It left straight with slicks, now it doesn't with street tires.  Wouldn't that suggest a tire problem?  What if you tried switching the rear tires side for side.  If it goes crooked the other way, that would tell you if it was a tire issue.

John - "The Hoosier Hurricane"

That’s a definite possibility that I’m considering. 

I haven’t tried switching or rotating the tires yet. It’s on my list of things to try. The added horsepower and torque is also a definite possibility. Had a conversation about the problem at a local car cruise with a Ford guy tonight and he bought up the fact that CLTrac’s worked very well with keeping high horsepower cars going straight. The fact that they ar adjustable makes sense. I’ve been thinking about trying them. I don’t find a part number for my 57 T Bird on their website. Does anyone have a part number?

It actually went straight with street tires until I upped the horsepower and torque with headers and exhaust system. 

Any comments on how well CalTrac’s work?

Old post on Caltrac. Note Vic’s comments towards the end. If it’s leaving straight with a wheel pulled………

http://forums.y-blocksforever.com/Topic118990.aspx

miker
55 bird, 32 cabrio F code
Kent, WA
Tucson, AZ

CalTracs are the best option for a street / strip car.  They provide the traction capability and for me, I could not tell any difference in the everyday ride quality.  They may or may not address your problem, depending on what that problem ends up being.



Lawrenceville, GA