Anybody know the base circle on this cam?
#1
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
It's a Comp XR228/230 571/573 112 LSA comp pt# 54-428-11 I am wanting to find this out so I can order the correct pushrods at the same time I order the cam and springs. Also what is the base circle on the stock 2000 cam?
#4
TECH Fanatic
iTrader: (10)
Join Date: Aug 2004
Location: Rochester,Ny
Posts: 1,433
Likes: 0
Received 0 Likes
on
0 Posts
![](https://ls1tech.com/forums/images/ranks/ls1tech10year.png)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
okay the stock cam radius is .775" and diameter is 1.550 ..
comp 228/230 radius is .732" and diameter is 1.463
I am using a 7.4 pushrod with a .045 cometic head gasket and heads milled .018..If using stock heads and stock head gaskets then use 7.425" pushrods
comp 228/230 radius is .732" and diameter is 1.463
I am using a 7.4 pushrod with a .045 cometic head gasket and heads milled .018..If using stock heads and stock head gaskets then use 7.425" pushrods
#6
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Originally Posted by redtail2426
okay the stock cam radius is .775" and diameter is 1.550 ..
comp 228/230 radius is .732" and diameter is 1.463
I am using a 7.4 pushrod with a .045 cometic head gasket and heads milled .018..If using stock heads and stock head gaskets then use 7.425" pushrods
comp 228/230 radius is .732" and diameter is 1.463
I am using a 7.4 pushrod with a .045 cometic head gasket and heads milled .018..If using stock heads and stock head gaskets then use 7.425" pushrods
![Driving](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_driving3.gif)
Trending Topics
#8
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Originally Posted by PREDATOR-Z
Yeah that is a XE lobe. I agree with 7.425 on cam only swap.
![Icon Confused](https://ls1tech.com/forums/images/smilies2/icon_confused.gif)
#10
Staging Lane
iTrader: (1)
Join Date: Sep 2006
Location: Chesterfield, MI
Posts: 67
Likes: 0
Received 0 Likes
on
0 Posts
![](https://ls1tech.com/forums/images/ranks/ls1tech10year.png)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
2000 base circle (radius) is 19.7 mm (double if if you're gonna measure it with calipers) 01 ls6 is 19.3mm and 02+ is 19.0mm. The valves on 02+ are .6mm longer to compensate for smaller base circle (that's .02366" so 7.425" pushrods are right if it's similar to ls6 base circle....)
#11
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
I am about to get a Comp XE cam also. I have 7.4" pushrods on my stock heads and cam. I am going to have the heads milled to a 62cc chamber and use a .040" headgasket. Best I can figure I will still be good with the 7.4" pushrods. Anyone agree or disagree?
#12
TECH Senior Member
iTrader: (23)
Join Date: Aug 2005
Location: Watertown, NY
Posts: 8,797
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Originally Posted by 1CAMWNDR
I am about to get a Comp XE cam also. I have 7.4" pushrods on my stock heads and cam. I am going to have the heads milled to a 62cc chamber and use a .040" headgasket. Best I can figure I will still be good with the 7.4" pushrods. Anyone agree or disagree?
My XE cam lobes measured in at 1.450 with a dial caliper.