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1987 IROC Camaro, is this fast?

Old 08-08-2015, 04:03 AM
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Car: 1987 IROC-Z
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1987 IROC Camaro, is this fast?

Would my car be considered fast?
Specs are as follows:
-305 5.0 V8
-5 speed manual transmission
-I don't know its exact weight but given the year, make, model I feel that should give anyone more familiar with third-gen Camaros a rough estimate
-Max power [email protected] rpm
-Max torque [email protected] rpm

I'd like to know if it's 1) fast, 2) if not, what would be considered fast for this car, and 3) what I could do to make it faster. Also any other knowledge would be useful, as it is a project car
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Old 08-08-2015, 06:55 AM
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Car: 1987 IROC Original Owner
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Re: 1987 IROC Camaro, is this fast?

Where are the HP & Torque numbers coming from? Engine dyno, chassis dyno, on line calculator? Fast in the Qtr? Fast on a track? Fast on the highway? What gears do you have in the rear? Which 305 5.0? What induction system, TPI? TBI? Ram?
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Old 08-08-2015, 11:56 AM
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Car: 1987 IROC-Z
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Re: 1987 IROC Camaro, is this fast?

Originally Posted by PurelyPMD View Post
Where are the HP & Torque numbers coming from? Engine dyno, chassis dyno, on line calculator? Fast in the Qtr? Fast on a track? Fast on the highway? What gears do you have in the rear? Which 305 5.0? What induction system, TPI? TBI? Ram?
Engine dyno, TPI, LB9 305 5.0 rebuilt, and as for fast where, I don't know you tell me that's kind of why I'm asking.
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Old 08-08-2015, 02:06 PM
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Car: 1987 IROC Original Owner
Engine: LB9
Transmission: M39 MM5
Axle/Gears: G80 G92 J65
Re: 1987 IROC Camaro, is this fast?

My 87 IROC with the LB9 305 5spd 3:45 rear gears in completely stock form with 88k miles on it turned a 14.57 @ 91.71 MPH with a 2.090 60' on it (that's the only time it went to the track). When it was new it beat just about everyone I lined up against on the street except for the Grand Nationals - unless we were on the turnpike & their speed limiter kicked in.

If yours is a fresh rebuild, I would expect better.





Last edited by PurelyPMD; 08-08-2015 at 02:11 PM.
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Old 08-10-2015, 12:20 PM
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Re: 1987 IROC Camaro, is this fast?

Depends who you ask but IMHO No your car is not fast.
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Old 08-10-2015, 12:25 PM
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Re: 1987 IROC Camaro, is this fast?

In its time it was fast stock like it was. Now days everything is fast so it just depends on your idea of fast.

Last edited by dmccain; 08-10-2015 at 12:28 PM.
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Old 08-10-2015, 12:51 PM
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Re: 1987 IROC Camaro, is this fast?

Depends on what YOU think is fast. My cbr F3/ totally custom, from engine to fairings, I thought was fast. I went 175 mph on it. 1st gear almost 60mph in no time...... Thats what I think is fast.... IMO
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Old 08-10-2015, 05:30 PM
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1987 IROC Camaro, is this fast?

Compared to cars nowadays, no its not fast. There are 4 bangers out there putting down faster 1/4 mile and 0-60 times now. In the mid 80s it was fast. Theres alot of work to be done to keep up with todays cars.
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Old 08-11-2015, 10:37 PM
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Car: 1987 IROC-Z
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Re: 1987 IROC Camaro, is this fast?

Basically the same answer all the way across. I've hit 150 mph, but I feel like any faster I'd blow it to hell and back. My idea of fast is AT LEAST doubling it's power, somewhere around 400 hp and being able to actually compete in 1/4 mile. Make it a real muscle car. I know it will be expensive and take years to achieve, but I have all the time in the world so my next question is what would be the next sensible step in bringing it up to such speed? For example, I'm not just gonna go from this to supercharging it. A buddy says getting a dual exhaust, swapping for a 383 stroker, and stiffening the chassis? (not sure what that means).

I thought it'd be best to ask here. My goal is getting it to at least 400 hp
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Old 08-11-2015, 11:48 PM
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Re: 1987 IROC Camaro, is this fast?

It will be faster than it was stock... But is it a fast car? NO

256 HP is nothing really in a 3400 lbs car... You loose about 15-20% through the drive line so at rear wheels you will have about 200 HP

Quick in these cars would be 350-400 HP at the engine
Fast in these cars would be 500 and up HP at the engine
Just my opinion though.

As far as getting more out of it... Sure it's a RWD GM car with a SBC engine... Your only limit is your bank account.

As to what you need to do next, it depends on what all you have now. Give us all of the specs on the car, engine, rear end, etc.

Like what heads, cam, compression, exhaust system, etc.
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Old 08-12-2015, 09:21 PM
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Re: 1987 IROC Camaro, is this fast?

Originally Posted by angel2794 View Post
Basically the same answer all the way across. I've hit 150 mph, but I feel like any faster I'd blow it to hell and back. My idea of fast is AT LEAST doubling it's power, somewhere around 400 hp and being able to actually compete in 1/4 mile. Make it a real muscle car. I know it will be expensive and take years to achieve, but I have all the time in the world so my next question is what would be the next sensible step in bringing it up to such speed? For example, I'm not just gonna go from this to supercharging it. A buddy says getting a dual exhaust, swapping for a 383 stroker, and stiffening the chassis? (not sure what that means).

I thought it'd be best to ask here. My goal is getting it to at least 400 hp

How to Tune and Modify Your Camaro, 1982-1998 (Motorbooks Workshop): Jason Scott: 9780760304365: Amazon.com: Books How to Tune and Modify Your Camaro, 1982-1998 (Motorbooks Workshop): Jason Scott: 9780760304365: Amazon.com: Books


Here's a good book that really helped me understand the nature of modifications and performance. It covers 4 categories of project: street high performance, drag racing, autocrossing and road racing. It all depends on what you want to achieve and your budget. I am up to $40K in mods and countless hours of research and work. I haven't got to the engine yet, though the car is now ready to receive it. It took a fair bit of time for the intake pilot project to be completed. Lots of testing and tuning. Quite the custom job and lots of head aches. The car is still fairly slow!

More power means a need for a stronger structure (stiffening the chassis), increase breaking power, strengthening of drive train and rear-end for increase torque capability, improved suspension to put the power onto the pavement, fuel delivery and ignition upgrade, cooling capability to name a few. You want that increased power onto the pavement not in smoke!

Everything works in synch so you must have a vision and a plan.

Check out Mark Stielow interviews on youtube and you will get a good insight on what it takes to take on a project like that.

Best of luck!

Last edited by SbFormula; 08-12-2015 at 09:47 PM.
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Old 08-12-2015, 09:48 PM
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Re: 1987 IROC Camaro, is this fast?

Originally Posted by PurelyPMD View Post
My 87 IROC with the LB9 305 5spd 3:45 rear gears in completely stock form with 88k miles on it turned a 14.57 @ 91.71 MPH with a 2.090 60' on it (that's the only time it went to the track). When it was new it beat just about everyone I lined up against on the street except for the Grand Nationals - unless we were on the turnpike & their speed limiter kicked in.

If yours is a fresh rebuild, I would expect better.




Great classic look. That was the beast of the late 80's
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Old 09-27-2015, 05:39 PM
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Re: 1987 IROC Camaro, is this fast?

Originally Posted by PurelyPMD View Post
My 87 IROC with the LB9 305 5spd 3:45 rear gears in completely stock form with 88k miles on it turned a 14.57 @ 91.71 MPH with a 2.090 60' on it (that's the only time it went to the track). When it was new it beat just about everyone I lined up against on the street except for the Grand Nationals - unless we were on the turnpike & their speed limiter kicked in.

If yours is a fresh rebuild, I would expect better.




She looks great wet!
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Old 10-06-2015, 06:33 PM
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Re: 1987 IROC Camaro, is this fast?

i can go from 80 mph to 120 mph in less than 4 seconds with my Hyundai Genesis 2.0T (stage 3) and it's heavier than my 84 camaro, soooo....no, not fast but it's cool as hell
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Old 06-20-2019, 12:47 AM
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Re: 1987 IROC Camaro, is this fast?

Camaro.

Last edited by Pacifictime; 06-20-2019 at 12:54 AM. Reason: Oops put in wrong thread
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Old 06-26-2019, 05:11 PM
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Re: 1987 IROC Camaro, is this fast?

There was no such thing as a fast IROC.
If you want reliable fast, and street-able, 20K should get you started.
The thirdgen was never meant to be a high hp, high torque, or fast car. The structure and components were designed for the meager 245hp it was given at birth. And the structure couldn't even handle that. That's why the t-tops disappeared with the 5.7 option.
Considering the investment it requires to make a thirdgen a contender on the street, track, or strip, the money is better spent on a newer vehicle. The pay-out will be less, it's drivable now, and will have a higher return in investment.
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