Project status....

[333pg333]

I think one of the problems with that type of transmission is that while you can flat shift it through the straight cut gears, being an H pattern still allows a mistake to turn into a 'money shift' which can get very expensive very quickly. Having said that, the short in car video seems to me to be really nice positive quick and precise. With little boost loss. I'm not sure what the 962 transmission was but I wouldn't be surprised if it wasn't made by someone else rather than the factory itself?

[SirLapsalot]

I think one of the problems with that type of transmission is that while you can flat shift it through the straight cut gears, being an H pattern still allows a mistake to turn into a 'money shift' which can get very expensive very quickly. Having said that, the short in car video seems to me to be really nice positive quick and precise. With little boost loss. I'm not sure what the 962 transmission was but I wouldn't be surprised if it wasn't made by someone else rather than the factory itself?

Typically you cannot flat shift a gearbox like that with an H-pattern. You need some amount of lift or torque down from the engine to disengage the dogs (straight cut gears play no role in that, only the dog rings).

You do have to be pretty deliberate and aggressive with your gearshift though, and having an H-pattern rather than a sequential probably made that pretty annoying/difficult/accident prone like you mention. IDK what gearbox the 962 had but I've blown apart a Porsche 910 gearbox before and IIRC it had synchro's (easier to shift/live with which might be related to Alans complaint).

[gruhsy]

I have posted this before on here and RL.

The Alan Johnson DME chip installed in my car in 1994 was fantastic.

I purchased it from MCL Porsche dealer in Vancouver British Columbia.

Any performance parts that MCL used all came from Alan Johnson with the exception of the AutoThority which was sub par in comparison quoting the head mechanic at that time.

[blade7]

A car dealer was second guessing Porsche .

In fairness, he was much more than a Porsche dealer...

A driver, a dealer and a good guy. I'd still guess Porsche knew better.

[333pg333]

I think one of the problems with that type of transmission is that while you can flat shift it through the straight cut gears, being an H pattern still allows a mistake to turn into a 'money shift' which can get very expensive very quickly. Having said that, the short in car video seems to me to be really nice positive quick and precise. With little boost loss. I'm not sure what the 962 transmission was but I wouldn't be surprised if it wasn't made by someone else rather than the factory itself?

Typically you cannot flat shift a gearbox like that with an H-pattern. You need some amount of lift or torque down from the engine to disengage the dogs (straight cut gears play no role in that, only the dog rings).

You do have to be pretty deliberate and aggressive with your gearshift though, and having an H-pattern rather than a sequential probably made that pretty annoying/difficult/accident prone like you mention. IDK what gearbox the 962 had but I've blown apart a Porsche 910 gearbox before and IIRC it had synchro's (easier to shift/live with which might be related to Alans complaint).

Sounds like there is a sensor allowing the fast (if not flat) shifting in that video. Probably actuated by the shifter itself. Yes, it needs dog rings. It would be interesting to hear why they didn't like that 'box? It does seem good in that video although he is clearly not driving flat out for whatever reasons.

[333pg333]

Read a little more about the car here. https://johnstraub.blogspot.com/2012/02 ... ofner.html

[SirLapsalot]

I think one of the problems with that type of transmission is that while you can flat shift it through the straight cut gears, being an H pattern still allows a mistake to turn into a 'money shift' which can get very expensive very quickly. Having said that, the short in car video seems to me to be really nice positive quick and precise. With little boost loss. I'm not sure what the 962 transmission was but I wouldn't be surprised if it wasn't made by someone else rather than the factory itself?

Typically you cannot flat shift a gearbox like that with an H-pattern. You need some amount of lift or torque down from the engine to disengage the dogs (straight cut gears play no role in that, only the dog rings).

You do have to be pretty deliberate and aggressive with your gearshift though, and having an H-pattern rather than a sequential probably made that pretty annoying/difficult/accident prone like you mention. IDK what gearbox the 962 had but I've blown apart a Porsche 910 gearbox before and IIRC it had synchro's (easier to shift/live with which might be related to Alans complaint).

Sounds like there is a sensor allowing the fast (if not flat) shifting in that video. Probably actuated by the shifter itself. Yes, it needs dog rings. It would be interesting to hear why they didn't like that 'box? It does seem good in that video although he is clearly not driving flat out for whatever reasons.

I think he’s just quickly lifting, either partially or completely. Maybe MM knows more?

I thought that the car had an OE motronic in it? If so Id be surprised if it was cable of a torque down for flat shifting.

In a sequential with paddles it’s easy to use the upshift paddle input for your torque down stage. Or with a up/down lever sequential it’s easy to do with a straingauged lever. With an H-Pattern is a bit more challenging…Could use the clutch switch I suppose but slightly harder to know if up or down shift is requested (certainly still possible though depending how the SW is written)

Sounds like they plan to use an M1 series ECU in the future for this car so, many opportunities for cool features at that time!

Yea he’s not driving flat out, but looks like an out lap to me. Cold tires plus priceless machine =/ flat out!

[j1nx3d]

Great thread, thanks for sharing.

MM, you may recall this car. It has been based here in New Zealand for the last few years. These photos are not mine. These were taken at the 2024 Scope Classic in Christchurch last weekend.

https://www.skope.com/about-skope/skope-classic/

R2

Photo credit R. Hooper

[michaelmount123]

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Suspension going back on, but still waiting for Penske to rebuild shocks. Interesting fabricated uprights, eh?

The Hewland trans shifting is all mechanical; no engine cut for shifts. I would always stab the clutch for upshifts, but all that's needed is a quick pause on the throttle and the next gear can be found. The clutch is needed for downshifts. Shifter and linkage by Fabcar are excellent.

That's an interesting GTR in New Zed! I recognize it from my old PCA race days here in the US. The engine is no longer a GTR, but clearly much of the car is. The car belonged to Dick Howe and was prepared by Eric Barrett.

[333pg333]

Great thread, thanks for sharing.

MM, you may recall this car. It has been based here in New Zealand for the last few years. These photos are not mine. These were taken at the 2024 Scope Classic in Christchurch last weekend.

https://www.skope.com/about-skope/skope-classic/

R2

Photo credit R. Hooper

Whoa...nice! So what is the format for that event? Was 'our hero' the fastest car therefore had the biggest delay on the start? Did it win? Scooted past that old Commodore Supercar V8 easily enough.