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Engine Porn (beyond ... saturation)


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I'm guessing that if the strut towers moved the hood would get pinched or you'd see the gap get wider while cornering. Strut braces.... so subtle you would never know if it was working or not!

 

Meanwhile back in the real world where placebos work as well as medicine....

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Mike. Have you ever had a non stock Datsun that you used for auto X or open track day's ??? I can tell ya they do work. I had one on the front and rear of my auto x car.

And a full roll cage makes a difference as well. Your just not going to know it on a street car.

 

When my whip is whippin I can tell the difference.

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You would be supprised how much the shock towers move on some cars. It made a big difference on the Eclipse I used to have. If you pulled the bolt out of one side, and jacked it up to work on it it would missalign by at least one half inch. That can change your alignment by a lot when going over bumps.

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To be honest. I bought a strut brace for my SR 510 thinking hell, with that much power I'd better get all the support I can. I asked around, did some research, and this is what I found. BRE #47 by the end of the season NO BRACE, Bob Sharp same NO BRACE, Troy Ermish who holds the lap record at Laguna, Sears Point, and Willow Springs, yah, NO BRACE.

 

BRE #47

BRE46_-_engine.jpg

 

One of Troys cars

1974_Datsun_710_Bob_Bondurant_Racing_Sch

 

If you think of it, all the lateral cornering load is transferred through the bottom of the strut into the control arm which is held by the front cross member. The strut towers see only vertical force transferred up through the suspension. If the car has a roll cage there is no point, because the body will not flex if the cage is built right.

 

When it comes to torsional force exerted by the motor, there again, those loads are transferred to the cross member which is mounted to the stoutest part of the unibody. Just forward of the shear support of the firewall, and directly under the V shape support of the strut towers, the cross member is held solid.

 

For the sake of argument, lets say there was some flex in the strut towers in cornering, or torsional rotation of the motor. If the top of the brace is held only by a pivoting point at the top of the tower, it offers no torsional strength if the body is twisting.

 

I have a body bonded 6 point cage that is welded to the rear towers, and a strut brace in the back. The back sees much greater torsional loading under acceleration out of corners than the front.

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yea good point para cars that got roll cages don't need no stinkin' strut bars

mike has a cage in his 710 goon i believe?

 

Well it's a 4 door and a goon so loads more structural strength than a 2 door sedan would have.

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On the 510 the strut towers are far enough away from the fire wall. So take advantage of a brace. My 1200 flexes like a wet waffle. I'm going to add one.

 

Most modern cars are designed to where the towers are so close to the firewall that even on a track car you don't see them run over the motor.

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