I'm looking into a pair of sub frame connectors, but am trying to decide between the BMR tubular or square design.

They say the square ones are stronger.

Anyone have an opinion either way?

I assume the install is similar for either type.

Thanks,
Dan

 

It probably won't matter which one you go with. If you plan on having a 9sec 1/4mile car in the future, go with the boxed ones. If not, tubulars should be fine.

 

From what I've read, the square are stronger torsionally than the tubulars, but they rob about 3/4" of ground clearance. The tubulars don't affect ground clearance, but aren't quite as strong. So how important is ground clearance to you? That's the question.

 

I think it doesn't make any difference in practical terms. Which is stronger in torsion and which is stronger in bending is a function of the specific dimensions and wall thickness.... it's entirely possible to achieve the same results with both shapes. Only the weight will be different.

I know for a fact that George Baxter's 9.04-second/155mph pass, in a 3,900# 30th SS convertible was made with the same set of cheapo MAC tubulars that he put on the car when he first bought the car new.

 

Thanks all. Looks like tubulars for me

I like the looks better anyways, not that it really matters, but it's a plus.

Dan

 

I read that tubulars are better than square, because the square brackets have 90 degree angles that allow for heat risers. Tubular being complety round, doesn't allow for that. Just my .02

 

I have the BMR tubulars, but they are sitting in my garage still. I'll let you know how i like them if i can ever find a place that can install them for me. The only place that i found wanted to charge me $250. That just seems to high to me.

 

Yeah, that's crazy high for an install price.

It should be less than $100. Just remember that the car has to be loaded during the install, so it needs to be on a lift that supports the car by the wheels, not the frame.

Dan

 

Could you possibly mean "stress risers"? If so, you are going overboard.... this isn't high tech... its basic. No need to overcomplicate it.

 

Yes, I meant stress risers, thank you.

 

I got square double diamond SFCs from www.sybersport.com

Really stiffened up the car!!

I think they were $185 u.s. shipped.

If you're serious about buying, email Darren at info@sybersport.com and tell him Grip sent you.