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914World.com _ 914World Garage _ Billlet intermediate plates?

Posted by: aircooledboy Jan 3 2005, 08:22 PM

Saw these on Ebay:http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1&item=4515259715&category=6755

Would this improve the 901's ability to handle horsepower? IPB Image

Posted by: Sammy Jan 3 2005, 10:54 PM

IMO, no it wouldn't make much difference.

The 901 has a few weaknesses, the biggest is the 1st and reverse gear hung over the back end unsupported, not much you can do about that.
the second is the case has a tendency to warp under high torque loads, the intermediate place may help a little with that. The third weakness is that the pinion gear is a bit skinny and under high torque it can deflect and climb the ring gear, ruining the proper gear mesh and breaking things.
If you have a bunch of money you need to get rid of, buy that plate. just don't expect it to solve all the limitations of the 901.

Posted by: Series9 Jan 3 2005, 10:59 PM

QUOTE (Sammy @ Jan 3 2005, 09:54 PM)

The 901 has a few weaknesses, the biggest is the 1st and reverse gear hung over the back end unsupported, not much you can do about that.

IPB Image This is the biggest one, IMO.

Posted by: JOHNMAN Jan 4 2005, 12:30 AM

I don't know if the billet intermediate plate is worth it or not. I installed one in a 901 and never have tried it (we converted to 915).

I agree that the first/reverse hung out behind the intermediate plate is a big weakness, but in my opinion, when HP and torque are bumped up, the next weak spot seems to be that the mainshaft and pinion shaft warp/bend/deflect and let the gearstacks climb each other (which in my experience generally eats 4th gear).

Perhaps this is a result of the pinion gear climbing the ring gear, but I don't know for sure.

Posted by: aircooledboy Jan 4 2005, 08:44 AM

Definitely no pile of money I'm looking to light on fire around here. IPB Image

I figured that if the solution to the HP handling problem was as simple as a billet plate, that would be the talk. But, since I don't know squat about the details of the issue, I knew I could ask here and get the real dope.

Posted by: ppickerell Jan 4 2005, 10:12 AM

Rich at HPH strongly recommended the Billet plate in my rebuild currently underway. Perhaps he would care to comment.

Posted by: aircooledboy Jan 4 2005, 11:00 AM

Hmmm,
The plot thickens IPB Image

Posted by: curtis Jan 4 2005, 11:43 AM

A 904 mainshaft in conjunction with the billet intermediate plate and a few other mods that I cant think of at the moment would be about as far as you could go on the 901. This would safely handle about 200-240hp.