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Author Topic:   heads???????
ss#2
Dirt Forum Racer

Total posts: 80
posted July 22, 2004 11:05 PM  
can heads cusae you not to gain rpm i can only turn 6600 no matter what i do..this is on my factory stock

way2fast72
Dirt Freak

Total posts: 303
posted July 23, 2004 01:46 AM  
have you checked for weak valve springs?

Raz_900
Dirt Forum Champ
Total posts: 635
posted July 23, 2004 08:59 AM  
Stock 2bbl carb, stock intake & exhaust manifolds will limit rpm. If you're using all factory stock stuff, I'm surprised it gets that high. It would probably be faster sping 6000-6200 and cam'd a little smaller.

I can run a Holley 3310 750cfm, Edelbrock Performer and 1 5/8" headers. Spinning around 6200-6300 seems to be the sweet spot. Above that doesn't seem to make it go any faster. Someday I'll dyno it in the car and see for sure.

Just my $.02 though.


ss#2
Dirt Forum Racer

Total posts: 80
posted July 23, 2004 09:26 AM  
750 db,cast iron intake ,headers ,roller rockers stud gurldes

racer17j
Dirt Forum Champ
Total posts: 5390
posted July 23, 2004 04:59 PM  
i'd say valve springs as well mine did the same thing i went from a 5.67 to a 5.74 gear and still 6000 i'm gonna change springs tonite and see if that cures it tomarrow

    

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