Hey guys, I have a friend who owns an 05 Subaru STi with nothing except a 2.5 in. Catback and a pro-tune. He raced a Trans Am with bolt-ons and a cam and beat him. I have been looking at buying a Trans Am and I want to beat him so bad it hurts. He's always had the faster car and so I want to turn the tables, what do I need? i know I need basic bolt ons (long tubes, intake, exhaust) a cam and heads but I was thinking, what if I changed the rear end gears? What ratio would I need? I intend on the car being a daily driver so I want some gas mileage but I want to kill the STi and also the Miata track car he's planning on building (250whp in a 2200lbs car is an STi killer). Can you help me out?
Cheers
-Hell Ride.

P.S. I was also wondering what a good mid-range cam profile would be? I don't want all the power up top because I want to have it mid to high range so that I can play with any car anywhere in my rpms.

 

any ideas guys?
bump

 

What conditions was the race in, because while STis can be fast, it would need more than that to beat a lot of the cars on this board, especially with full exhaust and a cam. If that's really all it has, I'm guessing it's a mid to high 12s car.

 

it was on the freeway from 60mph. I dont know that much about it because I wasn't there but I have been with him when he's run some cammed F-bodies and beat them. I want the Trans Am bad but not if I'm gunna keep getting beaten.

 

an exhaust and tune STi beating bolton cammed LS1s.... hrmmmmmmmmmmmmm.............. somthing doesn't add up.

 

yeah, I dont know. I think the Trans Am may have been an A4 but like I said, I wasn't there. What do I need?

 

My feeling is that the STIs biggest advantage is on launch. Beyond that, the LS1 would/should probably take over, especially a cammed LS1. From a roll, the STI you described should have gotten toasted. Know if the tune on the STI involved messing with the boost? I don't know a lot about turbos, but I know by varying boost you can get some pretty serious increases in power, at the potential expense of reliability. (i.e. blowing engines up, etc.)

To get back on topic, if your buddy's got an STI with a catback and a tune, an LS1 with full exhaust, cam and heads (and driver mod) should hand him his ***. Gears are another can of worms. Read up on that with a search, there's lots of info here.

 

ttt nice

 

i dont know if the T/A had heads but the STis tune did up the boost but I think only by one PSi because of the restriction of the stock solenoid. Yeah, he said it had bolt-ons but I dont know if he actually got to talk to the owner so it could have been a catback and a cam.

 

You could always build a car like my buddies this is a video of him beating an 11 second STI, i guess the STI has a Turbo mod (you can hear it in the video if you listen carefully) and some other bolt ons. No match for the 427 Camaro http://www.youtube.com/watch?v=AP8CN...did%3D53757702

 

Off to the rookie section with this thread.

 

if I'm not mistaken, those times are consistant with a stock turbo STi and also, racing from a dig is just stupid in an STi but thats not my decision. I dont want to have to keep on putting money into the car. I just want a car that runs strong and can beat the STi as is. It was from a roll, not a dig.

 

Good Power to weight ratio will usually give the lighter car a good edge.. from a rolling 60mph start.. I would think the STi might have the advanage due to the ligher weight and with the Turbo kicking in at the higher RPM.. but you never know.... it or the other car could have been in between gears or been in a bad RPM range.

Strip out any thing that you don't need to save on weight and lighten anything you can not take out or sub in some lighter ones.. that start to give you some help on top of the bolt-on HP parts.

 

Any STI with full exhaust and decent tune should run low 12s. That's about $1700 well spent. Trust me as I drive a WRX and we share parts. Starting a race anywhere under 80mph against an STI is potentially embarassing. We are geared for RALLY racing, so we can tear up just about anything until 110"ish"mph. My lowly 2liter has taken enough lightly modded f-bodies to know. That being said, I love my dad's C5's high-end enough to look into trading for a TA.

But anyways, STI has the advantage in ANY weather at ANYtime, especially at relatively moderate speeds(read: less than 130ish). LSx has advantage in long highspeed straights, and against a detuned or broken STI. So catch one with an economy map loaded and enjoy. And from what I've read, good luck keeping sensible mpg with high whp.

 

Your friends STi shouldnt beat a bolton and cammed ls1....but anything can happen.

Its not stupid for an STi to go from a dig! That their advantage!

 

I have had a roll race with an sti under 80 and i embarassed him. From a roll it might be embarassing for the sti

 

same here

 

hey mcamarols1, what kind of mpg are you getting with 400+whp? I said that it's stupid for an STi to run from a dig because they can shred transfer cases and snap axels as well as break differentials. Thats what I meant. I want a killer Trans Am. I drive a Hemi right now and I don't think I can ever own a car without a V8 again, unless I have a weekend warrior and a 4-banger daily.

 

Get the Trans Am and do h/c with full bolt-ons. My car puts out 450rwhp and has no trouble beating my friends STI with upgraded turbo and full bolt-ons putting 460awhp. He is really fast out of the hole but falls off on top end. The all wheel drive kills them up top. So from a roll you shouldnt have a problem.

 

oh, in correction to post number 9, the STi is running 3 more PSi than stock. It is at 17 instead of 14 but it's a quick car. The only thing we can come up with is that he broke the motor in perfectly. He gave it 800 miles, shifting at or below 3,000rpms and then started to go hard on it. It's quick but the thing is that his turbo is almost the perfect size (stock) hitting full boost at 3,000 rpms. It's amazing but I only want to look at it in the Trans Am and think.........yum! lunch! haha.