Dyno#s with Cosworth cams and camgear settings!!
Stock specs for the Cossie cams are 107/113, with a LSA of 110 deg. On paper, this makes for a good street setting with decent idle.
Retarding the exhaust cam to -4 changes things to a 107/105, with a LSA of 106 deg, which is too tight for these cams.
Retarding the exh cam to -2 changes things to 107/109, with a LSA of 108, which should be a bit better than the previous setting.
FWIW, more peak power should be attainable by returning the exh cam to the -4 setting, and retarding the intake to -2.
Retarding the exhaust cam to -4 changes things to a 107/105, with a LSA of 106 deg, which is too tight for these cams.
Retarding the exh cam to -2 changes things to 107/109, with a LSA of 108, which should be a bit better than the previous setting.
FWIW, more peak power should be attainable by returning the exh cam to the -4 setting, and retarding the intake to -2.
nice findings mate!
solid gains!
cant wait to see the dynographs and i want to see how the powerband moved!!!
probably i will do my own testing too when i come back from vacation... i was pretty sure that we could find gains on the adjustment on the exhaust cam...
these tests show that we could benefit even more if we had MIVEC on both cams....
solid gains!
cant wait to see the dynographs and i want to see how the powerband moved!!!
probably i will do my own testing too when i come back from vacation... i was pretty sure that we could find gains on the adjustment on the exhaust cam...
these tests show that we could benefit even more if we had MIVEC on both cams....
Stock specs for the Cossie cams are 107/113, with a LSA of 110 deg. On paper, this makes for a good street setting with decent idle.
Retarding the exhaust cam to -4 changes things to a 107/105, with a LSA of 106 deg, which is too tight for these cams.
Retarding the exh cam to -2 changes things to 107/109, with a LSA of 108, which should be a bit better than the previous setting.
FWIW, more peak power should be attainable by returning the exh cam to the -4 setting, and retarding the intake to -2.
Retarding the exhaust cam to -4 changes things to a 107/105, with a LSA of 106 deg, which is too tight for these cams.
Retarding the exh cam to -2 changes things to 107/109, with a LSA of 108, which should be a bit better than the previous setting.
FWIW, more peak power should be attainable by returning the exh cam to the -4 setting, and retarding the intake to -2.
Unless of course you are speaking of MIVEC programming. One still cannot achieve -2* on MIVEC intake unless you install the gear one tooth off and adjust MIVEC accordingly. LOL
Ah ok, it's a IX. 
I like the idea of MIVEC, but the 107 deg int LC on this cam set is a bit too far advanced for best power. An adjustable int cam gear would be useful with MIVEC, just for getting a desirable static preset. Assuming MIVEC has enough control, the one-tooth-off substitute may hold some merit.
I like the idea of MIVEC, but the 107 deg int LC on this cam set is a bit too far advanced for best power. An adjustable int cam gear would be useful with MIVEC, just for getting a desirable static preset. Assuming MIVEC has enough control, the one-tooth-off substitute may hold some merit.
Last edited by Ted B; Jul 21, 2007 at 12:01 PM.
Whats the most you can advance/retard the intake cam with the mivec?
But you failed to understand that CFT's mustang dyno is known to read close to a dyno jet with a 5-6% difference (lower)
The numbers are good, especially in 100* weather, although it's likely that there is a built-in correction factor calculated by the weather station.
Anyway, you know the CFT dyno doesn't read 15% lower, so don't try that again. Just be happy with your numbers as they are and go prove it at the track. You wouldn't want to trap less than 115 and then have to start making excuses. Go out and trap 118-119 like you claim the other cars did with the same numbers. That would be very impressive.
Anyway, you know the CFT dyno doesn't read 15% lower, so don't try that again. Just be happy with your numbers as they are and go prove it at the track. You wouldn't want to trap less than 115 and then have to start making excuses. Go out and trap 118-119 like you claim the other cars did with the same numbers. That would be very impressive.
