I want to install a 3.2 with a G50 gearbox in my SC.
I know I need to modifie the rear torsion bars housing to clear the G50.

Does any one have any recomendations regarding this?

 

Try: http://patrickmotorsports.com

 

Get out your wallet, and prepare yourself for a 100-pound-heavier transaxle.

(Then again, also prepare yourself for modern, smooth shifting).

 

Thanks Brian,

I hope the rear torsion bar tubes can be modify for less than 1500$ (the cost of the kit).
Any one had previous experience with such modification?

Jack,

I know the G50 is heavier than the 915, but 100 pounds seems very high. Where did you get this value?

 

I checked in various magazine, the average weight difference between a carrera 86 and a 87 is 60 pounds. The only major difference between the 2 models is the G50, so that 60 should be be the weight difference between a 915 and a G50.

Since the G50 is quit heavier than the 915, I won't make the swap if it cost me 1500$.

Anyone have any experience on Torsion tubes modification to clear the G50?

 

A direct measurement of the weights of the gboxes would be more trustworthy... Factory listed (total) vehicle weights will vary because of changes such as; once optional equipment becoming standard (foglamps, larger wheels, etc.), sound deadening & undercoating changes, component sources change, etc. etc. I would be surprised if the gbox contributed ALL of weight change.

 

Fred,

I would go with the shortened bellhousing option over the torsion bar modification. The PO of my 1988 930 installed a G50 using the torsion bar method. It's a much more difficult proposition, and requires more to be modified from the original car.

Good luck and let us know what you decide to do.

 

Hello

Been there more then once, you need a full rig and a hard days work if you can use all shortcuts ( Cuting open the rear seat buckets and reflap them later ). But we put in turbo torsion bars.

A G50 upgrade for the trany isn´t from interesst for people who like to drive fast.

The Porsche syncromesh is faster then the Borg Warner units. But you need more force and is also more critical to oiltemperatures and yes it wears faster.

To find out the benefits just try to drive a Porsche sync. trany and a borg warner sync trany without clutch. Good racers can shift up and down without changing the load.

There wight is very similar to the 915 3,2 with oilcooler somwhere at 70-75 kg


Grüsse

 

I'm not sure the G50 weighs 100 lbs. more than the 915. I've lugged both around and didn't notice much of a difference. I dropped off my G50 (that is, carried it myself) at the shop to have some work done and remember it being plenty heavy. If the 915 is 100 lbs. lighter, it would feel like nothing when picked up!

Careful with the clutchless shifts. If you don't do it just right, you'll make some pretty sickening noises. G50's shift smoother- with the clutch.

To do the 915/G50 swap, I believe you need to change out the gearshift assembly also. Reverse is left of 1st now. G50 clutches and flywheels are different and much more expensive than 915 stuff. You have to plumb the hydraulics (and change the pedal cluster?), plus change the brake reservoir (only $40 but just one more detail). Sounds like a big hassle. I'd rebuild the 915.

Good luck.

 

Hello

OK driving fast means racing on the track.

Now most from the more expirienced drivers learn to drive with straight gears and no synchromesh.
Now those cars are mostly monopostos with much lower wight but the do react more wild to load changes due shifting.

For training purposes get a early beetle or a E-type SI.

Grüsse