F1 and clutch workings

http://aldousvoice.com/2014/08/07/ferrari-f1-clutch-operation/

 

Thanks, interesting article.


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Remember that all of Aldous' articles are based around the 360, although the general principles are similar for all F1 Ferraris and other (Maseratis for instance) F1 cars. The early 360s had a TCU which did not have provisions for manually adjusting PIS, but all 575s and early 612s (same clutch) do have that capability. Aldous also has a great tutorial for mechanics when setting up a clutch for optimum life and operability. It involves having the car up on a lift and then adjusting PIS to the point where the drive wheels just barely do not turn. Trial and error, but the more Ferraris a mechanic adjusts for PIS, the quicker he develops rules of thumb for the different models. PIS on 360s is usually around 4.7 mm or so, and 575s and early 612s around 7.7 mm or so, because of the thicker clutch plate and differences in geometry.

 

Did the 612 and the 430 share/use the same clutch/ transmission unit ?

Edward

 

No, not even close.

 

PIS is different for just about every individual Ferrari, those were just some commonly seen numbers and what my 575 was at last fluid change, bleed and PIS adjustment. PIS is set electronically with a diagnostic tool like an SD-2, SD-3, Leonardo, etc. My techs use AutoEnginuity software.

 

so does the PIS can be adjusted on the 599?

 

Taz, if able, could you please provide a link to this particular article? I think I have read every article on Aldous's website, but I cannot find any reference for the procedure you mentioned (putting the car on a lift while setting PIS...). I believe I fully understand the concept: 1) Have the car on a lift so that the rear wheels are free to turn. 2) Engine running, select 1st gear (or reverse?). 3) adjust PIS with appropriate tool until the wheels just barely do not turn and/or the transmission input shaft speed just barely reads 0 rpm. I know the article you mentioned is for the 360, but the theory of operation is the same and I believe it should work on all the F1 cars through 599. Am asking because I'd like to do a PIS optimization on my pre-OTO 612. Thanks, Taz!

 

Long time ago. I believe the best way now is to lower the PIS and keep checking the output shaft for movement. When it moves, raise the PIS until it stops. No need for a lift to do that.

 

Ok, sounds good. Thank you.