C5, Rebuild or Replace

Reply Subscribe

Thread Tools

Search this Thread

Jul 4, 2018 | 10:54 PM

ZERRY 316

Thread Starter

Racer

Joined: Jan 2017

Posts: 450

Likes: 94

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

Posts: 5,278

Likes: 539

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

Posts: 3,947

Likes: 386

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

Likes: 14

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

Posts: 1,660

Likes: 365

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~~

Banned Scam/Spammer

Joined: May 2007

Posts: 15,685

Likes: 1,330

From: Machineguns, because I don’t compromise

Neither. Do an LS3 with an aftermarket camshaft.

Jul 5, 2018 | 08:02 AM

Vetteman Jack

Administrator

Joined: Mar 2001

Posts: 367,935

Likes: 24,702

From: In a parallel universe. Currently own 2014 Stingray Coupe.

C7 of the Year - Modified Finalist 2021

MO Events Coordinator

St. Jude Co-Organizer

St. Jude Donor '03 thru '25

NCM Sinkhole Donor

CI 5, 8 & 11 Veteran

Moved to C5 Tech.

Jul 5, 2018 | 05:38 PM

ArtClassShank

Pro

Joined: Apr 2017

Posts: 590

Likes: 134

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.