LS3 heads/cam too much for stock springs?
#1
LS3 heads/cam too much for stock springs?
I had Patrick g spec me up a cam for an lq4 which will have ls3 heads and stock springs for a daily driven 68 camaro. He recommended a 222/226 @ .050 with .566/.570 lift, 114 +4 lsa. Stock beehive springs on an ls3 are supposed to tolerate up to .570 lift.
I did as instructed and ordered the cam from Geoff at EPS. I had hoped to install it this weekend but when I opened the box I saw that either he or comp got it wrong. instead of 226 @.050 w .570 lift on the exhaust as recommended, the exhaust lobes are 230@.050 with. 572" of lift. This cam was supposed to work with stock ls3 valve springs, which are rated at .570.
Two questions - how will this cam behave? will it be suitable for a daily driver? And will 2/1000ths of an inch matter with the stock springs? I really don't want to wait another three weeks to install my engine.
I did as instructed and ordered the cam from Geoff at EPS. I had hoped to install it this weekend but when I opened the box I saw that either he or comp got it wrong. instead of 226 @.050 w .570 lift on the exhaust as recommended, the exhaust lobes are 230@.050 with. 572" of lift. This cam was supposed to work with stock ls3 valve springs, which are rated at .570.
Two questions - how will this cam behave? will it be suitable for a daily driver? And will 2/1000ths of an inch matter with the stock springs? I really don't want to wait another three weeks to install my engine.
#5
FormerVendor
iTrader: (18)
Definitely put a spring in and a set of chromoly pushrods. I would go with a set of dual .650" springs. You could probably go with a PAC 1518 beehive spring as well. Remember you have a big intake valve so you will need a little better spring than the cam lift to control it at higher RPMs.
Jon
Jon
#6
TECH Regular
iTrader: (3)
Join Date: Nov 2001
Location: Baton Rouge, LA
Posts: 443
Likes: 0
Received 0 Likes
on
0 Posts
To the OP, would you give me a call? I'm not sure what happened and I can't tell who you are from a screen name. I will be glad to help you out what you need to do here.
Thanks.
Thanks.
#7
Car Craft article
http://www.carcraft.com/techarticles...ads/index.html
and here is what the Comp Cams XR281HR, 228/230 with 0.571/0.573 sounds like at idle, looks like he did the same swap, but with DBC
Personally, I really like the idle
http://www.youtube.com/watch?v=zsdog_LYrhM
Trending Topics
#8
TECH Fanatic
iTrader: (118)
Usually the numbers are just out of safety but not too much .
Example ; Before Comp came out with the dual springs the original 918s were rated at .625 then when the duals came out they were bumped down to .600 .
Of course nobody wants to gamble a good engine with the wrench time .
There are some tricks to get a bit more but need to know the tricks pro .
Good luck
Example ; Before Comp came out with the dual springs the original 918s were rated at .625 then when the duals came out they were bumped down to .600 .
Of course nobody wants to gamble a good engine with the wrench time .
There are some tricks to get a bit more but need to know the tricks pro .
Good luck