I don't do this for a living so you probably know more about this than I do. With smoothing at 0 I have seen some jaggedness but not to this extent.tmcphail said:
Steve
DynoJet results: Accufab 'X' pipe & SCT Tuner
- Thread starter 632C2
- Start date
Steve
tmcphail
GT Owner/Vendor
email me the run files [email protected]
You have also got to understand the variables involved with the amount of components that reside between the flywheel and the actual dyno drum.
You have also got to understand the variables involved with the amount of components that reside between the flywheel and the actual dyno drum.
632C2 said:
I am not interested in trading insults. Evidently I have led a protected dyno life.tmcphail said:
Steve
tmcphail
GT Owner/Vendor
Also once you start to get the timing and fuel curves where they need to be the graph tends to smooth out on its own. Although at 0 its always going to be there to some extent.
__________________
Mr. Torrie R. McPhail
2005 Black Twin Turbo Ford GT 924rwhp / 787rwtq
2005 Silver Viper 610 rwhp / 760 rwtq
2006 Silver Jeep SRT-8 [email protected]
__________________
Mr. Torrie R. McPhail
2005 Black Twin Turbo Ford GT 924rwhp / 787rwtq
2005 Silver Viper 610 rwhp / 760 rwtq
2006 Silver Jeep SRT-8 [email protected]
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tmcphail
GT Owner/Vendor
Excuse me ? Where was I insulting you here ? I am sorry for attempting to offer you help by wanting to view the graphs here in front of me and making comparisons against my own car. I apologize for stating facts and you getting offended. I will move on have a great evening.
__________________
Mr. Torrie R. McPhail
2005 Black Twin Turbo Ford GT 924rwhp / 787rwtq
2005 Silver Viper 610 rwhp / 760 rwtq
2006 Silver Jeep SRT-8 [email protected]
__________________
Mr. Torrie R. McPhail
2005 Black Twin Turbo Ford GT 924rwhp / 787rwtq
2005 Silver Viper 610 rwhp / 760 rwtq
2006 Silver Jeep SRT-8 [email protected]
632C2 said:
Thank you. That is the kind of info I was looking for. As I said, I have had no experience with supercharging and the turbo's I have done have not exhibited that.tmcphail said:
Steve
Evidently I misunderstood how you responded and for that I apologize. Have a great evening as well.tmcphail said:
Steve
tmcphail
GT Owner/Vendor
Understood.
__________________
Mr. Torrie R. McPhail
2005 Black Twin Turbo Ford GT 924rwhp / 787rwtq
2005 Silver Viper 610 rwhp / 760 rwtq
2006 Silver Jeep SRT-8 [email protected]
__________________
Mr. Torrie R. McPhail
2005 Black Twin Turbo Ford GT 924rwhp / 787rwtq
2005 Silver Viper 610 rwhp / 760 rwtq
2006 Silver Jeep SRT-8 [email protected]
analogdesigner
GT Owner
Good data due to good consistancy!
Steve,
Excellent data taking! Consistancy among runs is the single most important thing, especially on the GT. On the GT it's interesting using the recommended SAE Smoothing value of 5 as well as 0, since it's interesting to see those fine little gliches in the response.
That downward HP glitch around 6,300 RPM has always bothered me The motor is overly rich at that point and it seems that either an aftermarket exhaust or a "tune" can clean this up fairly well. Is there an acoustical resonance in the stock GT exhaust system that creates this, resulting in this overly rich glitch at 6,300?
Jay
http://www.fordgtforum.com/forums/forumdisplay.php?f=34
Steve,
Excellent data taking! Consistancy among runs is the single most important thing, especially on the GT. On the GT it's interesting using the recommended SAE Smoothing value of 5 as well as 0, since it's interesting to see those fine little gliches in the response.
That downward HP glitch around 6,300 RPM has always bothered me The motor is overly rich at that point and it seems that either an aftermarket exhaust or a "tune" can clean this up fairly well. Is there an acoustical resonance in the stock GT exhaust system that creates this, resulting in this overly rich glitch at 6,300?
Jay
http://www.fordgtforum.com/forums/forumdisplay.php?f=34
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tmcphail
GT Owner/Vendor
The stock calibration is insanely rich with a very conservative timing curve. You really need further data to attempt to guess what occured on DRF 2 above 6250rpm to rule out all possible events.
Plug gap comes into play once you increase cylinder pressure at hi rpm as well.
__________________
Mr. Torrie R. McPhail
2005 Black Twin Turbo Ford GT 924rwhp / 787rwtq
2005 Silver Viper 610 rwhp / 760 rwtq
2006 Silver Jeep SRT-8 [email protected]
Plug gap comes into play once you increase cylinder pressure at hi rpm as well.
__________________
Mr. Torrie R. McPhail
2005 Black Twin Turbo Ford GT 924rwhp / 787rwtq
2005 Silver Viper 610 rwhp / 760 rwtq
2006 Silver Jeep SRT-8 [email protected]
tmcphail
GT Owner/Vendor
Thanks, Jay. Consistancy is exactly what I strive for. I make use of the smoothing values when I am comparing runs with different combinations. Great question about the stock GT exhaust system. Even with the stock tune and 'X' pipe, the A/F will still extremely rich.analogdesigner said:
Torrie summed it up nicely.
Steve
SCT Tune
The Stock Ford Tune has a "CAT PROTECTION" feature that RICHES UP the A/F at higr RPM's. You need to change this, to get the A/F correct at high RPM/s.
AMb
The Stock Ford Tune has a "CAT PROTECTION" feature that RICHES UP the A/F at higr RPM's. You need to change this, to get the A/F correct at high RPM/s.
AMb
BlackICE
GT Owner
AMB said:
What is cat protection? Are you saying that if you have the correct a/f ratio at WOT that the exhaust gas temps would be to high and it would burn out the cats?
BlackICE
tmcphail
GT Owner/Vendor
Its an absolute fact and built into most all Ford Gas calibrations. I would bet the accufab tune had this disabled.
Mr. Torrie R. McPhail
2005 Black Twin Turbo Ford GT 924rwhp / 787rwtq
2005 Silver Viper 610 rwhp / 760 rwtq
2006 Silver Jeep SRT-8 [email protected]
Mr. Torrie R. McPhail
2005 Black Twin Turbo Ford GT 924rwhp / 787rwtq
2005 Silver Viper 610 rwhp / 760 rwtq
2006 Silver Jeep SRT-8 [email protected]
632C2 said:
+2 on the rich AFR at high rpm for CAT protection. They do it on the SC'd 03 and 04 Cobras, as well.
My dyno curves do have some wiggles with smoothing at zero as well, although not as great as yours shows. I can send you my files, if you like (since I don't have permission to post pictures here).
Can you also send me your run files? I'll PM you my e-mail address. Thanks. Great info.
My dyno curves do have some wiggles with smoothing at zero as well, although not as great as yours shows. I can send you my files, if you like (since I don't have permission to post pictures here).
Can you also send me your run files? I'll PM you my e-mail address. Thanks. Great info.
I made a few runs today and the results were much better. I had a conversation with Tony @ HP Performance and he suggested I close up my plug gap to .030". His advice was perfect. The runs are now MUCH smoother at the smoothing factor of 0 and the overall horsepower and torque are up as well. Tony also sold me the SCT Racer package for further modifications. It's all good.Black2003Cobra said:
Steve
tmcphail
GT Owner/Vendor
If you look back at post #30 I brought up the plug gap issue on 10-23. I know a little bit about these cars and I am sure Tony reinforced that fact to you on the phone. He and I are competitors in the Ford tuning world but above that are very good friends first and foremost and we both share information back in forth.
Mr. Torrie R. McPhail
2005 Black Twin Turbo Ford GT 1046rwhp / 892rwtq
2005 Silver Viper 610 rwhp / 760 rwtq
2006 Silver Jeep SRT-8 [email protected]
Mr. Torrie R. McPhail
2005 Black Twin Turbo Ford GT 1046rwhp / 892rwtq
2005 Silver Viper 610 rwhp / 760 rwtq
2006 Silver Jeep SRT-8 [email protected]
632C2 said:
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