LSL/XER cam for my combination?
09-15-2011, 12:07 AM
#1
LSL/XER cam for my combination? 02 z28 m6
ssra
slp lid
ls6 manifold
p&p TB
241 heads with light porting and bowl work
tsp 1 7/8 LT's
tsp ory
corsa catback
stock 10 bolt w/ 4.10's
diamond stage 2 clutch
will be putting in a lunati dual spring kit and possibly milling the heads depending on PTV clearance (would like to have compression at 11.5:1 to take advantage of the cam size)
Looking to go with an LSL/XER lobed 235/242 .621/.610 110+4
I want it on a 110 or 111 to create some good overlap, trying to make some more torque (average not peak) out of a bigger cam and +3 or +4 so i wont have to rev it to the moon(dont want to have to rev it to 7k)
Eventually going with some afr 205's most likely
Does anyone have experience with LSL/XER cams and what kind of power should this particular combination make?
*This is a street/strip combo but naturally the "strip" part will be limited without a built rear.
ssra
slp lid
ls6 manifold
p&p TB
241 heads with light porting and bowl work
tsp 1 7/8 LT's
tsp ory
corsa catback
stock 10 bolt w/ 4.10's
diamond stage 2 clutch
will be putting in a lunati dual spring kit and possibly milling the heads depending on PTV clearance (would like to have compression at 11.5:1 to take advantage of the cam size)
Looking to go with an LSL/XER lobed 235/242 .621/.610 110+4
I want it on a 110 or 111 to create some good overlap, trying to make some more torque (average not peak) out of a bigger cam and +3 or +4 so i wont have to rev it to the moon(dont want to have to rev it to 7k)
Eventually going with some afr 205's most likely
Does anyone have experience with LSL/XER cams and what kind of power should this particular combination make?
*This is a street/strip combo but naturally the "strip" part will be limited without a built rear.
09-15-2011, 10:42 AM
#2
With that duration, you will need to flycut whether or not you mill the heads. Since you are milling, why not bump the SCR up to 11.9-12:1?
BTW, I use my AFR 205's for the bigger cam set ups because of the extra PTV clearance they provide. Granted the SCR is lower, but, the deeper combustion chamber helps.
BTW, I use my AFR 205's for the bigger cam set ups because of the extra PTV clearance they provide. Granted the SCR is lower, but, the deeper combustion chamber helps.
09-15-2011, 03:47 PM
#3
You're sure that it will need flycutting? I don't want to if I don't have to. If that were the case the cam would be larger if I was going through with the extra work.
The duration is fine, its the lobe seperation and advance that would need changing but that would also effect the valve events. Any other opinions?
The duration is fine, its the lobe seperation and advance that would need changing but that would also effect the valve events. Any other opinions?
09-15-2011, 08:54 PM
#4
That size cam pretty much only fits w/unmilled stock heads which becomes
less than ideal @ 10.19 compression. Trickflow heads and Mast heads can
sneak larger sticks in w/o flycutting because of the rolled over valve angle.
You really have to mill the snot outta 241s to get 11.5+. I cut .030 and
ended up about 10.7 w/stock mls gaskets.....040 cometics would help
another 0.3-0.4....a dual quench chamber like 243s would be a better
starting point if you really want the high comp.
less than ideal @ 10.19 compression. Trickflow heads and Mast heads can
sneak larger sticks in w/o flycutting because of the rolled over valve angle.
You really have to mill the snot outta 241s to get 11.5+. I cut .030 and
ended up about 10.7 w/stock mls gaskets.....040 cometics would help
another 0.3-0.4....a dual quench chamber like 243s would be a better
starting point if you really want the high comp.
09-15-2011, 09:27 PM
#5
You're sure that it will need flycutting? I don't want to if I don't have to. If that were the case the cam would be larger if I was going through with the extra work.
The duration is fine, its the lobe seperation and advance that would need changing but that would also effect the valve events. Any other opinions?
The duration is fine, its the lobe seperation and advance that would need changing but that would also effect the valve events. Any other opinions?
One way to find out; install everything with just a couple of head bolts torqued & measure w/ clay. From what I've tried, it's gonna need flycutting. It is possible to flycut w/ engine in car.
Largest cam I've been able to use on 241's without flycutting is a 224/228, .581"/.583", 112LSA on a 110 ICL & .040" cometics. LSA can help, but, is not enough by itself, IME. Further, as soon as we milled .030", she needed a little flycut to get proper PTV clearance.
09-15-2011, 10:29 PM
#6
So say I figured out an lsa and advance that worked fine with the stock heads, would it basically be a dog until I put a set of good heads on it? (Afr 205 or Tfs 215)
I'm not going to use the the idea of 243's becuase the PTV is going to be the same as stock and by the time I get them to flow what they should it'll be almost as much as the aftermaket heads. (And I know TEA/A.I. 243's make good power, I'm just not convinced on using them for this combo)
I'm not going to use the the idea of 243's becuase the PTV is going to be the same as stock and by the time I get them to flow what they should it'll be almost as much as the aftermaket heads. (And I know TEA/A.I. 243's make good power, I'm just not convinced on using them for this combo)
