901 Transmission & 210+ HP

[jaudette3]

I'm getting ready to put my '67 back on the road after body & paint work. The engine has been built to 2.7 specs and will be sporting a new set of PMO's. With the Webers, it produced 210+ HP. When I got the car it had the original 901 rebuilt as a 4-speed in the conventional H pattern. I prefer a 5-speed and I have a 901 on hand and a 915 on hand, intending to install the 901.

My questions are: Is the 901 robust enough to handle the engine output? If I installed a 915 instead, what complications will I have to deal with?

Thanks for the help.

JohnA

[pu911rsr]

John,
I had a 914/6 with a High Compression 3.0 with 964 cams, probably good for 210-220 HP, ran with a 901 w/o problems, just gotta be careful in first gear is all. Sound like a great car.
Phil

[Mr9146]

Like Phil said, keep your foot out of it in 1st and you should have no problems ... except for blazing tires

[boxster03]

stick with the 4 speed good enough for the 930

[kenikh]

If you don't do smokey tire burnouts, you'll be fine.

[jaudette3]

stick with the 4 speed good enough for the 930

Funny you would say that. The P.O. converted to a 4-speed because he wanted to get first gear off of the weaker reverse spindle, similar to the 930. I think that's probably OK for hill climbs and auto-x, but when I run at Portland Intl. Raceway I feel like I could use more top-end on the straights. Also the 5-speed has shorter gears two through four.

The engine has 930 cams though - I've don't know if that's a good thing or not.

JohnA

[boxster03]

IMO my 901 5 speed has a too short 1st a too tall 2nd and 5th but 3rd and
4th are just right.

[pu911rsr]

John,
You don't want 930 cams in a NA motor, you don't even really want them in a turbo motor.
Phil

[one-two]

With 210 going through a 901 the weakest point would be the clutch. A standard clutch will burn out if you try anything fancy off the line. Think about a comp clutch.

[ErVikingo]

Strengthen the 901 (side plate and int plate), good clutch, no burnouts (no Porsche tranny drivetrain that) and you should have no problems.

I have more HP than that and have never had a problem.