I need help picking a cam
Thread Starter
TECH Regular
Joined: May 2003
Posts: 404
Likes: 0
From: Jacksonville, FL
I need help picking a cam A friend sentme a link to cmotorsports. They have a variety of turbo cams but I'm not sure which will work best with my setup.
http://cmotorsports.com/engine/ls1-l...ft-design.html
Here's more or less the setup. I want to make 600+rwhp with out too much trouble.
8.5:1 - 9:1 compression pistons
stock 346 bored .005 over
I'm planning to run a T76 w/ .81 or .96 exhaust
10-12psi
obvious fuel upgrades etc.
918 valve springs and ti retainers
I want a cam that makes good power all around, but is able to spin to 6500 or so. I don't daily drive the car, and can put up with some mild driveabilty issues there's more power to be found.
ST-220XR 220/214 duration, .564"/.559", 114lsa
ST-222X 222/218 duration, .566"/.563", 114lsa
ST-224XH 224/218 duration, .581"/.563", 114lsa
ST-226XR 226/220 duration, .570"/.564", 114lsa
ST-226X 226/222 duration, .570"/.566", 114lsa
ST-228XH 228/224 duration, .588"/.581", 114lsa
ST-228X 228/224 duration, .571"/.568", 114lsa
ST-230X 230/224 duration, .573"/.568", 114lsa
ST-230XH 230/224 duration, .592"/.581", 114lsa
ST-232XR 232/226 duration, .575"/.570", 114lsa
ST-234XR 234/228 duration, .598"/.588", 114lsa
Any of these look ideal?
http://cmotorsports.com/engine/ls1-l...ft-design.html
Here's more or less the setup. I want to make 600+rwhp with out too much trouble.
8.5:1 - 9:1 compression pistons
stock 346 bored .005 over
I'm planning to run a T76 w/ .81 or .96 exhaust
10-12psi
obvious fuel upgrades etc.
918 valve springs and ti retainers
I want a cam that makes good power all around, but is able to spin to 6500 or so. I don't daily drive the car, and can put up with some mild driveabilty issues there's more power to be found.
ST-220XR 220/214 duration, .564"/.559", 114lsa
ST-222X 222/218 duration, .566"/.563", 114lsa
ST-224XH 224/218 duration, .581"/.563", 114lsa
ST-226XR 226/220 duration, .570"/.564", 114lsa
ST-226X 226/222 duration, .570"/.566", 114lsa
ST-228XH 228/224 duration, .588"/.581", 114lsa
ST-228X 228/224 duration, .571"/.568", 114lsa
ST-230X 230/224 duration, .573"/.568", 114lsa
ST-230XH 230/224 duration, .592"/.581", 114lsa
ST-232XR 232/226 duration, .575"/.570", 114lsa
ST-234XR 234/228 duration, .598"/.588", 114lsa
Any of these look ideal?
when you say 600+rwhp is that race or pump gas.
youll probably need about 13psi or more.
tuning it with 91 for 600rwhp will be challenging, easier if you got alki injection.
definatly go with a .96Ar or bigger.
for the cam the 230/224 would be ok, bigger duration turns to less streetabilty but more power
youll probably need about 13psi or more.
tuning it with 91 for 600rwhp will be challenging, easier if you got alki injection.
definatly go with a .96Ar or bigger.
for the cam the 230/224 would be ok, bigger duration turns to less streetabilty but more power
Thread Starter
TECH Regular
Joined: May 2003
Posts: 404
Likes: 0
From: Jacksonville, FL
Originally Posted by smokinHawk
when you say 600+rwhp is that race or pump gas.
youll probably need about 13psi or more.
tuning it with 91 for 600rwhp will be challenging, easier if you got alki injection.
definatly go with a .96Ar or bigger.
for the cam the 230/224 would be ok, bigger duration turns to less streetabilty but more power
youll probably need about 13psi or more.
tuning it with 91 for 600rwhp will be challenging, easier if you got alki injection.
definatly go with a .96Ar or bigger.
for the cam the 230/224 would be ok, bigger duration turns to less streetabilty but more power
What kind of driveabilty will be sacrificed with a higher duration cam and will there be worth while benefits higher in the rpm range?
I'm ultimately planning to have a water injection setup and feel you are correct right about the .96 turbine housing.
With a lower compression ratio, I'll be able to run more boost but also making less hp per pound of boost. What would be safe on 93 octane? I'm probably leaning towards the 9:1 diamond pistons, but thought about having a custom set of JE 8.5:1 pistons made.
Also, what real world results should I exspect with race gas instead of straight 93. How much boost are you guys finding to be safe?
hard saying what real diffences youll see with the different type cams.
dont think we have solid testing done yet, just speculation.
as far as the bigger duration, with the trubo you wont need to much
you might be better suited picking something a little smaller. like a 228/224-115 or 116
there are some threads over the www.turbobuick.com boards comparing race gas to alki injection, try a search there, cant remember what the outcome was.
dont think we have solid testing done yet, just speculation.
as far as the bigger duration, with the trubo you wont need to much
you might be better suited picking something a little smaller. like a 228/224-115 or 116
there are some threads over the www.turbobuick.com boards comparing race gas to alki injection, try a search there, cant remember what the outcome was.
Terry at Cam Motion would consider that 230/224 to be on the big side for a stock cube LS1. He says that most turbo cams are 70% as big as a FI cam in the same displacement engine. He might think you will have a soggier low end and marginal increases beyond say running a 226/220 cam. Keep in mind when you size cams, that you need to pick the best cam for:
-your engine displacement
-rpm limits
-hp limits
I'd try that one you picked and see what happens, because if I talk you into a smaller cam you will be mad at me.
PSJ
230/237//115/+2 guy
-your engine displacement
-rpm limits
-hp limits
I'd try that one you picked and see what happens, because if I talk you into a smaller cam you will be mad at me.
PSJ
230/237//115/+2 guy
TECH Resident
Joined: Nov 2002
Posts: 868
Likes: 0
Originally Posted by 1point3liter
A friend sentme a link to cmotorsports. They have a variety of turbo cams but I'm not sure which will work best with my setup.
http://cmotorsports.com/engine/ls1-l...ft-design.html
Here's more or less the setup. I want to make 600+rwhp with out too much trouble.
8.5:1 - 9:1 compression pistons
stock 346 bored .005 over
I'm planning to run a T76 w/ .81 or .96 exhaust
10-12psi
obvious fuel upgrades etc.
918 valve springs and ti retainers
I want a cam that makes good power all around, but is able to spin to 6500 or so. I don't daily drive the car, and can put up with some mild driveabilty issues there's more power to be found.
ST-220XR 220/214 duration, .564"/.559", 114lsa
ST-222X 222/218 duration, .566"/.563", 114lsa
ST-224XH 224/218 duration, .581"/.563", 114lsa
ST-226XR 226/220 duration, .570"/.564", 114lsa
ST-226X 226/222 duration, .570"/.566", 114lsa
ST-228XH 228/224 duration, .588"/.581", 114lsa
ST-228X 228/224 duration, .571"/.568", 114lsa
ST-230X 230/224 duration, .573"/.568", 114lsa
ST-230XH 230/224 duration, .592"/.581", 114lsa
ST-232XR 232/226 duration, .575"/.570", 114lsa
ST-234XR 234/228 duration, .598"/.588", 114lsa
Any of these look ideal?
http://cmotorsports.com/engine/ls1-l...ft-design.html
Here's more or less the setup. I want to make 600+rwhp with out too much trouble.
8.5:1 - 9:1 compression pistons
stock 346 bored .005 over
I'm planning to run a T76 w/ .81 or .96 exhaust
10-12psi
obvious fuel upgrades etc.
918 valve springs and ti retainers
I want a cam that makes good power all around, but is able to spin to 6500 or so. I don't daily drive the car, and can put up with some mild driveabilty issues there's more power to be found.
ST-220XR 220/214 duration, .564"/.559", 114lsa
ST-222X 222/218 duration, .566"/.563", 114lsa
ST-224XH 224/218 duration, .581"/.563", 114lsa
ST-226XR 226/220 duration, .570"/.564", 114lsa
ST-226X 226/222 duration, .570"/.566", 114lsa
ST-228XH 228/224 duration, .588"/.581", 114lsa
ST-228X 228/224 duration, .571"/.568", 114lsa
ST-230X 230/224 duration, .573"/.568", 114lsa
ST-230XH 230/224 duration, .592"/.581", 114lsa
ST-232XR 232/226 duration, .575"/.570", 114lsa
ST-234XR 234/228 duration, .598"/.588", 114lsa
Any of these look ideal?
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I agree with stealth, get a professional to spec the cam for you. The cam that I am going with in my 408 is a 231/228 .591 .574 112...as recommended by Terry at Cam Motion. He said that the car should make great power between 3000-6800, right where I want it.
