[KingLT1]

Automatic cars with flex fuel, headers, lt2 manifold, 95mm tb, rotofab generally make around 470whp on E85. They baseline around 390whp. That is roughly +80whp gain from all those mods which is still pretty good.

[FH212]

Originally Posted by KingLT1

Automatic cars with flex fuel, headers, lt2 manifold, 95mm tb, rotofab generally make around 470whp on E85. They baseline around 390whp. That is roughly +80whp gain from all those mods which is still pretty good.

How much of a HP gain is from the flex fuel alone? Just curious what to expect if I do the all those mods minus the flex fuel since its not that available in my area

[GreyGhost702]

Originally Posted by FH212

How much of a HP gain is from the flex fuel alone? Just curious what to expect if I do the all those mods minus the flex fuel since its not that available in my area

I think 15-25whp would be a fair account of E85.

[s346k]

my car made 22 whp more on ethanol. its not about the gain in number on a sheet of paper. after driving them back to back i refused to use 93 octane unless the car was going up for the winter. ethanol drives/feels/runs so much better.

[KingLT1]

Originally Posted by FH212

How much of a HP gain is from the flex fuel alone? Just curious what to expect if I do the all those mods minus the flex fuel since its not that available in my area

Normally 20-25whp but it depends on the amount of ethanol in the fuel. Full E85 25whp, E60 20whp, E40 15whp. Most pump E lands between 66-78%. The benefits of E85 aren't all about peak HP gains either. See ethanol likes heat, so you will have much more consistent performance pushing the car hard in the hottest of summer days.

Ethanol does not burn as efficient when cold. Fuel stations drop the E content back into the 60% range during the cold season, so vehicles start easier and run better until up to temp.

[FH212]

Originally Posted by KingLT1

Normally 20-25whp but it depends on the amount of ethanol in the fuel. Full E85 25whp, E60 20whp, E40 15whp. Most pump E lands between 66-78%. The benefits of E85 aren't all about peak HP gains either. See ethanol likes heat, so you will have much more consistent performance pushing the car hard in the hottest of summer days.

Ethanol does not burn as efficient when cold. Fuel stations drop the E content back into the 60% range during the cold season, so vehicles start easier and run better until up to temp.

Thank you. That is good info!

[DEV1LE]

Originally Posted by SSShark

I just tuned my car. Baseline hp on the dyno was 391. I got a 44 whp bump with headers/cats/Rotofab and e50. To get a 80 whp with just those simple bolt ones is very impressive!

I have the same 2023 1SS 1LE A10 and with Hooker Blackheart headers, K&N Blackhawk CAI, and AWE 3” catless mids and X pipe (keeping stock NPP muffler) I’m supposedly looking at 50-60 WHP gain and 60-70 lbs tq on 94 pump gas. Haven’t dyno’d to confirm. Roughly $2,500 CAD. Not too bad IMO.
Btw How did you tune it? Aftermarket? Plug in etc?? I have no clue what I’m doing with regards to tuning lol

[Joshinator99]

Originally Posted by DEV1LE

I have the same 2023 1SS 1LE A10 and with Hooker Blackheart headers, K&N Blackhawk CAI, and AWE 3” catless mids and X pipe (keeping stock NPP muffler) I’m supposedly looking at 50-60 WHP gain and 60-70 lbs tq on 94 pump gas. Haven’t dyno’d to confirm. Roughly $2,500 CAD. Not too bad IMO.
Btw How did you tune it? Aftermarket? Plug in etc?? I have no clue what I’m doing with regards to tuning lol

Nope, you didn’t gain 50-60 WHP lol…maybe half if it’s a happy dyno and that’s tuned! I’d highly suggest you find a good tuner. Remote is fine for what you’ve done for mods… connect with Megahurtz or KingLT1 on this board.

[SSShark]

Originally Posted by DEV1LE

I have the same 2023 1SS 1LE A10 and with Hooker Blackheart headers, K&N Blackhawk CAI, and AWE 3” catless mids and X pipe (keeping stock NPP muffler) I’m supposedly looking at 50-60 WHP gain and 60-70 lbs tq on 94 pump gas. Haven’t dyno’d to confirm. Roughly $2,500 CAD. Not too bad IMO.
Btw How did you tune it? Aftermarket? Plug in etc?? I have no clue what I’m doing with regards to tuning lol

Unfortunately, chasing horsepower in South Florida is a very expensive endeavor. I will say that my numbers are pretty tame compared to what your proposing. I would've been ecstatic had I gotten a 50-60 hp bump with my mods. After the holidays, I plan on installing either the MSD or LT2 intake along with a 95mm tb. Not sure which combo yet. Hopefully I can get another 15-20hp or so.
My car was remote tuned and then dyno'd. These were the numbers.

Base 391/405
93 415/446
E50 435/467

[Need4Camaro]

Originally Posted by Joshinator99

E85 on a stock LT1 is good for 15-20 WHP and LT2 intake is similar. You might see some variances depending on dyno runs here and there but you’ll never see the better part of 100 HP from those two mods.

E85 is great and will shine in letting you keep full power even when it’s hot out or you hot lap the car, so that’s the big benefit on a stock LT1. On a stock LT4 that becomes even more important. As you turn up the power the E85 cooling & octane is a lifesaver. When I was making a couple of hundred HP less, I dynoed my car on straight 93 and got 837 WHP. We put it to E50 and went to 927 WHP with no other changes. At my current power level I suspect it’s over 100 WHP difference.

I guess I would need more clarification on what you consider stock. Stock Intake (CAI) and Stock Headers / Exhaust? Or only Stock motor and internals?

My CAI, Headers+Full Exhaust, E85 Tune SS put down 480 at the first dyno and 500 at another dyno after retuning. I'm currently putting down somewhere ~ 450 - 460WHP on 93 octane.

I may have a freak car or a really good tuner but it seems that E85 really wakes these cars up. Although I will agree E85 alone will not be enough to get you there. It still seems like a pretty big jump compared to the investment.

[Joshinator99]

Originally Posted by Need4Camaro

I guess I would need more clarification on what you consider stock. Stock Intake (CAI) and Stock Headers / Exhaust? Or only Stock motor and internals?

My CAI, Headers+Full Exhaust, E85 Tune SS put down 480 at the first dyno and 500 at another dyno after retuning. I'm currently putting down somewhere ~ 450 - 460WHP on 93 octane.

I may have a freak car or a really good tuner but it seems that E85 really wakes these cars up. Although I will agree E85 alone will not be enough to get you there. It still seems like a pretty big jump compared to the investment.

I’m guessing that’s a Dynojet…? What did you dyno stock *on that exact dyno*? Most SS autos are in the 390-400 WHP stock so you didn’t gain 100 WHP from E85 and headers in my humble opinion.

[KingLT1]

Originally Posted by Need4Camaro

I guess I would need more clarification on what you consider stock. Stock Intake (CAI) and Stock Headers / Exhaust? Or only Stock motor and internals?

My CAI, Headers+Full Exhaust, E85 Tune SS put down 480 at the first dyno and 500 at another dyno after retuning. I'm currently putting down somewhere ~ 450 - 460WHP on 93 octane.

I may have a freak car or a really good tuner but it seems that E85 really wakes these cars up. Although I will agree E85 alone will not be enough to get you there. It still seems like a pretty big jump compared to the investment.

Your car likely would have baselined high to hit that number. Just like Race Proven Motorsports dyno reads high. They know it and don't care because they always base line before modding and compare the gains. These cars also do not pickup 40-50whp on E85 NA with basic bolt-ons. If it was a radical NA combo with crazy compression or boost, then yeah.

[SSShark]

Originally Posted by KingLT1

Your car likely would have baselined high to hit that number. Just like Race Proven Motorsports dyno reads high. They know it and don't care because they always base line before modding and compare the gains. These cars also do not pickup 40-50whp on E85 NA with basic bolt-ons. If it was a radical NA combo with crazy compression or boost, then yeah.

Hey KingLT1, question for you. I'm about to install an an LT2 non ported intake with a 95mm tb. Based on my setup and numbers from a couple of posts up, what kind of gains would you say that I can realistically expect?

Edit: Might also add a UD pulley.

[GreyGhost702]

Originally Posted by Need4Camaro

I guess I would need more clarification on what you consider stock. Stock Intake (CAI) and Stock Headers / Exhaust? Or only Stock motor and internals?

Most consider the term "stock" to be, from the factory without any modification. While SBE gets blurry, typically refers to the rotating assembly being stock (rods/pistons/crank) but one could be cammed and SBE, as a cam is widely considered to be a "bolt-on" part. It's a little more tricky, because you can swap the camshaft even in a LT engine without removing the heads, or dropping the oil pan. For a 6th gen, it sure is a PITFA.

I think Rotofab claims up to 15whp from stock with their intake and I haven't seen exhaust manufacturers advertise power gain claims much but on an otherwise stock LT1 I think long tubes could be worth 15-30whp. Everything after the headers is purely noise. There's nothing to be gained in pipes or mufflers over the factory setup really, if you're not pumping more air into them beyond their capacity. And the only way you're going to pump more timing into the tune is by adding octane and/or cooling the combustion event. Both, E85 does very well. Beyond that, whatever numbers show up on the dyno screen are what that dyno equipment recorded. One can only speculate as to the dyno equipment calibration and software settings. Anything other than a 1:1 gear ratio could affect results as well I suppose.

We can debate whether someone's car "actually" makes a number, but it usually just results in hurt feelings. If you baseline a car and do the mods & tune on the same dyno, preferably same day, there's almost no arguing with the results. But these cars have been out for years, baseline averages and average gains from various parts and combos documented for years. Results outside of these norms always get a raised eyebrow.

While the power badge is fun, I think it's seconds we really want;
- Will it make the car faster or stronger? (Because supporting mods are important, too.)
- Does the $ per smile ratio fit the budget? (Because it's hard to spend $1500+ on mufflers that make the car louder but not faster.)