L92 heads, forged pistons
TECH Regular
Joined: Nov 2005
Posts: 459
Likes: 0
From: Arlington, TN
Originally Posted by StingrayCrazy
Eric, I was planning on using the stock 6.0L 4.000" bore and the L92's since my block is new. Also since I'm going FI I could use the extra meat in the cylinder walls. Any trouble with the stock 6.0L bore clearing the valves?
Frank
Frank
Why not have a set of forged pistons made that match the stock L76 pistons that way you can get forged and low compression
On The Tree
Joined: Apr 2005
Posts: 104
Likes: 0
I just got my setup running, and I am using the l92 heads with the ls1 style JE pistons #22180. I am running a cam with ~240 duration and almost .600 lift. So, I can say that the valves don't hit.............. so far!
Jimmy, sounds like a nice setup, but with the cam you're running you shouldn't have issues. the cams some of the guys including myself posting in this thread will be using are considerably larger than what you're working with tho. any dyno results with your new combo?
Originally Posted by skipperbisket
Jimmy, sounds like a nice setup, but with the cam you're running you shouldn't have issues. the cams some of the guys including myself posting in this thread will be using are considerably larger than what you're working with tho. any dyno results with your new combo?
are you having HKE build a L92 setup??? Just curious... I have not discussed what kind of driveability etc i am looking for in a cam.
Originally Posted by Forteen3GT
are you having HKE build a L92 setup??? Just curious... I have not discussed what kind of driveability etc i am looking for in a cam.
Last edited by skipperbisket; Jan 28, 2007 at 08:21 PM.
Originally Posted by corvettetimmy
I just got my setup running, and I am using the l92 heads with the ls1 style JE pistons #22180. I am running a cam with ~240 duration and almost .600 lift. So, I can say that the valves don't hit.............. so far!
Same pistons and heads too in a 403
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Originally Posted by motorbuilt
Ok...so after all this talk about L92 heads NOT fitting with normal forged pistons, they will work with those sized cams and smaller??
Thats awesome if so.
Thats awesome if so.
FormerVendor
Joined: Nov 2001
Posts: 3,065
Likes: 6
From: Houston, Tx.
Just running a random LS1 piston with L92 heads and valves and hoping it works isn't always the best plan. It might work and then again it might not work depending on lobe size and duration and any cylinder heads milling and then any valvetrain problems etc.
The exhaust valve in the L92 head is moved quite a bit and the intake is quite a bit larger and the ones I have had so far I had to cut as they would be hitting. The exhaust wasn't even close on one pair.
If you do not mill the heads though and are not using a huge cam they might even clear with a flat top. It all depends.
The exhaust valve in the L92 head is moved quite a bit and the intake is quite a bit larger and the ones I have had so far I had to cut as they would be hitting. The exhaust wasn't even close on one pair.
If you do not mill the heads though and are not using a huge cam they might even clear with a flat top. It all depends.
Originally Posted by racer7088
Just running a random LS1 piston with L92 heads and valves and hoping it works isn't always the best plan. It might work and then again it might not work depending on lobe size and duration and any cylinder heads milling and then any valvetrain problems etc.
The exhaust valve in the L92 head is moved quite a bit and the intake is quite a bit larger and the ones I have had so far I had to cut as they would be hitting. The exhaust wasn't even close on one pair.
If you do not mill the heads though and are not using a huge cam they might even clear with a flat top. It all depends.
The exhaust valve in the L92 head is moved quite a bit and the intake is quite a bit larger and the ones I have had so far I had to cut as they would be hitting. The exhaust wasn't even close on one pair.
If you do not mill the heads though and are not using a huge cam they might even clear with a flat top. It all depends.
FormerVendor
Joined: Nov 2001
Posts: 3,065
Likes: 6
From: Houston, Tx.
I really don't know seeing so few of these yet. The stock intake valve is very thin on the margin so it may work but aftermarket valves and any milling of these heads and you may need the right reliefs. I will try and measure the free drop with a stock L92 valve.
Originally Posted by TNTramair
im have -15cc diamonds in my 402. the motor was built for FI and i was gonna use the l92s. im still lookin for a cam but will i be safe on running this combo if i stay with a cam around .600 or so lift?? thanx
Originally Posted by racer7088
I really don't know seeing so few of these yet. The stock intake valve is very thin on the margin so it may work but aftermarket valves and any milling of these heads and you may need the right reliefs. I will try and measure the free drop with a stock L92 valve.
