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Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain.


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Old 05-29-2019, 03:27 PM   #15
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Originally Posted by reeves View Post
I've driven 86's with the Ace, JDL, and P&L.. can't go wrong with any of them. Unless you're looking to shave as many tenths of a second off your lap time, I wouldn't get so caught up in the "highest" torque numbers.. Those 3 will all give you a flat torque curve if tuned right. Just pick any of them and see which one you can get at the lowest price.

Dyno sheets may have slightly different results, but you can't really 'feel' a difference between a few lb-ft on a flat torque curve. They're all "great" headers that will make a night-n-day driving difference (vs. stock) after you tune it.
This is the critical statement! Even the stock parts can give you more torque on a flatter curve with a decent tune. There are no magic bolt on parts that are going to give even minor increases without a tune.
I know the OP understands that but it bears pointing out for others that read this.
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Old 05-29-2019, 04:40 PM   #16
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No delicious, no header, no flex feul. Put all that money toward a JRSC & dyno. Headers are like + or - 5 whp. 5-6 grand u could be boosted with +50% whp. How much it header and tune and all that going to cost and for what 10 hp?
bottom = stock 17
middle = Ace + tune
top = Ace + tune + flex

No other powertrain mods.




Half the gains of a SC, for half the price, with none of the complexity.

One is shoving air into an engine and increasing stress. The other is increasing efficiency.

The best part, is that the two can, and is often, stacked together for even more gains.
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Old 05-29-2019, 04:57 PM   #17
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On our PTUNING 4-1 Header we regularly see approximately 200WHP. This is a customers car that is bone stock with just our header and an Ecutek dyno tune
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Old 05-29-2019, 05:19 PM   #18
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@CSG Mike

Thanks for your input. Those are big gains, Im assuming from an ACE 350? Call me picky, but the dip is still between 3500-4500. About 8ftlbs. Could it be possible to tune 150+ from 3500-5000 and level the HP from 6000-7000? Peak at 185HP? (93 pump) I dont know the limitations of tuning and how malleable those lines are. Or are these questions for the guy with a laptop?
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Old 05-29-2019, 06:27 PM   #19
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@CSG Mike

Thanks for your input. Those are big gains, Im assuming from an ACE 350? Call me picky, but the dip is still between 3500-4500. About 8ftlbs. Could it be possible to tune 150+ from 3500-5000 and level the HP from 6000-7000? Peak at 185HP? (93 pump) I dont know the limitations of tuning and how malleable those lines are. Or are these questions for the guy with a laptop?
Not sure what you are asking. You want less power but flat? You could always pull timing and or add fuel to make less power in spots to flatten everything at a lower number. Not sure the point of that.

At any speed above 20mph at WOT you should never really be under 5,000rpm just downshift. Low end is either getting off the line in 1st. Or daily driving and that torque curve would pretty much be best as far as headers go for either scenario.
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Old 05-29-2019, 06:28 PM   #20
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On our PTUNING 4-1 Header we regularly see approximately 200WHP. This is a customers car that is bone stock with just our header and an Ecutek dyno tune
Pretty solid, nice top end. Do you have the stock baseline for that car?
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Old 05-29-2019, 09:17 PM   #21
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Pretty solid, nice top end. Do you have the stock baseline for that car?
I do not for that particular vehicle, but on our Dyno Dynamics we usually see around 160-165WHP on a bone stock car.
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Old 05-29-2019, 09:45 PM   #22
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Quote:
Originally Posted by Westen86 View Post
@CSG Mike

Thanks for your input. Those are big gains, Im assuming from an ACE 350? Call me picky, but the dip is still between 3500-4500. About 8ftlbs. Could it be possible to tune 150+ from 3500-5000 and level the HP from 6000-7000? Peak at 185HP? (93 pump) I dont know the limitations of tuning and how malleable those lines are. Or are these questions for the guy with a laptop?
Um... So the bump where stock is the worst bothers you?

N/A is never smooth if fully optimized. I'm sure they'd happily flatten that bump for you, but then you miss on the peak gains (61ft/lbs on e85... at 4700rpm where you'll love it). Note it's again about the same above that bump. So not a dip anywhere, just a couple peaks, likely due to the tuning frequencies of the header.

That is the Ace 350 I believe, and its the best midrange gains easy to find any more. There are headers (including from Ace) with better peak power but lower gains down low.

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Old 05-30-2019, 02:59 AM   #23
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@CSG Mike

Thanks for your input. Those are big gains, Im assuming from an ACE 350? Call me picky, but the dip is still between 3500-4500. About 8ftlbs. Could it be possible to tune 150+ from 3500-5000 and level the HP from 6000-7000? Peak at 185HP? (93 pump) I dont know the limitations of tuning and how malleable those lines are. Or are these questions for the guy with a laptop?
That is indeed the A350.

Also, the gas tunes are on ACN91, so you can expect better results on non-AC91, and even higher results on 93.

Power can always be detuned to be flat, and detuning is done quite often when tuning race cars that want a specific power-weight ratio, where powerband is not mandated.
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Old 05-30-2019, 05:21 AM   #24
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how are dynos in USA always put crazy values
when we in italy almost every dyno put around 133whp bone stock with 100Ron and you are lucky to get 160 whp with a catless EL header with 100Ron ecutek tuned
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Old 05-30-2019, 05:41 AM   #25
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Decat OEM header with catless 2.5" exhaust, 98ron

Everyone has a dyno plot

Don't sweat the peak

Oh, and...
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Old 05-30-2019, 07:26 AM   #26
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honestly choose between Ace & Ptuning. Those are the best options, and don't expect a "flat" torque curve, those only happen with forced induction. If you can take a trip to have one of the other dyno tuned, that is the one you should choose.
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Old 05-30-2019, 08:47 AM   #27
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honestly choose between Ace & Ptuning. Those are the best options, and don't expect a "flat" torque curve, those only happen with forced induction. If you can take a trip to have one of the other dyno tuned, that is the one you should choose.
If you are interested in a PTUNING header then we do have a group buy currently going on. PM me for more details
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Old 05-30-2019, 09:29 AM   #28
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I pictured tuning like moving a tent post under a tent. If you moved the peak, the immediate area around it would tapper off each end. But I guess thats a camshaft thing? But from what I hear, tuning is about pushing each peg as far up as possible without the peg getting pushed out. And the total engine determines the length of each peg.

Then Im looking for 150ftlbs from 3-5000rpm on 93. Kinda like this. And Im pretty sure thats all down to which header I put on.

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Last edited by Westen86; 05-30-2019 at 09:39 AM.
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