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Old 04-11-2014, 02:25 AM   #72
Super73
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Join Date: Nov 2007
Location: Bay Area, Ca
Posts: 2,841
Re: Another 489bbc question

Quote:
Originally Posted by 68c10owner View Post
Tunnel rams are not less streetable. They are more difficult to tune than a single 4bbl but plenty streetable and usually make more power than a single 4bbl but dont think you`ll want it for a lower rom torque motor. I must have missed this, were you considering a tunnel ram? Stall speed is going to be determined by what camshaft you use. You are going to want to stay in the 2500-2800rpm range for a stall. Dont think you`ll need a 3000 stall. A good quality stall converter will drive like a normal converter from a stop. The foot brake is how much you can give it throttle while holding the brake. Its only going to go so much before you break the tires loose. Rear gear will effect the foot brake. The flash stall speed is what happens when you nail the gas and the rpms jump up to what the flash is. The more torque, the more stall your going to have. If you have a 2500 stall behind a stock 350 and then put a 600hp 496 in front of it you will get more stall.

The are more thing than cam that dictate stall speed than just a cam. Intake runner length, rod ratio, header tube length and diameter and more plays a role in to peak tq rpm. Valve events definately have a heavy hand in it but at the end of the day peak tq rpm really dictates where optimal stall speed is.
__________________
------Motor---------------Bottle
60'---1.53---------------1.41
1/8---6.58 @ 105.92----5.87 @ 118.41
1/4---10.38 @ 126.97----9.24 @ 142.49
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