Is that pillar and harness bar custom setup? or does someone actually make a bolt in for these?
This is a custom item. Off the shelf units are not available.
ademan.... Theres been a few versions around for the 1st gen. If you remember Adamturbo I believe he had the first some 7-8yrs ago .
gtdreamdxbudget..... very nice, looks like a very nicely designed item, burly, better than 99% of the home brewed items Ive seen on the boards....... except for one major thing. The mounting points.
The end mounts really should be flush to the b-pillars and not offset like they are.
The mounting points on the b-pillar and the harness' needs as to how they are mounted correctly have a fairly long lever arm. Nothing can be done about that since its a design constraint. However that long lever arm and the offset mounting will either twist or shear those bolts if you get a hard enough hit. Granted, no one plans to be hit/crash and you are "only" autocrossing, but since the primary restraint mode has been replaced with the harness bar, you should see about reducing that possibility, you know...just in case.
I had Adams B-pillar bar for a bit and while it was too tall to be used effectively as a harness bar, the end mounts were mounted flush to the b-pillar. It was a lot of mental gymnastics to figure a way to get it and the autobelts to work, but It could be done.
its a really nice design despite the mounts though. Looks like a good place to fit a boss for a camera mount as well.
did it on 4 cars, 3 years ago on 2 pgt and 2 years ago and 2 mx6.
mine was originally on my DTM 89pgt. (it was in for the Hocking hills 03 trip even)
mine has been installed on 3 different car's, still the same old bar though. its on its 2nd coat of paint though.
im pretty sure i bought mine from adam actually. or possibly mike (mblaster)? i dunno, it's been along time. lol. it's in my DD beater, the 89lx. why? cause its the only 88-89 1st gen i own anymore. lol
This is a custom item. Off the shelf units are not available.
ademan.... Theres been a few versions around for the 1st gen. If you remember Adamturbo I believe he had the first some 7-8yrs ago .
gtdreamdxbudget..... very nice, looks like a very nicely designed item, burly, better than 99% of the home brewed items Ive seen on the boards....... except for one major thing. The mounting points.
The end mounts really should be flush to the b-pillars and not offset like they are.
The mounting points on the b-pillar and the harness' needs as to how they are mounted correctly have a fairly long lever arm. Nothing can be done about that since its a design constraint. However that long lever arm and the offset mounting will either twist or shear those bolts if you get a hard enough hit. Granted, no one plans to be hit/crash and you are "only" autocrossing, but since the primary restraint mode has been replaced with the harness bar, you should see about reducing that possibility, you know...just in case.
I had Adams B-pillar bar for a bit and while it was too tall to be used effectively as a harness bar, the end mounts were mounted flush to the b-pillar. It was a lot of mental gymnastics to figure a way to get it and the autobelts to work, but It could be done.
its a really nice design despite the mounts though. Looks like a good place to fit a boss for a camera mount as well.
Gavin
Adding a second bar at bolt level would solve this.
Adding a second bar at bolt level would solve this.
Not sure I see what you mean. How would that stop the torque (force generated from the weight of the body on the harness) from the existing bar to the bolts?
Not sure I see what you mean. How would that stop the torque (force generated from the weight of the body on the harness) from the existing bar to the bolts?
Gavin
From what I gather he is saying is weld in another bar where he has placed the bolts. But I would have say that would not fix it. If you leave the straps mounted to the bottom bar, you still have torque being applied if the straps are loaded up. Then if you move the mounting of the straps up to an added bar where the bolts are, it changes the harness retention geometry. And potentially making less effective in retraining the body.
That would be "better", but youve introduced two additional surfaces where things could shift about. Granted you are looking at a compromise setup given the constraints, but I still believe that for this design having the ends mount flush to the b-pillar would be more ideal.
i know it's got a huge lever arm, but thats why i used grade 10 studs in the stock mounting points in the b pillar, each side has two studs to keep it in place since there were 2 mounting points already in place, so even with the large lever arm, it should have enough strength to hold me regardless. as for the weight, i made it out of 2 inch angle aluminum and 1.5 inch square stock aluminum, with 1/4 inch walls. so it's really not all that heavy, but quite stiff.
That would be "better", but youve introduced two additional surfaces where things could shift about. Granted you are looking at a compromise setup given the constraints, but I still believe that for this design having the ends mount flush to the b-pillar would be more ideal.
the less leverage is always better, though i think with the materials and the design, im more likely to bend up my b pillars than the bar or brackets themselves. I was trying to use the stock mounting points since im less secure in my ability to modify the pillar to place it where i'd rather, and having just a bar strait across would place the harness mounts at about ear level for my height. i do see your point about the shear strength in the bolts however, and it's something ill be looking into this weekend just for safety sake
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