[X-TECH MAN]

Originally Posted by bill dedman

Terry,

Thanks for all that GREAT information!!!

As you may, or may not know, A-Body sedans have smallish wheel well rear wells, and my Valiant is no exception. I really don't want to have to mini-tub this old crate; I think I can get by without that aggravation by running a 28"-tall, 9-inch-wide tire if I can find one with the right compound. The tires you were running won't fit this thing. I'd like to know what compound you had on those Hoosiers. I'd buy a pair of Hoosiers in a minute if they had a set 28"-tall I could use. That's an 88" rollout.

My setup is rpm-limited; the chassis dyno showed that power falls off really rapidly after 5,600.... I think the engine is outrunning the blower about then, and boost goes from 10 pounds down to about 6 as it approached 6 grand, so I'm gearing it accordingly. That's okay; it'll live longer that way, and this is my daily driver.

Thanks again for all the tire and suspension info. I think before I spend a bunch of $$$ on Cal Tracs, after thinking it over, I'm gonna put some really good tires on it and see how it hooks. If it still spins, then I'll attack the rear suspension with a vengeance...

Bill

Sorry Bill....I forgot the dart/valiant had the small wheel wells for a moment. If the 88 roll out 28X9's will fit go with that. The smaller the diameter (roll out) of the tire the less traction you will have with a given tire width. The best we had used with an automatic was the Hooziers. I will check the compound (I forgot) when I get the chance to look. Maybe tomorrow evening? As far as the PSI on the blower it sounds like your heads need some work or the cam is way to short (wrong overlap, Duration). The blower will calm down the cam. Most street boosts on pump gas are around 5-7 lbs depending on compression like on the B&M 6-71 style blowers when using PUMP gas. . Are you using a "Blower" style cam? There is a difference. Ive only played and built some MARINE blower application engines (Not drag race) several years ago and had comp cams (talk to Chris Pagent) grind me some hydraulic roller cams for lower RPM use for the thunder boats (5200 RPM).They were 502's and made 753 HP on one engine and 752 HP on the other engine on the dyno with marine exhaust maifolds at 5250. 8. 8 compression, 5.3 lbs of boost, no intercoolers, pump gas, ported heads (square ports-Ive preped cylinder heads since 1969). Ran 107 MPH in a 1994 (non stepped botom) 42 ft Fountian boat (10,000 lbs plus-lots of beer on board) on the river. What Im trying to say is you need to have the right heads and cam to use the full benifit of a blower. Hope this helps in some way. Terry