Every IROC I have looked at has an crappy lil 305TPI in it. WHat years am I most likely to find a 350 in an IROC-Z? If the rear bumper don't say 5.7 tuned port anymore I don't even bother.

 

87-90

 

There's no arguing with Drew, just confirming.

....crappy lil 305TPI in it.... If the rear bumper don't say 5.7 tuned port anymore I don't even bother.

Hmmmm. I did "bother". My sig tells all.

 

that should help narrow down my search, thanks guys.

 

i wouldn't go by the rear bumper cover as your end all...never know what's happened to a car over the years. Look for the 8 in the 8th digit of the vin number, that's your best indication.

Also, a 305tpi/5 speed car is pretty quick. I wouldn't rule that out til you drive one. Assuming you drive stick or care to learn.

 

Wraith has a good point...a lot of road tests I have seen show that the 305 TPI 5 speeds, with proper gearing, were only a tick or two behind a 350 TPI in both 0-60s and 1/4 miles. Plus, you get the fun factor of buying a stick too!!

I used to be of the same opinion about 305 TPIs until I really looked at the raw #s...and there's a lot more 305s readily available too. Don't count them out.

 

Speeking of 305/5-speed cars, does anyone have an accurate 0-60 time for them in their stock forms.

 

That's a pretty wide open question... considering an LG4 or L03 with a 5 spd would pull anywhere from mid-high 16's and a 90-92 LB9 5 spd might pull mid 14's. Then you get into the peanut vs L98 cam argument and the variations of different years, etc.

From my experiance the 89 Formula LB9 5spd I test drove was just a hair faster than my LG4 auto, and quite a bit slower than my 87 Iroc 5.7L auto which is a hell of a lot slower than my 91 Formula 5.7L auto... Between that experiance and the lack of 5spd V8 cars around here, I don't put much faith in the LB9 T5 cars.

 

I found me an IROC with 350 and made offer, trying to seal the deal, I'm very excited!!!

Dude has doen some work to it already

 

Did 305 TBI ever come in an IROC and second was the LO3 ever found in an IROC-Z?

 

Iroc and Iroc-Z are the same thing.
yes the L03 was available in all platforms except the GTA in some years.

 

I gotta agree w/ Willie, the one time I talk to him he told me all about it. awesome car.

BTW Wille, how are those DRL's coming along? did you forget about me?

 

For the 305TPI speed density a reasonable 0-60 for a stock one would be 6.5 or so maybe a little less. As for did the L03 come in an IROC-Z? Check the sig.