Tahoe Headers Dyno Results with E85

How much RWHP are Headers Worth?????
We test it out on Pump Gas and E85
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[@christopher3067]

Whats cool is how you gained 40rwhp with the headers. Headers on a stock cam 4.8/5.3 will only gain 20+/-rwhp, so it's neat to see how combination of parts work together to help the engine be a more efficient air pump. Meaning headers with stock cam will gain 20hp and say the cam with manifolds gain 30hp, but cam with headers gain 60-70hp, so you gain extra 10-20 hp when the parts benefit each other. Same goes for the blower. blower on stock cam/engine might gain 100 hp at 6-7psi, but blower with cam and headers on 6-7 psi might gain 130hp on top of the 60-70hp the cam and headers make.

[@JKZ103]

Just changed my cammed highly modded 5.3 03 silverado to flex fuel and finished tuning the MAF yesterday. Wemt with a gm sensor and since it was a v6 truck its a return style fuel system. Holley rails and regulator on the return side. It turned out really clean. Did a segement swap and retuned everything. Im gonna say i picked up 15hp and 20 tq by the seat of my pants. Was able to add 2 degrees to the base map and added 2 degrees to my flex fuel multiplier table as well and no knock at all. The thing hauls ass now. Also runs smoother and more crisp. The benefits for e85 are more than just hp numbers. This is all in preperation for a turbo this winter. Truck put down 362 rwhp on 93. Looking to hit 375 rwhp before the turbo goes on. Great content!!!

[@Des420]

I couldn't have asked for a better set of videos, so thanks for doing all this testing. I've been wanting to get more out of my own Tahoe, and this series is pretty much a cost per horsepower gain on everything.

[@MidnightCustoms111]

My 03 yukon is is l59 truck. It's on e right now. Fixing to order hptuners btr stage 1 turbo cam ls7 lifers and ls9 head gaskets with posted 243 heads with a ebay 76mm turbo

[@truckguyjoe]

Good start Jeff! Looking forward to more updates.

[@about2088]

You need gear and a stall for those tall rims and tires. If I had to guess I'd say you funny have the 3:73 gearing. You'd want at least 4:10 if you still plan on freeway driving. Love the build. Keep up the good work! Subd for progress!

[@HighPSItv]

+About20ninj45 The truck has a Yank converter in it. But still the stock 3.73 gears.

[@curtisholland6564]

Z71's with tow pkg has 4.10's from factory with trans cooler

[@ricktokle5848]

😎🇺🇸 Hey Buddy enjoying the Tahoe mods and what’s really interesting is the results the Dyno shows on the mods you made. Good Stuff 👍 I’m a resent new subscriber and enjoying your videos.

[@HighPSItv]

Thank you sir

[@luvsthestarz66]

Luv the channel. Keep up the great work!!!

[@rickygonzales4523]

Good video I have an obs Tahoe I’m gonna ls swap with a 6.0 we’ll see what happens lol!!

[@Simpleminds81]

Damn that's a bad ass tahoe. I have a sierra that I would like to have sound like that.

[@theoiv]

Great video Jeff.

[@MarkBSmolen]

Hi guys! I just added e85 to my 2004 Silverado 5.3 LM7 w/ all bolt one’s including a BTR stage 2 cam kit w/ speed engineering (LTH) & full 3” duals a Trailblazer intake & MSD street fire ign coils & plugs & e-fans, big alum radiator & full Dynotune doing 389HP on pump gas… Anyways I just added my EAD five conversion and I want to find the tune to add it into my HP tuners is there any link that you guys can send me for that one chance or can you recommend where I can find it please??? Also what are your thoughts on injectors should I upgrade them as well at the same time and if so do you have any links to those as well for some that you might use give him I set up is greatly appreciated thank you so much!!! Love the channel on the contact you guys put out it’s really cool and I appreciate all the help in advance thank you!!!

[@calvingandy1223]

Wanting to see if I could get a list of the mods you've done so far..want to start my 03 yukon..got the 5.3

[@HighPSItv]

If you check out my other videos, youll see every mod i did

[@jacksmith3189]

Big wheels and tires eat HP

[@derJackistweg]

... and how is Newton going to explanier that?

[@james10739]

It looks cold in the north I believe they run weaker ethanol blends because when it's real cold the ethanol does not like to start so they go more gas but I have no experience with it just what I have heard

[@downbuick85]

love the tahoe

[@jpwrangler1]

That thing sounds great, What muffler are you running? It seems pretty quiet to not have cats.

[@HighPSItv]

Masgnaflow

[@jeremywheeler8062]

Do you still have the front driveshaft installed? On some of the older trucks the transfer and front driveshaft still spin and it just uncouples the 1 front axle so the spider gears get super angry if the front wheels aren't turning. Does it have a cam? Seeing what kind of power my burb might make.

[@betochipistube6543]

What all was done to get to 310HP?

[@d13g0ort]

Are you doing another run on the track after this modifications? To see how much you improved Love the tahoe videos by the way

[@HighPSItv]

+d13g0ort we might on sunday

[@d13g0ort]

High PSI tv 👍 cool post video pls

[@JosephNnbs]

What gear was that ran in? Seemed like it ran through the gear stupid quick

[@bullet-sm5gd]

What if u already have the flex fuel 5.3 can I install headers and a tune and run e85

[@americanoutdoorsman6348]

Holy crap i guessed pump right on

[@davevartanian76]

Loving it I have a 6.0 2500 what an intake in the super 10 but I'm looking to do headers reprogram and all these other little tricks that you're showing me now thank you so much she's fat I need all the help I can get

[@matthewherring8042]

love to dyno my ford with 480000 miles then it it with some nos. like start at 50 and go up.

[@boostv8chevy457]

Hey man. Nice info. What type of header you guys used? The jump is big man.Shorty or long? wich tube size? 41Hp extra with the tune right? so change headers and tune the car? what changes must be done? timing fuel? what?

[@HighPSItv]

When we put headers on a car or truck we retune everything. Even the transmission. We normally use Kooks, Stainless works or Pacesetter. Always Long Tube

[@brianbueler3908]

Was this truck already setup for e85 from factory?

[@marcosmelena9917]

What injectors did u use to run e85?? I have a lm7 fbo an wanna do e85

[@JosephNnbs]

Go to glenns auto performance and get the 50lb delphi drop ins. Get a tune and E85 sensor and you should be okay to run blends of E85 until you run new lines and pump.

[@NewGunzSociety]

other then the headers and y pipe. what other exhaust do you have? what muffler/mufflers?

[@HighPSItv]

It's a magnaflow cat back

[@DarkLinkAD]

@@HighPSItv Did you tune for both fuels?

[@Matt.R.B]

What exhaust is in this Tahoe when doing the pulls?

[@streettraction9405]

Exhaust setup? Sounds amazing

[@HighPSItv]

Mbrp

[@camik1ng36]

What brand lowering kit is on the truck and what's your rear shock set up?

[@HighPSItv]

+Cameron Foster McGaughys and Monroe reflex

[@camik1ng36]

High PSI tv happen to remember the part # on the kit? Was it spindle or torsion key?

[@HighPSItv]

33049 McGaughys

[@scottstrang8347]

I am not being a smart ass here at all I legitimately asking ... .....how can you get 40 rwhp out of just headers ? That seems like wayyyyyy to much.....are stock exhaust headers that choked up ? .....maybe I am missing something? Lmk, I am very curious. Thanks for a cool video ! ......we're the headers installed and then a tune and that combo of tune and headers got u 40hp ? Or is it stock tune before and after headers ?

[@HighPSItv]

Yes. That's headers, cat delete and a tune combined. Usually you net 30 rear wheel with headers

[@lillypalmalahanderson3371]

How exactly do you tune the computer to run electric fans? Might be a stupid question but I'm a little confused.

[@HighPSItv]

Yo u have to add a patch to the pcm that allows it to output a signal when commanded. PCM for less has a bunch of info on their website.

[@MiguelGarcia-yw6qo]

What others modifications were done to the tahoe aside from the headers for this pull? Or was it a completely stock engine?

[@HighPSItv]

Camshaft

[@joel1990sb]

Any 2014 5.3 cammed chevys running e85 out there??

[@joe212]

I'd like to know what torque numbers are?

[@HighPSItv]

joe 212 it's in the video ;)

[@jasonloera3358]

Is it only e85? I want to do this to my 2000 Silverado 4.8 but I want flex I fuel cause there’s not a lot of e85 pumps around my area

[@HighPSItv]

It's flex

[@jasonloera3358]

@@HighPSItv what all did you need? Just the flex fuel sensor and e85-compatible injectors?

[@dannyyomama2407]

??

[@lsluvr7386]

Where can I get the parts to do the electric fans on my 03 suburban?

[@HighPSItv]

PCM of NC

[@larry3253]

Nice !!

[@kohlguenette6669]

What’s all done to it?

[@kjam87gxp]

Can u put e85 in any car

[@michaeldunn9524]

Is this the 5.3? And just headers and E85? I’m guessing intake too?

[@HighPSItv]

That is correct

[@erasedfromgenepool.4845]

Dude that is extremely decent gains for a 5.3 I'd be happy as hell with those numbers ...✊✊✊

[@roryfoster482]

Is that with a cam and valvetrain? Or is that stock too?

[@HighPSItv]

Cam and springs

[@amariodom4858]

Sweet Tahoe

[@amariodom4858]

im back

[@moejr14]

So you went from 260hp to 300 hp with by just adding headers? Thats ant amazing gains in hp for just headers. Sorry if im mussing something im not too mechanically inclined

[@HighPSItv]

Headers and a change in fuel

[@PlayaMadeMeskin1]

Which headers are you using???

[@carlosortiz4051]

What dyno is this?

[@HighPSItv]

It's a Dynojet 240

[@kensuich594]

What muffler/diameter exhaust are you using?

[@HighPSItv]

3" magnaflow

[@johnnymissfire8464]

Was the 268 hp before the cam also?

[@HighPSItv]

yes

[@fl_atv_riders4455]

what all is done to it at this stage

[@HighPSItv]

Headers, cam, cai

[@matthewa141]

Are you going to swap the 4L60e out for a 6L80e?

[@HighPSItv]

No. Stuck with a 4l60

[@matthewa141]

@@HighPSItv has the swap of a 6 speed manual been discussed for a daily driver perspective? Ive been thinking about doing it in my 03 XL 6.0

[@HighPSItv]

I've seen it done. Not sure if there is a kit or anything

[@wiglz9670]

From the other video's I noticed this tahoe is 4wd, are you disconnecting the front driveshaft when putting it on the dyno?

[@HighPSItv]

No, you can run a four-wheel drive truck on a two wheel drive Dyno, just not an all wheel drive truck

[@wiglz9670]

High PSI tv .... haha my bad, I have a Denali = awd...

[@garymaya1767]

U need a cold air intake.

[@01m6ss]

5.3?

[@HighPSItv]

YUP

[@NickF-kd2su]

Is the 268 with a stock cam?

[@HighPSItv]

No, a 224 Truck Cam

[@NickF-kd2su]

High PSI tv did you dyno it completely stock?

[@OCALLARM]

348 and 371

[@MRALL4FUN]

Well shit I was close at 302 on pump gas but way off at 375 on e85 lol

[@joshamorquecho8754]

Your Tahoe 4.8? Or 5.3 ?

[@HighPSItv]

5.3

[@joshamorquecho8754]

High PSI tv are the 4.8 Tahoe good ?

[@james10739]

What all was changed to hurt the torque I know y'all have wheel numbers but stock it's like 295 hp and 325 or 330 torque at the crank why do y'all numbers not seem to reflect that

[@HighPSItv]

Headers and a cam will hurt torque numbers

[@downbuick85]

what size tires and how many inches is it lowred

[@HighPSItv]

+downbuick85 285 35 24 and 4/6

[@edwardmoon5221]

So e85 is not really e85...lol

[@Performancecustoms]

Edward Moon no its up to 85%

[@HighPSItv]

Not Technically. Its Flex Fuel. So you get what you get

[@Lil_Red_FA5]

In other words, buy a Ford

[@jesseguel741]

Congratulations you wasted your money lol 👍🏻

[@HighPSItv]

Thank you for your view and your comment. Money in my bank account 😁

[@ftex-rw2hm]

@@HighPSItv haha nice

[@willymay2064]

You should go watch these dudes down at the strip I live in archer lodge and accidentally found this video looking a turbo for my Tahoe.... go down to Benson if they are there you'll know it.... I think this is their slow soccer mom

[@joshbeall3350]

Still slow

[@amariodom4858]

like ur mom ha