GT Motorsports: 4.2L Stroker, VPro, APS TT, GTM BUILT 5AT, 600RWHP! *PIX*
10-31-2007, 09:42 AM
#102
George/Sam,
I'd like to see what you all suggest for trans cooling with these high HP/built 5AT transmissions. I'm now on my 3rd trans cooling setup and looking to do another soon. It (heat) is certainly an issue for any kind of sustained racing.
I'd like to see what you all suggest for trans cooling with these high HP/built 5AT transmissions. I'm now on my 3rd trans cooling setup and looking to do another soon. It (heat) is certainly an issue for any kind of sustained racing.
11-23-2007, 03:21 PM
#105
George and or Sam
I have a question for you . And Im sure Im not the only one that has seen the difference's in the before and after graphs . Great after dyno graph by the way . Now the question
The before graph shows max trq. of 432trq. at just over 3400rpm's with 275whp at the same time . The after dyno shows 170trq. and 150whp at 3900rpm's 500rpm's later than the before dyno . WHATS UP WITH THAT ???
With the before dyno making 435trq at 3400rpm's , you would think the trq. converter is locked up already . Is this the same car in both dyno's ??????
I have a question for you . And Im sure Im not the only one that has seen the difference's in the before and after graphs . Great after dyno graph by the way . Now the question
The before graph shows max trq. of 432trq. at just over 3400rpm's with 275whp at the same time . The after dyno shows 170trq. and 150whp at 3900rpm's 500rpm's later than the before dyno . WHATS UP WITH THAT ???
With the before dyno making 435trq at 3400rpm's , you would think the trq. converter is locked up already . Is this the same car in both dyno's ??????
Last edited by booger; 11-24-2007 at 07:30 AM.
11-23-2007, 03:44 PM
#107
Originally Posted by sentry65
it's called turbo lag...
Sam said he likes to start the dyno later so the trq. converter is locked up . But it clearly shows [ if its a AT5 dyno ] that it made 435trq @ 3400rpm and in the after dyno its 45xtrq @ 4900rpm or there abouts
Last edited by booger; 11-24-2007 at 07:29 AM.
11-23-2007, 04:18 PM
#108
I have another legit question for Sam Or George
In the first post , you mentioned this motor was built by SP and had SP cams in it . IS this Sound Performance ?
Was this car tuned by SP ? Hard to believe that shop let that car out of the shop with that tune on it .
You also posted that the owner wanted his plates to be true [545whp] What was wrong with the built motor it had in it that it couldnt have been tuned to 550whp ?
Im sure others are wondering the same thing that I am . But for some reason dont want to ask .
In the first post , you mentioned this motor was built by SP and had SP cams in it . IS this Sound Performance ?
Was this car tuned by SP ? Hard to believe that shop let that car out of the shop with that tune on it .
You also posted that the owner wanted his plates to be true [545whp] What was wrong with the built motor it had in it that it couldnt have been tuned to 550whp ?
Im sure others are wondering the same thing that I am . But for some reason dont want to ask .
Last edited by booger; 11-23-2007 at 05:06 PM.
11-23-2007, 04:28 PM
#109
this is pretty simple
if you start a run at 3000 rpms and floor it in 4th gear, you don't start with full boost
if your next dyno run you start at 3800 rpms - again, you don't instantly start with full boost even though the previous run already had full boost at 3800 rpms since it started the run at earlier rpms
another reason some tuners like to start the dyno runs later is because it's less wear on the car for the sake of tuning where most of the focus is going to be mid-high rpms. A lot of shops will do their "final" dyno by starting a run at around 2000 rpms for the sake of showing off the extra beefy curve since the turbos will spool a little earlier by starting the run at lower rpms
if you start a run at 3000 rpms and floor it in 4th gear, you don't start with full boost
if your next dyno run you start at 3800 rpms - again, you don't instantly start with full boost even though the previous run already had full boost at 3800 rpms since it started the run at earlier rpms
another reason some tuners like to start the dyno runs later is because it's less wear on the car for the sake of tuning where most of the focus is going to be mid-high rpms. A lot of shops will do their "final" dyno by starting a run at around 2000 rpms for the sake of showing off the extra beefy curve since the turbos will spool a little earlier by starting the run at lower rpms
Last edited by sentry65; 11-23-2007 at 05:01 PM.
11-23-2007, 04:36 PM
#110
Originally Posted by sentry65
this is pretty simple
if you start a run at 3000 rpms and floor it in 5th gear, you don't start with full boost
if your next dyno run you start at 3800 rpms - again, you don't instantly start with full boost even though the previous run already had full boost at 3800 rpms because it started at 3000 rpms and was fully spooled by 3800
another reason some tuners like to start the dyno runs later is because it's less wear on the car for the sake of tuning where most of the focus is going to be mid-high rpms. A lot of shops will do their "final" dyno by starting a run at around 2000 rpms for the sake of showing off the extra beefy curve since the turbos will spool a little earlier by starting the run at lower rpms
if you start a run at 3000 rpms and floor it in 5th gear, you don't start with full boost
if your next dyno run you start at 3800 rpms - again, you don't instantly start with full boost even though the previous run already had full boost at 3800 rpms because it started at 3000 rpms and was fully spooled by 3800
another reason some tuners like to start the dyno runs later is because it's less wear on the car for the sake of tuning where most of the focus is going to be mid-high rpms. A lot of shops will do their "final" dyno by starting a run at around 2000 rpms for the sake of showing off the extra beefy curve since the turbos will spool a little earlier by starting the run at lower rpms
I'll wait for an anawer from the people that actually worked on and tuned the car
11-23-2007, 04:43 PM
#111
here's an overlay of the two graphs
you're going to be waiting until monday when sam gets back in the country
I'd think the initial run was just trying to see what the car was doing through all the rpms, but once he ironed the kinks out didn't have a need to do his tuning that low in the powerband and put unnecessary wear on the engine
you're going to be waiting until monday when sam gets back in the country
I'd think the initial run was just trying to see what the car was doing through all the rpms, but once he ironed the kinks out didn't have a need to do his tuning that low in the powerband and put unnecessary wear on the engine
Last edited by sentry65; 11-23-2007 at 04:54 PM.
11-23-2007, 04:53 PM
#113
I know I'm not Sam or George, but hope you don't mind the interjection:
I think the SP represented Scott's Performance...
https://my350z.com/forum/showpost.ph...7&postcount=85
The two runs are completely different I believe because the transmission was built in the interval. If the torque converter was altered (I believe they performed the stage 3 upgrade on the 5AT), then the dyno graphs are going to be completely different. And I believe that dyno would have to be in 3rd gear because I don't see the blip where the TC locks up.
I think the SP represented Scott's Performance...
https://my350z.com/forum/showpost.ph...7&postcount=85
The two runs are completely different I believe because the transmission was built in the interval. If the torque converter was altered (I believe they performed the stage 3 upgrade on the 5AT), then the dyno graphs are going to be completely different. And I believe that dyno would have to be in 3rd gear because I don't see the blip where the TC locks up.
11-23-2007, 05:00 PM
#114
Originally Posted by booger
very odd ...dont you think ????
But overlaying them proves nothing at all , other than you have the computer know how to do so .
But overlaying them proves nothing at all , other than you have the computer know how to do so .
wasn't trying to "prove" anything
11-23-2007, 05:01 PM
#115
Originally Posted by rcdash
I know I'm not Sam or George, but hope you don't mind the interjection:
I think the SP represented Scott's Performance...
https://my350z.com/forum/showpost.ph...7&postcount=85
The two runs are completely different I believe because the transmission was built in the interval. If the torque converter was altered (I believe they performed the stage 3 upgrade on the 5AT), then the dyno graphs are going to be completely different. And I believe that dyno would have to be in 3rd gear because I don't see the blip where the TC locks up.
I think the SP represented Scott's Performance...
https://my350z.com/forum/showpost.ph...7&postcount=85
The two runs are completely different I believe because the transmission was built in the interval. If the torque converter was altered (I believe they performed the stage 3 upgrade on the 5AT), then the dyno graphs are going to be completely different. And I believe that dyno would have to be in 3rd gear because I don't see the blip where the TC locks up.
And to add to this.....Any time you try to go WOT before or around 3500rpm's , the tranny down shifts by its self ...even in manual mode . So it possible that he did the first dyno in 3rd or 4th gears and the 2nd one in 5th .
Even if Im totally wrong on the tranny . I still would like to have GTM answer the other questions at hand here .
Last edited by booger; 11-23-2007 at 05:25 PM.
11-23-2007, 05:42 PM
#117
Originally Posted by rcdash
If they did the run in 3rd gear, then the TC doesn't lock at all - so no hesitation at 4k. Dyno graphs on the 5AT are weird.
I still have the question of
1 ...Is Scotts Performance that built this motor ? why wasnt it good enough to get the whp the customer wanted ?
2- Did SP tune this car ? If not...who did put such a terrible tune on it and then told the customer he made 545whp ?
3- was the first dyno actually the same car ?
4- Why wasnt the A/F graph included in the first [ before ] dyno . But was posted in the second ??????
Last edited by booger; 11-24-2007 at 10:43 AM.
11-23-2007, 05:50 PM
#119
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Booger...my TC locks up at 4100....Theres a thread titled Performance Factory: stock block, 5at in this section that has my dyno graph on it, if anyone wants to put it up go ahead..It shows how a DJ graphs a 5at
11-23-2007, 06:12 PM
#120
Originally Posted by coachk
Booger...my TC locks up at 4100....Theres a thread titled Performance Factory: stock block, 5at in this section that has my dyno graph on it, if anyone wants to put it up go ahead..It shows how a DJ graphs a 5at
I remember now PF's dyno does a little loop de loop when the TC locks up....lol Looks funny
Last edited by booger; 11-23-2007 at 06:19 PM.