Porsche 944S

[JimLill]

Let's start with Porsche Part #'s from the PET as it seems many online sources incorrectly show Turbo or S2 pads.

For late 944 and 944S NA, I show

F 944 351 951 02 and R 944 352 951 02

[924Guy]

Works for me. For the front, I show 944.351.951.02 for 924/931/944/924S/944S 79-88. 944T (and 944 S2) show either 964.351.939.02 or 965.351.939.03. For the rear, it's 944.352.951.02 for 924/931/944/924S/944S 79-88, and 964.351.939.02 for 944T/944S2. Yep, matches your #'s.

I'm still looking for a Hawk reference for the 924/931/944/924S/944S 79-88.

[924Guy]

I think I just spotted the problem with the brake pad size information you're using from Hawk. I thikn it's been staring me in the face. You're showing the HB199 and HB198, I'm thinking, for the 944? Well, per the diagrams in my Pegasus catalog (and I'm sure the same at hawkperformance.com) the dimensions shown on the drawings are for the backing plates, not the friction material. Naturally, this leads to an overestimation of the actual pad area. For the fronts it's slight but noticeable; for the rears it's substantially over. This can be seen fairly well on page 43 of the catalog at http://www.hawkperformance.com/docs/catalog_2004.pdf

My rear pad measurement, as noted, was a direct measurement of the friction material on the car (new stock pads). Calculations based on that matched fairly well with the pad area shown in the factory manual, as noted.

[JimLill]

I have been reducing the friction material by guestimate... using various pad drawings, not just Hawk, and my Dial Calipers and Calculator to adjust...

I'll put your measured numbers into my spreadsheet

The files are revised for the 924/944. The other cars are as I guessed. So now we see that the Porsche is nothing special braking power-wise. It might have a miniscule edge thermal-wise, with the additional swept area.

[ChrisCamadella]

Originally posted by JimLill@Dec 6 2005, 10:06 PM
Is that crank or WHP? With 188 to start, I'd think you could get a tad more..

- exhaust header etc
- chipped ECU
- revised pre MAF intake
- blueprint

all legal I think.......

[snapback]67474[/snapback]

May I ask how you would know that tidbit??
(The 209hp number, that is...)

Chris Camadella
ITS Porsche 944S

[Geo]

Originally posted by ChrisCamadella@Jan 23 2006, 08:51 AM
May I ask how you would know that tidbit??
(The 209hp number, that is...)

Chris Camadella
ITS Porsche 944S

[snapback]71692[/snapback]

Chris, I got that number directly from Jon in a discussion about the 944 and all it's NA variants. If this number is inaccurate I'm all ears.

[wpspeedracer]

Originally posted by ChrisCamadella@Jan 23 2006, 03:51 PM
May I ask how you would know that tidbit??
(The 209hp number, that is...)

Chris Camadella
ITS Porsche 944S

[snapback]71692[/snapback]

so is this RWHP number ?- I'm not anywhere near that for RWHP on Irish Mike's dyno and his is pretty liberal......

Mark
#54

[Geo]

Originally posted by wpspeedracer@Jan 26 2006, 10:26 AM
so is this RWHP number ?- I'm not anywhere near that for RWHP on Irish Mike's dyno and his is pretty liberal......

Mark
#54

[snapback]72320[/snapback]

That's crank on an engine brake dyno.

[wpspeedracer]

Originally posted by Geo@Jan 27 2006, 05:12 AM
That's crank on an engine brake dyno.

[snapback]72451[/snapback]

what % are u figuring from the RWHP figure? I'm at 178 w/air box on, 187 no air box.
Mark
#54

[lateapex911]

Originally posted by wpspeedracer@Jan 27 2006, 06:54 AM
what % are u figuring from the RWHP figure? I'm at 178 w/air box on, 187 no air box.
Mark
#54

[snapback]72456[/snapback]

Both are very stout numbers. The non air box number especially. Generally, 18% is the accepted figure for driveline loss.

No calculator here, but thats about 37 HP, so both numbers are ahead of the curve, unless I am missing something.

[Geo]

what % are u figuring from the RWHP figure? I'm at 178 w/air box on, 187 no air box.
Mark
#54
[/b]

Are you really trying to tell me you're getting 9 hp by eliminating the airbox? I'm having a very hard time believing that is real.

[wpspeedracer]

"Are you really trying to tell me you're getting 9 hp by eliminating the airbox? I'm having a very hard time believing that is real."

nothing to gain here - that's what the read-out says. Remember too that dyno's are done with no help of 100 mph + of intake air being ramed into the intake like on the track. Mile ran it with and without the air box just to get a comparison.....Also, all dyno's are relative - we were just trying different combinations of stuff - headers, mufflers, resonators, looking for anything to give us that extra hp / torque. On another dyno I could only show 150 RWHP. I was able to tune my exhaust this time for a little more torque.

Mark