Near Stock v. OFT Stage 2 Dyno
 

Just reporting the results of some dyno testing.

Runs 1 & 2 were with:
- stock tune
- Perrin non-resonated CBE

Runs 4 & 5 were with:
- OFT Stage 2
- JDL catless UEL header
- JDL overpipe
- Magnaflow catted/resonated FP
- Perrin resonated CBE
- K&N drop-in

https://farm6.staticflickr.com/5610/...ec4fda8f_b.jpg

The baseline runs were really promising, making 177 whp with just an exhaust. (I was told stock cars usually dyno around 165 whp on this dyno, so maybe all the track days broke in the engine well.) But the stage 2 runs were disappointing, making only 178 whp.

One thing to note: We literally installed the parts and put it straight on the dyno, so not sure if the ECU needs time to adapt maybe? @Shiv@Openflash

Or the exhaust components need time to break in, not sure. Or perhaps the coolant temps dropped out of optimal. There's a lot of possible explanations, so probably best not to jump to conclusions yet.

The good thing is it sounds amazing. I was worried about how loud it would be, but it's actually pretty tame. Slightly louder than before, but with a muted rumble to the sound. I've been driving around the past few days just listening to the exhaust purr. :D

I'm going to take the car to the track this weekend and properly put it through its paces.

Most definitely needs time to adjust after a flash.

not really likely that all of those mods only added 2 hp

Give the car 100 miles to learn the fuel trims etc, then dyno again.

I just recently got the OFT and def give it some more time to learn. I flashed before starting my 6 hour drive and thought hmm this is nice. Two hours later I was like F*ck Yeah :burnrubber:

177 is the highest ive seen for a stock car. Not believing you only gain 2hps.

And you should get E85 in there, if you have access to it:thumbup:

Have you tried getting a real tune specifically for your mods? You will see much better gains for sure..
Generic tunes are always going to be conservative and not be able to take full advantage of mods, that's just there nature.

Also, take actual numbers (IE the 177rwhp starting point) with a grain of salt, every dyno will read differently and vary day to day. The same car could make 155hp on one dyno and 175hp on a different dyno a week later. The 4000rpm area looks to have seen some gains at least..

To the OP, the ECU definitely needs time to learn.

The actual numbers really don't matter, just the relative change.

Just curious if this was this Brady's dyno at Pure Automotive Performance? If so, I'd definitely agree that the track days can help break the engine in. I dyno'd there at 181whp with stock tune, stock exhuast, and just a K&N drop in filter. Conditions were pretty much ideal that time (cool November air, much like your dyno was, I'd imagine). Dyno'd again earlier this summer when I got a tune under more humid conditions and only got 177whp stock, 185whp tuned (Delicious Tuning, still stock exhaust).

That's disappointing about only getting 2whp out of the tune and exhaust mods. I'm planning on doing similar mods this winter and hoping to get up around 200whp, but we'll have to see. Hopefully giving the car a chance to learn it will pick up some more power.

Also, you said you are taking it to the track this weekend. Are you the other FR-S signed up for Summit Point Main with NASA Mid Atlantic? If so, I'll see you there. I'll be running in Time Trials.

I believe OFT stage 1 alone adds 3-5hp to bone stock cars so I would be disappointed too.

Give the ECU time to adjust?????

Isnt the point of a tune to change your ECU to work with the mods???????????

I'd be freaking pissed and demand a refund if a stage 2 tune gave me 3 whp with that list of mods.
No waiting on a ECU learning period, something is wrong with that tune.

Give the ECU time to adjust?????

Isnt the point of a tune to change your ECU to work with the mods???????????

I'd be freaking pissed and demand a refund if a stage 2 tune gave me 3 whp with that list of mods.
No waiting on a ECU learning period, something is wrong with that tune.

If you're WOT it's closed loop

Sent from my OnePlus One

Lol... So much butt is hurt in this thread its hilarious....

Why would you not contact Shiv before doing anything else? I would have called him from the Dyno. He stands behind what he does and will sort this out, but at least give the guy a chance before you make a public thread bashing his livelihood.... Damn.

Also, the area under the curve looks like you picked up good power to me.

Some good comments on here. One thing I want to caution is not to jump to conclusions too early. The car went straight from lift to dyno and the engine hadn't been run in about 2-3 hrs. Could be a number of explanations, which I'm hoping Shiv or other tuners can shed some light on.

Yeah I was a bit disappointed, was expecting to see 10-15 whp gain at least. It's cool though, just hoping it's a fluke and now trying to figure out what's going on.

Yeah I'll probably re-dyno after my track days this weekend. Not fun having to spend money for another dyno session, but would rather know for certain what's going on. I will say, the butt dyno feels like there were some gains in the top end at least.

Also 177 whp is pretty high for sure, but it was repeatable. Looks like ja1217 was saying he dyno'd at 181. I think these engines gain a decent amount of power after breaking in at the track.

Yeah custom tune will be my next step if I don't see any improvement on the next dyno. I might just have the unlucky combination of engine/parts that doesn't match well with OFT.

Yep will shoot you a PM.

Thanks, that makes me wonder if it had to do with coolant temperature then.