Just wondering if anybody knows how much cam lift you can go on a stock L92 engine(with valvetrain upgrades ofcourse) without cutting the pistons more than they already are. I see .612s and higher on L92s but not sure if thats on the stock pistons. Im deciding on my cam now and i dont want to have to do anything to the pistons.probobly going with a custom grind from comp. going with the stock head and short block setup. Im looking to stay around .600 to .610 lift which i think will be fine.what does everyone think? thanks.

 

If the heads are stock with the valvetrain upgraded you should be safe with .610 lift. Your duration will also make a difference on your clearance. I know a guy running a Torquer V3 with stock L92 heads and stock bottom end LS2. It is 231/234 .643/.598 specs on the cam.

 

Lift has very little to do with PTV clearances. It is your duration that will get you in trouble. I wouldn't suggest more than a 228 XER lobe for proper intake clearances. It has been a while but if I remember correctly the 230 XER lobe is .06x" to .07x" clearance on a 114 LSA + 2. It is not recommended to have less than .080" on the intake & .100" on the exhaust.

 

Im still learning all this cam spec stuff but i do understand what it all means i think. If i go with a tighter LSA( say 110-112) will that give me more PTV clearance with 230 durration than say a 114 LSA at the same durration of 230? or does that not effect the PTV at all.thanks for any info..

 

You should select the cam that will meet your performance goals regardless of it needing to have valve reliefs or not. You can always flycut the pistons for added clearance. That will allow you to run a larger cam or mill the heads to increase compression. Both applications will increase performance.

 

Im just looking for a good track car and reliable to drive it there. But i also know that the L92 and LS1s like 2 completely different cam grinds from what im told. L92s benifit more from .600 or higher lift and 8-10 degree split on durration.If I cant do that on a stock bottom end and stock headed L92 then i will go smaller on the cam. Im not looking to mill heads or flycut pistons anymore than they already are . Just looking to have a cam only and bolt on L92 motor. just trying to see what options i have as far as lift, durration, LSA and all that for a custom grind on basically a stock engine other than that.

 

The narrower LSA (110-112) will give you less PTV than a wider LSA (114). However I wouldn't even think of running that much intake duration on a stock cube engine, unless you want to hurt your HP/TQ.

 

here you go check it out

http://www.compcams.com/Technical/Ca.../pdf/page9.pdf

this only if your using the VVT CAM PHASER

 

Ok. thanks for the good info. the specs i was thinking about was around a .600/.605 , 226/236 with a 112 LSA. does this look like an "OK" cam for a stock L92 or should i do something different? Not tryin to be a pain in the *** just trying to gain alittle bit more knowledge on this stuff. thanks for the help.

 

Yes i saw that in a magazine earlier today. im not using the VVT so like you said that wont work for me. I see all those cam choises use a 114 LSA. Maybe that would be the best for whatever cam i end up with.

 

Are you still wanting to use your stock 2.77:1 gears?

 

No I just got a 4L60E and a moser 12 bolt with 4:11s from a friend of mine. The trans has a 5200 converter in it now but i may have to go smaller on that.

 

here you go https://ls1tech.com/forums/generatio...am-10-80s.html

 

the link isnt working and i cant find it anywhere. can you try it again please? thanks alot

 

Good results, but a carb'd engine likes different cam timing than a fuel injected engine.

 

I would PM edcmat-l1 (site sponsor with lots of L92 experiance), he is there in VA and could get you going in many ways.