cyris3d Posted August 22, 2004 Share Posted August 22, 2004 well im starting a build up of a NHRA street class car... having a 240sx with a rb25det in it.. that was the way i was origanly gonna go.. put my GTR motor into a 240sx.... but i just picked up a beautiful 76 280z... gettin the motor in and what not is no big deal.... the problem i am having is figuring what im going to do about the rear end.. being that its a NHRA Steet class.. its gotta use a Nissan Rear.. no cutting, no striaght axel ect... so im thinkn of using a GTR LSD but not sure if the Axels will fit... i know they are plenty strong.... any one know if the GTR rear will fit? and second.. im not sure if a 26x10.5 ET street will fit under the stock fender.... any one run this setup of tire? thanx for the help.. ps allready searched.. couldnt find a clear cut answer Quote Link to comment Share on other sites More sharing options...
74_5.0L_Z Posted August 23, 2004 Share Posted August 23, 2004 For an NHRA street class, the limited slip R200 differential that came in the 87-89 300ZX Turbo should be sufficient. ScottyGNZ of this forum used to run a 240Z with a buick grand national motor in it at the drag strip alot. He started out using the R200 rear end, and it worked fine until he got the car into the low 11's. The R200 is a straight bolt-in and your 280Z may already have one (probably an open version though). If you are not going to drive it much on the street, you can weld the spider gears. Check out RossC and Modern-Motorsports LLC. He has lots of great parts for putting the stronger CV axles into the older cars. Several members here are now experimenting with putting the R230 differential into their cars. I do know that these are stronger, easier to find with factory limited slip, and more difficult to install. About the tires, with small diameter coilover rear springs, and the right offset wheels you can fit 9' tires under the stock wheel wells. But I wouldn't let that bother you. A couple of members here put their car into the low 9's with 9" slicks (a small block with nitrous helped a little too). Look for posts by ScottyGNZ and Japtin. They will probably be the most useful for drag racing questions. Quote Link to comment Share on other sites More sharing options...
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