View Poll Results: Pick one
230/244 .613/.630 112 LSA +2
3
20.00%
232/236 .585/.600 114 LSA
3
20.00%
234/246 .615/.625 114 LSA +2
9
60.00%
Voters: 15. You may not vote on this poll
Which cam for a 408?
Which cam for a 408? The setup is a 408 and AFR 225cc heads with a final compression of 8.4:1. The blower is an F1-C pushing 19-22psi at 6800-7000 RPM. I spoke with few people and I have an narrowed down my choice to 3 cams. Which cam should I go with?
Originally Posted by ty_ty13
is this car a street car or race car?
The car will not have A/C, but it can be used on the street. Of course it will not be a daily driver. I will define it as a race car once i drop a TH400 in it. Until then i will consider it a weekend fun/strip car.
i picked the last one because it has the biggest int./ex. slpit.... blowers need a big split but i dont think it needs to be that big of a duration... or lift.... but thats just me... mine is a th350 408 home ported 241 heads with 4.10 gears 28'' tires.
Originally Posted by ty_ty13
i picked the last one because it has the biggest int./ex. slpit.... blowers need a big split but i dont think it needs to be that big of a duration... or lift.... but thats just me... mine is a th350 408 home ported 241 heads with 4.10 gears 28'' tires.
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Originally Posted by ty_ty13
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Originally Posted by LSs1Power
That cam with a D-1SC is going to peak really early in a 408. With a D-1SC running 3.4 pulley and 7.25 crank you will need 7000-7100 RPM to max out the D-1SC. So you don't want a cam that starts dropping off at 6200-6400 RPM because you will not be able to use fully the D-1SC. Just my opinion.
Originally Posted by ty_ty13
i have a 7.625 crank....
Originally Posted by LSs1Power
Then you will need 6800 RPM to max the D-1SC out. If you dont have the cam already look for another one... If you have it use and see what it does.
Originally Posted by ty_ty13
i dont want to run 62 or 64k rpms... i want it to hit right about 58.5 - 60k impeller speed.... maxing out a blower doesnt always mean faster because at a certain point theres just hot air... depending on the climate ofcourse...
Originally Posted by LSs1Power
You make a good point there... When are you going to dyno your car? Im interested to see the powerband with your setup.
but dont get me wrong everyone has different intentions for their setup... and if you plan to drive your car on highways and race it on the interstates then im sure that will suit you well because a high power band is what street racing is.... plus im sure it will sound good too...
I have a 236/245//598/608//115 in mine and it is great. I would do the last one, but remove the advance and increase the LSA. For FI applications there is no need to have any advance in the cam.
Can you explain why you feel this way? I'm no cam expert, but I would think with the correct valve timing some advance may be necessary to acheive your target numbers. Usually, advancing will sacrifice a few peak ponies and produce more average through out the curve.
Thanks
Thanks
