sick ride now... that first dyno graph was amusing.

 

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'm in love....I just need to find money to do this now.

 

how balanced is this stroker kit? What kind of RPM capabilities does it have?

 

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 ??????

 

it's called turbo lag...

 

Please !!!!!! lol same turbo's . Nothing was listed in the build sheet that said bigger turbo's were used . Breathing better should shift the power over some but please .And George said the car made 7psi at part throttle , so lag wouldnt be it . And let Sam or George explain the tune on the car . Unless you were there and helped out with the build and tune.

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

 

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 .

 

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

 

I understand that . The real question is why was it started later in the second run and not the first ? And the fact a AT5 made max trq at 3400rpm in 5th gear.

I'll wait for an anawer from the people that actually worked on and tuned the car

 

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

 

very odd ...dont you think ????

But overlaying them proves nothing at all , other than you have the computer know how to do so .

 

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.

 

sorry, just thought I was being helpful so they were easier to compare

wasn't trying to "prove" anything

 

See the funny thing I see is that the first dyno shows 435trq at 3400rpm in a AT5 . I have a AT5 , if his tranny was stock or with just a VB or VB and trq convert . He still wouldnt see max trq at 3400rpm's . If I remember right , any time I was on the dyno . We would see a hesitation at around 4000rpm's . This was the trq convert locking up and I dont think you would make max trq till then or just after .

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 .

 

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 dyno on a Mustang dyno and always pull in 3rd gear . I always see the trq. converter lock up . We do 4th gear pulls with no difference in whp also . On a DynoJet where there is only the load of the roller , it may react differently...I dont know .

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 ??????

 

please pm me the price for that build..i have a 06mt...

 

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 wasnt able to find it...I didnt look that long though . When my TC locks up at 4100rpm's..I see it in a hesitation in the rpm's ...but it doesnt show up on the Mustng Dyno chart . Am I wrong in assuming it does show up on a DynoJet ?

I remember now PF's dyno does a little loop de loop when the TC locks up....lol Looks funny