740 Turbo Brick

iTrader: (2)

Well I had a whole story written out but the forum decided I should be logged out while trying to post it and I lost it. Condensed version it is then.

03 Evo GSR
120k on stock drivetrain besides rebuilt trans
Evo 9 10.5/20G Turbo
MBC at 26 psi
Tubular exhaust manifold
Open 02 Dump
3" Turbo Back exhaust, No Cat
Injen Intake/Intercooler piping
3" core intercooler
Water/Meth injection, mainly just to cool it down
BC 272 cams
HKS BOV
ACT XTSS Clutch, slave restrictor removed

Based on these mods the previous owner had an E-tune flashed in, It has never been on a set of rollers.

In the course of 10 runs at my local track last night I ran multiple 12.6 and 2 12.5 passes. Ive raced FWD for 6 years, this is my first year AWD, so I do have track experience. My best pass was as follows:

2 Step set at 6500 rpm, moving smooth and fast off the line and slight wheel spin mid launch. Normal 1-2 shift, No lift 2-3 and 3-4, crossing the trap almost redline in 4th.

60 ft - 1.730
330 ft - 5.156
1/8 ET - 8.021@86.52
1000 ft - 10.496
1/4 ET - 12.567@106.78

Im hitting consistent 12.6 runs and 1.7-1.8 60 fts, so I think I have the launch down, shifting as fast as I can and not losing boost, So it seems to me if I want to go faster its going to start costing me money. Any input on my time, or things I can try to improve it? I mean mid 12s are fast but I sure would like to be in the 11s at least.

Bmurray

iTrader: (5)

your trap speed seems extremely low, does it not..?

icole

Trap speed seems low for those mods. I'd get a tune. My car is stock except tbe. No boost control, just a tune. I ran the 1/4 once I didn't launch just street start but I did 14.0 at 106 mph.

740 Turbo Brick

iTrader: (2)

Well thats kind of a good thing isnt it? Faster ET with a lower MPH? That run I raced a VW that ran a 13.0 at 110. FWD, lots of spinning.

I agree completely though, the Email tune helps but it really needs put on a Dyno and someone actually tune the timing and fuel maps to my mods. At 6500 rpm my boost is down to 20-21 psi and my AFR is 10.8 ish. So there is room to lean it out, and Im still on the stock 520cc injectors with it that rich.

Bmurray

iTrader: (5)

No.. opposite. If your ET is bad but your mph is great then that means the car is making the power it should be, just need to work on driving skills. Yours is the other way around. You have some power issues because stock 350zs (i come from the z community) trap 106mph (250whp)

740 Turbo Brick

iTrader: (2)

So you think my driving is decent but my car probably needs, at the least, a dyno tune from someone who knows evos?

YFZracer32

iTrader: (1)

What kind of power are you making? I went 12.0 @112 with less mods then you have, making 370 to wheels. I would go for a retune.

740 Turbo Brick

iTrader: (2)

No clue on power, If I had to guess Id say MAYBE 300 to the wheels. I completely agree, it needs an actual dyno tune. All it has right now is an email tune the previous owner flashed in, the told a tuner what mods were done and they sent him a file based on similarly tuned evos. So Im sure there is much room for improvement. But before I go to get tuned Im probably going to take out the BC cams and get some GSC S2s to make it worth my money to get tuned.

lostsoulsevo

iTrader: (10)

I disagree, having a good et with a low trap speed is great! But it could be a cause of numerous of reasons. Weight reduction, good driver, shift points etc. 12.5 @ 105 is pretty impressive. A lot of evos I've seen running mid 12's trap between 110-112. Only suggestion I have is; get some good 26" drag radials and improve your 60ft. I think you'll be able to get a low 12.

lostsoulsevo

iTrader: (10)

Also when are you shifting? And what is your rev limit set at? You shouldn't even be close to revving out in 4th gear at 106mph. Do you have a 5spd trans?

740 Turbo Brick

iTrader: (2)

Yes 5 spd, rev limit set at 7800, And Im shifting between 7500 and 7800, before it hits the limiter. Im shifting earlier to 2nd, and no lifting to 3rd and 4th. It might not be that close to rev limiter in 4th when I hit the traps, but it seems like it was.

lostsoulsevo

iTrader: (10)

7500-7800 in my opinion is to high for shifting. Try shifting at 7000-7200. I make more power on a fp black on stock block and I shift at 7500-7800.

ZanarkO

iTrader: (10)

the problem your having is those **** cams GET RID OF THEM NOW FOR ANYTHING ELSE. Brian crower is worthless garbage. Get new cams get a retune at 28psi get you some head studs and run 11s /thread

CurseDSM

iTrader: (3)

Don't forget the intake pipe and ic pipes as well, along with the bov. Change all that and watch it wake up some.

740 Turbo Brick

iTrader: (2)

Lol yeah my plan is to get GSC S2s. The previous owner didnt know about Brian Crower cams until after he already put them in and saw the AMS cam test. So cams and a dyno tune are in the near future plans.

Whats wrong with injen intercooler/intake pipes? They seem to be quite popular and its just a hard intercooler pipe, I didnt think you could mess up intercooler piping. Also I have no driveability, fuel mileage, or performance differences between using the BOV or using a Forge recirc valve. Ill probably just leave those alone for now and put money towards the cams and tune