And how did they compare to camaro engines,I have the chance in a couple months to put the engine,drivetrain and rearend out of an 88 vette into my IROCZ,is this worth it?????

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86 IROC,canary yellow(originally black),fully loaded.305TPI WITH 700R4/SHIFT KIT,2:73 POSI REAR,4 WHEEL DISC BRAKES,T-TOPS,POWER LOCKS,POWER WINDOWS,TILT,CRUISE,SADDLE INTERIOR,POWER ANTENNAE,SPOILER OFF 87 IROC SO NO THIRD BRAKE LIGHT ON ROOF,16" BY 8" RIMS OFF 89 IROC,3"INCH EXHAUST WITH A 2 CHAMBER FLOWMASTER AND 3 1/2" BY 18" LONG CHROME TIPS,20% TINT ON SIDES,HATCH AND T-TOPS,GTS TAILLIGHT COVERS,AFTERMARKET FOG LIGHTS,PIONEER CD RECIEVER WITH REMOTE AND DETACHABLE FACEPLATE,WITH JENSON SPEAKERS ALL AROUND,TALKING RADAR DETECTOR"BACON ALERT"

....Long live the EIGHTIES!!!

 

I know the rear won't fit without major fab work done. Vettes have IRS. As for the engine, I think they were rated around 325hp. The trany is the same, except a little better and harder in shifting.

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Rob
'86 TA 305 TPI
Gutted MAF
Ported Plenum
TB Bypass

 

No, they were rated at 245 HP, and that is about all they are.

 

They were no where near 325hp, they were basically just rated 10-15 hp over the F-bod 350 TPI.

I would swap the 350 in place of your 305, but I'd do a few mods to the 350 before it went in.

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Ray87Z
-Vortec headed 350.
86 IROC w/ a cammed 305 TPI.
Formerly Ray86IROC.
www.inter-scape.com/Ray

 

Just my .02.. but I heard swapping the six speed tranny that the C4 vettes used is really tough. I don't know what kind of tranny they used before they had a six speed .. a T5? I'd be kind of interested in knowing.

 

stock 88 vettes were rated at 245hp@4300 Rpms, and 335 Ftpds torque @3200 rpms. Im getting this directly out of the September 1988 issue of Motor Trend, were they did a high speed shootout of several cars, including a vette, an iroc, and a GTA- all with 350 TPIs. The iroc was rated at 235 and 335, and the GTA was rated at 220 and 330.
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My 1986 Z28 and more!!
view my car (movie)

[This message has been edited by zupmanZ28 (edited February 09, 2001).]

 

Well, not certain on the exact rating, but in '87 it was about 255-260hp advertised, because the GN had to be advertised lower, so the GN was advertised to be 245hp when it was really about 295.
Then in 89, the TTA was advertised at 255hp, again because it couldn't have more hp than the 265hp Vett, but the TTA was more like 300hp. I have the HR and C&D mag articles for both.
So the 88 Vette was right in between the 87 and 89 ratings of 255 - 265.

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Rob
High Performance & Party page
Pics of my rides past & present and recent party pics!

89 TTA #426 20th Anniversary turbo 3.8 bone stock
94 Silverado Tuned Port Injected
87 Grand National- lil' ole V6, highly modded
95 Trans Am Conv.- LT1

 

Sorry I was wrong, I was just guessing off the top of my head. I know the Vette eventually came with over 300 horses, must have been in the 90's.

 

The highest rate L98 Corvette was in 1991 @ 250 HP. In 1992 they were rated @ 300 HP when they switched to the LT-1.

And there was never a 15 HP difference between IROCs and GTAs if BOTH had dual cats. Some sources rate the difference at 5HP and others identical. My 1991 GTA is rated by some sources (my GM shop manual) at 245 and others (some internet sources) at 240. The difference is attributed to the intake only. But I've never seen a 15 HP difference on identically equiped IROCs and GTAs. That's a myth.