2nd Generation Specific 1986-1992 Discussion

how much HP can N/A diff take? 90 GXL

Old 12-29-2006, 10:41 PM
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My 90 GXL has a stock LSD (please dont argue about it, I already checked and confirmed) I read about 2 years ago that the stock diff from NA cant hold more than 250 whp and it could take more than 500 whp from a non-rotary motor, I need some one to confirm this or correct accordingly. I been searching about 5 different forums trying to find it, but no luck so far, thanks for understanding
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Old 12-30-2006, 12:32 AM
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no freakin way a stock n/a lsd is holding 500 hp it doesn't matter whether its a rotary engine or not



you need to upgrade to the TURBO lsd for that much hp



i doubt an n/a lsd would even last to 250 hp you could probably rip it off the mounts (easily) the first launch with a Stockish TII engine.- (less than 250 hp)



i believe these n/a lsd are very similar to those found in Miatas and s2000 honda



anyhow they are junk

just upgrade.
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Old 12-30-2006, 07:31 AM
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The trans will snap way before the diff. The S5 N/A drive line will take 250+ if you ease it off the line through 1st gear.



It all depends on how brutal you are to it, how big and sticky your tires are, and how grabby your clutch is.
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Old 12-30-2006, 01:59 PM
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I dont want to argue with people or start arguments. the original post that im looking for had a picture of the guy's rear end blown out, and a full write up about it. I thought it would of been a sticky in a forum since it very imformative. So, not to be rude, if you dont know or cant back it up, please dont post. And im talking about the diff, not the trans, motor, bushings, tires, axles, turbos, etc. thanks for understanding.
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Old 12-30-2006, 02:23 PM
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Instead of being happy that you got answers to a question that has been asked and answered 1.5 billion times. You have this snotty, dismissive attitude toward people who probably have more experience than you in the matter.



If your looking for an "original post" use the search function for that, and any other dumb questions you may have.



Sorry, not trying to be rude or argue.
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Old 12-30-2006, 03:07 PM
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interesting, Im not asking a question that was asked to death. As i stated before, I been searching 5 different forums that i think i found it in. I dont think anyone has spent as much time as i have looking for the post by first using the SEARCH button, then going to every single suggestion it pops up, then when i dont find it, i go through every post in the section i believe it would be at. incase you are wondering i am still searching. I know some posts get deleted from time to time since I found that post about 2 years ago and that doesnt entale the age of the post. I know you are trying to help, but the fact is I never asked for "hey, how much can a TRANS from an NA hold up to?"

What responds did I get, lets see... first one, that is not possible(yeah...why?) You need to Upgrade to Turbo, better said just upgrade. I do see why you would want to upgrade if you are going to stay rotary. Second, your TRANS is going to break first... yeah... nothing to do with my diff question does it?

"you are snotty", not really. I asked about a DIFF, not the rest of the car. If this was asked to death 1.5 billion times, I would of found it right off the bat. If you do a search on this, you will know that there isnt anything about it. Thus making my question unique. Now here is the kicker of it all ( this is funny), as I was typing and thinking how annoyed I am, I remembered it was posted talking about the V8 swaps and its components. I know i'm not as experienced with FCs, but dont take me for an idiot that doesnt search before asking questions.

LOL, found it... its a 2 part. One is on the V8 swaped and the other is about the turboed N/A rotary. Found the V8 part, just need find the picture of the 2nd part.
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Old 12-30-2006, 03:23 PM
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im putting a turbo on my NA and plan on asploding some drivetrin parts if my clutch holds.



ill send you some pictures when it happens.
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Old 12-30-2006, 03:29 PM
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This can be found in General Info from Granny's "...The stock RX-7 rear axles are amazingly durable (internally, the parts are similar in size and even stronger than the Chevy 10 bolt that comes in the newer Z-28). While we offer bolt-in narrowed rear housings and axles for the 1st gen. cars, unless you are REALLY going to abuse it, we suggest you try the stock rear first. There are many V-8 powered 2nd gen RX-7s on slicks running mid-10 sec 1/4 mi times on the stock rear, a feat that requires 475-500hp. The clutch type limited slip up thru '88 is very strong 4 pinion style much like the diff design used in the Dana 60. Although it may be hard to believe, the rotary powered RX-7 drag racers are probably harder on the rear than the V-8 powered guys. The reasoning behind this is that most all rotary powered RX-7 drag racers use a manual transmission, a metallic clutch, and a heavy flywheel spinning at 9-10K rpm to assist the low torque rotary in launching the car. An incredible amount of stored energy is released into the rotary drivetrain to launch the car, enough to launch the car well even if the rotary engine died on the line. In the case of the V-8, plenty of torque is on tap to allow low rpm starts, also making it much easier to modulate the power to make the most of available traction."
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Old 12-30-2006, 03:47 PM
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Originally Posted by lata' post='850880' date='Dec 30 2006, 04:29 PM

This can be found in General Info from Granny's "...The stock RX-7 rear axles are amazingly durable (internally, the parts are similar in size and even stronger than the Chevy 10 bolt that comes in the newer Z-28). While we offer bolt-in narrowed rear housings and axles for the 1st gen. cars, unless you are REALLY going to abuse it, we suggest you try the stock rear first. There are many V-8 powered 2nd gen RX-7s on slicks running mid-10 sec 1/4 mi times on the stock rear, a feat that requires 475-500hp. The clutch type limited slip up thru '88 is very strong 4 pinion style much like the diff design used in the Dana 60. Although it may be hard to believe, the rotary powered RX-7 drag racers are probably harder on the rear than the V-8 powered guys. The reasoning behind this is that most all rotary powered RX-7 drag racers use a manual transmission, a metallic clutch, and a heavy flywheel spinning at 9-10K rpm to assist the low torque rotary in launching the car. An incredible amount of stored energy is released into the rotary drivetrain to launch the car, enough to launch the car well even if the rotary engine died on the line. In the case of the V-8, plenty of torque is on tap to allow low rpm starts, also making it much easier to modulate the power to make the most of available traction."




where does that say that its talking about a NA rear end?
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Old 12-30-2006, 04:25 PM
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http://www.grannysspeedshop.com/ is the site. It doesnt provide a link to it, just have to read and follow links. Now I found my answer to my question, i provided the information, now if you need further information the link is provided above.
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