Rear diff power capacity

[talondad]

Does anyone have any "real" info on how much power a rear diff system from an AWD will handle? I would like to build a hybrid with a V-6 or V-8, and then run the power into the independent rear suspension.
Any thoughts from other DSM'ers would be appreciated.
Bill

 

[jshepherd]

They like to start stripping out at around 750 whp

 

[TheObiJuan]

is that 750hwhp measured at all the wheels?
if so, how much can the rear end directly take. in a rear wheel drive configuration.

what kind of v6 or v8 talondad?
is this going to be na, turbo, supercharged, nitrous fed?

 

[talondad]

Not sure yet. Currently I am building a 351 Windsor stroked to 408ci, and placed in a Datsun Z car for my son. I have a 76 280Z wth a Datsun inline 6 with a 4bbl and header and giggle gas. For a DSM project maybe a Ford/Yamaha SHO V6 or an early Chevy 4.3 with a carb and headers. The DSM's are just such nice driving/handling cars it would be fun to have one with some real torque.
Bill

 

[TheObiJuan]

speaking of 4.3 chevy's.
why not put a nice syclone/typhoon motor with the 700r4 built.
that motor is a tq monster.
and sure can take a beating.

 

[transdude]

Originally posted by TheObiJuan
speaking of 4.3 chevy's.
why not put a nice syclone/typhoon motor with the 700r4 built.
that motor is a tq monster.
and sure can take a beating.

What's up Juan? Funny that you should mention that. Currently I am building a trans for what the owner claims is the world's fastest and quickest stock engine block Syclone. So far, it's deep into the tens. I'm gonna bet his block gives out before my trans!

 

[TheObiJuan]

is it guy?
if not who?

 

[transdude]

Originally posted by TheObiJuan
is it guy?
if not who?

No, his name is Peter. He also has a 750 rwhp single turbo Supra that he allows me to use for research and development. In other words, we are setting out to try and destroy some of my Toyota trannies in the name of science (no luck yet!). Anyway, I don't know if his claim about his Syclone is true, it's just what he is telling me. It will only be a matter of time until he breaks his stock block and puts in the Bowtie block anyway. I will put pictures of these and some other vehilces on our website http://www.importperformancetrans.com in the photo gallery section as soon as I get some time (which may be a while!)
-John

 

[JayHass]

Originally posted by jshepherd
They like to start stripping out at around 750 whp

Don't forget the weight of the vehicle has a lot to do with longevity/capacity as well. If he is building a potato chip on wheels, it'll probably take whatever he can throw at it.

 

[TheObiJuan]

if it is peter humbalias he is pretty damn fast.
i have to give him props.
i dont know of any others really fast on stock block named peter.
is he going bowtie twin turbo syclone if it breaks?
i remember him asking some guy selling his TT kit.


so back to the original question. how much can the rear end alone hold up to?

 

[jshepherd]

Hard to tell exactly how much hp/tq is getting to the rear. There is weight transfer so I would maybe guess 70% of the 750 hp and around 600 ftlbs torque. Either way you would want to convert it to a solid axle.

 

[transdude]

Originally posted by TheObiJuan
if it is peter humbalias he is pretty damn fast.
i have to give him props.
i dont know of any others really fast on stock block named peter.
is he going bowtie twin turbo syclone if it breaks?
i remember him asking some guy selling his TT kit.


so back to the original question. how much can the rear end alone hold up to?

Hi Juan, you know my boy Peter, small world huh? Sorry, I keep forgetting what this thread is about. Well if we're putting some real power down I say we put in a 9" Ford and scrap the i.r.s. but don't listen to me, I may not be the proper barometer for this kind of thing- I drive an 8 second car on the street. -John

 

[talondad]

I appreciate all the input, and yes it is getting a little off subject. After building my Z, and having a number of years under my belt, I want more than just a go-fast car. I am a hard core hot-rodder, but have come to enjoy a road with curves. Here in mid-Wisconsin we have a road that goes through an Indian Reservation that has to be among the best 26 miles of tarmac ever laid. It is a real ball on my motorcycles and in the Z, and after driving my son's Talon, I thought DSM's would make a nice ride too.
Bill

 

[transdude]

Originally posted by talondad
I appreciate all the input, and yes it is getting a little off subject. After building my Z, and having a number of years under my belt, I want more than just a go-fast car. I am a hard core hot-rodder, but have come to enjoy a road with curves. Here in mid-Wisconsin we have a road that goes through an Indian Reservation that has to be among the best 26 miles of tarmac ever laid. It is a real ball on my motorcycles and in the Z, and after driving my son's Talon, I thought DSM's would make a nice ride too.
Bill

I hear you. Will the installation of such a heavy motor in a DSM cause other handling problems that would be harder to correct than the lack of an i.r.s.? Just some food for thought. Also for the type of use that you are talking about I think the rear would hold up fine. Parts are more likely to break in a drag race situation where you hit the rear with all of that power and the car dead hooks. -John

 

[ItsStockOfficer]

750 hp? I bet with a decent RWD setup you will break even a 4 bolt with ease if it ever see slicks. And the car will handle bad,these cars are already nasty front heavy.

Whats real TQ? You can get over 300 ft/lbs on pump gas with a street modded awd DSM, no problem.

 

[talondad]

"REAL" torque is 500+ pulling from 2500 RPM and available without having to downshift. It is available in a 351 Ford stroked to 408 c.i. and done right should not be any heavier than the stock motor and transaxle/drive axles.

Bill

 

[ItsStockOfficer]

Originally posted by talondad
"REAL" torque is 500+ pulling from 2500 RPM and available without having to downshift. It is available in a 351 Ford stroked to 408 c.i. and done right should not be any heavier than the stock motor and transaxle/drive axles.

Bill

Yes, but if your thinking a SHO v6 or something with similair power levels your not gaining anything. If you plan n putting in a 40 CI engine then sweet, good luck making the rear end take it. And Id like to see a windsor motor in a DSM not messing up the weight distribution.

 

[talondad]

You are right, it may be more work than it is worth. I am currently building a 408c.i. SBF for my son's Datsun Z. All than power in a 2200# car is going to be an animal. I am just getting into this hybrid thing.
Bill

 

[smokehouse_83]

I think the best motor to put in the dsm for a rwd conversion would be a 6g72 (3000gt vr4 motor). I have been hearing that there are or soon will be stroker kits that bump them up to like 4.1 liters and these engines are putting out 600 hp on small 16g size turbos. The only problem with the engine is the car it is put in 3000GT's oh and the shity getrag tranny. I see John Shepherd is replying on this post and I would like to see him or some other big name try this thing out, why run a tube frame car with a 4g63 thats limited to around 1000hp when you can run a 4.1 liter 6g72 that putting out 1500 or so hp. I see the mitsu crowd is kinda laging behind in the race for the fastest import and I dont like it. This motor has way too much potential to not be used, lets put mitsu back on top. Just think, the fastest import in the world with a huge dsmtuners sticker on the side, and dont think but it wouldnt be a dsm well those two solara's arent supra's either!

Drew

 

[AW4G63]

I love stuff like this, My buddys been working on a 78 (or close) 1600 roadster with a 350, just has details to work out and its rollin.

 

[Cirus_93TSI]

a 3000gt engine in a dsm would be bad, if the 3000 wasnt so heavy it would be a real beast, but again that would end up ruining the weight balance and making the car extremely front heavy, a rwd 6g72 powered dsm would probally do one hell of a wheelie on slicks