleased. boss 302 with the same cam I ran in the edelbrock top end kit.. Explains why it wanted to rev to 8000 rpm..

[@burtvincent1278]

Love your stuf! Keep bringing the great information.

[@frederickhairston3823]

Could you show 351w bore 40 over with victor drag head 205cc cam lift 650

[@ericmuhlbeier8023]

But what about the truck intakes?!! I found an edelbrock efi truck intake at a local junk yard and have been curious what the do to the curves

[@D3thM3tal]

Always wondered how my combo would make power. 351W, 10.5:1, ported TFS170's, Comp 35-518-8, RPM Aig gap with a 600CFM TBI through shorties. Thanks for all the testing!

[@richardholdener1727]

TBI?

[@D3thM3tal]

@@richardholdener1727 Fi-Tech 600 Power Adder. TBI Injection, basically.

[@jasonwalls1277]

Richard, take the 306 that u got and put a solid flat tappet cam with duration in the 250 plus area and around 600 lift with a victor jr intake and lets see what it makes. I had this combo and it was a screamer.

[@willgogas8628]

Richard, Would a spacer work on that Boss 302 combination?

[@Frontpagefab]

What distributer were you using on the 302?

[@theozman38]

Fords boss to dodge’s judge. Who has the authority??? Thanks Richard

[@cavscout62]

It’s so easy to take a 351W and build a 427 that makes 600+hp and great torque I don’t understand why anyone would even mess around with a 302 anymore except for the BOSS 302.

[@richardholdener1727]

427 IS DIFFICULT WITH A STOCK 351w BLOCK-MUCH EASILER WITH 4.125 DART BLOCK

[@donaldcameron8909]

High school buddy had one was ah blast like to find a Boss 302 set-up

[@haroldandrews1123]

I am building a .060 over 351w for a boat. I have a set of fresh stock heads from the Cyclinder Head Shop. Using a xe274 with 10 degrees lobe separation flat tappet cam and 9 to 1 comp will it make 300 hp?

[@richardholdener1727]

what intake? but probably yes

[@jimhodges3471]

Will you be doing more testing of the cadillac 500?

[@danieldelpha1315]

Whats the power limit of a 174 blower?

[@chris49ford]

The problem with those little roots blowers is that at a higher boost level you can't stop the belt from slipping. 6-71 or centrifugal if you want to make serious boost.

[@danieldelpha1315]

@@chris49ford but if you have 450 will it make 600 ?

[@chris49ford]

@@danieldelpha1315 I would think a little blower with 6-7 lbs of boost would add about 100-150 hp at that level so I vote yes. These little blowers have to spin crazy fast to generate boost - at 7 psi it's spinning 12000 rpm at 6000 rpm engine speed. They max out at 14000 rpm but above 8+ psi boost levels you get a lot of slippage from the serpentine belt drive. Might be having to change out the teflon tips on the rotors more often than a 6-71 that could make that boost at a lower blower speed.

[@richardholdener1727]

it can make 600-but not easily

[@chris49ford]

I knew someone 20 years ago that put one of these little blowers on basically a stock 350 in a street rod. He topped it off with dual sidedraft Weber's using an adapter plate. On a 400 mile trip to a national event it melted the pistons. I always thought it leaned out because the dual sidedraft Weber's weren't enough to feed it, but it could have also been a timing issue. Just make sure you avoid lean conditions and detonation. May want to consider air/fuel ratio sensor, knock sensor, boost referenced timing retard, and maybe even water/methanol injection.

[@hotrodray6802]

Didnt the factory Boss 302 have the 289 HIPO cam ?? specs are identical.

[@hotrodray6802]

Boss got 1.7 rockers

[@tomrose6292]

Gotta love that 218 likes and zero dislikes good job richard

[@j-port8818]

seems rare to hear about Canfield heads anymore. they use to be the hot ticket.

[@bluespig1]

Love a Windsor 5.0i Oo===oO

[@CourtneyEdmonds]

Awesome series I have learned so much for my build.

[@tombenson4692]

**What's wrong with my 400hp combo? 95 mustang 302. Stock bottom end, TFS Twisted Wedge 11R 190 heads (66cc) with Ford B303 cam, Ford stock Cobra intake, Procharger P1SC (8psi) with 3 core intercooler. Made 400 rear wheel hp at 6000 rpm. I know I lowered the compression going to the 66cc heads, but I figured it would do better than that. Any ideas?

[@richardholdener1727]

is it on pump gas?

[@tombenson4692]

@@richardholdener1727 Yes. 93 octane. 60lb injectors, 340lph in tank pump