NoPistons -Mazda Rx7 & Rx8 Rotary Forum

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-   -   4.30 Rear End? (https://www.nopistons.com/2nd-generation-specific-17/4-30-rear-end-17007/)

vosko 05-10-2003 01:30 PM

you have no idea how much i abused that GTU. it is still going strong! a friend saw it at the drag strip in PA https://www.nopistons.com/forums/pub...#>/biggrin.png



my old TII is gonna be running again too. i have owned too many rx7's https://www.nopistons.com/forums/pub...1047683785.gif

pengaru 05-10-2003 02:52 PM


Originally Posted by SeventyMach1' date='May 10 2003, 06:18 AM
That happens to be the same truck I have. Well, not a Splash, but the same thing. (all 2WD's had 7.5 rears) I can nail the throttle on my truck and the passenger wheel will sit there and spin. I don't even have to power brake it. (needless to say, it is modded out the watusi) No matter how the weight is distrubuted, the driver's side WILL NOT SPIN. It sounds to me like your coworker INDEED HAS a 7.5 LSD. Ask him and see. If he doesn't, that 2nd wheel isn't lightin' up. This is my 3rd Ranger and my brother has 1 as well. 1 of mine was LSD, the other 2 were not. The LSD (8.8 4X4 BTW) was the only 1 that would spin both. It's not IRS. The tires are the same. There are no other factors. It just won't spin.



Back when I considered a V-8 swap in this car, I visited Grannys Speed Shop, who are notoriously involved with the RX-7 swap. They told me all 2nd Gens. were LSD. Aight, if my SE isn't LSD then why do both spin together so easily? If it don't have to be LSD to spin, then what would be the difference in an open differential and an LSD?

he doesnt have LSD, I know the truck pretty well... we were friends before we were coworkers.



do you need me to get pictures and/or movies ?



my other coworker has a turbo volvo wagon with a solid axle, he's volunteering to do a burnout with both one wheel and both wheels for your viewing pleasure.



he also has a grand prix gtp which does brunouts with both wheels, I can go to the parking lot and get some pictures. if you think there are no other factors, you should get a clue.

mockujin 05-10-2003 03:01 PM

Well the guy at my shop looked at my diff and said either the clutch in the diff is loose or its a torsen, either of thoes two factors can make only one wheel spin when you turn it.

j9fd3s 05-10-2003 03:07 PM


Originally Posted by mockujin' date='May 10 2003, 12:01 PM
Well the guy at my shop looked at my diff and said either the clutch in the diff is loose or its a torsen, either of thoes two factors can make only one wheel spin when you turn it.

thats true, the best way to spot an lsd is to take it apart, but they only put lsd's in the gtus and turbo in 89 so unless they built it wrong (very very rare) or its been swapped at some point its open



mike

pengaru 05-10-2003 03:13 PM

actually, I just remembered I already have pictures of the volvo from the splash doing a crazy burnout at a busy intersection:

http://pengaru.com/~swivel/volvoburnout/



thats both wheels, yes sir. https://www.nopistons.com/forums/pub...#>/BURNOUT.gif

SeventyMach1 05-10-2003 10:05 PM

I wasn't lookin' for an arguement here. I guess I was just applying what I seen my truck do to the car as well. Mikes explanation helps. I didn't know all that "connected to the diff." stuff. Still though, with his explanation, I don't see how your old friend's truck spins both (without LSD). He said a solid differential will spin only 1 tire if it's not an LSD.



I'm not sayin' he can't get both to spin. I'm just sayin' that if he can, he has an LSD unit. (or a barnyard locker....very dangerous)

pengaru 05-10-2003 10:18 PM

impossible to do a two wheel burnout without LSD?



what ever happened to where theres a wheel theres a way?

mockujin 05-11-2003 12:01 AM

https://www.nopistons.com/forums/pub...1047683785.gif

SeventyMach1 05-13-2003 02:17 AM


Originally Posted by pengaru' date='May 10 2003, 07:18 PM
impossible to do a two wheel burnout without LSD?



Uhh, I never said that. However, it is my understanding (through Mike's post) that this IS true for a solid axle setup. The RX-7 rear is different than a solid axle setup. In laymans terms, here again:



A Solid Axle (non-LSD) =1 Wheel Only

A Solid Axle (LSD) =Possible 2 Wheel

RX-7 (non-LSD) =Possible 2 Wheel

RX-7 (LSD) =Possible 2 Wheel





what ever happened to where theres a wheel theres a way?



The more wheels, the more ways!

https://www.nopistons.com/forums/pub...1047683785.gif

Jerk_Racer 05-13-2003 08:20 PM

Don't a lot of burnouts use LSD? https://www.nopistons.com/forums/pub..._DIR#>/dry.png


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