ls2 w/ l92 heads cam question????????
#1
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
I have a stock bottom end ls2 with some l92 heads that have been milled down to 64cc combustion chambers. I need help matching a cam with this setup! I am wanting to know how big can I go without flycutting the pistons. I am wanting a pretty descent sized cam. I have a small 224 cam and am wanting to ditch that and go bigger. I have also heard that these heads respond well to a lsa like 112 or 114. Any help would be greatly appreciated! Thanks
By the way my car is an m6 so no worries about a conveter.
By the way my car is an m6 so no worries about a conveter.
#2
TECH Apprentice
iTrader: (9)
Join Date: Mar 2005
Location: Jamison, Pa
Posts: 306
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
I have a SLP 402 w/L92 heads (milled .020) with .053 head gaskets. I'm running a 236/249 646/615 112+2 cam. I have enough clearance without flycutting. I didn't beleive it so I took the shortblock/cam/heads to the guy who did the heads and he checked it again. Looks like there's plenty of room on my setup.
Bob K.
Bob K.
#3
TECH Fanatic
iTrader: (2)
Join Date: Sep 2004
Location: Kalifornia
Posts: 1,138
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
but with aftermarket pistons specialy in strokers tend to have larger valve reliefs and small dishes to lower the compression.
I don't have the Valvedrop for a l92 head with me at the moment to figure out the nominal clearance, but the lift at 110* and 106* to determine how large a cam you can use
With a 2.165 valve i'm guessing nothing larger than a low high 22X duration .588 lift. that still might be too close to call.
Tappet lift @ 110 or 106 (depending on ICL) X rocker ratio= Valve lift
Valve lift - Final valve drop (stock - total milling) + .040 safety = Valve relief Depth.
I don't have the Valvedrop for a l92 head with me at the moment to figure out the nominal clearance, but the lift at 110* and 106* to determine how large a cam you can use
With a 2.165 valve i'm guessing nothing larger than a low high 22X duration .588 lift. that still might be too close to call.
Tappet lift @ 110 or 106 (depending on ICL) X rocker ratio= Valve lift
Valve lift - Final valve drop (stock - total milling) + .040 safety = Valve relief Depth.
Last edited by Juiced; 04-26-2007 at 03:11 PM.
#5
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Originally Posted by superssport
I have a stock bottom end ls2 with some l92 heads that have been milled down to 64cc combustion chambers. I need help matching a cam with this setup! I am wanting to know how big can I go without flycutting the pistons. I am wanting a pretty descent sized cam. I have a small 224 cam and am wanting to ditch that and go bigger. I have also heard that these heads respond well to a lsa like 112 or 114. Any help would be greatly appreciated! Thanks
By the way my car is an m6 so no worries about a conveter.
By the way my car is an m6 so no worries about a conveter.
Thanks.
#6
TECH Apprentice
iTrader: (24)
Join Date: Nov 2002
Location: spring, TX
Posts: 350
Likes: 0
Received 0 Likes
on
0 Posts
![](https://ls1tech.com/forums/images/ranks/ls1tech20year.png)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Originally Posted by RGKSR
I have a SLP 402 w/L92 heads (milled .020) with .053 head gaskets. I'm running a 236/249 646/615 112+2 cam. I have enough clearance without flycutting. I didn't beleive it so I took the shortblock/cam/heads to the guy who did the heads and he checked it again. Looks like there's plenty of room on my setup.
Bob K.
Bob K.
I'm using a similar set up and cam. Do you have any Dyno #'s....