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Old 12-05-2013, 03:30 AM   #1
F-16 Camaro
 
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Stock '89 IROC-Z 5.7L RWHP

My best friend has an '89 IROC-Z that has been in shambles for the last 10 years.

I was driving him around in my 2010 Camaro SS the other day and he was saying how he didn't like the current gen cars.

Then he started talking about how his car was a beast and had all kinds of power. I remember riding in it a LOOONG time ago, so I decided tonight to check the stats for his car...

I had a hard time finding a direct answer, but I came upon this:
"240HP / 345Torque"

Is this accurate?
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Old 12-05-2013, 03:58 AM   #2
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And that would be pushing it IIRC.
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Old 12-05-2013, 04:53 AM   #3
376LS3
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I have an IROC and I can guarantee there is not gobs of power! A V6 5th gen would walk me hands down. He seems to be a dreamer.
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Old 12-05-2013, 05:53 AM   #4
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Quote:
Originally Posted by 376LS3 View Post
I have an IROC and I can guarantee there is not gobs of power! A V6 5th gen would walk me hands down. He seems to be a dreamer.


The IROC has more torque providing a better 60' time and even 1/8 mile time. However, the newer V6's have more HP and can come thru at the top end.

I took the following information from dragtimes.com

Comparing some of the 89 IROC's to my V6.
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Old 12-05-2013, 11:03 AM   #5
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Quote:
Originally Posted by F-16 Camaro View Post

I had a hard time finding a direct answer, but I came upon this:
"240HP / 345Torque"

Is this accurate?
yes that's correct. they did feel pretty powerful with all that torque. you have to remember people, they were only 3,370 pounds.
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Old 12-06-2013, 04:15 AM   #6
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Oh my God, I would've never thought 240. I'm literally speechless.
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Old 12-06-2013, 04:15 AM   #7
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Now I want to help him work on his car, so that it will run so I can smoke him!
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Old 12-09-2013, 08:02 PM   #8
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Quote:
Originally Posted by F-16 Camaro View Post
Now I want to help him work on his car, so that it will run so I can smoke him!
Unless his car has quite a few mods, theirs no way he will smoke you lol.

Stock 5.7 350 TPI cars run 14.3's at theres BEST, STOCK.

TPI is terrible for going fast.


If he converted that L98 350 to Carb or to a Holley Stealth ram setup and an aftermarket cam, then he would definitely give you a run for your money.


I had an 11 second 3rd gen Camaro. It weighed ~3100lbs and made ~480rwhp, 6-speed Manual. When it had 347rwhp and weighed 3,250lbs, I ran 13.2 @ 111 MPH with no traction. That's stock 5th gen SS territory.

Stock TPI cars are not fast. They're burnout machines though!
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Old 12-11-2013, 10:21 PM   #9
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Funny, mine was 220HP and I thought it was fast back then. Nothing like today's models.
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Old 12-11-2013, 10:26 PM   #10
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Agreed

Torque monsters are about it when it comes to the 5.7 TPI's. I have a 91 Z 5.7 and it is the biggest turd as far as power goes. Nothing special at all as far as power goes
Stock 90-92 5.7's are rated 245 h.p. 345 lbs of torque. RWHP can't be much at all
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Old 12-28-2013, 07:56 PM   #11
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Another thing to consider is the TPI runs out of breathe at 4500 rpm.

Although on the autoX course the IROC will walk all over the 5th gen unless the 5th gen is 1LE or ZL1.
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Old 01-07-2014, 11:52 PM   #12
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Stock z28 have 240 hp, TPI is deffnly not the way to go lol LS1 is where it's at
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Old 01-08-2014, 06:41 AM   #13
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My '91 Z28 with the 350 had a lot of bolt-ons done to it. It's best time at our local 1/8th mile was a 9.03, it did have a little more in it (I had to baby it out of the hole), so possibly 8.85 or so. That translates to roughly 13.7-13.8 in the 1/4. That's with headers, a cat-back, a CAI, airfoil, chip.
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Old 01-08-2014, 07:43 PM   #14
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in 1989 an IROC with 245HP/345 TQ was pretty impressive. If it had the g92 with good gearing, they were pretty stout for that era.

would love to find a clean one, but they have become almost non existant!

seems like the only ones out there are beaters, highly modified drag cars, or a few garage queens with 3,000 original miles and a $30k price tag!
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Old 08-19-2015, 08:47 PM   #15
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i have an 89 w/ 5.7 and 327 HD rear axle. It does run out of steam at around 4600 RPM, the biggest draw back is first gear is 3.06 which launches it nicely but then 2nd is 1.63 where it goes dead. lots of fun for smoking stock tires off the line! only 11,125 original mi on original shoes.
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