The Official VR6 Engine Swap (Page 13/73) bmwguru FEB 14, 06:49 AM The flanges are bolted in by one bolt in the center. The passenger side flange comes off to remove the transmission from the engine. They will not be there on the custom axles. I was told by the driveshaft shop that the heavy duty axles that can handle serious hp need to have inboard joints similiar to the Fiero. The options for the axles are for up to 500hp I can run VW inners and GM outer CV joints on a custom axle using the stock 100mm flange. If I am planning on making more power I need to remove the flanges and have GM style inner joints and outer joints with a custom wheel hub that can handle a bigger axle. The price I got was $700 for the standard custom axles or $1600 for the heavy duty set.........so, if anyone needs Jetta parts there is still plenty of car left...lol. Dave dsnover FEB 14, 08:18 AM quote Originally posted by bmwguru: If I am planning on making more power I need to remove the flanges and have GM style inner joints and outer joints with a custom wheel hub that can handle a bigger axle. The price I got was $700 for the standard custom axles or $1600 for the heavy duty set.........so, if anyone needs Jetta parts there is still plenty of car left...lol. Dave This seems odd to me. Porsche has been using the flange mountings forever, and I don't recall hearing much about problems, even with the über tweaked turbo's. Of course, the flanges on a Porsche could be a lot more beefy than a VW, but still, I'd think the failure point would be something other than the flange. Perhaps the flanges and axles from a 911 or 951 (or pick a Porsche) could be made to work? bmwguru FEB 14, 08:28 AM quote Originally posted by dsnover: This seems odd to me. Porsche has been using the flange mountings forever, and I don't recall hearing much about problems, even with the über tweaked turbo's. Of course, the flanges on a Porsche could be a lot more beefy than a VW, but still, I'd think the failure point would be something other than the flange. Perhaps the flanges and axles from a 911 or 951 (or pick a Porsche) could be made to work? I'm just relaying what the driveshaft shop told me. VW uses 100mm flanges...Porsche might be bigger. Maybe it is the inner joint...it is pretty small. I knew the axles were going to be an issue before I started this swap, but I just planned on getting custom ones made to make it easier. Dave dsnover FEB 14, 08:50 AM quote Originally posted by bmwguru: I'm just relaying what the driveshaft shop told me. VW uses 100mm flanges...Porsche might be bigger. Maybe it is the inner joint...it is pretty small. I knew the axles were going to be an issue before I started this swap, but I just planned on getting custom ones made to make it easier. Dave No problem. I'm particularly interested in this swap, not so much for the VR6, but for the transmission/axles, so that a TDI swap becomes do-able. I've got a 2000 Jetta TDI, now with about 225k miles. The car isn't fast, but it isn't a slouch either. A set of PP520's, a different turbo, etc, and in a Fiero, and the care would probably get 55+ MPG, and still be faster than a stock 2.8 Fiero. megafreakindeth FEB 14, 12:08 PM for anyone wondering what the diff is between the new r32 and the old one(or any previous vr6) its quite a bit, aside from the change from 15deg crank angle to 10deg the new one uses direct injection(injectors in combustion chamber) and tons of other stuff that would make swapping it into a standard gas car hard. as for the flanges, they dont really fail but the inner cv joints fail under power/drag racing, also the syncros get damaged and dont exactly break but can make for challenging gear engagement. the lsd should take care of that because itll distribute the load over both axles, hopefully. bmwguru FEB 14, 12:35 PM I'll be regearing the transmission as needed after I do the turbo. There are tons of race gearsets/ streetgears/ final drive ratios/ etc for the 02J transmission. Dave KurtAKX FEB 14, 03:43 PM quote Originally posted by bmwguru: I'm just relaying what the driveshaft shop told me. VW uses 100mm flanges...Porsche might be bigger. Maybe it is the inner joint...it is pretty small. I knew the axles were going to be an issue before I started this swap, but I just planned on getting custom ones made to make it easier. Dave Have you looked at Toronado/Riv longitudinal axles or S10 front inners? These are flange mount style yet have a tripot plunge style joint like the Fiero, and I believe they are the correct spline to slide the outer and fiero shaft right into them. It might be relatively simple to get adapter plates made to go from a 100mm flange to whatever the flange of the S10 is. bmwguru FEB 14, 05:53 PM I had a few hours today to make the front transmission mount. I made a few jigs to recreate the mounts for a later install if I choose to do another one. The hardest part was to ensure the engine sat just right in the bay. Too far to the passenger side and the intake would hit. Too far to the driver's side and the transmission would hit. It fits just right with little mods except for the custom mounts and axles thus far. Towards the end of the swap, I'll list the performance add ons I did to the engine and transmission (and Fiero in general). A lot of money could have been saved, but I knew what I wanted before even pulling out the engine. Obviously, this swap could have been done without the torsen type limited slip differential, Fidanza flywheel, clutch kit, port and polish...etc. After getting this far, I could probably do this swap again without having to buy an entire car...although, I've already made back my investment and there is plenty of car left. So far, the only parts I used from the donor were: engine with accessories (but all were replaced with new), transmission (redone with LSD), wiring harnesses (one is inexpensive new from VW, but the other is worth buying the car for...it is over $1000), gas pedal with wiring. I think that is everything....my mind is exhausted. Dave bmwguru FEB 14, 05:56 PM quote Originally posted by KurtAKX: Have you looked at Toronado/Riv longitudinal axles or S10 front inners? These are flange mount style yet have a tripot plunge style joint like the Fiero, and I believe they are the correct spline to slide the outer and fiero shaft right into them. It might be relatively simple to get adapter plates made to go from a 100mm flange to whatever the flange of the S10 is. as for the axles, the lengths are not anywhere close to stock. I set the engine in to suit my needs not for the axles. I'm also going to be building a second VR6 that will be built to handle around 30lbs of boost. I want the engine to break before my axles...and I don't want the engine to break. Dave anonymity FEB 15, 09:50 PM (continued from the "fed up...." thread) Is it done yet?