New vortech dyno charts at GTM 477.8 whp 383 tq
Originally Posted by Barzten1
Hey Joel I didnt mention any names. LOL.....Ill be the first one to admit I took advantage of the moment. You know Im always down to line them up. I run because I like to run. I win everytime I hear my car at 6k rpm. 
That car is gunna be a beast when you get it tuned and figured out. Those 20's are going to kill your launch but they look hot.
That car is gunna be a beast when you get it tuned and figured out. Those 20's are going to kill your launch but they look hot.I'll race both of you
Originally Posted by sentry65
here's the pictures of the pump assembly and some other pics of my car
the pump assembly had that blue fitting which is really loose. Then one of the CJM lines connects to the attachment point to the right of it. Something was up with that bag thing. And some hole (possibly where the blue fitting connects to?) was possibly not the right size
the pump assembly had that blue fitting which is really loose. Then one of the CJM lines connects to the attachment point to the right of it. Something was up with that bag thing. And some hole (possibly where the blue fitting connects to?) was possibly not the right size
if my memory serves me right, doesnt that blue fitting that you stated was loose connect to a hose inside the assembly? if so, being loose wouldnt account for the problem...and the fuel filter bag, having a hole in it, would not account for any problem either, except not being a great filter- unless something got through and was clogged... not doubting there was an issue, would just like to find out what- before we get another assembly, id rather fix this one--did GTM have a definitive explanation, or just a "swap in out and see if it works"?
Thanks
TODD
Originally Posted by PORTUGEE
One built motor to go please.
Thread Starter
Joined: Mar 2004
Posts: 9,722
Likes: 2
From: phoenix, AZ
well we all knew the only thing that hasn't been replaced was the pump assembly.
we tried replacing the pump, FPR, and I've been through different (size) injectors and still had the issue.
Oh, Sam noticed that my fuel pressure gauge wasn't acting right.
Normally when you turn the key to the ON position, the gauge is supposed to turn all the way up, then drop to 30 or so psi and then very slowly drop after that. Mine didn't do that, it went all the way up, then all the way back down just as fast. He said that wasn't normal.
They didn't look at my pump assembly up to that point. The idea was to get an OEM one ASAP in the morning, pull the old one out to look at it, repair it if possible, but probably just switch to the new one anyway since that was the only piece of the puzzle not replaced. Bear in mind Dynocomp and GTM both thought something was up with my pump assembly.
After they had the old one out though, they noticed those things wrong with it and said that combined it might have been enough to make it not work as it should.
I dunno, but the new one works great. I'm partly wondering if there was some small difference between the new and old assembly because my Z is a build date of aug 2002 (same as Barzten1)
we tried replacing the pump, FPR, and I've been through different (size) injectors and still had the issue.
Oh, Sam noticed that my fuel pressure gauge wasn't acting right.
Normally when you turn the key to the ON position, the gauge is supposed to turn all the way up, then drop to 30 or so psi and then very slowly drop after that. Mine didn't do that, it went all the way up, then all the way back down just as fast. He said that wasn't normal.
They didn't look at my pump assembly up to that point. The idea was to get an OEM one ASAP in the morning, pull the old one out to look at it, repair it if possible, but probably just switch to the new one anyway since that was the only piece of the puzzle not replaced. Bear in mind Dynocomp and GTM both thought something was up with my pump assembly.
After they had the old one out though, they noticed those things wrong with it and said that combined it might have been enough to make it not work as it should.
I dunno, but the new one works great. I'm partly wondering if there was some small difference between the new and old assembly because my Z is a build date of aug 2002 (same as Barzten1)
Originally Posted by PORTUGEE
One built motor to go please.
i dont want to here your excuses, just blows my mind....
let me know about the built motor, we can whip one up in no time, then turn up the boost and you'll really have some fun
Originally Posted by sentry65
I'm partly wondering if there was some small difference between the new and old assembly because my Z is a build date of aug 2002 (same as Barzten1)
TODD
Originally Posted by 350zDCalb
blows my mind that u didnt buy my z, had a sleeved motor, twin turbo, utec, and was 6 or 7k less than what you paid...
i dont want to here your excuses, just blows my mind....
let me know about the built motor, we can whip one up in no time, then turn up the boost and you'll really have some fun
I offered to buy the motor.
Joel we all know your far from broke. You cant have that turbo kit and not build your motor. Id try to help but would probably more be in the way. And ughhh lets race before you get the new motor
Originally Posted by Barzten1
Joel we all know your far from broke. You cant have that turbo kit and not build your motor. Id try to help but would probably more be in the way. And ughhh lets race before you get the new motor
Mike sorry for the delay. it seems there is a lot of questioning of how can a super charged car make so much power, I think we all under estimate the vortech system ,and here in our shop we have been seeing alot of good result. This is not only on your car but other cars that had similart setups. We are currently finishing a car with the S-trim blower that will make well over 500whp with out a doubt, it's a g35 sedan 4 door with cats runing the F-Con and water/methanol injection, and 8.5 compression pistons. This car already made 447 whp at 9 psi and we were forced to stop because we were runing out of fuel ,so with the curent set up, bigger injectors and the 2.87 pully we should be able to get 500whp no problem, here is the graph for this one:
The next graph I want to share is your second dyno run in forth gear that we made before any thing was done to the car. The first run was made in third gear which i did not bother to print. Notice the spike at the end thats why the max power shows 425 it was only for 50 rpm:
The next graph is a over lay before and after the tune pretty self explaining:
The next graph represents a comparison between your car and the D Sport magazine car. Now the question is why is your car with no engine build, stock heads, 11psi vs 22psi doing so well againts a built car? In my opnion you have a lot of advantages over that car that allowed your car to do so well... (Dyno run .010 is D Sport Mag. Car and run .017 is Sentry)
You have a high compression engine,compression acts like boost, the more compression you have the beter torque you will have and it shows in the bottom end. But it also presents a poroblem with how much timing you can run, in your case having methanol injection gave you at least 2-3 degrees of timing that i ran, that i woud not run in super charged car that did not have W/M Injection. As we all know super chargers are noturious for high air intake temps. In your case since we hade a stand alone intake temp sensor in the intake manfold while data logging, your air intake temp will drop to 8 degress celsuis by the end of the run. if you have air intake temp that cold your going to make power,no if/ands or buts. The D Sport car did not have that advantage, I did look back on some logs while tuning the D Sport car and my AIT readings were average 28-30 degrees celcuis in the intake which are still not bad for a super charged car due to his massive intercooler.
Finaly both cars had the biggest advantage 32x32 resolution ems whitch makes a world of diffrence we were able in some cases to gain over 40whp just by install and tuning an F Con so it all makes sense for your car to do what it did and I still think 500 is not unreachable, I think we are going to have a lot of 500whp supercharged cars in the future
sam
GT Motorsports
The next graph I want to share is your second dyno run in forth gear that we made before any thing was done to the car. The first run was made in third gear which i did not bother to print. Notice the spike at the end thats why the max power shows 425 it was only for 50 rpm:
The next graph is a over lay before and after the tune pretty self explaining:
The next graph represents a comparison between your car and the D Sport magazine car. Now the question is why is your car with no engine build, stock heads, 11psi vs 22psi doing so well againts a built car? In my opnion you have a lot of advantages over that car that allowed your car to do so well... (Dyno run .010 is D Sport Mag. Car and run .017 is Sentry)
You have a high compression engine,compression acts like boost, the more compression you have the beter torque you will have and it shows in the bottom end. But it also presents a poroblem with how much timing you can run, in your case having methanol injection gave you at least 2-3 degrees of timing that i ran, that i woud not run in super charged car that did not have W/M Injection. As we all know super chargers are noturious for high air intake temps. In your case since we hade a stand alone intake temp sensor in the intake manfold while data logging, your air intake temp will drop to 8 degress celsuis by the end of the run. if you have air intake temp that cold your going to make power,no if/ands or buts. The D Sport car did not have that advantage, I did look back on some logs while tuning the D Sport car and my AIT readings were average 28-30 degrees celcuis in the intake which are still not bad for a super charged car due to his massive intercooler.
Finaly both cars had the biggest advantage 32x32 resolution ems whitch makes a world of diffrence we were able in some cases to gain over 40whp just by install and tuning an F Con so it all makes sense for your car to do what it did and I still think 500 is not unreachable, I think we are going to have a lot of 500whp supercharged cars in the future
sam
GT Motorsports
Last edited by Sam@GTM; Apr 24, 2007 at 02:32 AM.