GMPP ASA or Stage II Cam?
11-27-2013, 01:38 PM
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GMPP ASA or Stage II Cam? I have an LS1, T56 from a 2002 Camaro in a 2500 lb Miata with a 3.55 rear end. The engine is stock except for the cam, springs and tune.
My current cam is Lunati 220i/224e .575" 112 LSA which I like but it’s pretty tame. I’d like something with a flatter power curve and easier on the valve train. I enjoy a nice choppy idle but do need to be able to run A/C rolling down the road at 1800 rpm.
I am on the fence between going with GMPP ASA, 226i/236e .525" 110 LSA or the GMPP Stage 2, 227i/239e .551" 108 LSA
Not many guys are running the Stage II to read much about. So what do you guys think ASA or Stage II?
My current cam is Lunati 220i/224e .575" 112 LSA which I like but it’s pretty tame. I’d like something with a flatter power curve and easier on the valve train. I enjoy a nice choppy idle but do need to be able to run A/C rolling down the road at 1800 rpm.
I am on the fence between going with GMPP ASA, 226i/236e .525" 110 LSA or the GMPP Stage 2, 227i/239e .551" 108 LSA
Not many guys are running the Stage II to read much about. So what do you guys think ASA or Stage II?
11-27-2013, 02:15 PM
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Well both those cams have less lift than what you have now, but with a nice jump in duration, and similar LSA. They still should make a little more power though. Why so low on the lift if I may ask?
11-27-2013, 03:00 PM
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I might be out to lunch on this but I am thinking Low lift for reliability, longevity and because from what I am reading with stock heads .525 to .575 really makes no difference in performance. The springs I am running are good to .600 but I figure if I go lower I’ll never have to change them. Hope that makes sense...
11-27-2013, 03:20 PM
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Jim,
When you choose the cam, I want a full right up. The SS's plans have been put on hold, but I want your trusted opinion on which ever cam you choose.
Love the blog, you put in a lot of work and did a great job.
When you choose the cam, I want a full right up. The SS's plans have been put on hold, but I want your trusted opinion on which ever cam you choose.
Love the blog, you put in a lot of work and did a great job.
11-27-2013, 03:53 PM
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Maybe i am wrong but i think you will gain 10 rwhp with a cam swap. If you choose one of those cams i would like to know your results. Look at my sig. My cam has a choppy idle very street friendly with alot of low end torque and pulls to 6800. Its a great cam for cam only car. It should make 380 to 400 rwhp cam only.
11-29-2013, 04:20 PM
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LOL that greatly depends on what you're reading. I have read everything from +30 to +96 with the ASA over stock... But I suspect you are spot on swapping to either cam will not be a much of a HP gain.
I am fully aware that this is lame, trollish and boarding on rice territory but 1/3rd of the reason I want to swap is because I just like a choppy nasty idle. Where I live there is no one to impress so it is just for my enjoyment. The next 3rd is to go eaiser on the valve train. My springs are good for .600 but I don’t want to change them any time soon. The other 3rd is I would like a little flatter tq curve than I have.
As I understand it the larger difference in the duration between I and E will bring on the chop and the lower LSA numbers will bring the tq numbers lower and a 10 hp gain would be fine.
No question the ASA has an amazing tq curve and my fear with the stage II is for an LS1 it might be like salt on a steak. A little is great but a lot is horrible and I think the 108 LSA is too much of a good thing for a sub LS3 motor.
So after 6 hours of research now I found a black Friday deal on the Howards version of the ASA cam that might be a good compromise between the 2. The difference is GM asa advertised duration is 286i/300e and Howards is 274i/ /285e. Supposedly the faster rates are good for 8 hp and it will still be easier on my springs that what I have now. If I decide at some point I would like a bit more lift 1.8 rockers would fix that right up.
We'll see how it goes but at $325 shipped it was hard to beat! Thanks guys I really appriciate your thoughts on this!
I am fully aware that this is lame, trollish and boarding on rice territory but 1/3rd of the reason I want to swap is because I just like a choppy nasty idle. Where I live there is no one to impress so it is just for my enjoyment. The next 3rd is to go eaiser on the valve train. My springs are good for .600 but I don’t want to change them any time soon. The other 3rd is I would like a little flatter tq curve than I have.
As I understand it the larger difference in the duration between I and E will bring on the chop and the lower LSA numbers will bring the tq numbers lower and a 10 hp gain would be fine.
No question the ASA has an amazing tq curve and my fear with the stage II is for an LS1 it might be like salt on a steak. A little is great but a lot is horrible and I think the 108 LSA is too much of a good thing for a sub LS3 motor.
So after 6 hours of research now I found a black Friday deal on the Howards version of the ASA cam that might be a good compromise between the 2. The difference is GM asa advertised duration is 286i/300e and Howards is 274i/ /285e. Supposedly the faster rates are good for 8 hp and it will still be easier on my springs that what I have now. If I decide at some point I would like a bit more lift 1.8 rockers would fix that right up.
We'll see how it goes but at $325 shipped it was hard to beat! Thanks guys I really appriciate your thoughts on this!
11-29-2013, 05:30 PM
#7
I hate to be THAT guy...but you're asking a lot from an OTS cam being an otherwise stock motor with .600 lift springs...if you're dead set on sticking with what you have and not changing top end...i'd contact a vendor for a custom cam ground to your specifications...
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11-29-2013, 06:51 PM
#9
The ramp rate/s of the cam lobes determine how aggressive a cam is, not the lift.
I'd consider either a custom 226/236 110+3 cam with Comp Cam Xtreme RPM high lift cam lobes. The I/E lift is .570"/.578" 226 is lobe #3716 and the 236 is lobe #3705. For a O.T.S. cam look at the Comp Cam #54-428-11, it's the same cam ejbta2 is running, and also uses the Xtreme RPM high lift cam lobes.
http://www.ws6project.com/user_stor/...-lift-228-230/
I'd consider either a custom 226/236 110+3 cam with Comp Cam Xtreme RPM high lift cam lobes. The I/E lift is .570"/.578" 226 is lobe #3716 and the 236 is lobe #3705. For a O.T.S. cam look at the Comp Cam #54-428-11, it's the same cam ejbta2 is running, and also uses the Xtreme RPM high lift cam lobes.
http://www.ws6project.com/user_stor/...-lift-228-230/
12-02-2013, 08:18 AM
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I sure appriciate your thoughts on this and for posting. I should have mentioned I am an autocrosser so power is good but hitting the apex right makes a much bigger difference in run times. So if I can move the tq down a little add some chop and have the springs live longer I will feel like it's a win. But don't get me wrong I am not totally warped I know you can never have too much power! It's just that I need brakes, cooling and traction way more than more power at this point...
Last edited by charchri4; 12-02-2013 at 10:50 AM.
12-02-2013, 08:51 PM
#12
I have a LS1, Howards vs ASA cam, PRC stage 1 milled .030, .040 cometic head gasket, LS6 intake, 85mm throttle body,42 lb injectors, 91mm lid, BBK headers, no cats, open borla. Dyno'd 432hp 393ft lbs on a mustang dyno.
I am now looking at a fast 92/92 set up with either 1.8 rockers or a higher lift cam.
I am now looking at a fast 92/92 set up with either 1.8 rockers or a higher lift cam.
Last edited by mgood613; 12-02-2013 at 08:52 PM. Reason: proof reading
12-02-2013, 09:04 PM
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I have a LS1, Howards vs ASA cam, PRC stage 1 milled .030, .040 cometic head gasket, LS6 intake, 85mm throttle body,42 lb injectors, 91mm lid, BBK headers, no cats, open borla. Dyno'd 432hp 393ft lbs on a mustang dyno.
I am now looking at a fast 92/92 set up with either 1.8 rockers or a higher lift cam.
I am now looking at a fast 92/92 set up with either 1.8 rockers or a higher lift cam.
12-03-2013, 06:33 AM
#16
FWIW for comparison, we once put a ASA cam in an otherwise stock LS6 long block and topped it with the GMPP 4 barrel intake and a 650 cfm Holley carb. Made 465 HP at the flywheel and about 430 torque. Have seen similar numbers with the LS6 efi.
A friend recently put an ASA cam in a stock LS2 with factory efi, headers and tune. It made 480 at the flywheel.
A friend recently put an ASA cam in a stock LS2 with factory efi, headers and tune. It made 480 at the flywheel.
