TPI Tuned Port Injection discussion and questions. LB9 and L98 tech, porting, tuning, and bolt-on aftermarket products.

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Old

Apr 18, 2004 | 08:15 PM

#1

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Junior Member

Joined: Mar 2004

Posts: 40

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Car: 87 Iroc, 88 Camaro

Engine: 5.7L TPI, V6

Transmission: 700r-4, t56

spark plugs

hey i was just wondering i was going the change my spark plugs and in the book at the store there are 2 types of plugs for an 87 iroc 350 tpi, for the cast iron block and the aluminum block my engine code is 8 in the vin but im sure i have a cast iron but did they even make a full aluminum block for the 350 in 1987?

Old

Apr 18, 2004 | 08:28 PM

#2

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Joined: Mar 2003

Posts: 40

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From: Makakilo

Car: 89 IROC

Engine: LB9

Transmission: 700r4

To my knowledge no they didnt make an aluminum block. I think it should matter anyway.

Old

Apr 18, 2004 | 09:29 PM

#3

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Joined: Jan 2004

Posts: 2,947

Likes: 368

From: Las Vegas

Car: 1987 Formula (original owner)

Engine: 305 TPI

Transmission: T5

Axle/Gears: 9-bolt/3.45

I believe that refers to aluminum heads, which Corvette 350s have.

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