Comparing Holley’s New High Ram For SBC To Old Tunnel Rams

[@GNaron]

I'm installing a holley Hi Ram tall version on my 1993 chevy c1500 355 SB. I did a under hood mockup today and there is around a 1" to spare on the hood clearance. The only clearance problem is the factory AC and belt tensioner on the OBS. But that's ok cuzz I been looking for good reason to install a Holley Mid-Mount Accessory drive. Also Holley cast a nice pad over the rear water jacket, so I'm piping some coolant out of the back of the heads to the water neck. I think Holley is going have sell a lot of Hi Ram for SBC's before they start making different hats. With intake being dry and running Brodix IK 200 64cc 2.02, I'm thinking it should make good street power and have good driveability.

[@stevenbelue5496]

I thought Holdener would capitalize on the sbc big bang, im glad Eric is doing this. I think it will get the views.

[@jakeblack4095]

Thanks for the update Eric will be neat to see results on the 421

[@atheplummer]

Yup Tunnel rams work great for both strip & street. I suspect the only intake that would make even more torque would be the old Smokey Yunik SY-1.

[@chevyrc3623]

I thought I saw that manifold on Facebook marketplace

[@NBSV1]

If you’ve got the room a tunnel ram is often great and gives about the best of everything. Some of the factory fuel injection intakes are like mini tunnel rams.

[@DavidB7474]

The Smokey Ram SY1 intake is different. I’d like to see what it does. I actually run SY1 on my 350.

[@shadvan9494]

I own a 1971 Camaro SS 396 4-speed. 1970-81 Camaros and Firebirds have the lowest hood Clearence of any of the GM cars from that era. there is even less clearance than 68-82 corvette. even the Edelbrock low rise Torker II -O will not clear the stock hood on big block in a 70-81 Camaro. I know the OG Performer and Performer RPM fit on a small block in a 70-81 Camaro, but you have to run a drop base low profile air filter on them. so that is impressive if it will clear a stock hood on a second gen Camaro.

[@242bleek]

Id love to see this intake in a back to back ported and non ported comparison with the Holley stealth ram.

[@johndeborg6606]

Hey Eric, g ,day To u, glad u will be doing a dyno shoot on small block strength test , the 350 motor build sheet your doing if you look back a ways , is what a typical hot sbc street /strip motor u would build back in the day exactly !! I'm really ecstatic, excited to watch that video to see what the block can handle hp wise. I don't really usually enjoy watching people waste motors, but I never knew the strength of a production s/block . I was always told 520hp is iffy! Thanks 4 your time , regards Johnny australia...

[@tomv7552]

Longer runners are typically designed for more low down torque and power, there is so much documentation on it, it’s crazy people think it’s rubbish. I guess it’s because of the whole boosted world where it doesn’t matter so much. Header length also can be tuned for where you want the power and torque to be, Or if you want the best of both worlds, short headers and long intake runners.

[@Adrian-hr3hf]

Yes. Proof of your statement is in the old Mopars with the cross ram intakes, I think they were called. Massive torque way down low.

[@atheplummer]

I wonder if Holley developed the new high ram, as a result of me calling them about 6-8 months ago. I was wanting to put a tunnel ram on my BBC, and use the LS High Ram top. I also wanted to be able to install a Tick Performance air/water intercooler between the High Ram & the Tunnel Ram. The tech guy I talked to thought it was a great idea, but they didn't have any info on if it would work. I guess they took a look & this is what they've developed. Really cool.

[@atheplummer]

I really want to do a ZZ632 with the above setup in a 76 chevy pickup. The whole point to the Tick performance is, I want to run a air conditioner compressor on the engine, with a refrigerated water box for the intercooler. I'm willing to bet that setup would get the water soo cold, you'd have to run antifreeze in it. Would work great for boosted applications.

[@trdscfjc]

The Holley bbc high ram has been around for the COPO 572 for a couple years now, now that the 572 COPO is being phased out Holley is now contractual allowed to release them under the Holley name.

[@flinch622]

8 months? Probably was already in the works. But a ram without wet flow intricacies at the runner entries, and it solves some robbing issues that two plane cranks bring... could be a ton of fun. Looking forward to seeing dyno runs.

[@popeye089]

@@trdscfjcI really was hunting for,one of those copo high rams for a while

[@shimshonbendan8730]

Would the lower version fit a '69 Camaro with the ZL2 cowl induction hood? Also, is Holley planning on coming out with this for the Big Block? Great info btw.

[@AliceEmpireBreadfan]

Video from Holley says it fits second and third gen hoodlines too

[@MRnicknitro919]

Eric can you make the elderbrock tunnel ram pull better or as good as the Holley dominator ram and have the best of both worlds? Asking cause i want to buy a good tunnel ram setup for my 406SBC. I have a weiand high ram type and a set of original 660 center squirters but freiburger and Brul'e say it needs alot of work to have good A/F ratio..etc. your input much appreciated.

[@stevewalters6853]

Vizard did have a video up on TR mods seems some runners were leaner than others the video addressed that.

[@MRnicknitro919]

​@@stevewalters6853yes agree. I have all of David's books and seen his videos. He talks about the puddling up top and how to stop each port from robbing each other.

[@b_hall]

How would that intake compare to the Edelbrock proflo XT and the Holley stealth ram?

[@fivestar8337]

If I ever go EFI this intake with the tall top is what I want

[@disassterb8]

i wanna see a dyno test between this and the proflo XT sbc tunnel ram

[@vech400]

And the Edelbrock Victor ram 7070

[@ThisFyneOleTruck]

I'd love one of these for my square Burb daily driver. 355. 9.86:1,Performer Air Gap w/AVS2 650,XR264HR-10, Eagle rotating assembly, Brodix IK180 65cc w/ LunatiVoodoo 1.5 rockers, a very built 700r4 w/ TCI full man rev vb, 3.42 I probably should have went with a bigger cam but I already had it and I have to pay for the fuel😅. It sounds really good. I have it ready to go back to EFI (had TBI),I want a multipoint system like this..was considering the Edelbrock system but Luv the look of this.

[@trdscfjc]

Eric, Will the new BBC high ram be coming in a tall deck version?

[@rickwent9192]

Eric have you ever tested a Weiand 5984?

[@davidmccormack2172]

Hi have you tested the edelbrock pro ram 11 tunnel ram. I believe back in the 80’s no tunnel ram came close to ebelbrock pro ram 11. I was given 2 brand new old stock units dad had as spares just in case. Please do a Dyno test soon.

[@cedricwilson2055]

Send one in he’ll test it

[@jacksonbermingham2168]

I think for the sbc you're going to have to really make it all the tricks on standard parts to get 1000, if you had 800hp id be happy with that

[@tommybilbrey1471]

A fabbed top plate with twin throttle bodies would be cool test or the torque storm utilizing this intake

[@Theoriginalsoundoddity]

When are they making them for 18° heads?

[@Wardaddy1124]

I’m pretty sure that Hogan Frankenstein and a few others already make a efi version for sbc I know I have a Hogans intake on my 4.500 bore spaced sbc.

[@WeingartnerRacing]

Sheet metal yes. Not as cast.

[@HotRodDave]

That will be a cool test on the 350

[@p0intdk]

How viable is it to port the new holley to like a 1206?

[@WeingartnerRacing]

It will go 1207

[@scottwilkie8891]

I can’t wait.

[@chevyrc3623]

I don't know how much power I think it might handle i don't know as well so I don't know 700hp I am thinking circle track stuff because we run high rpm for a long period of time so in a Dyno my guess is 700 to 800 then a rods might fail just my guess

[@stevenbelue5496]

An 010 casting might hang in there for a while, splaying a 2 bolt with a girdle. The decks give up on the 400s long before the small bore blocks.

[@stephenmaggard1280]

It will fit under a 2nd Gen camaro hood, I have one.

[@boharris8179]

You can get away with less csa because it's just air...no fuel until the injector

[@craighills2382]

Sadly your only weak point is the snout .The Chev engines are very stong as you are aware Eric

[@MrBigDeel]

I think the block might fail first.

[@roberthollinshead2325]

I think you are right. Seems like most of the common failures are cracked bores, cracks through the lifter valley, busted main caps-all seen 600-750 hp level. Fill the block, girdle the mains, stud everything...it may take more

[@MRnicknitro919]

@@roberthollinshead2325 I have had SBC handle 750hp with ease. Spayed main caps, and half fill block for core shift and good arp bolts is all that was needed. Bill Grumpy Jenkins back in the late 70's thru the 80's was making 700hp- 850hp with 327cid made to 331 CID naturally aspirated with old school technology....it's all about the machining and combo.

[@chevyrc3623]

What's funny the LS guys make fun of SBC guys for block breaking or whatever but yet the LS rods I have seen them break and broke threw the block so yeah LS breaks to so LS guys keep your mouth shut just saying trying help you guys be less dumb

[@chevyrc3623]

@funfun8095 say a guy who probably reads that off the Internet while I have seen a LS engine myself has blown a rod threw the block I may of not seen it blown but I saw the damage man and all it was in a truck probably a guy reving it or whatever but it did not look no 1500hp 6.0 I saw blown

[@chevyrc3623]

@@funfun8095 oh so you do look at Internet stuff ok, you know LS has more issues than just rods like cracks heads which both SBC and Ls have and blown head gasket on daily drivers on both how do I know that I was in a machine shop that surfaced heads, and I run circle track and there is LS that run circle track and you know the first thing they is at least change the pistons to forged pistons doesn't sound like stock bottom end to me and then higher build would change the rods to they will keep the crank I will give you that. So also have you seen builds from drag racers with turbo actually have a total aftermarket LS engine and nothing stock when they run really high boost and hp yeah. Just saying at least a lot of what I am saying not all of it just some I have been around those guys in person and not just internet search. Mainly the circle track stuff between 450hp to maybe 700hp

[@chevyrc3623]

@@funfun8095 even if your been around to race against did you see there bottom end builds because I have when I see my guess and they tell me straight up on what there running. This is just circle track now yes we go threw engine because we rev the crap out of them for long periods of time vs drag racing but still no straight stock bottom end LS.

[@Davem-f6k]

Richard Holdener made 1600 on the engine dyno on a 6 L Chevy

[@WeingartnerRacing]

Yes with turbos