GTS Dyno Runs - Stock(ish) Baseline
#1
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I finally got around to doing baseline dyno runs on my GTS. Results look good, as well as reasonable.
Only mods to the engine are GT resonators and RMB. Ambient air temps were in the low 60's.
Enjoy.
Only mods to the engine are GT resonators and RMB. Ambient air temps were in the low 60's.
Enjoy.
#3
Former Vendor
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How much power does the factory claim a stock GTS makes?
#4
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OEM Spec Book says 257kw / 350 HP, 500NM / 369 Torque(SAE)
FWIW, my point in posting here was not to claim a specific number, but to post a baseline for upcoming work as well as a comparison to Dennis K's car. I am using the same dyno with the same calibration on the dyno torque cell and run parameters. No attempts to spike numbers here...
As an interesting note, the parasitic test on my GTS showed less rolling friction than Dennis' car, his with DOT-R tires. I would think this makes sense.
Other note. The PSD faulted during the intial calibration. Just before the fault, the car looked very uncomfortable on the rollers. I am glad it was well strapped down.
FWIW, my point in posting here was not to claim a specific number, but to post a baseline for upcoming work as well as a comparison to Dennis K's car. I am using the same dyno with the same calibration on the dyno torque cell and run parameters. No attempts to spike numbers here...
As an interesting note, the parasitic test on my GTS showed less rolling friction than Dennis' car, his with DOT-R tires. I would think this makes sense.
Other note. The PSD faulted during the intial calibration. Just before the fault, the car looked very uncomfortable on the rollers. I am glad it was well strapped down.
#5
Nordschleife Master
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A question: Does the completely stock GTS have that valley in the torque curve around where the flappy opens?
#6
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The PSD faulted during the intial calibration.
Same on my GT when it was tested.
/Peter
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#9
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No sharktuning, yet. The runs were simply baselines.
The timing of this was VERY impromtu as I was at the dyno on other business. I had my son with me and we thought it would be fun to let him see Dad's car run against the other car (911) I was working on. It was definately fun stuff for him.
The timing of this was VERY impromtu as I was at the dyno on other business. I had my son with me and we thought it would be fun to let him see Dad's car run against the other car (911) I was working on. It was definately fun stuff for him.
#10
Former Vendor
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So, it looks like this baseline would indicate a drivetrain loss of almost exactly 10%, from what Porsche claims as a power output?
#11
Nordschleife Master
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10% driveline loss is nearly unheard of.
#12
Former Vendor
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Not sure that I'd bet my life on the accuracy of this dyno, however it certainly doesn't matter, as long as it is just a baseline data point.
#13
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My 93 GTS 5 spd made 313rwhp @5990rpm and 332 rwtrq @ 3435rpm baseline
With the X pipe, 330rwhp @ 5755rpm and 353 rwtq @3390rpm.
So your numbers seem about right but in a very weird spot. Whats up with the major dip around 3700 though???
With the X pipe, 330rwhp @ 5755rpm and 353 rwtq @3390rpm.
So your numbers seem about right but in a very weird spot. Whats up with the major dip around 3700 though???
#14
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thats pretty wishful thinking that the 928 transmission at 6000rpm is 90% efficient.
either way, great dyno run! those motors are the BOMB!! wish I had one as we could probably tweak it to the same hp im making now and i could still run my races in a "STock" powered 928!
MK
either way, great dyno run! those motors are the BOMB!! wish I had one as we could probably tweak it to the same hp im making now and i could still run my races in a "STock" powered 928!
MK
#15
Nordschleife Master
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What kind of dyno was that? I have run both my Automatic GTS's on a dyno here in town and they are both VERY CLOSE (50k miles on the '94 and 130k miles on the '92). The auto is particularly parasitic in my opinion. They were as follows:
'94 286rwhp/306rwtq
'92 283rwhp/304rwtq
Your numbers are WAY better than mine!
'94 286rwhp/306rwtq
'92 283rwhp/304rwtq
Your numbers are WAY better than mine!