`sl!mXP

My car:
93 FD go fast mods=
Streetport
non-sequential rebuilt twins
Bonez DP, midpipe, exhaust
k+n intake
custom short throw
apex'i PFC
unorthodox pulley
upgraded fuel injectors (1250 850)
M2 large smic
ACT flywheel
ebay bov (i know i know)
Homemade boost controller (in question!!)

My friends SRT-4
AEM Drop In Cone Filter
Mopar Short Throw Shifter
Mopar Blue Plate of Death
Prothane Race Motor Mount Inserts


Saw superman movie tonight (awesome btw) with a good friend of mine who has an 05 srt-4 and we got a couple races in on the way home. Most of the races were in 3rd or 4th gears on. I could never really take him - he would just be even with me gaining by inches. Each pull was the same we were cruising at ~70 mph id downshift and he would instantly match me. Neither of us would pull on each other and my car ran very choppy at WOT with 10psi. For the most part we were even but I managed to squeeze out a few inches on him. But with my mods I thought I would omgwtfbbq pwn his face. This did not happen. For the most part our cars were even.

We raced once from a 2nd gear pull, I won this one a little more soundly but again not by anywhere near the margin I was expecting.

Now I know my car is not tuned perfectly, I took it to rx7store last summer and it put down roughly 255whp at 10psi (mustang dyno) but it runs super choppy at WOT. Further my boost controller couldnt hold anything above 10psi (homedepot thx a lot) and so there was no tuning session for high boost. Now I'm wondering what can I do to get this fixed, I believed I should have stomped this SRT-4 at 10psi not just barely eeked out a few inches.

Is the srt-4 really this fast? I thought for sure I could curb stomp him

FourtyOunce

iTrader: (15)

What fuel were you tuned for? Being that it was tuned last summer, you probably weren't tuned for the 10% ethanol mix that is pretty much the norm at most gas stations. You should check your A/F ratios with a wideband and see where you stand.

With the SRT4, they are pretty fast, and can get even faster with some Mopar bolt ons. With your mods, you "should" be pulling a little bit in front ....

Improved FD

gee, I wonder

get a wideband and get the car tuned right

Upgrayedd

iTrader: (1)

Ummm NO they aren't really that fast! What Stage is the SRT-4? I have raced Stage 1 and 2 SRT-4's on the freeway and from a dig when all I had was DP and CB I beat them every time.... How are you only putting down 255 whp with those mods?! Something must be wrong with your tuning, but I question myself saying that if you had it tuned at rx7store..... Something is NOT right! You should be able to absolutely DEMOLISH an SRT 4 with the mods as you have listed there.... Check my sig for my current mods and I should be putting down close to 350whp when I have it re-tuned and dynoed this summer.

For reference I was dead even with a brand new C6 Z06 Corvette on Saturday from a dig... You should be stomping the SRT4

`sl!mXP

I was hoping they would have done that :\

Improved FD

SRT4s put down about 240-260 at the wheels with a few mods I think...they aren't totally slow, either

Stix37867

iTrader: (1)

Sounds like you need a better tune. You should be have a lot more hp than 255. More like 325ish with a good tune.

Improved FD

http://www.prnewswire.com/cgi-bin/st...2171026&EDATE=

Upgrayedd

iTrader: (1)

Stage 2 puts down 252 whp STOCK... Dyno proven and I have seen it with my own eyes! Listed from factory as 238hp at the crank.....

Improved FD

yep, some of these cars are underrated from the factory...Cobalt SS, too

Improved FD

just fyi, this thread should be in the "kills" sub-forum

DocMazda

with those mods, you should be putting about the 350+hp ballpark. you need to tune your car and get a wideband. i have a friend that ran non-seq. twins and had it tuned for about 350rwhp. he blew his motor and is about to start it up with a streetport and a tune by steve kan. you should really look into the tuning of the vehicle.

Improved FD

BDC will be in NC in mid July

come on down and join the party

xblazinlv

SRT4's are no joke, especially from a roll.

Most of the guys in town I know with SRT4's are into the 12's with a few bolt ons and slicks. There is a guy out here with a 500+ HP SRT4 who is running 11.8 spinning on slicks. He traps like 123 or something like that. They are not to be taken lightly for the most part, unless they are stock.

`sl!mXP

the thing I dont understand is that I did have the car tuned. It was tuned by rx7store for that hp. I have the dyno and the receipt. I havent touched the car since it got tuned other then throwing a midpipe on and I havent driven it more then 1000 miles since then either.

/sadface

Improved FD

there must be more to it than that

perhaps Jason will chime in....255 is pitiful for your mod list....worst I've ever seen I believe

xblazinlv

Yea I would think you'd be over or around 300HP at 10psi with your mod list. Maybe Jason tuned it rich for safety? I also noticed you were on a mustang dyno, so I'm sure that had quite a bit to do with it as well.


One of my friend's WRX's just put down 248 at the wheels on a Mustang dyno this last week, and yesterday went on a Dynojet and put down 275. That's a big difference in numbers

`sl!mXP

Yeah I'm well aware now that the numbers are off, but I kept hoping that it was just because of low boost or my manual boost controller being unable to hold anything above 10psi.
The guys at rx7store told me to come back when I got a midpipe and an ebc to get it retuned at high boost - but they told me that they are in the process of moving and have already dissasembled their dyno :\

*edit
-The car is definetly running rich. It was running pig rich when I took it to them in the first place, however it still runs super rich. They said they leaned it out a heck of a lot but if you place your hand behind my exhaust it will turn black after a minute.

obviously getting a retune is a high priority here - but I figured getting it tuned last summer would last me for a long time (The car is only driven 3 months a year!) Unfortunately I was wrong :\

lotta-boost

Ya I agree that your nombers are a little low even for a mustang dyno, I have almost the same set up and I put down 310 on a mustang dyno and 360ish dynojet, but I also have a SRT-4(the wife's car) and I have stage 1 ecu, WG(set to 19psi), big FMIC, CAI, and full turbo back(her car dynoed 280hp and 305lbs), and every time we race I always destroy her. Check for boost leaks as well as a retune, once we raced and I blew the hot side IC hose off and you could not tell unless you looked real close. That time she took me, never lived it down. Shitty part is I thought a car that I tuned beat a car with way more money and a tune from Steve Kan.

s-thetikz

iTrader: (1)

get your car checked out. something seems off

Mahjik

iTrader: (1)

I would guess the tune needs to be worked on a little more. People have put down around 265rwhp at 10 PSI using the stock ECU and all the bolt-ons.

If you are trying to race a modified SRT-4 at 10 PSI, then yes you aren't going to just pull away from them. If you are racing at a higher boost level then 10 PSI, you need more tuning help.

deez-nuts-77

iTrader: (8)

srts are pretty damn quick for what they are. my buddy had one, all he had done to it was a turbo back exhaust, mbc, and a better wastegate actuator, and running only 1psi over stock. he ended up running an 8.5 sec pass at the local 1/8 mile track (should be good for a mid 13 1/4 mile time).

GoodfellaFD3S

iTrader: (213)

"throwing on a midpipe" lol!!! dude, that is one of the mods that most definitely requires a retune. You just removed an airflow bottleneck (a cat). If you have a stock w/g and you are only seeing 10 psi with open exhaust your turbos may be weak. How many miles on them?

Also, I recommend changing your plugs/plug wires/fuel filter if they haven't been done recently.

RX7JCHIII

I agree.....switching to a mid pipe would throw off your tune I would think.....A mid pipe is a mod that frees up a lot of air flow.....

YELLOWGSLSE

iTrader: (7)

WOW. How long were you even with the C6 Z06?? Have you done any other mods to reduce weight? I thought it took a lot more than 350whp to even keep up with the C6 Z06? This is good news if it doesn't.