dyno'd the ole FD today!
07-13-03, 09:09 PM
#1
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dyno'd the ole FD today!
I have been having problems with the secondary turbo ever since I bought this car. I finally got some issues resolved, and dyno'd the carj. for some reason it would not register torque, so you will have to go with HP only.
I dyno'd at 296rwhp!
mods are
DP,MP, intake, pettit unlimited computer, STOCK catback, STOCK intercooler, STOCK injectors.
the runs were at 14lbs
air fuel ratio was under 10:1 verified by a wideband
Ive seen posts on here that the stock fuel system isnt adequate for high amts of boost. why am I running 10:1 at 14lbs?
I dyno'd at 296rwhp!
mods are
DP,MP, intake, pettit unlimited computer, STOCK catback, STOCK intercooler, STOCK injectors.
the runs were at 14lbs
air fuel ratio was under 10:1 verified by a wideband
Ive seen posts on here that the stock fuel system isnt adequate for high amts of boost. why am I running 10:1 at 14lbs?
07-13-03, 09:19 PM
#2
Re: dyno'd the ole FD today!
Originally posted by oakridgerx7
Ive seen posts on here that the stock fuel system isnt adequate for high amts of boost. why am I running 10:1 at 14lbs?
Ive seen posts on here that the stock fuel system isnt adequate for high amts of boost. why am I running 10:1 at 14lbs?
Your problem is the stock IC running 14 PSI.
07-13-03, 09:45 PM
#3
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Re: dyno'd the ole FD today!
Originally posted by oakridgerx7
Ive seen posts on here that the stock fuel system isnt adequate for high amts of boost. why am I running 10:1 at 14lbs?
Ive seen posts on here that the stock fuel system isnt adequate for high amts of boost. why am I running 10:1 at 14lbs?
Also, as Mahjik pointed out, with the stock IC, you are working your turbos WAY too hard and you will have extremely high intake air temps.
Personally, I wouldn't run over 10 psi with the stock IC.
07-14-03, 06:54 AM
#4
Eats, Sleeps, Dreams Rotary
get some 1300 cc inj if you want to run over 12psi. Even with my old setup which is similar to yours now, i was seeing 9x% inj duty cycles....i didnt like that so i upgraded to the 1300cc.
07-14-03, 07:26 AM
#5
Originally posted by matty
get some 1300 cc inj if you want to run over 12psi. Even with my old setup which is similar to yours now, i was seeing 9x% inj duty cycles....i didnt like that so i upgraded to the 1300cc.
get some 1300 cc inj if you want to run over 12psi. Even with my old setup which is similar to yours now, i was seeing 9x% inj duty cycles....i didnt like that so i upgraded to the 1300cc.
07-14-03, 07:55 AM
#7
Original Gangster/Rotary!
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Re: dyno'd the ole FD today!
Originally posted by oakridgerx7
I have been having problems with the secondary turbo ever since I bought this car. I finally got some issues resolved, and dyno'd the carj. for some reason it would not register torque, so you will have to go with HP only.
I dyno'd at 296rwhp!
mods are
DP,MP, intake, pettit unlimited computer, STOCK catback, STOCK intercooler, STOCK injectors.
the runs were at 14lbs
air fuel ratio was under 10:1 verified by a wideband
Ive seen posts on here that the stock fuel system isnt adequate for high amts of boost. why am I running 10:1 at 14lbs?
I have been having problems with the secondary turbo ever since I bought this car. I finally got some issues resolved, and dyno'd the carj. for some reason it would not register torque, so you will have to go with HP only.
I dyno'd at 296rwhp!
mods are
DP,MP, intake, pettit unlimited computer, STOCK catback, STOCK intercooler, STOCK injectors.
the runs were at 14lbs
air fuel ratio was under 10:1 verified by a wideband
Ive seen posts on here that the stock fuel system isnt adequate for high amts of boost. why am I running 10:1 at 14lbs?
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07-14-03, 08:13 AM
#8
Originally posted by matty
i did.
i did.
I think people get a little too paranoid about injector duty cycles sometimes.
07-14-03, 08:16 AM
#9
Eats, Sleeps, Dreams Rotary
Originally posted by Mahjik
Having high injector duty cycles isn't necessarily a bad thing. It just means there isn't any room to grow. The A/F ratio is more important. As long what you have will provide the proper A/F ratio for what your car is running, there really isn't a need to upgrade.
I think people get a little too paranoid about injector duty cycles sometimes.
Having high injector duty cycles isn't necessarily a bad thing. It just means there isn't any room to grow. The A/F ratio is more important. As long what you have will provide the proper A/F ratio for what your car is running, there really isn't a need to upgrade.
I think people get a little too paranoid about injector duty cycles sometimes.
07-14-03, 08:21 AM
#10
Originally posted by matty
hear ya...but with an 11.2 afr i was seeing high 90s....that makes me nervous. and it should....where is my margin for error? ya know?
hear ya...but with an 11.2 afr i was seeing high 90s....that makes me nervous. and it should....where is my margin for error? ya know?
07-14-03, 08:25 AM
#11
Eats, Sleeps, Dreams Rotary
Originally posted by Mahjik
Sounds more like improper tuning. However, if your happy, that's fine. I'm just pointing out that there have been people for years that have run 14-15 PSI on re-programmed stock ECU's (so no upgraded injectors) without any problems.
Sounds more like improper tuning. However, if your happy, that's fine. I'm just pointing out that there have been people for years that have run 14-15 PSI on re-programmed stock ECU's (so no upgraded injectors) without any problems.
Whatever...i am just pointing out my experiences,,which dictate that with an 11.2 afr @ 12psi...i was seeing inj duty cycles that made me uncomfortable.
07-14-03, 08:31 AM
#12
Originally posted by matty
there also has been yrs of people blowing up FDs. I think the power fc has added some reliability and there is much more understanding outthere nowadays. Maybe people were running 100% duty cylces back then but didnt have a way to monitor them.
Whatever...i am just pointing out my experiences,,which dictate that with an 11.2 afr @ 12psi...i was seeing inj duty cycles that made me uncomfortable.
there also has been yrs of people blowing up FDs. I think the power fc has added some reliability and there is much more understanding outthere nowadays. Maybe people were running 100% duty cylces back then but didnt have a way to monitor them.
Whatever...i am just pointing out my experiences,,which dictate that with an 11.2 afr @ 12psi...i was seeing inj duty cycles that made me uncomfortable.
07-14-03, 08:35 AM
#13
A good message from last year:
Originally posted by Wade
Rikki,
"Safely" is a relative term, safety doesn't have as much to do with the duty cycle of your injectors as it does everything else like charge temp, a:f ratio, timing. PFS is right on this one, think of PFS whatever you want (good or bad, I couldn't care less) but an FD can certainly make 400 rwhp with the stock injectors, it has been done.
I'm not sure why so many people freak out about hitting high duty cycles with stock injectors. Here are some things to consider:
1) I don't know anyone who has had an injector failure from driving the stock ones at high duty cycles, and a lot of people have done this for YEARS
2) I DO know several people who had enlarged injectors fail
3) There is no reason why an injector should fail just because it is staying open instead of clicking on and off several times per second... someone explain to me their reasoning on this!
4) It is the fuel injection companies that are telling you that beyond 85% duty is a bad thing, big surprise
5) I think beyond 85% *IS* a bad thing in a sense because it leaves no more room for mods if your a:f is exactly where you want it, you could lose tuning flexibility... but I wouldn't freak out about thinking my engine would blow because my duty cycles are high
6) High duty cycles only occur right near redline anyway, we're talking about a second or two when raking through the gears unless you are going for a top speed run at Bonneville
My conclusion is there is no need to upgrade injectors until there is a NEED to upgrade injectors. I run 15psi of boost with stock injectors and pressure and have been hitting 100% duty for almost 4 years now. If one of my injectors fails I'll know it and I highly doubt I'll blow my engine because of it.
Wade
Rikki,
"Safely" is a relative term, safety doesn't have as much to do with the duty cycle of your injectors as it does everything else like charge temp, a:f ratio, timing. PFS is right on this one, think of PFS whatever you want (good or bad, I couldn't care less) but an FD can certainly make 400 rwhp with the stock injectors, it has been done.
I'm not sure why so many people freak out about hitting high duty cycles with stock injectors. Here are some things to consider:
1) I don't know anyone who has had an injector failure from driving the stock ones at high duty cycles, and a lot of people have done this for YEARS
2) I DO know several people who had enlarged injectors fail
3) There is no reason why an injector should fail just because it is staying open instead of clicking on and off several times per second... someone explain to me their reasoning on this!
4) It is the fuel injection companies that are telling you that beyond 85% duty is a bad thing, big surprise
5) I think beyond 85% *IS* a bad thing in a sense because it leaves no more room for mods if your a:f is exactly where you want it, you could lose tuning flexibility... but I wouldn't freak out about thinking my engine would blow because my duty cycles are high
6) High duty cycles only occur right near redline anyway, we're talking about a second or two when raking through the gears unless you are going for a top speed run at Bonneville
My conclusion is there is no need to upgrade injectors until there is a NEED to upgrade injectors. I run 15psi of boost with stock injectors and pressure and have been hitting 100% duty for almost 4 years now. If one of my injectors fails I'll know it and I highly doubt I'll blow my engine because of it.
Wade
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