Porsche 944S
- Thread starter RussJones
- Start date
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.
I'm still looking for a Hawk reference for the 924/931/944/924S/944S 79-88.
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.
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
New member
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.
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
New member
May I ask how you would know that tidbit??
(The 209hp number, that is...)
Chris Camadella
ITS Porsche 944S
wpspeedracer
New member
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
wpspeedracer
New member
what % are u figuring from the RWHP figure? I'm at 178 w/air box on, 187 no air box.
Mark
#54
lateapex911
Super Moderator
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.
wpspeedracer
New member
"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
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