Quote:
Originally Posted by oldman
First I would agree that the MSD PT95 is a better match for the VVT-3. I don't road race but would also add this "off-the-shelf" cam is not optimized for road racing either.
Now to King's wager, I highly doubt in any street, race, drag race or anything would I choose PTB and PIntate => 95TB and MSD which adds about +6 to +12 HP from 5000 to 6600 RPM
VS
stock cam to VVT3 (even though it would be the wrong cam for this application) which yields like 45 to 80 HP with all the support listed from 4500 to 7200 RPM. There is SO much HP under the curve here and the curve is 600 RPM higher mean more time in gear, meaning more RPM into the next gear on the shift. Here is a dyno of that cam and ported stock stuff and it making 450 ft -lbs plus from 4000 to 6000 RPM, so it ain't like the cam is laying down here.
Nutshell it is HARD to overcam this engine.
So you may ask why is this not a road-race cam. Frist there all types and lengths of road racing with all types of car prep. But in general, a broad torque curve is essential. A cam with a 112 LSA is going to have a lot more mid-range torque vs 116 LSA of the VVT-3. How much, your tuner should be able to give you an estimate. Somebody with camdoctor. It is a big cam so understand the trade-off would be a really "aggressive idle". Hence one needs to work with the tuner to spec a cam that will work like you don't want a 112 LSA with 235 up duration as a DD if you ask me. So maybe 116 is a great compromise, but the compromise will be on track performance. |
Thank you, for the well-detailed response. I do agree and I do know that the MSD/95 is better for the vvt3 cam, all I'm asking is
would there still be some sort of gain going stock ported than just stock non ported? I dont road course heavily, I normally just go out once or twice a year to have some fun. and the trade-offs for the road course are worth it to me for the overall of what I use the car for.