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Ok...LS3 MN6 with 4:10 differential. All else is stock motor wise. The car does have a tune and I understand that a return is required.
What I want is neighborhood of 30 rwhp with bullet proof valve train.
I need to pass California emission testing which no longer uses the sniffer.
I understand that as long as the emission tests "ready" all is good followed up by the visual inspection.
I also understand that the lope can be a give away for a tech that is ****.
So..is it possible?
Also I tend to not go into high rpms so lower rpm power works for me.
No strip or track just cruising but I like power low.
Also anyway of having the valve train last like oem regarding servicing, under my criteria?
The car is not a DD and sees 4000-5000 miles yearly.
What might I expect best scenario for valve train servicing? And does the cams power band have a role in this?
I intend to seek out a local tuner and have a few choices. I want to get some more background information to help me with decision making and talking with the shop.
Thanks for any useful input!!
Last edited by Boomer111; Feb 2, 2016 at 08:36 PM.
A friend recently installed a cam on his extended cab full size silverado ss with an ls2 with cnc ported ls3 heads made really good power the heavy truck pulls like a car but everyone is surprised it has perfect stock like smooth idle, i do have to double check but i believe this to be the cam (see link below) Only other thing thing you need is beehive springs to go with it use your stock keepers and retainers but a set of cnc ported heads will be awesome if headers are off limits use ls7 exhaust manifolds and cats.
I have a set of ceramic coated LS 7 manifolds for sale here on Corvette Forum. They look oem but make about an additional 15 horsepower and will be a great compliment to your cam in California. They will bolt right up and are 100% emissions legal.
I have a set of ceramic coated LS 7 manifolds for sale here on Corvette Forum. They look oem but make about an additional 15 horsepower and will be a great compliment to your cam in California. They will bolt right up and are 100% emissions legal.
Oh thanks but been there done that already as well as long tubes prior. Went back to oem with the emission recall, necessary here in California to get car yearly registration.
I remember both threads now but had forgotten. Nexus9 post is a good read, in the second link you posted.
This has been a idea for some time. I just need to be 100% sure of passing emission here in California. Not looking for big power lower tq band is desired and no lope. Gonna be a small cam for sure.
Thanks for the response.
Last edited by Boomer111; Feb 3, 2016 at 09:10 AM.
I remember both threads now but had forgotten. Nexus9 post is a good read, in the second link you posted.
This has been a idea for some time. I just need to be 100% sure of passing emission here in California. Not looking for big power lower tq band is desired and no lope. Gonna be a small cam for sure.
Thanks for the response.
I have a 219/ 231 cam in an LS3 and here are the dyno results (with LS7 manifolds, CAI, and tune). It is small and has a very tiny amount of lope. Nothing that anyone would consider out of the ordinary. It was custom speced by PatG for the previous owner of my car. If you want the cam card just let me know.
I have a 219/ 231 cam in an LS3 and here are the dyno results (with LS7 manifolds, CAI, and tune). It is small and has a very tiny amount of lope. Nothing that anyone would consider out of the ordinary. It was custom speced by PatG for the previous owner of my car. If you want the cam card just let me know.
Good luck!
I might be interested in this cam as well! Also in California
Is your Vette MN6 or A6?
To the OP talk also with Ryne @ CMS in Murrietta Ca (SoCal)
I have a 219/ 231 cam in an LS3 and here are the dyno results (with LS7 manifolds, CAI, and tune). It is small and has a very tiny amount of lope. Nothing that anyone would consider out of the ordinary. It was custom speced by PatG for the previous owner of my car. If you want the cam card just let me know.
I don't know a lot about cams, but one thing I've noticed studying LS3 dyno charts and cam specs is that the exhaust duration needs to be significantly longer than the intake duration if the cam is to make a lot of power for its size. I assume this has to do with the fact that the exhaust ports on an ls3 head are known to not flow particularly well in comparison to the intake ports. So holding the exhaust valves open longer helps equalize that.
When I studied cam specs from a Super Chevy article where they dynoed and listed the specs for multiple cams, I found my cam to be about halfway between the GMSS cam, and the Katech torquer cam. If I was installing a cam today, I would probably purchase the Katech. It made more power than the other cams up to 6000 rpm and only lost a little bit up top. Either that or I would ask to Spinmonster to spec something for me.
Maybe a dumb question/suggestion, but does anyone have any results from just ported heads with the stock cam?
......GMPP LS3 heads are worth 12hp on a dyno which is probably 8 rwhp. I have never seen a stock LS3 rwhp test with TFS 255 heads(?)...but would be interested in that result.
Last edited by Wallacefl; Feb 5, 2016 at 09:07 AM.
School me on small cam
