Lq4 Compression ratio help

Reply Subscribe

Thread Tools

Search this Thread

03-11-2023, 01:31 PM

Lq4c10

Teching In

Thread Starter

Join Date: Feb 2023

Posts: 24

Likes: 1

Received 0 Likes on 0 Posts

Lq4 Compression ratio help

I’m in the midst of putting together a lq4. I have 799 heads milled 0.020. From what I have heard that would be 10.53:1. Just decided to bore engine over 0.020. Will that bump my compression up much?

Last edited by Lq4c10; 03-11-2023 at 01:38 PM.

Reply Like

03-11-2023, 11:22 PM

Cajun ELESS-ONE

TECH Enthusiast

Join Date: Jan 2013

Location: Thibodaux LA

Posts: 674

Likes: 21

Received 64 Likes on 46 Posts

Boring will not increase compression. You can go thinner head gaskets to increase it some

Reply Like

03-12-2023, 04:43 AM

LS1Formulation

12 Second Club

iTrader: (13)

Join Date: Apr 2006

Location: Grand Rapids, Michigan

Posts: 2,758

Likes: 80

Received 588 Likes on 466 Posts

Boring does actually increase compression, just not by much. .020 over on an LQ4 will bump you up by .1, so your 10.53:1 will become 10.63:1, approximately.