ACE Header Independent Testing Results and Review - 199.6WHP on CA 91 Octane

[FunnyGopher]

Originally Posted by nikitopo

This is how our cars should be. You need to have a motive to rev this engine.

Oh, I have a motive now, and it's addicting.

[Kodename47]

Originally Posted by FunnyGopher

Hmmm, interesting. I don't know about the '17s. I have a '15, and the info I shared was the info Delicious shared with me. If you're pedal needs to be at 90% to be WOT, then I imagine the pedal scaling on the tune will feel right at home.

It varies with RPM. However 40% is an exaggeration, actual WOT won't be achieved until ~85% pedal. That's me just looking up the pedal mapping. However it's definitely not linear and at lower RPM you get more throttle angle per pedal degree.

[churchx]

Yes. Supposedly to make impression of more powerful engine.
But i guess that many tuning ecu also do throttle remap for easier fine throttle control, instead of it coming in fake lump as stock. Given that i often need to balance with throttle in mid curve understeer/oversteer bias, i'd rather prefer low & mid being not that progressive and often resorting to pulsating pedal instead of giving just enough for smoother control with such custom linear mapping.

[CSG Mike]

More independent results.



91 octane tune via CSG/DT.

Ace A/350 + Ace front pipe.

Same car, same dyno, w/out header w/out tune vs tuned w/ header + fp.

Car has a Grams 72mm throttle body and Skunk2 Powerbox CAI

*edit*

As always, ignore the numbers themselves, and look at the % gains. This dyno shows about a 20% gain in horsepower output. 184whp is very solid, when you consider that the stock baseline is 153whp.

*edit 2*

Car has a Grams 72mm throttle body and Skunk2 Powerbox CAI for both dynos.

[ThatAsianBradah]

Originally Posted by CSG Mike

More independent results.



91 octane tune via CSG/DT.

Ace A/350 + Ace front pipe.

Same car, same dyno, stock vs tuned w/ header + fp.

Everything 3k RPM and higher just looks amazing 👌 I'm especially impressed with 5.5k---->7500 RPM power with the A350 + Ace FP vs Stock. Pair this baby up with a P/D Supercharger and you got major torque and power all across the power band 😍👍

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[Chamaco]

Finally got mine 2 weeks ago and installed on Saturday. Will report back after I get it tuned.

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**Edit** don't know why the pictures were posted all screwy.

[bfrank1972]

Originally Posted by CSG Mike

More independent results.



91 octane tune via CSG/DT.

Ace A/350 + Ace front pipe.

Same car, same dyno, stock vs tuned w/ header + fp.

*edit*

As always, ignore the numbers themselves, and look at the % gains. This dyno shows about a 20% gain in horsepower output. 184whp is very solid, when you consider that the stock baseline is 153whp.

Sorry but this is misleading Mike - just confirmed with the original owner that the 'before' tune is a car with a stock tune, but bigger MAF and bigger airbox, which can cause issues with the stock tune.

I know dynos are relative but Just look at the *shape* of the curve past 6k on the 'before' graph - a 100% stock car does much better than that on the top end, and the point of falloff is well before a stock car hits peak HP. Comparing his un-tuned setup before to just about any decent header out there will show big gains.

That said, ACE is a great header for sure - look at that flat torque curve... but let's not use cars with tune issues as baseline comparisons and call them stock.

[nikitopo]

Where are these headers made?

[Tcoat]

Originally Posted by nikitopo

Where are these headers made?

Taiwan

[Lantanafrs2]

If the op had air "straightener" sleeve in the skunkbox it shouldn't hurt the performance on a stock tune imo. The delta would probably remain the same.

[CSG Mike]

Originally Posted by bfrank1972

Sorry but this is misleading Mike - just confirmed with the original owner that the 'before' tune is a car with a stock tune, but bigger MAF and bigger airbox, which can cause issues with the stock tune.

I know dynos are relative but Just look at the *shape* of the curve past 6k on the 'before' graph - a 100% stock car does much better than that on the top end, and the point of falloff is well before a stock car hits peak HP. Comparing his un-tuned setup before to just about any decent header out there will show big gains.

That said, ACE is a great header for sure - look at that flat torque curve... but let's not use cars with tune issues as baseline comparisons and call them stock.

I'm only reporting what I was told. Don't shoot the messenger. I have zero control over 3rd party results.

[FunnyGopher]

Originally Posted by bfrank1972

Sorry but this is misleading Mike - just confirmed with the original owner that the 'before' tune is a car with a stock tune, but bigger MAF and bigger airbox, which can cause issues with the stock tune.

It's not a larger MAF. Stock MAF and stock MAF housing size. In fact, Delicious told me the AFRs matched stock AFR levels extremely well, and only had to do a touch of MAF scaling with the new tune. What I mentioned in the other thread was that my guess (I'm not an expert, pls teach me) for the weird HP dip was the air velocity in the intake not being so great in the top end, because the piping after the MAF was so big. The actual MAF housing is stock sized.

Originally Posted by Lantanafrs2

If the op had air "straightener" sleeve in the skunkbox it shouldn't hurt the performance on a stock tune imo. The delta would probably remain the same.

This exactly, which is what Delicious also confirmed with me.

My guess is as good as anybody's though. It was either the massive intake piping, or the larger throttle body. Either way, the new tune is amazing.

[bfrank1972]

Originally Posted by FunnyGopher

It's not a larger MAF. Stock MAF and stock MAF housing size. In fact, Delicious told me the AFRs matched stock AFR levels extremely well, and only had to do a touch of MAF scaling with the new tune.



This exactly, which is what Delicious also confirmed with me.

Just look at your old top end, was not normal. Changing the intake definitely can throw your MAF scaling off. MAF scaling being off, load calculations will be off, cam timing/ignition timing/afr will be off. Could very much explain that curve - obviously I have no idea what Delicious did but I do know while your old bottom end looked ok, you were loosing a lot on your top end compared to a 100% stock car. Once tuned/rescaled, all that goes away plus the benefits of your new header so you're good to go. It's just not valid for indicating power gains an ace header will provide over a stock car, or even a tuned stock car. Just raising awareness and keeping it real, not trying to shoot the messenger Enjoy your new power

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[n0thing]

Is there any to gain with ACE FP (3" pipe & 2.5" flange) vs other aftermarket catless FP (2.5" pipe)?