88 iroc-z engine rebuild.
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Junior Member
Joined: Jun 2013
Posts: 6
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From: NC
Car: 1988 IROC-Z
Engine: LB9
Transmission: M5
88 iroc-z engine rebuild.
I'm new to the 3rd gen and have been reading a lot of posts on what parts to use for specific rebuilds. As I am new to third gen I am new to car performance as well. What I am asking is for guidance in rebuilding a stock 88 iroc-z 305 5-speed. I don't want to swap because I'm a father and in the military working with a blue collar income. Please help me with this gentleman.
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Joined: Jan 2012
Posts: 586
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From: Romney, WV
Car: 89 IROC Z/88 IROC Vert
Engine: 350c.i./305c.i.
Transmission: 700R4/T-56
Axle/Gears: 3.42/4.10
Re: 88 iroc-z engine rebuild.
What specific questions do you have about the rebuild? What Is the reason for the rebuild? Help us help you.
Thread Starter
Junior Member
Joined: Jun 2013
Posts: 6
Likes: 0
From: NC
Car: 1988 IROC-Z
Engine: LB9
Transmission: M5
Re: 88 iroc-z engine rebuild.
I'm rebuilding for performance, in a budget of 2500-3000. I really don't have time to do it myself so I will have to put it in the shop but I don't want to be screwed by guys that know the business when I don't.
Thread Starter
Junior Member
Joined: Jun 2013
Posts: 6
Likes: 0
From: NC
Car: 1988 IROC-Z
Engine: LB9
Transmission: M5
Re: 88 iroc-z engine rebuild.
For questions, I wanna know what parts I would get the most for rebuilding and why. I really want to learn everything I can about this vehicle.
Senior Member
iTrader: (7)
Joined: Jan 2012
Posts: 586
Likes: 2
From: Romney, WV
Car: 89 IROC Z/88 IROC Vert
Engine: 350c.i./305c.i.
Transmission: 700R4/T-56
Axle/Gears: 3.42/4.10
Re: 88 iroc-z engine rebuild.
I know you said you don't want to swap engines but you should reconsider that. It's extremely tough to make power with a 305. You have a good budget to work with for an engine swap. Not so much if your trying to build a 305 for power or a engine build in general. I just built a 350 for my 89. My 2k budget quickly blew past 4k with me doing all the work myself.
Senior Member
iTrader: (7)
Joined: Jan 2012
Posts: 586
Likes: 2
From: Romney, WV
Car: 89 IROC Z/88 IROC Vert
Engine: 350c.i./305c.i.
Transmission: 700R4/T-56
Axle/Gears: 3.42/4.10
Re: 88 iroc-z engine rebuild.
But to answer your question, heads, cam and intake are the areas were you should spend your money. The top end of these motors are very restricted. The were built for torque not horse power.
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Joined: Sep 2009
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From: who knows
Car: '90 Camaro
Engine: 305 tbi
Transmission: T5
Axle/Gears: 9 bolt posi 373
Re: 88 iroc-z engine rebuild.
I'm new to the 3rd gen and have been reading a lot of posts on what parts to use for specific rebuilds. As I am new to third gen I am new to car performance as well. What I am asking is for guidance in rebuilding a stock 88 iroc-z 305 5-speed. I don't want to swap because I'm a father and in the military working with a blue collar income. Please help me with this gentleman.
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Thread Starter
Junior Member
Joined: Jun 2013
Posts: 6
Likes: 0
From: NC
Car: 1988 IROC-Z
Engine: LB9
Transmission: M5
Re: 88 iroc-z engine rebuild.
Stationed on camp lejeune. I am not wanting to do a swap because I've heard that the transmission I have would not do to well with a 350, and swapping a tranny and engine would be time and costly.
Senior Member
iTrader: (7)
Joined: Jan 2012
Posts: 586
Likes: 2
From: Romney, WV
Car: 89 IROC Z/88 IROC Vert
Engine: 350c.i./305c.i.
Transmission: 700R4/T-56
Axle/Gears: 3.42/4.10
Thread Starter
Junior Member
Joined: Jun 2013
Posts: 6
Likes: 0
From: NC
Car: 1988 IROC-Z
Engine: LB9
Transmission: M5
Re: 88 iroc-z engine rebuild.
Senior Member
iTrader: (7)
Joined: Jan 2012
Posts: 586
Likes: 2
From: Romney, WV
Car: 89 IROC Z/88 IROC Vert
Engine: 350c.i./305c.i.
Transmission: 700R4/T-56
Axle/Gears: 3.42/4.10
Re: 88 iroc-z engine rebuild.
There's a million different options out there but with your budget that narrows it down. If I were on your budget a set of 113 vette heads are something I might look at. They can be had for around $500 for the pair and are a upgrade over your stock heads. Check out member MRBrisk. He has a pretty decent 305 setup in his 87 IROC. Intake, I'd try a Holley stealth ram to raise the rpm range and a cam to help it breath above 5000 rpm as well. Those pieces on a $3k budget should keep you under $2k leaving you some cash for labor If you buy the heads and intake used.
Senior Member
iTrader: (7)
Joined: Jan 2012
Posts: 586
Likes: 2
From: Romney, WV
Car: 89 IROC Z/88 IROC Vert
Engine: 350c.i./305c.i.
Transmission: 700R4/T-56
Axle/Gears: 3.42/4.10
Re: 88 iroc-z engine rebuild.
Actually there's a set of 113's and a zz4 roller cam for sale in the classifieds right now for $500.
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