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 https://www.nopistons.com/forums/pub...IR#>/smile.gif

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. https://www.nopistons.com/forums/pub...IR#>/boink.gif

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.

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.

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.

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.

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.

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?

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.

lata, theyre talking about the turbo diff there, but i blew a diff on my n/a w/ an exhaust and intake.



all it takes is a hard launch, the right tires and a good clutch.



everything is relative to the driver, hell demetrios has a 9-second alcohol burning fd with a stock trans and diff.



kevin.

low hp and tq will break more stuff than high. Wheel hop kills.

I can only assume that by "stock" they are hinting at N/A https://www.nopistons.com/forums/pub...R#>/tongue.gif

Lata,



your question, as broad as it is, relates to all of the things everyone has been trying to explain. The N/A lsd (from what I gather) is only as good as the rest of the SUPPORTING parts such as well, the driveline. Transmission, Clutch, Flywheel, Shaft, Halfshafts, blah blah blah. Your question "how much HP can N/A diff take? 90 GXL" is a highly talked about topic. The fact of the matter is that most people dont even bother with using the stock Diff. They upgrade to the turbo diff that can handle the power they are looking for. Maybe not in a Chevy 350, or LS1 or whatever but you get the idea. So instead of getting on the defensive because your question was not answered the way you wanted it, maybe consider asking differently. Maybe something like "I have this, this, this, and this. But I ALSO have a N/A diff. How much do you think this thing can handle? Should I upgrade or would I be safe AS LONG as I dont hop the tires and drive the car like its a race car"



I am also using an N/A diff, but I have a turbo motor and all the juicy things that go along with it. I dont plan on driving the car as if it is a race car because I do not have it built to that spec yet. I will eventually find a Turbo II diff and half axles but thats something for future mods. I hope you consider re-phrasing your question next time instead of attempting taking on the minds of these guys/(gals?) on here (who DO know what they are talking about.) They have helped me out in every question I have asked so far anyways...



-Mr B.

Mr. B, Dont worry about *it*. nor should anyone on this forum. I realized the mistake I made. I posted on a forum in hopes that the thread i was looking for was here. But as I stated before, I remembered where it was. The posts were all on the section for non-rotor swaps into FC. Thus, people without the experience in that section, well, frankly don't know and why should they care about it? I bet over half of this forum dont know what a W201 is, is not a bad thing, but rather a misplaced question if i were to ask anything about it here. Which in turns was my question. Misplaced.

why would somebody come onto a website with a domain like nopistons.com and ask questions that only help his V8 conversion?



misplaced. lol.

Man, you're a DICK! lol https://www.nopistons.com/forums/pub...1047683785.gif but, I like that https://www.nopistons.com/forums/pub...#>/biggrin.gif



I agree with you 100%. What does it matter to know or not know what a "W201" is if all WE care about is the 13b and variants? Yes, I admit you can find me snooping around a crate 604 (do you know what that is?) V8 race car motor on the weekends at the dirt track. but thats a completely different setting all together. The fact of the matter is YOU came to US asking about a V8 setup that while is not uncommon in the FC chassis I will admit, but then when people tried asking about what you planned on doing, YOU took the offensive and thats not cool. All they were doing was trying to give advice without knowing anything really about your plans other than you have an N/A diff. But I think this thread is about done, there is no need in even dragging it out into some he said she said bullshit.



-B.