Hello from Germany

[Max Power]

Originally Posted by olddog

Based on what I wrote earlier, just stroking your engine would give you a peak hp at 5700 rpm. That said, is your engine peaking at 6600 because you are starting to loose control of the valves? Looking at your dyno chart, I am puzzled at the rather steep drop in torque starting around 5300 rpm. I would have expected a more gradual drop off in the beginning. So I am not enough of an expert here. I would advise a good valve train for any engine. Good roller rockers and new valve springs for sure. I suspect your cam would make more torque to a high rpm with better springs, therefore after stroking the engine I think it will peak above 5700 rpm. I cannot be sure though. Let's see what some others think.

Again I would recommend contacting BLYKINS. I think he could set you up with a better cam than you have and a better cam than comp will recommend. I believe he uses Comp and specs the lobes himself. He most likely can purchase your parts and ship them to you for about the same money. He builds a lot of engines and does it for a living.

thanks for the reply

the heads were ported by Ford Performance Solutions in Kali. Troy also ground the cam based on the head flow post porting. He installed the springs and my mechanic in the NL double checked the springs to make sure they were correct. I will contact Herr Lykins for his suggestion on what cam to grind.

at the end of the day, the fact that I am making 355 hp at the rear wheels behind a C6 tranny means I am making some pretty good power at the crank for a 351W.

All things being equal, should I expect to see a power bump by upping the CIs on this engine, keeping the cam, heads, and intake the same? I saw an episode of engine masters where they put the same heads, intake, and cam from a 350 on a stroker and it only gained 10 hp. Was that anamoly?

[cycleguy55]

Originally Posted by Max Power

I saw an episode of engine masters where they put the same heads, intake, and cam from a 350 on a stroker and it only gained 10 hp. Was that anamoly?

There's not enough information about the state of those heads, intake, and cam to be able to respond in any meaningful way. If they were "the weak link in the chain" they would certainly restrict any gains from stroking the engine.

OTOH, if your heads, intake, and cam have untapped potential you can see significant gains from stroking. Brent Lykins or another quality engine builder is in a far better position to assess that than I am.

Edit: I'm no engine building expert, but that dyno chart tells me your heads, intake and cam are all supporting high RPM breathing. Conclusion: That engine would likely benefit from more stroke.