Xnke Posted April 6, 2016 Share Posted April 6, 2016 I haven't had to clearance any bellhousing yet-but then again I'm using a 12lb CrMo steel billet flywheel, and an Exedy 350Z replacement clutch. I have over 1/4" in a 71B bellhousing. Which clutch and flywheel are you using? Quote Link to comment Share on other sites More sharing options...
NewZed Posted April 6, 2016 Share Posted April 6, 2016 Not sure if because it's an earlier 5 speed that the bell housing casting was a little tighter than the later ZX trannies, or if the clutch cover was a little out of tolerance, but it rubbed enough to slow the cranking down. IMG_3670.JPG Did the cover only rub in one spot, not all three? Seems like you're saying that something was off with the cover. A measurement at the rubbing point might help future people, with reference to Xnke's post about different covers. L series flywheels seem to be getting hard to find in general (the 225 mm is essentially NA from normal sources) so swaps like this will be the only way eventually.. Quote Link to comment Share on other sites More sharing options...
83turbo280zx Posted April 18, 2016 Author Share Posted April 18, 2016 I haven't had to clearance any bellhousing yet-but then again I'm using a 12lb CrMo steel billet flywheel, and an Exedy 350Z replacement clutch. I have over 1/4" in a 71B bellhousing. Which clutch and flywheel are you using? I think it has to do with you using a name brand and us using an el cheapo for developmental purposes, I probably should've just bought a FX-Racing (Gripforce) Which is re-boxed exedy parts bought in bulk so they can sell them so cheap. We used the XTD RB26 chrome-moly flywheel and a XTD 350z clutch. I've read in a few different places the XTD clutch plates are thicker than some of the other brands, maybe they use a lesser quality steel, therefore reinforce it by giving it more mass? That's the only explanation I have. Did the cover only rub in one spot, not all three? Seems like you're saying that something was off with the cover. A measurement at the rubbing point might help future people, with reference to Xnke's post about different covers. L series flywheels seem to be getting hard to find in general (the 225 mm is essentially NA from normal sources) so swaps like this will be the only way eventually.. I will measure when we pull the transmission back out to put this spacer in, as well as provide some detailed pictures. Also you can use this RB25 flywheel with a stock 225mm or 240mm clutch if you prefer to not use a 350z clutch, the flywheel surface area is 250mm, so you can obviously step down and still get a lightweight flywheel much cheaper than a L series Fidanza. Quote Link to comment Share on other sites More sharing options...
83turbo280zx Posted April 18, 2016 Author Share Posted April 18, 2016 Ok I finally have the first prototype of the spacer made, it fits fairly snug, you have to lightly tap it onto the back of the crank, it is slightly tapered so it bottoms out against the back of the crank on the chamfered area. I can have these made relatively cheap, so for anyone wanting to do this flywheel swap properly, I can ship this spacer to you anywhere in the continental US for $30. Right now I'm having a limited run made, so If I get more orders than I can fill, there will be a slight delay of 2 weeks. Here are the pics of the spacer. Quote Link to comment Share on other sites More sharing options...
madkaw Posted April 18, 2016 Share Posted April 18, 2016 Great ! Options!! Quote Link to comment Share on other sites More sharing options...
motorsci Posted April 20, 2016 Share Posted April 20, 2016 I have a t -5 with xtd 350z clutch and xtd rb25 fly wheel mine tuns over buy had but have not started it yet Iam planing to fire it up this weekend and will post my results Quote Link to comment Share on other sites More sharing options...
83turbo280zx Posted April 20, 2016 Author Share Posted April 20, 2016 (edited) I have a t -5 with xtd 350z clutch and xtd rb25 fly wheel mine tuns over buy had but have not started it yet Iam planing to fire it up this weekend and will post my results I'm speculating that the t5 bell housing is cast with a little more clearance considering it was built for the 240mm clutch while the FS571WB was built with a 225mm clutch in mind. Did you use anything as far as a spacer on the crankshaft? If not I would highly advise buying one of these spacers. $40 is cheap insurance considering you are gambling with your limbs, bell housing, crank, engine, etc. if you're only using the bolts to keep it centered. Edited July 29, 2017 by 83turbo280zx Quote Link to comment Share on other sites More sharing options...
Namor Posted April 20, 2016 Share Posted April 20, 2016 I'm in for one. Clutch needs to be replaced, but have been waiting and reading to figure out the best option for me and as long as it clears (or can be made to clear) the T-5 bellhousing then this seems to be it. Quote Link to comment Share on other sites More sharing options...
NewZed Posted April 20, 2016 Share Posted April 20, 2016 I'm speculating that the t5 bell housing is cast with a little more clearance considering it was built for the 240mm clutch while the FS571WB was built with a 225mm clutch in mind. You're exhibiting signs of cognitive bias dissonance. The 71B used the 240mm clutch on the 2+2 cars. Quote Link to comment Share on other sites More sharing options...
Namor Posted April 20, 2016 Share Posted April 20, 2016 You're exhibiting signs of cognitive bias dissonance. The 71B used the 240mm clutch on the 2+2 cars. That doesn't mean the 71b wasn't designed with the 225mm clutch in mind. They could have created the 240mm clutch specifically to fit in the 71b bellhousing to prevent from having to change both the transmission and clutch for the 2+2. Just looking at the T-5 vs 71b, the bellhousing looks a lot larger. Quote Link to comment Share on other sites More sharing options...
83turbo280zx Posted April 22, 2016 Author Share Posted April 22, 2016 You're exhibiting signs of cognitive bias dissonance. The 71B used the 240mm clutch on the 2+2 cars. Like i said, just pure speculation, don't have the measurements to prove it. I can however prove that a 240mm clutch does in fact bolt to the RB flywheel, so if you just want a cheaper light flywheel and want to keep the stock or whatever performance turbo clutch you have, you can keep it. this also comes in handy if you don't want to potentially grind into your bell housing, for a true bolt in. Quote Link to comment Share on other sites More sharing options...
NewZed Posted April 22, 2016 Share Posted April 22, 2016 Just joking. You often hear that "the engineers must have done it this way for a reason" but nobody knows for sure. Maybe Nissan designed the pressure plate to fit the transmission. Maybe they just got lucky. Quote Link to comment Share on other sites More sharing options...
83turbo280zx Posted April 23, 2016 Author Share Posted April 23, 2016 Just joking. You often hear that "the engineers must have done it this way for a reason" but nobody knows for sure. Maybe Nissan designed the pressure plate to fit the transmission. Maybe they just got lucky. Or maybe the first castings of the FS571wB bell housing rubbed a 225mm and they went oh shit, moar clearance!!! lol Quote Link to comment Share on other sites More sharing options...
madkaw Posted April 23, 2016 Share Posted April 23, 2016 I have both trans - can I help by measuring something? Quote Link to comment Share on other sites More sharing options...
83turbo280zx Posted April 25, 2016 Author Share Posted April 25, 2016 I have both trans - can I help by measuring something? I still have a T5 bell housing in my garage, so when I drop the transmission on the 240z to install the crank spacer, i'll measure the clearance on the T5 bell housing Quote Link to comment Share on other sites More sharing options...
KidandhisCar Posted May 24, 2016 Share Posted May 24, 2016 Was the t5 bell clearance ever checked?Nearing time for me to order a flywheel and clutch,and I've got a t5. Thanks Quote Link to comment Share on other sites More sharing options...
TONY C Posted June 17, 2016 Share Posted June 17, 2016 (edited) Is this the correct setup? or is there something better? http://www.ebay.com/itm/XTD-STAGE-4-CLUTCH-CHROME-MOLY-FLYWHEEL-KIT-SKYLINE-RB20DET-RB25DET-TURBO-/191876879226?hash=item2cacc0d37a:m:mnu8kMKE9xj4dEBT-mHDbKg&vxp=mtr Also If someone has a t5 bellhousing for sale I need one. Got several trans but no bells. Thanks! Edited June 17, 2016 by TONY C Quote Link to comment Share on other sites More sharing options...
TONY C Posted February 13, 2017 Share Posted February 13, 2017 PM Sent. Ready to do this. Quote Link to comment Share on other sites More sharing options...
83turbo280zx Posted July 29, 2017 Author Share Posted July 29, 2017 BUMP! Just got a new run of spacers in, 3 have been sold, have 7 remaining before submitting the next order. $40 shipped anywhere in the continental US. Will also ship international for additional cost. Quote Link to comment Share on other sites More sharing options...
jthom5147 Posted August 3, 2017 Share Posted August 3, 2017 I bought one that I won't be using (was doing L but switched to RB). Quote Link to comment Share on other sites More sharing options...
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