Posted by Chris Case [75.36.45.253] on Friday, November 23, 2012 at 18:42:06 :
In Reply to: Re: with bigger carb and stock manifold? posted by Kaegi [24.16.253.154] on Friday, November 23, 2012 at 16:56:02 :
Bigger carb = +5, headers = +5, both = + 10.
Those are the improvements at maximum hp. But the gains are about double at 3200, where the OE system is already falling off. That is a huge imrovemnt for freeway speeds, especially hilly at 55 mph. That 20% means not having to drop to 3rd and 35 mph.
You don't have any dyno records of the cam improvements do you? Longevity probs?
Next truck will have the 420 semi-synchro. It ought to help driveability by being able to drop to 3rd before the truck looses all forward momentum. If I like that, I may figure out how to get the 435 in. Or???
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