Driveshaft loop with gear vendors??

[RECHRGD]

Our local dragstrip says they are now going to NHRA rules and I need a drivehaft loop if the car is 13.00 or quicker with an automatic transmission.  Is there anything sold that will work with this setup (see pics) that will pass tech.  In the '60's you could just weld a piece of chain to hang below the driveshaft, but I'm sure that won't cut it anymore.  Thanks,  Bob

[FLG]

Here ya go 

http://www.dodgecharger.com/forum/index.php/topic,41726.msg459572.html#msg459572

[RECHRGD]

Here ya go 

http://www.dodgecharger.com/forum/index.php/topic,41726.msg459572.html#msg459572

Thanks FLG!  I wish I had those subframe connectors!  So it looks like you can fabricate something and have it pass tech as long as it's not micky moused?

[firefighter3931]

Bob, there are several universal driveshaft loops available on the market but those require drilling holes in your floorpans to mount them. They usually sell for ~ $25 or so. The one on Hemi Dougs car is a modified Lakewood universal loop.


Ron

[mopar_nut_440_6]

USCarTool makes this one. It is bolt in which is nice but it is a bit pricy. If you have access to some tools you could easily make your own using a universal driveshaft loop.

http://www.uscartool.com/

[firefighter3931]

USCarTool makes this one. It is bolt in which is nice but it is a bit pricy. If you have access to some tools you could easily make your own using a universal driveshaft loop.

http://www.uscartool.com/

Unfortunately, the bolt-in loop from US Cartool will not work with a GV overdrive unit or a Keisler 5 speed for that matter. 



Ron

[RECHRGD]

Bob, there are several universal driveshaft loops available on the market but those require drilling holes in your floorpans to mount them. They usually sell for ~ $25 or so. The one on Hemi Dougs car is a modified Lakewood universal loop.


Ron

Thanks Ron.  I'll start looking around.  My exhaust pipes are pretty close to the driveshaft.  Hopefully I can find one that will fit.  Bob

[firefighter3931]

Bob, here is one that is application specific....not universal. A little on the pricy side but it should fit better than a universal part and from the looks of it....it will clear your exhaust pipes. 

http://www.metcomotorsports.com/proddetail.asp?prod=MDL1700

I'm pretty sure one of the members here has this loop or something very similar on his car with either a GV overdrive or a Keisler 5spd. I can't remember who but i'm sure that i've seen it in the last couple of years. 




Ron

[mauve66]

the one from uscartool is the same one that mancini sells, i was thinking of using it but just using a longer piece of metal for the middle part so that it would reach the drive shaft, i would rather it bolt to the tranny crossmember than have to pull the carpet back up and drill new holes in the car

[RECHRGD]

Bob, here is one that is application specific....not universal. A little on the pricy side but it should fit better than a universal part and from the looks of it....it will clear your exhaust pipes. 

http://www.metcomotorsports.com/proddetail.asp?prod=MDL1700

Thanks Ron!  I'll have to make some measurements and check it out.  It may need to be blocked down or something as the driveshaft location is somewhat further back with the g/v.

the one from uscartool is the same one that mancini sells, i was thinking of using it but just using a longer piece of metal for the middle part so that it would reach the drive shaft, i would rather it bolt to the tranny crossmember than have to pull the carpet back up and drill new holes in the car

M66, how would you get it past the g/v unit?

[Mick70RR]

Those seat belt mounts look to be in right position fo the prop loop and would save drilling the floor.

[mauve66]

from what i can see in the pic the front part bolts to the tranny crossmember and then it has a flat metal strap looking piece to extend it down past the normal tailshaft to the driveshaft, i'm hoping that flat piece would run right under the GV oil pan then bolt up to the other end for the loop around the driveshaft

[mauve66]

Those seat belt mounts look to be in right position fo the prop loop and would save drilling the floor.

i just ran out and looked at it, they are in about the right place on my 1st gen, don't know about others, i'll have to look into it before ordering a loop and maybe do a mockup, would be better than running all that metal from the tranny cross member,  good idea thanks

[RECHRGD]

Those seat belt mounts look to be in right position fo the prop loop and would save drilling the floor.

i just ran out and looked at it, they are in about the right place on my 1st gen, don't know about others, i'll have to look into it before ordering a loop and maybe do a mockup, would be better than running all that metal from the tranny cross member,  good idea thanks

I'd also be concerned about extending the loop support from the crossmember.  With lack of support it could have enough flex in it to create a real problem.     Bob

[mopar_nut_440_6]

Another alternative may be to use the universal driveshaft loop and weld (tack)  some  bolts to the underside of the floor pan to mount it. If you ever wanted to take it off you would only need to cut the welds at the bolt and grind back to the factory floor.

[RECHRGD]

Another alternative may be to use the universal driveshaft loop and weld (tack)  some  bolts to the underside of the floor pan to mount it. If you ever wanted to take it off you would only need to cut the welds at the bolt and grind back to the factory floor.

Good idea!

[Runner]

i would not tack botlts to the bottom of the floor to mount them.   some of the saffty rulles i think or a little stupid, a safty loop is not one of them. if you have ever seen a failure at speed you would agree. besides if you ever dont want the loop in the car how hard is it to weld up 4 3/8 holes and grind the weld down?


  this is what i have bob it cost me less than 10 bucks, fits great, works good.  just go to a mettal shop and get you a 2 inch piece of 6x1/4 inch inch round pipe, then get 4 feet of 2 inch x 1/4 flat bar, weld it up, drill the holes in the floor board, use a thick body washer on the inside of the car and be done with it.

http://www.moparts.org/Tech/Archive/shaft/6.html

[RECHRGD]

i would not tack botlts to the bottom of the floor to mount them.   some of the saffty rulles i think or a little stupid, a safty loop is not one of them. if you have ever seen a failure at speed you would agree. besides if you ever dont want the loop in the car how hard is it to weld up 4 3/8 holes and grind the weld down?


  this is what i have bob it cost me less than 10 bucks, fits great, works good.  just go to a mettal shop and get you a 2 inch piece of 6x1/4 inch inch round pipe, then get 4 feet of 2 inch x 1/4 flat bar, weld it up, drill the holes in the floor board, use a thick body washer on the inside of the car and be done with it.

http://www.moparts.org/Tech/Archive/shaft/6.html

Thanks Mike!  Good pictures and info.  I printed it out.  Hope to see you this year.  I say that every year though.  Bob

[Runner]

hey bob, i wanted to post this picture for you but couldnt find it, i just found it so here it is... 

[mopar_nut_440_6]

i would not tack botlts to the bottom of the floor to mount them.   some of the saffty rulles i think or a little stupid, a safty loop is not one of them. if you have ever seen a failure at speed you would agree. besides if you ever dont want the loop in the car how hard is it to weld up 4 3/8 holes and grind the weld down?


  this is what i have bob it cost me less than 10 bucks, fits great, works good.  just go to a mettal shop and get you a 2 inch piece of 6x1/4 inch inch round pipe, then get 4 feet of 2 inch x 1/4 flat bar, weld it up, drill the holes in the floor board, use a thick body washer on the inside of the car and be done with it.

http://www.moparts.org/Tech/Archive/shaft/6.html

Nice job, that looks great!