Last run of the IROC
Thread Starter
Teching In
Joined: Jul 2005
Posts: 20
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From: Wilkes Barre, Pa
Last run of the IROC Well this weekend we are going to pull the old tired 305TPI out of the IROC to get ready for the LS1 so I thought I would take it out for one last run. My brother-in-law's came over so I wanted to see how I faired against some newer cars.
1st run was a Mazda 6 (V6/auto/CAI). From the dig I got the jump. Granted I launched the car from 4k cause I'm not worried about breaking anything.
I pulled out about 1 car. By 60mph he was already passing me. By 100 he was pretty far ahead of me. 
2nd run was a Tiburon GT (V6/Manual/CAI/catback). Again from the dig I launched the car hard and pulled a good 2 cars on him. By 60 he was at my door and by 100 he was at least 3 cars ahead of me if not more.
Sadly the IROC wasn't up to the task. 90% stock and a weak 305ci. Once it's done it will be a new beast.
Well after getting my azz handed to me twice I felt I needed a little revenge for the Chevy so I dropped off the IROC and got the WRX. Well feeling good about the whooping they put on the IROC they thought they would put up a good fight against the WRX.
3rd run was the WRX vs the Mazda. From the dig I launched nicely and put, well at least 4 cars before I shifted into 2nd. By 60mph I was so far a head he shut down.
4th run was the WRX vs Tibby. Again from the dig I put 4 cars before 2nd. By 60mph I was around 6 to 8 cars out (hard to tell in the rear view). By 100mph I could barely see his car. I shut down and he pulled up next to me and gave me the finger with a smile on his face.
Well sorry, I wish I could have told a story about the bow tie winning but it's an old beast and was never really quick to begin with. But once I'm done it will be a different story. I'll make you guys proud of the Chevy. In the end it will be a STS LS1 mated to a 6mt with 4:10 and DR's.
1st run was a Mazda 6 (V6/auto/CAI). From the dig I got the jump. Granted I launched the car from 4k cause I'm not worried about breaking anything.
I pulled out about 1 car. By 60mph he was already passing me. By 100 he was pretty far ahead of me. 2nd run was a Tiburon GT (V6/Manual/CAI/catback). Again from the dig I launched the car hard and pulled a good 2 cars on him. By 60 he was at my door and by 100 he was at least 3 cars ahead of me if not more.
Sadly the IROC wasn't up to the task. 90% stock and a weak 305ci. Once it's done it will be a new beast.
Well after getting my azz handed to me twice I felt I needed a little revenge for the Chevy so I dropped off the IROC and got the WRX. Well feeling good about the whooping they put on the IROC they thought they would put up a good fight against the WRX.
3rd run was the WRX vs the Mazda. From the dig I launched nicely and put, well at least 4 cars before I shifted into 2nd. By 60mph I was so far a head he shut down.
4th run was the WRX vs Tibby. Again from the dig I put 4 cars before 2nd. By 60mph I was around 6 to 8 cars out (hard to tell in the rear view). By 100mph I could barely see his car. I shut down and he pulled up next to me and gave me the finger with a smile on his face.
Well sorry, I wish I could have told a story about the bow tie winning but it's an old beast and was never really quick to begin with. But once I'm done it will be a different story. I'll make you guys proud of the Chevy. In the end it will be a STS LS1 mated to a 6mt with 4:10 and DR's.
On The Tree
Joined: Apr 2002
Posts: 119
Likes: 0
From: Houston, TX
Ah...I love the IROC. Mine had the 305TBI/5-speed combo. You know you can beef up a tpi350 for a few bucks and be pulling stock ls1s right? A much easier and cheaper swap. I did mine in a weekend for about 700 bucks(engine/new flywheel/new cluctch). I never built out my motor to take down the new ls1s but I have helped build 350TPIs that beat down stock ls1s. Good luck with your swap though, Im sure it will be fun. Where do you guys get the money and time to do this cool stuff to your cars?
I disagree on beefing up the TPI to run with LS1's... I owned a TPI 350 IROC and 90 Firebird Formula. Those engines are not worth modding. Hot Rod Magazine proved it time & time again when they tried like different project cars back in the 90's. I think after thousands of dollars, they might've ended up running mid to high 13's with drag slicks. They are fuel starved, have bad head designs for higher flow, and don't support bigger cams. Pull it and put in an LS1 and never look back.
On The Tree
Joined: Apr 2002
Posts: 119
Likes: 0
From: Houston, TX
I guess its a matter of time and money for some. Perspective for others. If you grew up around the cars I did, you might feel different and vise versa. I think everybody would rather have a ls1 over a l98. Its all about cost per HP.
But getting killed by family cars and suvs while in a IROC is always hillarious.
But getting killed by family cars and suvs while in a IROC is always hillarious.
Thread Starter
Teching In
Joined: Jul 2005
Posts: 20
Likes: 0
From: Wilkes Barre, Pa
Originally Posted by j_rock
Ah...I love the IROC. Mine had the 305TBI/5-speed combo. You know you can beef up a tpi350 for a few bucks and be pulling stock ls1s right? A much easier and cheaper swap. I did mine in a weekend for about 700 bucks(engine/new flywheel/new cluctch). I never built out my motor to take down the new ls1s but I have helped build 350TPIs that beat down stock ls1s. Good luck with your swap though, Im sure it will be fun. Where do you guys get the money and time to do this cool stuff to your cars?
As for the money. Well I have a good job and a understanding woman. Ok I have a uninformed woman. If she knew how much I spent on my cars she would kill me.
I just picked up a 20g^8cm turbo for my WRX. I told her I traded my old one and $100.00 for it. 
Originally Posted by dannyz
Dude, post up some pictures when your done.
A good many of us love those 3rd gen F-body's!
Especially the IROC's.
A good many of us love those 3rd gen F-body's!
Especially the IROC's.
$200.00 per year for a car. No bad if you ask me. Trending Topics
Originally Posted by WRX-ERROR
Well I have a good job and a understanding woman. Ok I have a uninformed woman. If she knew how much I spent on my cars she would kill me. I just picked up a 20g^8cm turbo for my WRX. I told her I traded my old one and $100.00 for it.
I just picked up a 20g^8cm turbo for my WRX. I told her I traded my old one and $100.00 for it. 
Oh, if you do an STS, DO NOT put 4.10's!!!
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Teching In
Joined: Jul 2005
Posts: 20
Likes: 0
From: Wilkes Barre, Pa
Originally Posted by bboyferal
Oh, if you do an STS, DO NOT put 4.10's!!!
My brother has a Black 87 IROC, 20th Ann. L98 with True Duals and K&N's and Im pretty sure it will take a new Tiburon V6.
Its around 240bhp,350btq.
I'm not going to stick up for any 305 TPI because ive rode in two of those and I was not impressed at all.
Although I have rode in decent L98's.
I know on paper the motors look the same for output, 190hp compared to 210/215, but from what I have experienced there is a definitive difference.
Its around 240bhp,350btq.
I'm not going to stick up for any 305 TPI because ive rode in two of those and I was not impressed at all.
Although I have rode in decent L98's.
I know on paper the motors look the same for output, 190hp compared to 210/215, but from what I have experienced there is a definitive difference.
I own a 91 z28 350 tpi. Bored .060 over with forged internals, and full bolt-ons, and some weight reduction.(Used to run nitrous) and on the motor it would give my 01 SS a pretty damn good run for it's money. Once I hit 3rd in my 01 ss i'd probably pull pretty hard but down low the L98 will hold it's own. Especially in stop light races if you have sticky tires.
Originally Posted by WRX-ERROR
That bad? I had a feeling it was too much gear for it but wasn't sure. I'm still in the planning stages and those plans seem to change everyday. A friend of mine did a home made STS kit on his C5 so I'll consult him on that.
The higher the gear ratio goes, the lower the load is on the turbo, producing slower spool... This is an important issue for front mounted turbo F-body's, but it is SPECIALLY IMPORTANT on a remote-mount!!! The same goes for the Corvette.
Some STS cars that are not properly set up do not even see full boost in first gear at all, even without any wheelspin. This is a very important consideration for a remote mount.
Oh, good kills with the Subie.
