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I spoke with a rep from one of the stroker kit suppliers and he said that the off the shelf cams aren't designed for the stroker (this is for a BB) motor. Not meaning a smaller diameter base circle even, but just the grind needs to be suited for the different characteristics of the stroker.
Is this accurate? He said they would design/grind a cam suited for the motor, car, gearing, etc. Instead of using a pre-made cam (designed for non-stroker applications) that I could get from one of the cam companies.
I see in the latest issue of Hot Rod Magazine that they do a build up of a BB stroker and use A Crane Cams "Saturday Night special" hydraulic cam which is an "off the shelf" variety cam.
I think that something off the shelf would go nicely in a stroker... because if theres a cam for a 502/502... theres more then likely a cam for anything in between!
I'd call up comp cams or isky... and ask their opinion.
The word "stroker" is thrown around nowdays like it is something special. A 454 is a "stroker" 427 and it doesn't require a special cam grind. You just have to match the cam to the cubic inch/characteristics you want in the motor.
If you use the identical cam in a 454 and a 502 the cam will have the characteristics of being smaller in the 502 and being larger in the 454. It may have a rough idle in the 454 and a smooth idle in the 502. It may have a power band of 2500 to 6500 rpm in the 454 and a RPM band of 2000 to 6000 RPM in the 502.
So basically for street use you would need to choose a cam that is slightly more of an aggressive grind than you would for a 454 to get the same characteristics.
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Re: special cam grind for stroker ? (Pete79L82)
I think the concern is that some stroker motors can have the rods run into the cam if the set up of the two is wrong. I know some strokers can only run certain cams due to this, but that's the extent of my knowledge on this.
I would check with a company such as Comp or Crane Cams or Lunati (they make cams and stroker kits) for more information.