G5X3 Piston - Valve Clearance?

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Dec 28, 2003 | 04:12 AM

Reckless

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From: Canton, GA

G5X3 Piston - Valve Clearance?

Lou, Louis, or other - what LS6 head combos are safe to run with this cam without cutting pistons? A friend is looking into buying the cam and is considering Patriot or TEA LS6 heads with bigger valves. What vlave sizes and how much milling are safe?

Thanks!

Dec 28, 2003 | 04:27 AM

Damian

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I know a guy wanting to know the same question...

Last edited by Damian; Dec 28, 2003 at 04:33 AM.

Dec 28, 2003 | 09:52 AM

AustinL911

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I, too, would also like to know.

Dec 28, 2003 | 11:43 AM

Beast96Z

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If you get the G5X-3 on a 114 LSA, it will fit with the patriot or TEA heads with 2.02 valves as long as they are NOT milled any. Your clearence will be about .205 thousandths. LG reccomends .220", but you can get by with .205". If you order the cam on a 112, flycutting is neccisary in every application unless you are using stock heads.

Dec 28, 2003 | 04:31 PM

Reckless

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Thanks Beast

Any word from LG on this?

Dec 28, 2003 | 05:29 PM

five0killr

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LG commented on this a week ago when i asked....and as far as stock heads go..no problem...but with a fair amount of milling on any other heads...you have to cut pistons

Dec 28, 2003 | 06:41 PM

Beast96Z

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Quote:

Originally Posted by Reckless

Thanks Beast

Any word from LG on this?

These are numbers I got from LG, and the X3/2.02/114 clearence is from first hand expierience.

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Dec 28, 2003 | 10:34 PM

LASTLS1

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Quote:

Originally Posted by MTI 427 C5 Roadster

So with my stock LS6 heads i DEFINITELY would not have to flycut the pistons with the g5x3 for sure on either a 112 or 114, lsa, correct?

You haven't ordered that thing yet? Pull that credit card out and get going!

Wake that yellow BEAST up! Andy

Dec 28, 2003 | 10:39 PM

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Bill00Formula

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FYI - I talked to Lou (I'm pretty sure it was him at LGM) about my setup when they were running the last special. I have MTI stage II w/ 2.055 valves and the heads are not milled. I was told fly cutting was necessary w/ the bigger valves.

I didn't discuss the 112 vs. 114 though.

Dec 28, 2003 | 10:48 PM

#11

Beast96Z

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Quote:

Originally Posted by Bill00Formula

With 2.05's you will need to cut either way. I went through that all ready.

Dec 29, 2003 | 12:31 AM

#12

Reckless

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From: Canton, GA

Yeah, that is more like a Stage 3 valve. But 2.02's should work OK without milling? Does that include a .002 or .003 clean up on the heads?

Dec 29, 2003 | 01:29 AM

#13

Godspeed

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From: Godspeed

Quote:

Originally Posted by MTI 427 C5 Roadster

So with my stock LS6 heads i DEFINITELY would not have to flycut the pistons with the g5x3 for sure on either a 112 or 114, lsa, correct?

The G5X-3 will fit with stock heads on a 114 LSA, but for a 112 would require them to be flycut. For this reason we recommend the G5X-3/114 for cam only installs. We figure if the heads are coming off you should go ahead and do a little head work too.

May 15, 2004 | 12:42 AM

#14

jdz006

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Quote:

Originally Posted by Godspeed

is the the same for the g5x2 ? 114 no need to fly cut but 112 lsa you would ? am i correct ?

May 15, 2004 | 01:15 AM

#15

02WS6#519

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What's the hp difference between the 112 and the 114 G5X-3?

Peace
Ever

May 15, 2004 | 10:49 AM

#16

WS6snake-eater

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I've got the X3 on a 112 with Patriot Stage II LS6 heads. I did NOT flycut at all. I had .210 clearance on an untorqued head. So with torquing the heads I should have been around .200

May 15, 2004 | 12:17 PM

#17

52172

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What kink of hp would I be looking at with stock ls1 heads and all the bolt ons for a cam only install? What are the specs on this cam?

May 15, 2004 | 10:10 PM

#18

98 Silver Bullet

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Just as a reference, I had heads that were milled .020 with 2.02 intake and 1.57 exhaust valves and Diamond pistons with -2 cc valve reliefs. With the G5X3 on a 112 lsa I had .160 on the exhaust side and around .230-.240 on the intake side. Keep in mind the intake valve relief is deaper than the exhaust. Without the valve reliefs, there would have no way I would be abler to run this cam.