I'll make this short. There is this young kid driving like he's a badass in his Iroc. He gets next to my Yukon at a stoplight and I had that feeling that he was gonna take off. So the light turns green & I give it half throttle waiting to see what he's gonna do. Sure enough he takes off so I go full throttle too and we were dead even through 1st gear. I went into 2nd & started inching away and by the time I hit 70mph he had fell back to where his front nose was at my drivers door. Then he let off and so did I. I slowed down trying to get him next to me but he wouldn't. At the next stoplight he turned off. I guess he didn't want to take the embarrassment of me laughing in his face. What has the world come to when SUVs are outrunning the "sports cars?"

 

320hp vs 215hp and 15 years

 

320hp???

Its most likely a base model. I think the only one with more than 320 is the 6.0 and the 8.1.

 

Well its certainly not a base model. Its an SLT with all the the power acc., sunroof, 3 rows of leather seats, etc. The biggest motor you can get in the Yukon is the 5.3L rated at 285hp. Only the Suburban gets the 320hp 6.0L. I didn't see the 5.7L TPI badge so I would guess he had the 305 TPI. Aren't those 190hp?

 

190-215 or so. Depending on year.

My dad has a Avalanche with the 5.3. Nice little setup GM has there.

 

I believe it, I have driven around in my friends Denali, and even though that has the 6.0, it weighs more and cant be that much faster. Would definately put a hurting on a lot of third gens!

 

yeah well yeah the yukon has more hp... but umm doesnt weight and other things play big role for the IROC.. My friends Z28 92 smoked my moms 5.7 suburban 1999...

 

It also could have been a TBI iroc. Either way good race.

 

The 5.7 and the 5.3 are two TOTALLY different beasts.

 

The 5.7L TBI is not all that great.

 

While that is true, the 96-99's(I think) came with multiport. It looks like a old fashioned manifold with a TB and injector rails on it.

The 5.3's is a LS1 type engine. The Gen 3 small block. Excellent heads/intake/fuel injection.

 

Really??? I thought it was a TBI system? Oh well it still was not as good as the new 5.3 LS1 style motors. Those things can get going.

 

Couldn't you get an IROC with an LG4??

 

3rd gens and yukons vary quite a bit in power level. I doubt a 92 5.7 tpi would lose to any yukon, but most were 5.0 tpi or tbi. Besides there are too many other factors, ever put a rebuilt tranny in a car only to have it upshift at 4000 rpm ? How many teenagers can afford or know enough to keep their cars in good tune?

i wouldn't get too cocky.

 

nope, could get a Z28 with LG4, but IROC always meant TPI, upgraded suspension, and should also mean 4 wheel discs (haven't seen a real IROC without them). those "TBI IROCs" where just ripoff dealer options like the "GT appearance package" for V6 stangs, I've never seen or heard of them as a factory deal. it was just dress up for extra money: throw $20 in decals on the car, charge an extra $2000 over the RS base price. most irocs you find are the 190 HP 305, they run 15.8-15.9, lol, I think a 6.0L LQ4 SUV could beat them without a problem

 

nope, Yukon Denali's get 6.0L LQ4s, 325 HP

 

thats it i want a yukon!

 

Some of those GM truck motors are pretty ballsy. My dad has a 97 Chevy Express with the 5.7 Vortec and towing package. That huge *** van has had its fair share of killings. I beat an old RS camaro Lo3 once, as well as an Olds Aurora up to about 50. H*ll I even punked a STS caddy who was trying his hardest to pass me on the right side from a light

 

we have a 01 sierra c3, for the most part only made one year its a denali truck. 6.0, awd, denali platform/interior...the stats say it will run 16.0 in a quarter, the thing will snap your neck off on a 0-60 though! it would deff run with my iroc for the first 2 gears.

 

You COULD get IROC's with LO3 TBI's. Do a search. I have a friend that owned an 88 Iroc with an L03 TBI. And yes it was documented It had the FE2 suspension and rear drum brakes.

 

no, it's bull**** you ******. yeah let's all do searches and believe non-sensical horsecrap. IROC ALWAYS = 4 wheel disc, upgraded suspension and TPI. TBI "IROC" was a stickercharged dealership ripoff. it was not real and anyone who says their RS with an IROC door badge is an IROC is lying. get a damn clue. you sound like an idiot.

 

no, it's bull**** you ******. yeah let's all do searches and believe non-sensical horsecrap. IROC ALWAYS = 4 wheel disc, upgraded suspension and TPI. TBI "IROC" was a stickercharged dealership ripoff. it was not real and anyone who says their RS with an IROC door badge is an IROC is lying. get a damn clue. you sound like an idiot.


take it easy guy, dont have to get all bitchy at him, relax and its just bout cars

 

Here are a few examples:


Refer to the second last paragraph...

QUOTE]Originally posted by Willie
....so if you had a base 89 v6 camaro you could get/it came with a 115mph speedo?

Yes. What I saw pictured came from a 1988-1989 V6 Camaro/RS. It did NOT come in an IROC-Z.


I thought tpi z28s and irocs came w/ the 115 speedo between 87-89 and the 350 iroc could be had w/ a 145?

Fact (1987):
All speedos were all 85-mph units with a V6 and LG4 V8 regardless of model. With a 305 TPI or 350, the 145-mph speedo was used.

Fact (1988-89):
The 115-mph unit replaced the 85-mph speedo in 1988 as the "base" speedo. All V6 Camaros got the 6,000 rpm redline tach. All 1988-1989 305 TBI IROC-Z's got the 115-mph speedo. All 1988-1989 350 Camaros got the 145-mph speedo.

What I cannot guarantee (1988-89): 305 TPI IROC-Zs>> I do not know if these coupes and convertibles came with the 115 or 145-mph. Furthermore, I do not know if G92 had anything to do with the speedo for these years. [/QUOTE]

https://www.thirdgen.org/techbb2/sho...t=IROC+TBI+LG4

https://www.thirdgen.org/techbb2/sho...t=IROC+TBI+LG4


There are a few hundeed more threads at TGO alone on this subject and a few thousand more at google.

 

I started a new thread on the history board. I thought that seeing as I am ****** I don't know too much You can see what other "*******" have to add to it......https://www.thirdgen.org/techbb2/sho...hreadid=246150

 

And just for the sake of clarity I checked the word "sensical" . Is it something special because its not listed in Merriam Webster's 2004 edition. Maybe you could show a "******" what it means??????

 

vamp

The LG4 and the L69 4-barrel 305's were both available in the IROC in '85 and '86. The LG4 was also available as the base IROC motor in '87 (the last year of the carbed motor in the 3rd gen.) In '88 and '89 they used the L03 (TBI305) as the base IROC motor. '90-92 are the only years that the IROC (or Z28 in 91/92) only came with TPI.


RPO codes are set at the factory and cannot be changed....not by the dealer, not by an aftermarket conversion company, not by anyone. The parts can be changed, but the factory codes for what was originally put in the car on the assembly line remain the same. It's not a dealer ripoff, it's the way these cars were made. Do some research before you start calling people names.




Also the first letter of a sentence is supposed to be capitalized.

 

What he said. I have a friend that used to have a TBI Roc. It was pretty weird seeing him open the hood and have a air cleaner that big looking back at you.

 

This is out of the 85 camaro dealership book...........so as you can see the LG4 was the standard engine for the IROC in 85

 

vamp ur the moron ******

 

What a weenie

 

ugh, you people are pathetic. lol, yeah carpoint has the 170 HP TBI motor listed as the only engine for irocs too, let's all believe that as well. fine, TPI isn't a "must" but iroc = 4 wheel disc, upgraded suspension, not drum brakes and base suspension. as I said, if it's got that crap, it's just a stickercharged joke option like the GT appearance package for V6 stangs. 91-92 there was no IROC, it was a Z28.

 

Who made you an historian? The IROC I salvaged my trans & rear end from had rear drums. Maybe before you post your opinions you should double-check your facts. Now if you're the type of person that I see in these post I'm willing to bet I'm the next to be called names.

 

vampiroc
You must be either very young, extremely misinformed or both. You are obviously confusing your very biased opinion with fact. The facts are that IROC's were made with Carb's, TBI and TPI if you want to stick your head in the sand and ignore that fine but don't come here and start throwing names around when people try to educate you with the facts.

 

i've worked on an 87 IROC TPI car with rear drums, a formula 350 too with drums if that matters to anybody. i have also seen NON tpi irocs

 

Doesnt matter what we say, vampiroc obviously knows it all. You have to face the facts, you dont know it all.

 

i lost to a newer suburban on the freeway but it ran outa gears... redlining isnt healthy in the last gear of my trans.... i wish my speedo worked czuz i was passing everyone i came to.

 

91-92 there was no IROC, it was a Z28.



ugh no kidden! Tell me somthing i dont know, IROC Z Camaro 1985- 1990

 

I have a 91 firebird with the 5.7 TPI motor with just about nothing done to it. And for some reason the kids with the rich parents, driving those Yukon Denali's and even better the Escalades seem to be the ones that pull up to the line next to me. Its sad because they always have their girlfriends in the truck with em and they think they are tough Sh%t. I usually let them have the line to see if they will race, then i just blow their doors off. Then at the next light the girlfriend is sitting there laughing at her boyfriend Im sure if someone did some moding to those motors they could get up in speed, but were talking about a aerodynamic car vs. a brick lol. Just my 2cents.

Just saw what someone said about a formula with drum brakes. Mine is a formula and i just had to replace my shoes, if that helps anyone lol.

 

Don't you have to have the G92 option to have 4 wheel discs?

Just a question. I have a G92 90 Iroc... TPI and 4 discs. w00t

 

:hail: i h8 you... i h8 drums they are such a pain to work on... maybe ill find some nice 6pot calipers and big brakes for the front and 4pot for the rear... a lil conversion whould be nice