Does anybody know the top speed for the 85 iroc-z with tuned port injection??

 

Mine seems to top out around 125 @ 3500-4000 rpm with the stock chip. It seems to have a speed limiter, so I can't tell you what it would do with an aftermarket chip, or with different rear end gears, mine has 3:42's

 

I recently bought my iroc and dont know if it was moded, but the speedometer has mph on the left(85mph top)and the kph on the right side. the mph hand has been to 100 on the kph and still had more left in it. i cant acurately guess how fast that was, so!!..

 

ummmmmm


irocs didn't have the split speedometer.

 

In the October 1984 issue of Road & Track they review the "all new" 1985 IROC-Z, and they list the top speed at 140 MPH. I can't say if this is accurate or not, but surely they couldn't print it if it weren't true.

 

138 MPH from what I can find.

 

ditto

 

the speedometer needle was broke when i bought it, and had it replaced. the person that fixed it had several firebirds and camaros witch he got it out one of them!! but I would guess it was going more than the 140!!!

 

Hey

I have a 1985 IROC Z Camaro with a TPI engine and 3.42 gears and it goes good. I have had it goin around 130 or so and it was still pulling. Id say it could do 140 mph or so....

http://camaroz28.cardomain.com/id/56424

 

way past the biggest number shown on the 145 mph speedo i installed in 1988 or 87. yup

 

i don't know i have a 86 and my speedo only goes to 85!!!!