Lq4/317 cam only recommendations
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Joined: Mar 2023
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Replying to main thread Hey man, such a long time since this thread was replied to but here I am in 2023, with a 98 C5 and just had my crappy LS1 give out on me. Cracked block. Just bought a 6.0 LQ4 with 317 heads and btr stage 1 cam. Haven't gotten it put in yet and driven it to test it but any suggestions on what else I should do? I heard 706 heads were a better option but I'm down to hear what LS1 tech and corvette forum has to say. This is my first Chevy LS car so bare with me
Joined: Apr 2006
Posts: 3,909
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From: Grand Rapids, Michigan
Get rid of the 317s. Either 243/799s or 706/862s will make more power. The latter 2 have smaller intake valves, but the compression increase more than makes up for it. Go watch Richard Holdener's comparison videos and you'll see the difference.
Thread Starter
Joined: Nov 2010
Posts: 808
Likes: 62
From: Toronto Ontario Canada
Wow this is a blast from the past thread lol. To answer how things went at that time with that setup was great. If you are keeping the 317 heads and doing a cam swap I would highly recommend milling the heads .030 to bump up the compression and be plenty safe. This will gain you a lot better response and pickup some power for minimal costs. I also suggest long tube headers. At that time before I went to my turbo setup with the milled 317 heads, 228r cam, longtube 1 7/8 headers,ls6 intake and tune my car made 399whp and 410tq . It was fun to drive with a 6spd.
*Edit* Switching heads to the 243 heads from my milled 317 heads made virtually no measurable difference to my dyno numbers btw. Do with that information as you please.
*Edit* Switching heads to the 243 heads from my milled 317 heads made virtually no measurable difference to my dyno numbers btw. Do with that information as you please.
Yup. Pretty much the same intake port, with the 317 having a bigger chamber volume area vs the 243/799.
Last edited by Che70velle; Mar 11, 2023 at 03:03 PM.
Hey man, such a long time since this thread was replied to but here I am in 2023, with a 98 C5 and just had my crappy LS1 give out on me. Cracked block. Just bought a 6.0 LQ4 with 317 heads and btr stage 1 cam. Haven't gotten it put in yet and driven it to test it but any suggestions on what else I should do? I heard 706 heads were a better option but I'm down to hear what LS1 tech and corvette forum has to say. This is my first Chevy LS car so bare with me
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Thread Starter
Joined: Nov 2010
Posts: 808
Likes: 62
From: Toronto Ontario Canada
Yup it was stock untouched dished pistons, the 317's were milled, stock ls6 intake and injectors, i think i had a oem ls1 throttle body that was ported, long tube headers.Nothing fancy with a tune got 399whp and i had a very tired 9bolt rear end with 3.23 gear.
This is going back quite sometime to remember the setup lol
This is going back quite sometime to remember the setup lol
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Joined: Jun 2016
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From: Central Cal.
