42.5 lb/hr Injectors Maxing Out
#1
Senior Member
Thread Starter
42.5 lb/hr Injectors Maxing Out
Will my 42.5 lb/hr lucas injectors max out at 6500 rpm with my mods soon to come:
2.8 inch pulley
CAI
2.5 Catback
Short Tubed Header
Downpipe
High Flow Cat
2.8 inch pulley
CAI
2.5 Catback
Short Tubed Header
Downpipe
High Flow Cat
#2
Senior Member
your 42's will be fine.
I'm runing them with a rather extreme set up for such small injecters and i dont get above 94% duty cycle(when they go static) untill i'm above your clamed rpm limit of 6500.
i supose you might get close depending on your tune....but i dont think you'll be over.
I'm runing them with a rather extreme set up for such small injecters and i dont get above 94% duty cycle(when they go static) untill i'm above your clamed rpm limit of 6500.
i supose you might get close depending on your tune....but i dont think you'll be over.
#4
Senior Member
Thread Starter
Ok good, I heard in another thread yesterday that a 2.8 maxes 42.5 lb injectors out...I was like what!? Ok thanks. Yeah I'm going to be tuning it with my Maf Translator and monitering the a/f ratios with my aem wideband I just ordered today. Ordered about $900 in parts today lol. I'm broke, can't even put gas in my car lol. I have to walk to work today
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Originally Posted by memphisr24
How do you guys know what % the injectors are running at? What kind of gauge/tool do you use to read that information?
#11
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you can use the Interceptor. Find a converter online for injector pulsewidth to flow %.
MaxBoost, i think you are seeing max because you have the GM injectors. They are designed to flow the given rate at our high fuel rail pressure. I believe the regular lucas injectors are designed to flow for a lower fuel rail pressure so they flow more at our hgh pressure. Please correct me if I am wrong.
MaxBoost, i think you are seeing max because you have the GM injectors. They are designed to flow the given rate at our high fuel rail pressure. I believe the regular lucas injectors are designed to flow for a lower fuel rail pressure so they flow more at our hgh pressure. Please correct me if I am wrong.
#12
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Originally Posted by patathSS
you can use the Interceptor. Find a converter online for injector pulsewidth to flow %.
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Found it! http://www.stealth316.com/2-calc-idc.htm pretty simple, i think it is right
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Originally Posted by memphisr24
You rich *****.....lol jk. I wish I had that kind of money.
Originally Posted by patathSS
you can use the Interceptor. Find a converter online for injector pulsewidth to flow %.
MaxBoost, i think you are seeing max because you have the GM injectors. They are designed to flow the given rate at our high fuel rail pressure. I believe the regular lucas injectors are designed to flow for a lower fuel rail pressure so they flow more at our hgh pressure. Please correct me if I am wrong.
MaxBoost, i think you are seeing max because you have the GM injectors. They are designed to flow the given rate at our high fuel rail pressure. I believe the regular lucas injectors are designed to flow for a lower fuel rail pressure so they flow more at our hgh pressure. Please correct me if I am wrong.
Here is a screen shot of my log from last night.
#19
Senior Member
Originally Posted by CTCOBALTSSS
42.5s are just fine for that set up. I think 42.5s are good all the way to a 2.6" pulley. The next step would be 60lb. Only needed with a 2.5" pulley.
3.3" - 3" pulley -Stock Injectors
2.9"-2.6" pulley -42# Injectors
2.5" pulley -60# Injectors.
#20
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Originally Posted by patathSS
Man I love that IAT2 readout and how steady your timing is. My car sucks ass Your LTFT looks a little off.
Originally Posted by CTCOBALTSSS
42.5s are just fine for that set up. I think 42.5s are good all the way to a 2.6" pulley. The next step would be 60lb. Only needed with a 2.5" pulley.
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Originally Posted by 06blackg85ss
Damn with my 42.'s and my 2.7 I'm only getting 51% duty cycle at 7411 rpm in 2nd gear.
haven't gotten enough room to do a run in third yet.
haven't gotten enough room to do a run in third yet.
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Originally Posted by 06blackg85ss
I'm def heading to the dyno this week.... I'm still running my stock exhaust so it shouldn't be too bad... damnit, here comes the 60's...
#25
Senior Member
pat and jason have give some good information sence I gave the first and totaly correct answer
had to take a stab at ya guys....
now to who ever started this thred....
with your set up you will be fine!...
i'm run my car HARD every day, and shes holdin up just fine!
also guys you cant forget that injecters go static below 1005 duty cycle...its around 94-96% so with jason at 100% there...and a few of my logs showing 115%-120%....but i've never had any engine problums!!!
I've broke everyhting else except that!!!
the only thing that you might want to be slighly werry of is staying at WOT for long periods of time. as long as you/me do that the smaller injecters will be just fine!
(for the time being)
had to take a stab at ya guys....
now to who ever started this thred....
with your set up you will be fine!...
i'm run my car HARD every day, and shes holdin up just fine!
also guys you cant forget that injecters go static below 1005 duty cycle...its around 94-96% so with jason at 100% there...and a few of my logs showing 115%-120%....but i've never had any engine problums!!!
I've broke everyhting else except that!!!
the only thing that you might want to be slighly werry of is staying at WOT for long periods of time. as long as you/me do that the smaller injecters will be just fine!
(for the time being)