Cam Question?

[Juan_Hong_Loe]

Alright, fixing to start getting engine components and I have a question for you guys. How does lift and duration on a cam convert to horseower and torque? I know that the more lift you have the valve opens up more and the more duration you have, makes it stay open longer. So how do I know what cam size to get? I am building a 383 stroker with a TPI setup off a 89 camaro. I want bottom end torque and decent horsepower throughout the RPM Range. Not sure if thats feesable or not but if it is that is what I want. So school me on this, please. Also no power additives like NOS or Boost. dunno

Daniel

 

[John Galbreath Jr.]

Not to answer your question , but I have a new cam that came with my 383HT (high torque) motor from GM Performance. I put another in trying to get a little lope. New, nver cranked with this cam. Need it, make offer.

http://store.summitracing.com/partdetail.asp?part=NAL%2D12499101&view=1&N=700+150+

Hydraulic billet steel roller camshafts are installed with .431 in. intake lift, .451 in. exhaust lift and duration at .050 in. for intake is 196 and 206 for exhaust with lobe centerline at 109 degrees.

 

[Juan_Hong_Loe]

Any dyno charts on what that motor with that cam will produce?

 

[John Galbreath Jr.]

Any dyno charts on what that motor with that cam will produce?

Sure, I googled it........... search

http://www.gmhorsepower.com/HT_383.html

 

[Juan_Hong_Loe]

What cam did you go with John?

 

[blacksheep10]

To be 100% honest with you, a professional engine builder or a maker of the parts you are looking at (not a reatailer, the maker's tech department) is the only place you will get the best engine put together. I have put all kinds of cams in engines, from a couple rollers to several hydraulic flats and have come to the conclusion (after everyone telling me this) that all your components have to match perfectly to get all the power that the engine is capable of. tuning is the other step. taht is easier with a brain that talks to you. you can do what joe did and put it on a dyno, tune it there.
I would call the place that will tune the injection and ask for recommendations with your heads/intake and call a cam manufacturer.