Stock Cam Guroo's,,need some advice

[willys1]

OK,,Im putting on a set of Thumper Heads.I hear other people with Thumpers say it revs alot higher now,,all the way up to 6000 rpm.I thought the stock cam only made power to 49--5000 rpm.Will my motor make more power up top now? even with the stock cam still in?

 

[RED92VERT]

When building a motor hhe heads/intake/cam should be matched. With the stock cam the motor should make more power up top, but the stock cam is really hurting the performance of the engine.

 

[vikingpower]

run 1.7 rockers to get the most of it. N/A with the HO cam you can run 12's.

 

[willys1]

I asked because I really want 430 gears!! With 430's I should be crossing the line at 54--5500 rpm.Just wanted to see if there will be any power up there!

 

[90Notch]

"Will my motor make more power up top now? even with the stock cam still in? "

Yes it will make more power up top but I'd be surprised if makes power past 5500rpm. I wouldn't run 4.30s, ported stock heads and stock cam.

 

[willys1]

"Will my motor make more power up top now? even with the stock cam still in? "

Yes it will make more power up top but I'd be surprised if makes power past 5500rpm. I wouldn't run 4.30s, ported stock heads and stock cam.

Why not??

 

[ECU5.0]

wouldnt advancing the stock cam move the power band up so you could use the full 6k rpms of the heads and the gears? sounds like it would work....but i dont know that much about cams

 

[NKau]

Here's an idea; PM Thumper I'm sure he's done a bit of expirimenting, and knows what has worked well for those who have purchased his heads. My guess is the stock cam will work great with those heads. Is there something to be gained by going with another cam? Maybe, but probably not enough to justify swapping.

 

[TheREALReiGnMaN]

yo

wouldnt advancing the stock cam move the power band up so you could use the full 6k rpms of the heads and the gears? sounds like it would work....but i dont know that much about cams

If im not mistaken , all advancing the timing will do is cause the motor to fire sooner... wich at WOT , you'd want to retard the timing a bit ... less time to burn the fuel , if he has upgraded injectors and what not... Needs it to burn ... so .... not sure that would work...

 

[NKau]

If im not mistaken , all advancing the timing will do is cause the motor to fire sooner...

Advancing/Retarding the cam changes the actual valve timing.

 

[tmoss]

You have to degree your stock cam to know what yhou have and then to figure out how to install it. My stock cam is advanced 4 degrees and makes power peak at 5,200 and it deosn't drop much till 5,600rpm.