Dyno Results
Originally Posted by David Hayes
okay, i see. jason, you've dynoed a bunch of cars. what should he making regarding RWHP?
Jason
Originally Posted by David Hayes
isn't this still a problem jason? if he doesn't have a trace of the dyno run above 6,000 RPMs, he still doesn't have a complete picture of what his car can do does he?
regarding putting in the starting and ending MPH, this is still the same point. if the ending MPH was set too low and the run ended then he still doesn't have a complete idea of how his car performs (ie up to 7,500 RPMs). so, he could be making more HP and not know it.
jason, you run a mustang dyno right? what would you suggest that he do? do you feel he has an accurate picture of his car's performance from the dyno posted?
regarding putting in the starting and ending MPH, this is still the same point. if the ending MPH was set too low and the run ended then he still doesn't have a complete idea of how his car performs (ie up to 7,500 RPMs). so, he could be making more HP and not know it.
jason, you run a mustang dyno right? what would you suggest that he do? do you feel he has an accurate picture of his car's performance from the dyno posted?
A stock twins/stock motor car will usually make peak power around 6500rpm. If the motor is ported and running a single turbo the powerband will move up past 7000RPM.
Looking at his graph the HP flattens around 5800RPM which is low, but that is where the A/F goes pig rich. I know he mentioned there was an issue with the wideband, but I would guess it goes very rich up there. I havent seen the timing so that could also being playing a part.
Jason
Originally Posted by Jason
I just went back to my dyno and looked at some old trace graphs. I noticed that the RPM does cut off as soon as the run is done, so it does look like they only went to 6000 RPM.
A stock twins/stock motor car will usually make peak power around 6500rpm. If the motor is ported and running a single turbo the powerband will move up past 7000RPM.
Looking at his graph the HP flattens around 5800RPM which is low, but that is where the A/F goes pig rich. I know he mentioned there was an issue with the wideband, but I would guess it goes very rich up there. I havent seen the timing so that could also being playing a part.
Jason
A stock twins/stock motor car will usually make peak power around 6500rpm. If the motor is ported and running a single turbo the powerband will move up past 7000RPM.
Looking at his graph the HP flattens around 5800RPM which is low, but that is where the A/F goes pig rich. I know he mentioned there was an issue with the wideband, but I would guess it goes very rich up there. I havent seen the timing so that could also being playing a part.
Jason
Thread Starter
Fanno
Joined: Jul 2004
Posts: 618
Likes: 0
From: Pittsburgh
Thanks guys, i appreciate your imput. I am installing a Y-Pipe right now, and im gonna get some bigger injectors. Then im gonna bring it back to this dyno, and tell him to run the RPMs a bit higher. Is that my best bet?
There are varying opinions on whether adding injectors or increasing injector size is necessary, considering your target horsepower. In addition adding or changing injectors may require more tuning of your AFRs across the board. I have attached a log from a dyno run which resulted in 311 rwhp. The mods on the car are the same as yours with the exception of a Twin Power. Taking into consideration that no 2 cars are alike, you’ll be able to examine AFRs, injectors duty cycles and boost at various rpms.
Personally I like my AFRs a little lower than what yours are in the middle of your dyno graph.
Personally I like my AFRs a little lower than what yours are in the middle of your dyno graph.
Last edited by books; Oct 24, 2007 at 03:52 PM.
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