I find it nowhere near foolproof - in fact, it's a terrible way to test. Yes, I had a 6spd and he was in a 5spd, but that would benefit ME. We were both in 3rd, and my 3rd winds out a lot faster. I also let off at my redline, since I was running out of gear and had no intention of continuing it in 4th. He still had good, usable power left in 3rd.

Many people claim gains like that with FMICs, but it's circumstantial. Maybe the guy was tuned to a level that caused knock and timing pulls, then he released that lost power. Maybe he had better conditions on the day of the dyno. Maybe a lot of things, but it is not normal for someone to just randomly gain that power on pump gas boost with the stock turbo. That one is cheap, because it's not as good, and even the good ones don't make much difference. There are tons and tons of people who put on an FMIC too early and don't make jack for power.

 

I fail to comprehend how that is possible. Better gearing and more power and you were side by side? Care to give some reasoning as to why it worked out that way?

You are entirely correct that the gains could've came from it being a different day, different conditions, etc.

Let me give you a little background on the car I'm comparing against. This car was tuned on the same day as me last August with essentially the same mods and put down 335whp. We were neck and neck. A few months later he puts on a TXS FMIC, gets a retune, gains 15whp and walks all over me. I add a bunch of mods, including the TXS FMIC and I fare the same fate.

As far as it being cheap and not as good...there's no evidence of this. Plenty of people have made good power with that one albeit it is not as popular as Buschur and AMS ones. Have you seen it in person? It has a nice sized core, excellent build quality and fitment. It retails for 600-650, the price difference is negligible vs. other comparably sized units...and I got mine for much cheaper.

 

Yes, I've seen it. It's mostly fool's gold. It looks nice, but that has nothing to do with how efficiently it cools the intake charge.

I can't explain why we were side-by-side that night. I can only explain the differences at the drag strip and at the dyno. The point is I made more power from 1st through 4th in a real racing situation. Also, a 15whp gain would not walk all over you. That's only a tenth in the 1/4 mile, which is a car length at most, and that's after a full 1/4 mile going through 4 gears. If he walked you, it would indicate a degradation in your car's performance more so than an increase in his...

 

I use the phrase walk all over me loosely. He pulled about a car on me, which seemed reasonable for the power he'd gained.

What proof do you have about its inefficiency? Because right now it's your word against mine, and I have more substantiation than you. It might be unscientific but it is logical.

 

i have done many roadraces cause we lack of a dyno and we measure our power gains racing cars but its foolish cause its never conclusive one day the outcome is different then the other day is some thing else, so if i were you i would go get a retune and there you will see the difference or it could be that you tested you car with mor gas or more people inside your car then his it could be a lot of things but dont worry just get a retune and you will see the real diff! good luck!

 

get a custom tune from dynoflash (big Al) and you will see more power and better driveability for sure.

 

Get A Tune!!!!!!!!!!!!!!!!!!

 

Did you enlarge the inlet of your intake manifold to accomidate the 65mm tb? if not, your wasting your time until you open that puuply up.

was it a 65 or 63mm you installed?

 

He has already changed his AFR so he has actually "retuned" his car. I doubt you will gain much by changing timing if you were tuned already. With the mods you installed AFR is the only thing really need to watch for.

You most likely have a boost leak somewhere.

 

if you haven't tweaked your tune then you are not realizing the new power. Get EvoScan and tune it yourself or let TT retune it if your not comfortable.

 

That's why I'm tending to ignore all these "RETUNE!!!!!" posts...

I added a good amount of fuel to richen up the curve to safe levels after the mods.

From what I've seen of other people's tuned timing maps, there doesn't seem to be a big difference after the big power adders on the stock turbo are out of the way.

Further I don't want to tweak timing on my own, especially without a dyno.

I'll have to do the boost leak test.

 

didn't touch the intake manifold

works doesn't say what the aperture TB opening is...

 

I would say the manifold and O2 would affect the tune. I would get a custom tune. PM me for an idea I have.