Stock 2002 Gt2 Dyno Results
10-01-2006, 05:08 PM
#1
Three Wheelin'
Thread Starter
Stock 2002 Gt2 Dyno Results
TPC in Jessup, Md ran her on the dyno for me. It was about 65 degrees and low humidity. I couldn't believe these numbers either. I felt like a proud father. That's HP to the wheels. Mike Levitas, who won the Rolex 24 hours at Daytona in a Gt3 predicted 440 hp. He was right on. He told me stock Gt3's normally pull 355 to 360 hp to the wheels, so he wasn't surprised that a 2 pulled 444. The numbers are corrected for air temp, humidity, elevation and some other variables I'm not sure of, it's a pretty nice dyno. Uncorrected the numbers were higher, 460 plus I think. But those numbers are not accurate.
We conducted a few more runs an hour or so later and she consistantly pulled 435 to 440, so I believe the numbers are as accurate as can be, short of a trap speed. As for modifying it, just going to flash the ECU for now. I'm hoping for an additional 60 to 70 horse to the wheels. Taking it one mod at a time. Put on some lower rear tow arms and that made a huge difference in stability and how straight the car tracks. The best 450 dollars I ever spent.
We conducted a few more runs an hour or so later and she consistantly pulled 435 to 440, so I believe the numbers are as accurate as can be, short of a trap speed. As for modifying it, just going to flash the ECU for now. I'm hoping for an additional 60 to 70 horse to the wheels. Taking it one mod at a time. Put on some lower rear tow arms and that made a huge difference in stability and how straight the car tracks. The best 450 dollars I ever spent.
10-01-2006, 05:15 PM
#2
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Very nice numbers. With a chip intake and exhaust, it seems like its the total package for any car that is beefed up with the K24 from the factory.
What do stock 996 TT put out to the wheels?
What do stock 996 TT put out to the wheels?
10-01-2006, 10:22 PM
#4
Drifting
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or 415 and 444. Close enough.
Good job on the dyno, you have a fabulous car.
By the way, I am dead even down a mile long straightaway with a stock GT2 (has a fabspeed)
I have little k-16 turbos PSI 480 kit, PSI quiet exhuast, diverter valves, BMC air filter.
they are identical rolling acceleration.
You add a chip and exhuast and you kill my current set-up
MK
Good job on the dyno, you have a fabulous car.
By the way, I am dead even down a mile long straightaway with a stock GT2 (has a fabspeed)
I have little k-16 turbos PSI 480 kit, PSI quiet exhuast, diverter valves, BMC air filter.
they are identical rolling acceleration.
You add a chip and exhuast and you kill my current set-up
MK
10-01-2006, 10:31 PM
#5
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The dynojet reads VERY optimistic. Porsche will not release a regular production car with more than a 3% hp spread up or down on advertised cranknumbers. Fact.
However, there hp can be counted on under the most ardent /harsh conditions...........not like some other manufacturers.
The most accurate chassis dyno is the MAHA but the numbers it spits out are usually low, read real.
The most you will see from a software change without exhaust is about 50 CRANK hp.
However, there hp can be counted on under the most ardent /harsh conditions...........not like some other manufacturers.
The most accurate chassis dyno is the MAHA but the numbers it spits out are usually low, read real.
The most you will see from a software change without exhaust is about 50 CRANK hp.
10-02-2006, 12:15 AM
#6
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I agree with POLE,
996TT with little K-16's (like mine):
415 + ECU and exhaust (50+18) == 483 (Hence PSI 480 kit) not 500 not 510 not 520, etc.
480 HP at the crank, period.
everything else is silly conversions, adjustments etc.
I do like the fact he ran a baseline, and ideally he should have done it on the day
he does the ECU uprade with SAME gas, and temperature/weather conditions, dyno operator,
etc. It still may be a useful tool, especially if dyno is independent of who provided mods.
996TT with little K-16's (like mine):
415 + ECU and exhaust (50+18) == 483 (Hence PSI 480 kit) not 500 not 510 not 520, etc.
480 HP at the crank, period.
everything else is silly conversions, adjustments etc.
I do like the fact he ran a baseline, and ideally he should have done it on the day
he does the ECU uprade with SAME gas, and temperature/weather conditions, dyno operator,
etc. It still may be a useful tool, especially if dyno is independent of who provided mods.
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10-02-2006, 12:02 PM
#8
Rennlist Member
Originally Posted by Woodster
or 415 and 444. Close enough.
Good job on the dyno, you have a fabulous car.
By the way, I am dead even down a mile long straightaway with a stock GT2 (has a fabspeed)
I have little k-16 turbos PSI 480 kit, PSI quiet exhuast, diverter valves, BMC air filter.
they are identical rolling acceleration.
You add a chip and exhuast and you kill my current set-up
MK
Good job on the dyno, you have a fabulous car.
By the way, I am dead even down a mile long straightaway with a stock GT2 (has a fabspeed)
I have little k-16 turbos PSI 480 kit, PSI quiet exhuast, diverter valves, BMC air filter.
they are identical rolling acceleration.
You add a chip and exhuast and you kill my current set-up
MK
May father said you were getting some great times up there this weekend.
We need to do a few things to the GT2 to get it back to leaving you behind on the straight.
10-02-2006, 01:01 PM
#9
Three Wheelin'
Thread Starter
Originally Posted by pole position
The dynojet reads VERY optimistic. Porsche will not release a regular production car with more than a 3% hp spread up or down on advertised cranknumbers. Fact.
However, there hp can be counted on under the most ardent /harsh conditions...........not like some other manufacturers.
The most accurate chassis dyno is the MAHA but the numbers it spits out are usually low, read real.
The most you will see from a software change without exhaust is about 50 CRANK hp.
However, there hp can be counted on under the most ardent /harsh conditions...........not like some other manufacturers.
The most accurate chassis dyno is the MAHA but the numbers it spits out are usually low, read real.
The most you will see from a software change without exhaust is about 50 CRANK hp.
Last edited by 9Eleven; 10-02-2006 at 01:36 PM.
10-02-2006, 01:09 PM
#10
Drifting
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O.T.
Thanks Luis (Jr.), your father is a good sport and we had alot of fun on the track!
We were both turning some "frighteninly fast times" and yes his car was my reference point
as I followed him down the straight! (for those that don't know, Luis Sr. has a gorgeuos GT2
that is stock (motorwise) other than one of the louder FABSPEED exhausts! He is a great driver
as well!! MK
He is one ECU tune away from walking me on the straights!
Thanks Luis (Jr.), your father is a good sport and we had alot of fun on the track!
We were both turning some "frighteninly fast times" and yes his car was my reference point
as I followed him down the straight! (for those that don't know, Luis Sr. has a gorgeuos GT2
that is stock (motorwise) other than one of the louder FABSPEED exhausts! He is a great driver
as well!! MK
He is one ECU tune away from walking me on the straights!
10-02-2006, 01:28 PM
#11
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I agree with 9Eleven: those were probably very accurate numbers (even though nobody expected it).
Maybe you're thinking of the Mustang dynos???? (always optimistic)
Maybe you're thinking of the Mustang dynos???? (always optimistic)
10-02-2006, 01:33 PM
#12
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I was at the factory last year and this is what I saw and was told. Porsche dyno's every engine. If it puts out less than advertised HP, they either discard it or figure out why it didn't meet specs. If it is over 5% greater than advertised spec, they de-tune it. Only engines that produce at least spec HP or up to 5% greater get released.
10-02-2006, 01:41 PM
#13
Three Wheelin'
Thread Starter
How do we explain a Gt3 that traps 117 mph, with 380 hp, having the same trap speed as an '04 c5 Z06 with 405 hp. Both vehicles also weigh about the same. If trap speed is an indicator of hp, then the Gt3 is putting out around 400 to 405 crank horsepower or their drive train loss is substantially lower.
10-02-2006, 02:21 PM
#15
Three Wheelin'
Thread Starter
Originally Posted by mitch236
I was at the factory last year and this is what I saw and was told. Porsche dyno's every engine. If it puts out less than advertised HP, they either discard it or figure out why it didn't meet specs. If it is over 5% greater than advertised spec, they de-tune it. Only engines that produce at least spec HP or up to 5% greater get released.