Cam, Compression etc
Thread Starter
Pro
Joined: Jul 2008
Posts: 666
Likes: 2
From: Weston WV
Cam, Compression etc
I have a 2001 stock bottom end.
Put a cam in it based on ... 1 it was available, and 2 i was planting on going with an A&A supercharger.
The cam is a 239/247 .624/.624 on a 114 LSA... love the way it sounds, plain nasty.
other mods are a set of ported 241 heads.
GM MLS head gaskets.
4:11 gears
xs power 1 3/4 long tubes into a custom cat back.
ported LS6 intake and 85MM throttle body.
I am wanting a bit more torque ... and sooner... would bumping the compression by milling the heads help . ... I have also noticed that when doing WOT pulls the car burns a bit of oil... every time.. I"m wondering if i should step up to ARP head studs instead of the stock style head bolts ( bought new with the head swap)
my last dyno which flat lined at 5700 RPM presumably due to stock throttle body and MAF. after porting the LS6 and the bigger throttle body and a much better air intake than the freebie i had on there the car very noticeable picked up in the HP range.. but of course all above 3700 RPM.
Thanks guys!
Put a cam in it based on ... 1 it was available, and 2 i was planting on going with an A&A supercharger.
The cam is a 239/247 .624/.624 on a 114 LSA... love the way it sounds, plain nasty.
other mods are a set of ported 241 heads.
GM MLS head gaskets.
4:11 gears
xs power 1 3/4 long tubes into a custom cat back.
ported LS6 intake and 85MM throttle body.
I am wanting a bit more torque ... and sooner... would bumping the compression by milling the heads help . ... I have also noticed that when doing WOT pulls the car burns a bit of oil... every time.. I"m wondering if i should step up to ARP head studs instead of the stock style head bolts ( bought new with the head swap)
my last dyno which flat lined at 5700 RPM presumably due to stock throttle body and MAF. after porting the LS6 and the bigger throttle body and a much better air intake than the freebie i had on there the car very noticeable picked up in the HP range.. but of course all above 3700 RPM.
Thanks guys!
Instructor
Joined: Dec 2011
Posts: 188
Likes: 0
From: Fredonia Wisconsin
That cam definitely needs a forced induction set up to make mad HP.,
however if you're considering staying NA I'd put a set of Total Engine
Airflow stage1 243s milled to 60cc chamber volume and a set of .040"
Cometic head gaskets which will raise your compression to about 11.4
to one and with a retune should bring the torque band in about a 1000
rpms sooner as well as add another 20-25 rwhp in the curve. I'm
about to install my TEA 243 heads which have the hollow stem ZO6
valves...can't wait as most everyone loves their work.
however if you're considering staying NA I'd put a set of Total Engine
Airflow stage1 243s milled to 60cc chamber volume and a set of .040"
Cometic head gaskets which will raise your compression to about 11.4
to one and with a retune should bring the torque band in about a 1000
rpms sooner as well as add another 20-25 rwhp in the curve. I'm
about to install my TEA 243 heads which have the hollow stem ZO6
valves...can't wait as most everyone loves their work.
Safety Car
Joined: Aug 2011
Posts: 4,440
Likes: 406
From: Portland OR
The head bolts won't have anything to do with the oil smoke.
That cam is pretty healthy, it's not really a blower cam. You didn't mention valve springs used? Or rockers? Thats a lot of lift for the stockers.
It should make power to 6500 or so, not stop at 5700.
I have a much smaller cam, 226/230 and it power peaks right around 6400. Torque peak is right at 5000.
Compression would help a bit, but a smaller cam would get the torque in earlier.
Ron
That cam is pretty healthy, it's not really a blower cam. You didn't mention valve springs used? Or rockers? Thats a lot of lift for the stockers.
It should make power to 6500 or so, not stop at 5700.
I have a much smaller cam, 226/230 and it power peaks right around 6400. Torque peak is right at 5000.
Compression would help a bit, but a smaller cam would get the torque in earlier.
Ron
