Mustang Lover Posted October 13, 2007 Report Share Posted October 13, 2007 I just got off the phone with David at Brenspeed , they are testing a direct bolt on 4" aluminium driveshaft that will fit our cars . David said most of the ones out their now are not a direct bolt on and theirs will be . The price is going to be a little higher ( in the $729.00 -$739.00) but man to drop 20 lbs of rotational mass will free up a lot of ponies . My tune is schedule to be shipped out Monday , and I recieved my Shelby hood pins yesterday , I will post up the pics as soon as I get them installed , they look really sweet though . Link to comment Share on other sites More sharing options...
RogerS Posted October 14, 2007 Report Share Posted October 14, 2007 Check the different forums on SN197 Drive shafts. You should be looking at a 3 1/2" one piece. Floor pan issues under load on some of the 4" shafts. Not that I know, just what I have read. Link to comment Share on other sites More sharing options...
ilmor Posted October 14, 2007 Report Share Posted October 14, 2007 Also, I think there is also a concern about our exhaust systems having enough clearance from the driveshaft, so 3.5" would have an advantage there also. Hopefully Brenspeed is testing its product against the Ford Racing exhaust system we have also. Link to comment Share on other sites More sharing options...
Mustang Lover Posted October 14, 2007 Author Report Share Posted October 14, 2007 David told me they have tested several and they had one on their Mustang now that they were pretty happy with , I think their main concern was that it be a direct bolt on . Its nice to know they do a lot of testing on the parts that they sell before they offer them to us . Link to comment Share on other sites More sharing options...
Mustang Lover Posted October 14, 2007 Author Report Share Posted October 14, 2007 Check the different forums on SN197 Drive shafts. You should be looking at a 3 1/2" one piece. Floor pan issues under load on some of the 4" shafts. Not that I know, just what I have read. Powerhouse411 also sells a 4" drive shaft http://powerhouse411.com/catalog/index.php...ex&cPath=1_3_19 Link to comment Share on other sites More sharing options...
dave c Posted October 14, 2007 Report Share Posted October 14, 2007 Check the different forums on SN197 Drive shafts. You should be looking at a 3 1/2" one piece. Floor pan issues under load on some of the 4" shafts. Not that I know, just what I have read. +1 I've also been checking into the one piece and read some where, that someone had a 4 inch one piece and had issues with adults in back seat, it would rub when going over small bumps. Not that adults would want to sit in the back seat of a Mustang, if I'm driving the seat is back all the way. When I make the switch, I don't want to spend money on something might make an annoying noise. So I'll wait for a while for you guys to get them in and wait for feed back. Dave Link to comment Share on other sites More sharing options...
Mustang Lover Posted October 14, 2007 Author Report Share Posted October 14, 2007 +1 I've also been checking into the one piece and read some where, that someone had a 4 inch one piece and had issues with adults in back seat, it would rub when going over small bumps. Not that adults would want to sit in the back seat of a Mustang, if I'm driving the seat is back all the way. When I make the switch, I don't want to spend money on something might make an annoying noise. So I'll wait for a while for you guys to get them in and wait for feed back. Dave I guess I'll wait and see what Brenspeed comes up with . Link to comment Share on other sites More sharing options...
RogerS Posted October 18, 2007 Report Share Posted October 18, 2007 +1 I've also been checking into the one piece and read some where, that someone had a 4 inch one piece and had issues with adults in back seat, it would rub when going over small bumps. Not that adults would want to sit in the back seat of a Mustang, if I'm driving the seat is back all the way. When I make the switch, I don't want to spend money on something might make an annoying noise. So I'll wait for a while for you guys to get them in and wait for feed back. Dave Dave, I'll let you know which one I install when I do the mod over the winter. I'm leaning to a Steel 3 1/2". Still a significant weight reduction on rotating mass and durable to 900 RWHP. No clearance issues and no modification of brackets etc. simple bolt in installation. Steel for the torque of the Whipple and a sense of security for reduced chance of faliure under load. Link to comment Share on other sites More sharing options...
stump_breaker Posted October 18, 2007 Report Share Posted October 18, 2007 Dave, I'll let you know which one I install when I do the mod over the winter. I'm leaning to a Steel 3 1/2". Still a significant weight reduction on rotating mass and durable to 900 RWHP. No clearance issues and no modification of brackets etc. simple bolt in installation. Steel for the torque of the Whipple and a sense of security for reduced chance of faliure under load. Has anyone checked on the carbon fiber shafts? Link to comment Share on other sites More sharing options...
Mustang Lover Posted October 18, 2007 Author Report Share Posted October 18, 2007 Has anyone checked on the carbon fiber shafts? I have they are 900.00+ dollars Link to comment Share on other sites More sharing options...
stump_breaker Posted October 18, 2007 Report Share Posted October 18, 2007 I have they are 900.00+ dollars Yeah, I was just looking at one. I retract my question. Link to comment Share on other sites More sharing options...
RogerS Posted October 18, 2007 Report Share Posted October 18, 2007 Yeah, I was just looking at one. I retract my question. Plus they recommend a new pinion flange with this disclaimer NOTE: Rear pinion flange requires professional installation. Improper installation of yoke can result in gear whine and premature gear wear. Looking at a cool $1K + Link to comment Share on other sites More sharing options...
srf73 Posted October 19, 2007 Report Share Posted October 19, 2007 Do a search on the forum for "Coast Driveline" back in the August timeframe. Longish discussion on aluminum driveshafts. I'm not sure what Brenspeed means by "not direct bolt on" but I can assure you that all I did was unbolt and bolt this past weekend. Just finished installing a Coast Driveline 4" aluminum driveshaft. The Coast product is very well made and the difference in weight when you take the old one out and heft it vs the new one is amazing! Cost about $600 with shipping. They make a slightly more expensive one if you have or plan to have extensive (read lots of HP) mods. I'm not. Just Al driveshaft and eventually Al flywheel to let it spin more freely. Keep the engine stock. All I had to do was shift the e-brake cable slightly. They do recommend an adjustable upper control arm to help get the correct pinion angle when you are all done. Todd CSM1638 Link to comment Share on other sites More sharing options...
SWEDESHELBY1 Posted October 19, 2007 Report Share Posted October 19, 2007 Do a search on the forum for "Coast Driveline" back in the August timeframe. Longish discussion on aluminum driveshafts. I'm not sure what Brenspeed means by "not direct bolt on" but I can assure you that all I did was unbolt and bolt this past weekend. Just finished installing a Coast Driveline 4" aluminum driveshaft. The Coast product is very well made and the difference in weight when you take the old one out and heft it vs the new one is amazing! Cost about $600 with shipping. They make a slightly more expensive one if you have or plan to have extensive (read lots of HP) mods. I'm not. Just Al driveshaft and eventually Al flywheel to let it spin more freely. Keep the engine stock. All I had to do was shift the e-brake cable slightly. They do recommend an adjustable upper control arm to help get the correct pinion angle when you are all done. Todd CSM1638 What was your impression of the performance issue here. Was it worth the money? Link to comment Share on other sites More sharing options...
srf73 Posted October 20, 2007 Report Share Posted October 20, 2007 What was your impression of the performance issue here. Was it worth the money? Seat of the Pants...a little snappier, feels freerer(sp?) reving. I did not dyno before/after. I mainly did it to trim some weight and for the reported HP gain at the rear wheels. YMMV Todd Link to comment Share on other sites More sharing options...
Mustang Lover Posted October 20, 2007 Author Report Share Posted October 20, 2007 It does free up HP because of the lighter rotational mass . Lets us know if you have the problems with scaping the floor pan in bumpy or weighted conditions that has been reported with the 4" diameter on lowered cars . I'm interested in getting this myself. Link to comment Share on other sites More sharing options...
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