I was tuned at 333whp last August with GSC 272 Cams, 3" TBE, MBC, Walbro FP, Helix Intake.

Since then I have added: Forge DV, TurboXS FMIC, LPI LICP, Works Aperture TB, ported exhaust manifold, ported hotside, Ebay 02 housing.

I've had to richen up my A/Fs but my car still loses by the same amount against a friend's Evo as it did before the mods. Best part is that my friend's car has less mods than me

I didn't think these mods really needed a retune? What gives?

 

I would think you need to have custom tune again. It's hard to say without the logs. But, I see that you added FMIC to add efficiency of interncooling which can be utilized by running more aggresive timing. I also see that you further improved flow of the exhaust by adding O2 housing and porting. I think you could run a little more boost up top, without knowing how much your boost is currently. But I suppose the top end could be better than before.

Either way, you have nice combination of mod on your EVO... I would get a custume tune. Might as well get the Alcohol/Water injection to further max out the capability with current setup...

Dan.

 

You will have to tune again to see the power IMO.

 

who yuned you originally?

 

definatley need another tune

 

Add some timing my friend!

 

Boost leak?

 

Originally tuned by TurboTrix. Then added fuel via ECUflash myself. I don't feel I am comfortable enough with tuning to adjust timing on my own, especially without a dyno at my disposal.

 

when will they learn.

 

You do know that richer = slower right? The leaner you run, the more hp you make, but the more chance of detonation. Its finding that happy medium for your car with timing and fuel to keep your afr's around 11's or so. Dumping more fuel into the motor doesnt make more power. Quite the opposite actually.

 

Uh, yes, I know this.

I have the AFR's tapering to 11.0 to 11.2 at the top of 4th gear.

 

Oh please, I think you could be one of the least qualified people on this forum to make that statement.

To the other posters:

My car seems to be 25-35whp down vs. what I'd expect. I highly doubt I'd pick up that much power from timing tweaks

 

definately check for boost leak then a retune!

 

Anja, 3 things:

1) Yes, you 100% need a retune to make full use of all those mods - good Lord, that's a lot of mods at once.

2) Several of those don't even really help or make power, such as the Forge DV (it's especially not good if that's the old direct replacement fluttermaster, but if it's the Forge RS, then it's great), the TXS FMIC, the Works TB (what possessed you to get this?). However, the o2/manifold/hotside with porting/coating should add some power, and the LICP is usually a good mod, but the generic LPI wouldn't be my first choice, so not sure how much power that would make. You get the most gains from the ported stuff with a retune and boost tweak, because they allow for more timing/boost at a given octane.

3) Basing your lack of gains off how you compare to another car on a street pull is very, very misleading. YOu absolutely have to test it on the drag strip or dyno to verify gains, or lack thereof. I've run side-by-side with a car making 40whp less than I when doing 3rd gear pulls back-to-back. However, I outran him by .6-.7s at the drag strip and about 6mph...

 

The mods were acquired over the course of the past year...haha, they weren't all at once.

I realize that some don't help but I figured I'd list them regardless. The Forge DV is the old one but I don't have any problems with it fluttering. If anything it holds boost a lot better than the plastic stocker. The TXS FMIC I've seen gain ~15whp on a friends car with the same mods, and it was for a great price. The Works TB I picked up for essentially nothing.

That makes no sense how you'd be side by side with a car down 40whp. I'm guessing you weren't in the same gear or your gear ratio was different if you were racing a 5spd. I've found the side by side comparison pretty foolproof