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Marv D · 09-28-2011, 10:40 AM

I'm wouldn't be surprised if you don't have enough cam to make power at 6000. If you are shifting by sweep of the tach,,,, it's typically 200-400 more for the eye, hand, shift lever, trans to react and actually be in the next gear. I'd 'try' shiftig at 5500 just to see if it like it,, then 6000, then 6500. You only find what the mtor / combination likes by trying.
I won't harp on the tunning thing,, but a $350 trip to a chassis dyno with a box of jets can make a 1/2 a second in a GREAT many vehicles.

Tune the motor, then tune the driving

And I'll be the one to ask,,, was there any before and after flow numbers to the 'fair amount of porting' . Not to say anything bad about anybody..... but I've seen the backyard home port job simply ruin what was a decent flowing set of heads.

09-28-2011, 10:40 AM	#5
Marv D Registered Truck Offender Join Date: May 2008 Location: hells training ground (aka Ariz) Posts: 3,118	Re: Wanna see 13s I'm wouldn't be surprised if you don't have enough cam to make power at 6000. If you are shifting by sweep of the tach,,,, it's typically 200-400 more for the eye, hand, shift lever, trans to react and actually be in the next gear. I'd 'try' shiftig at 5500 just to see if it like it,, then 6000, then 6500. You only find what the mtor / combination likes by trying. I won't harp on the tunning thing,, but a $350 trip to a chassis dyno with a box of jets can make a 1/2 a second in a GREAT many vehicles. Tune the motor, then tune the driving And I'll be the one to ask,,, was there any before and after flow numbers to the 'fair amount of porting' . Not to say anything bad about anybody..... but I've seen the backyard home port job simply ruin what was a decent flowing set of heads. __________________ Still playin with trucks, even at my age! When you're dead, it's only a problem for the people around you, because you don't know you're dead. .....It's kinda the same when your STUPID. I just did my taxes and reviewed my SS statement. Thanks to the current administration it looks like I will only have to work till noon on the day of my funeral.