chadlet

I need to know which ones. I plan on a supercharger in the near future. With that said does one or the other work better for forced induction. Is one easier than the other to install. Need an answer quick before wife makes me spend tax refund on her.

SirKnightTG

Neither are made for FI so the gains you get (if any) will be small.

The easiest to install is the FRPP Hot Rods since they do not need a phaser limiter. I don't think installing a phaser limiter is hard, but still an extra step.

The best cams that lope and work well with FI would be Comp Cams SPR Stage 2 blower grind. Those not only require a phaser limiter, but also need new springs which will cost you good. They don't lope as much as the FRPP or Thumprs but still VERY noticable.

delstang

I guess both are fairly similar. I went with the Thumpr's and they sound awesome. Did use the phase limiters though

SirKnightTG

Yeah the Thumprs should use the limiters. You can get by without it but if something suddenly happend and the VCT couldn't "keep up" then the timing could be off in a way that a piston meets a valve. But even in this case, this won't happen with the Hot Rods...

The Hot Rods were designed by Ford to not need any valve train mods. They know the requirements needed to use their cams on their heads and the stock setup accepts the specs of the cams. The lope and overlap do not make it an issue. That's exactly what JPC told me and they were the ones who "beta tested" the Hot Rods with Ford Racing.

JPC did say to me though that they like to use springs and limiters with hot rods anyway since they make more power like that. I'm not sure exactly why that is, maybe it allows for a more aggressive tune.

But, the Thumprs will make more peak power so it just depends what you want.