RX-7 rearend in a miata
#23
Originally Posted by turbotony
hey guys thanks for the info I was wondering if it was worth fabricating some stuff for this rearend & if its even marketable.
thanks again tony
thanks again tony
#25
Originally Posted by turbotony
hey guys thanks for the info I was wondering if it was worth fabricating some stuff for this rearend & if its even marketable.
thanks again tony
thanks again tony
If you ever decide to fab a kit for it,I will be the first one in line to buy one.
#26
I didn't say the Turbo II or FD rear-ends were "worth" fabricating for, I said it would be necessary to fabricate some parts in order to use them. Personally, I don't think they are worth fabricating parts for; if you're in need of something stronger than the 7" rear-end, fabricate parts for using a 7.5" T-bird/Cougar rear-end or an 8-9" rear-end from a Ford or GM car.
#29
I'm not talking about putting a solid rear-end in a Miata; that'd be useless.
I'm guessing you've never seen or read about the details of any of the 302/351, LS1/2/6 or 3.5L BOPR V8 conversions for the Miata, eh?
They use independent rears. Both 7.5" and 8.8", as I recall. Using those rather than the Mazda 8" rear has these benefits, in no particular order:
Cheaper.
Easier to find.
Easier to source parts for.
Many gearsets/ratios available.
Stronger (at least in the case of the 8.8").
If you're going to have to fabricate a custom mount, get a custom driveshaft and half-shafts built, you might as well go with the American rear-end(s).
I'm guessing you've never seen or read about the details of any of the 302/351, LS1/2/6 or 3.5L BOPR V8 conversions for the Miata, eh?
They use independent rears. Both 7.5" and 8.8", as I recall. Using those rather than the Mazda 8" rear has these benefits, in no particular order:
Cheaper.
Easier to find.
Easier to source parts for.
Many gearsets/ratios available.
Stronger (at least in the case of the 8.8").
If you're going to have to fabricate a custom mount, get a custom driveshaft and half-shafts built, you might as well go with the American rear-end(s).
#33
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Originally Posted by turbotony
would you rather have a solid rearend like a GM or Ford or independent rearend like a rx-7 TII & miata?
Turbo II's have viscous lsd's why would u want one???
#34
The S4 Tubo II had a clutch-type diff., while the S5 has t he viscous.
As for the tranny, the 6-speed Miata/RX-8 tranny is stronger than the 5-speed, will retain the PPF and will bolt up to the engine without any extra work really.
The way I see it, if you want reliability, you follow these guidelines:
<250rwhp = 5-speed tranny w/ 7" rear
250-350rwhp = 6-speed tranny w/ 7" rear (the 7" rear has been used successfully with as much 470rwhp)
>350rwhp = T56 tranny with 7.5=8.8" rear
There's really no point in using the Turbo II tranny and rear unless you demand on keeping all the parts Mazda-sourced and you like notchy, difficult to shift trannies that're difficult to locate.
As for the tranny, the 6-speed Miata/RX-8 tranny is stronger than the 5-speed, will retain the PPF and will bolt up to the engine without any extra work really.
The way I see it, if you want reliability, you follow these guidelines:
<250rwhp = 5-speed tranny w/ 7" rear
250-350rwhp = 6-speed tranny w/ 7" rear (the 7" rear has been used successfully with as much 470rwhp)
>350rwhp = T56 tranny with 7.5=8.8" rear
There's really no point in using the Turbo II tranny and rear unless you demand on keeping all the parts Mazda-sourced and you like notchy, difficult to shift trannies that're difficult to locate.
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