575 F1 differences - Ferrari Life
 
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post #1 of 5 Old 04-15-2013, 01:29 AM Thread Starter
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575 F1 differences


I drove a couple of F1 575's recently.

The first was an early 2003, 20K miles non-FHP car and the second was a 200528K miles FHP car.

In the 03 car, driving it like a manual (i.e. lifting off the throttle tochange) it was possible to get nice changes compared to the 'pause' change whenin auto mode. Even non-FHP, the car felt good in normal road conditions.

The 2005 FHP car felt so much more together on the suspension, but the F1change was also noticeably better and easier to get really nice changes.

So the question is why the better change? Was I just more used to the F1 anddrove it better or is it because it is a later car (post 52556 assemblynumber) with upgraded ECUs, is it mileage related or just a differencein cars.

Incidentally I also drove a 06 612 F1 HGTS and the change was much worsethan the 575, but the car has missed a few services so could just be a poorexample.
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post #2 of 5 Old 04-16-2013, 03:26 AM
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I am far from expert in this field, but I think that in 2004 that the F1 box in the 575 received some form of upgrated (to bring it in line with 612 F1 box possibly?).

I'm sure Terry could expand (or correct me?) on this????

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post #3 of 5 Old 04-16-2013, 09:09 AM
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All those questions are answered in the 575 Technial thread, but here is a list of upgrades so you can see for yourself.

135171 is a Nov 03 MY 04 and 141041 is an Apr 05 MY05 to give you a feel for model years. Note the F1 ECU/TCU for the 03 and 05 are identical, but a new F1 hydraulic system was introduced at Transmission 1869 somewhere during MY05 production. Should not have made much difference in feel on shifting, but the later cars had many, many mods including new shocks and mounts, steering position sensor, etc, that may have changed how you perceived shifting. Could be the 05 F1 system was better maintained, too. HGTC models did have a faster, smoother F1 TCU, but FHP cars came with whatever TCU normal cars had.
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File Type: doc 575M 575 SA Updates Rev 1.8.doc (45.0 KB, 111 views)

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Terry Phillips

Present: 575M 135171
Past: Dino 246 GT 02984, 365 GTB/4 14009, 308 GTS 25125

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post #4 of 5 Old 04-17-2013, 12:25 AM Thread Starter
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thanks Terry,

so did the new F1 ECUs that came with assembly number 52556 onwards not make a difference to the gear change on a FHP car?

From reading the technical thread the key difference then is the sterring sensor and associated changes from 52556 onwards and not the changes to the F1
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post #5 of 5 Old 04-17-2013, 09:31 AM
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Jem- There was no F1 ECU/TCU change at 52556, only a Hydraulic Shock Absorber ECU change to incorporate the steering position sensor inputs. Plus a new F1 pump relay, which is only a longevity improvement and does not affect shifting at all. That required a new wiring harness to the F1 system because the 30 and 50 amp pump relays have different connectors.

The new Motronic ECUs were again to match up with the steering position sensor. They integrated the signals from the steering positon sensor with those from the accelerometers to send a signal to the Shock ECU to stiffen the shocks on the outside wheel side when cornering. Accelerometers lag, so the steering position sensor signals were usually the first to reach the Motronic DME and Shock ECU.

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Present: 575M 135171
Past: Dino 246 GT 02984, 365 GTB/4 14009, 308 GTS 25125

Every day I look around, and if nobody is shooting at me, it is a pretty good day.
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