# 4G63t Compression Numbers

**URL:** <https://forums.speedlife.net/t/4g63t-compression-numbers/199881>\
**Category:** PittSpeed Automotive\
**Created:** [September 29, 2008, 11:56pm UTC](https://forums.speedlife.net/t/4g63t-compression-numbers/199881 "2008-09-29T23:56:26Z")\
**Posts on this page:** 1\
**Showing post:** 6

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**Author:** ![tjZ28](https://avatars.discourse-cdn.com/v4/letter/t/9de0a6/32.png) [@tjZ28](https://forums.speedlife.net/u/tjZ28)\
**Post date:** [September 30, 2008, 10:56am UTC](https://forums.speedlife.net/t/4g63t-compression-numbers/199881/6 "2008-09-30T10:56:47Z")

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> [@FS. 97 GTP Parts car $750](https://forums.speedlife.net/t/fs-97-gtp-parts-car-750/38110/10):
>
> 1. page. dick swinging contest about 4g63 HGs

I believe what he meant was read _this_ thread. The link to the other thread was just for reference, for those that cared to read it. The real question is how do those compression numbers look. The general consensus is they’re solid and I’m good to go.

> [@TMP 1/4 mile 11/3/07](https://forums.speedlife.net/t/tmp-1-4-mile-11-3-07/38102/5):
>
> Check voltage, they can run quite shitty without having trouble starting if the alternator output is low.
> 
> Did you check for boost leaks?

I’m going to button it back up today or tomorrow afternoon and see how it runs now. Again, if you read _this_ thread you’d see that I found **both** cam gears were off a tooth or two. It’s very likely that was causing the idle issues, I figure I might as well get it back together and check and see before moving on to other tests.

Thanks.

-TJ

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