Who has tuned with 57#
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From: Houston TX (Chicago/Evanston IL)
Who has tuned with 57# I need to know how I can find information on tuning with racetronix 57# an hour injectors? Junk LS1 computers, Even mustangs don't have this problem....
Re: Who has tuned with 57# havent heard of 57's but i warn you of 'ported' high impedance injectors.. they are hardly linear and that can give you some pretty interesting part throttle tuning efforts. these were a became somewhat popular maybe 5 years ago for racing where the above isn't necessary.
myself i have a set of 60# injectors that i havent had the chance to fool with.. they unfortunately may go out the window now that dfi is on the way.. so i will not be able to say how tuneable they are before their release.
myself i have a set of 60# injectors that i havent had the chance to fool with.. they unfortunately may go out the window now that dfi is on the way.. so i will not be able to say how tuneable they are before their release.
Joined: Mar 2002
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From: A Racetronix dealer near you...
Re: Who has tuned with 57#
havent heard of 57's but i warn you of 'ported' high impedance injectors...
Since some people are having trouble tuning the LS1 PCM for these injectors we have started to look into the reasons. Most Racetronix dealers are having good success and others not. These injectors work very well in all other vehicle platforms such as Fords, Buicks, Sy /Ty and many imports. Why it is such a problem in the LS1 is curious as the 3172 is a very linear injector with no odd electromagnetic characteristics such as the Delphi/RP injectors. This might not be a tuning / electrical issue at all but rather something to do with the motor combo / intake configuration / spray pattern. Either way we will try to get to the bottom of this as soon as possible.
Jack
Racetronix
__________________
Manufacturer / Distributor of Automotive Fuel Systems, Components & Electronics
Please support a Racetronix dealer near you for personalized service.
>WEB SITE<
Manufacturer / Distributor of Automotive Fuel Systems, Components & Electronics
Please support a Racetronix dealer near you for personalized service.
>WEB SITE<
TECH Senior Member
Joined: Nov 2001
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From: Chi-Town, IL
Re: Who has tuned with 57# I was going to try the 57's in my car, but my 42.5's are lasting, and the next move I will make will be to go with a FAST system and 83's....and a bigger head unit...
Re: Who has tuned with 57# blackls1ta and htmm have them on there cars.
I have some sitting in a box still wanting to get them on..
tell us about your set up, what turbo kit do you have?
I have some sitting in a box still wanting to get them on..
tell us about your set up, what turbo kit do you have?
Re: Who has tuned with 57# thanks for the response racetronix. it was just an oddball flow rating that i hadn't heard before and know the ported ones are very difficult to work with on a street car. no accusal 
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Re: Who has tuned with 57# i have them now, and it was very interesting what i found on the dyno.
i had 43 lbs /hr (svo greentops) in and my a/f was ok slightly going to the lean side at high rpm , but nothing to lean.
after i swapped the injectors to the seimens 57 lbs hr injectors i just scaled my PE table accordingly ( it was a straight line theat rises up at the end before i scaled it, kinda like an exponential line but from the other side).
the surprise came from the a/f readings on the dyno. my A/f would start at 13:1 drop to well below 10:1 ( a/f meter on the dyno jet only goes as low as 10:1) then comes back up to about 13:1 at about 4500 rpm then dips back under 10:1 at 5500 only to come up to 12.7 :1 in the end.
i just find it kinda weird that the PE table had to be modified so much to get the A/F straigt. i'm not saying that these are bad injectors, on the contrary they where easy to adjust and responded very nicely to PE changes. i guess if you put them in , it's best to check your A/F on a dyno just to make sure.
i had 43 lbs /hr (svo greentops) in and my a/f was ok slightly going to the lean side at high rpm , but nothing to lean.
after i swapped the injectors to the seimens 57 lbs hr injectors i just scaled my PE table accordingly ( it was a straight line theat rises up at the end before i scaled it, kinda like an exponential line but from the other side).
the surprise came from the a/f readings on the dyno. my A/f would start at 13:1 drop to well below 10:1 ( a/f meter on the dyno jet only goes as low as 10:1) then comes back up to about 13:1 at about 4500 rpm then dips back under 10:1 at 5500 only to come up to 12.7 :1 in the end.
i just find it kinda weird that the PE table had to be modified so much to get the A/F straigt. i'm not saying that these are bad injectors, on the contrary they where easy to adjust and responded very nicely to PE changes. i guess if you put them in , it's best to check your A/F on a dyno just to make sure.
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Verdad Gallardo Joined: Mar 2002
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From: A Racetronix dealer near you...
Re: Who has tuned with 57# Most people are complaining about idle not WOT operation. How do you find the idle and drivability?
This Siemens injector tends to produce more power and lower EGT's at the same given A/F when the pencil stream is projected at the base of the intake valve as compared to other types of injectors. The Bosch SVO 42 injector produces a wide spray pattern which wets the intake tract etc. Perhaps it is this characteristic that allows the Siemens injector to perform so well on cars where the injector is pointed directly at the intake valve? When the fuel hits the hot base of the intake valve it bursts into a vapor which gets sucked into the cylinder which in turn produces a very good burn. The only catch is that if you are running a cam / intake combo which produces a very low manifold signal at idle the tune-up might be more difficult. Seeing as the LS1 intake tends to produce very high air velocities one would not expect this to be a problem. The LS1 PCM is fully sequential as well which also helps injector vs. intake valve timing. Is there an adjustment in the advanced version of LS1 Edit that allows for adjustment of the injector timing vs.CAM position?
Jack
Racetronix
This Siemens injector tends to produce more power and lower EGT's at the same given A/F when the pencil stream is projected at the base of the intake valve as compared to other types of injectors. The Bosch SVO 42 injector produces a wide spray pattern which wets the intake tract etc. Perhaps it is this characteristic that allows the Siemens injector to perform so well on cars where the injector is pointed directly at the intake valve? When the fuel hits the hot base of the intake valve it bursts into a vapor which gets sucked into the cylinder which in turn produces a very good burn. The only catch is that if you are running a cam / intake combo which produces a very low manifold signal at idle the tune-up might be more difficult. Seeing as the LS1 intake tends to produce very high air velocities one would not expect this to be a problem. The LS1 PCM is fully sequential as well which also helps injector vs. intake valve timing. Is there an adjustment in the advanced version of LS1 Edit that allows for adjustment of the injector timing vs.CAM position?
Jack
Racetronix
__________________
Manufacturer / Distributor of Automotive Fuel Systems, Components & Electronics
Please support a Racetronix dealer near you for personalized service.
>WEB SITE<
Manufacturer / Distributor of Automotive Fuel Systems, Components & Electronics
Please support a Racetronix dealer near you for personalized service.
>WEB SITE<
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From: Deep in the seedy underworld of Koonerville
Re: Who has tuned with 57#
Most people are complaining about idle not WOT operation. How do you find the idle and drivability?
This Siemens injector tends to produce more power and lower EGT's at the same given A/F when the pencil stream is projected at the base of the intake valve as compared to other types of injectors. The Bosch SVO 42 injector produces a wide spray pattern which wets the intake tract etc. Perhaps it is this characteristic that allows the Siemens injector to perform so well on cars where the injector is pointed directly at the intake valve? When the fuel hits the hot base of the intake valve it bursts into a vapor which gets sucked into the cylinder which in turn produces a very good burn. The only catch is that if you are running a cam / intake combo which produces a very low manifold signal at idle the tune-up might be more difficult. Seeing as the LS1 intake tends to produce very high air velocities one would not expect this to be a problem. The LS1 PCM is fully sequential as well which also helps injector vs. intake valve timing. Is there an adjustment in the advanced version of LS1 Edit that allows for adjustment of the injector timing vs.CAM position?
Jack
Racetronix
This Siemens injector tends to produce more power and lower EGT's at the same given A/F when the pencil stream is projected at the base of the intake valve as compared to other types of injectors. The Bosch SVO 42 injector produces a wide spray pattern which wets the intake tract etc. Perhaps it is this characteristic that allows the Siemens injector to perform so well on cars where the injector is pointed directly at the intake valve? When the fuel hits the hot base of the intake valve it bursts into a vapor which gets sucked into the cylinder which in turn produces a very good burn. The only catch is that if you are running a cam / intake combo which produces a very low manifold signal at idle the tune-up might be more difficult. Seeing as the LS1 intake tends to produce very high air velocities one would not expect this to be a problem. The LS1 PCM is fully sequential as well which also helps injector vs. intake valve timing. Is there an adjustment in the advanced version of LS1 Edit that allows for adjustment of the injector timing vs.CAM position?
Jack
Racetronix
I did notice the crazy dip into the 10:1 A/F ratio between ~4000-5500rpm range when I first got them in and got my fuel regulator fixed(missing o-ring). This tuned out with PE changes though. Very strange that it did that though.
Jack, the only injector timing controls in LS1 Edit are based on Voltage vs. MAP. Maybe in future updates something like injector timing vs. CAM position will be available in LS1 Edit but, if it wasn't in the original coding then it won't.
Truck pumps done? :p
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Joined: Nov 2001
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From: Raleigh, NC
Re: Who has tuned with 57# I DO like the 55's (er, 57's ? ).
Just a couple wierd things with me... I have to lower the IFR table, IAW a lot smaller injector than 55 lbs., to get zero'd LTFT's.
The second thing is, the IPW jumps around quite a bit at low cruise and idle ranges. That also seems to affect consistent LTFT numbers. The dynamic range of my LTFT's is wider than it was with 42# injectors.
That being said, when it comes to WOT, the injectors produce. Even though I have two GSS Walbro 340's in my tank (a GREAT help), I still get enough of a FP drop that I am concerned. That also makes WOT tuning a bit trickier.
I need a better rail, I think, larger lines, and more juice (current) to the pumps.
Jack, I emailed you several times about getting the wiring for the dual pumps. Are you still gonna sell it to me? Thanks, man.
Just a couple wierd things with me... I have to lower the IFR table, IAW a lot smaller injector than 55 lbs., to get zero'd LTFT's.
The second thing is, the IPW jumps around quite a bit at low cruise and idle ranges. That also seems to affect consistent LTFT numbers. The dynamic range of my LTFT's is wider than it was with 42# injectors.
That being said, when it comes to WOT, the injectors produce. Even though I have two GSS Walbro 340's in my tank (a GREAT help), I still get enough of a FP drop that I am concerned. That also makes WOT tuning a bit trickier.
I need a better rail, I think, larger lines, and more juice (current) to the pumps.
Jack, I emailed you several times about getting the wiring for the dual pumps. Are you still gonna sell it to me? Thanks, man.