C5, Rebuild or Replace

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Jul 4, 2018 | 10:54 PM

ZERRY 316

Thread Starter

Racer

Joined: Jan 2017

Posts: 450

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From: Glendale Arizona

C5, Rebuild or Replace

1999 with 80,000 miles, your opinions to increase HP please, rebuild my LS 1 or replace with LS 7? I thank you in advance.

Jul 4, 2018 | 11:53 PM

grantv

Le Mans Master

Joined: Sep 2014

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From: Kelowna BC

That's a pretty big separation. How much HP do you want? What's your goal (edit; and budget)? Just more fun, drag strip, track?

Last edited by grantv; Jul 4, 2018 at 11:58 PM.

Jul 4, 2018 | 11:57 PM

1999corvettels1

Safety Car

Joined: Jul 2010

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From: Chandler AZ

LS7, but are you aware they have problems with valves in those heads that can destroy the whole engine?

Maybe LS3 crate or build instead?

Mine has almost 89K still stock, have thought of LS7 block with striker to make 440 but those head issues steer me away, and I've read guys that have the heads fixed, sometimes those still break valves too!

I've read it's on any LS7 car or crate, including Z06 and Camero, even some aftermarket heads to replace factory heads failed too.

Jul 5, 2018 | 12:09 AM

NCVette1

Instructor

Joined: Apr 2018

Posts: 142

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From: NC

I say just build an ls1 to what you want. Of course starting out with an LS7 is always nice. I just think a modded C5 with a period correct ls1 that can hang with newer ls engines is the coolest option.

Jul 5, 2018 | 12:38 AM

Tsumi

Drifting

Joined: Nov 2016

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From: SF Bay Area

IMO a stroked LS3 would be a better choice than a LS7. Plus you can get the LS3 block for cheap out of Silverados, Sierras, Escalades, etc.

Jul 5, 2018 | 12:39 AM

~~~Josh~~

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From: Machineguns, because I don’t compromise

Neither. Do an LS3 with an aftermarket camshaft.

Jul 5, 2018 | 08:02 AM

Vetteman Jack

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Jul 5, 2018 | 05:38 PM

ArtClassShank

Pro

Joined: Apr 2017

Posts: 590

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From: Hanover Maryland

Why would you rebuild an 80K LS1? Either slap a blower on it or cam it. Don't know what your power goals are but the LS1 is very capable. I've seen LS7s going for $10K+. That's a lot of money that could be used to make an LS1 go well beyond 505HP.