Quote:
Originally Posted by pkj
it seems the solid lifter cam will benifit the engine from idle to 6000 rpm. thanks pkj
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Well I'm not an expert but I'll throw in my .02 worth. I'm going to assume you've got that impression by using an engine simulation program such as DeskTop Dyno? First I'll say that you could very well get across the board gains as indicated by programs such as desktop dyno but only if you use the aggressive solid lifter cam profiles that are typically used for race applications. There are some of the short track solids that could work for your larger small block. Comp has cams in the 230-240 duration @
.050 lift with 106 LCAs that would work with your compression, gearing and 4 speed tranny. When looking at the cam recommendations remember you're building a 400cid motor and most of their recommendations are based on a 350 unless they specify otherwise. The extra cubes will lower the peak torque and HP RPMs by 200 to 500 RPM.
The upside is a mean sounding lope at idle and very strong midrange torque when you use one of these short track cams on the street.
The downside is the aggressive profiles might not live to long on a street engine. Your valvetrain components and geometery have to right, the more aggressive the ramps the less margine of error you are allowed. When you use these types of cams you will be able to really feel the engine comes up on the cam but the engine will be somewhat peaky. A lot of fun if you like putting the pedal to the floor, but not ideal for a cruiser or for MPG.
If your trucks basicly a toy I say why not. If its you primary means of transportation I wouldn't recomend this type of cam.