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REAR DIFF POWER. HOW MUCH CAN IT TAKE?
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Author:  jeffgair [ Wed Jan 12, 2011 12:35 pm ]
Post subject:  REAR DIFF POWER. HOW MUCH CAN IT TAKE?
ANYBODY ANY IDEA HOW MUCH POWER THE STANDARD REAR DIFF AND DRIVESHAFTS CAN TAKE? {'67 1500DE LUX PR20) PLANNING ON 115HP MX5 ENGINE WHICH I WOULD GUESS WOULD BE OK. PROBLEM IS THERE IS A LOT OF AFTERMARKET TURBO KITS AVAILABLE FOR THIS ENGINE AND ME BEING ME I WILL EVENTUALLY WANT ONE.....ANY EXPERIENCE WITH BIGGISH HP ANYBODY ?

MANY THANKS, JEFF {SCOTLAND}

PS I HAD NO IDEA THERE WAS A BELLETT FORUM UNTIL RECENTLY. ITS MAGIC!
Author:  PR91 [ Thu Jan 13, 2011 1:52 pm ]
Post subject:  Re: REAR DIFF POWER. HOW MUCH CAN IT TAKE?
jeff.
my race car has about 170hp, and it lives without a worry.
and it's got a welded centre too, so that makes it work even harder.
i have broken one bellett diff in it tho... but that was my fault, not the diff's.

another race car some years ago had a 340hp rotary in it... with a standard (welded again tho) bellett diff and 10" wide racing slicks.
never broke it....
but the weak link is the 4 little bolts that hold the axles in the diff to the axles for the wheels.... put good, high tensile ones in, or it'll snap 'em like twigs!

cheers.
Author:  jeffgair [ Thu Jan 13, 2011 3:58 pm ]
Post subject:  Re: REAR DIFF POWER. HOW MUCH CAN IT TAKE?
pr91

This is music to my ears!!! Over here in the uk the powers at be have a points system for modified cars as follows; original car body 5 points, original engine 1 point, original steering rack 2 points, both original axles 2 points,original suspention 2 points. If the car in question has less than 8 points in total it has to go for an IVA test, which is totally unpassable for any old car for about a million reasons.

Was presuming original diff would be to puny for a (turboed!?) mx5 engine, but from your info it will be fine. Planned on mx5 engine, Honda s2000 6spd box and general suspention meddling so will be ok - no sva test needed! Happy days!

Thanks, Jeff
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