42 Or 60lbs Injectors
Originally Posted by LSs1Power
I doubt it... Im running 60lbs injectors with 60-61psi of fuel pressure and seeing around 75% DC at 550rwhp. That is around 650 FWHP and im at 75% Duty Cycle. From what im seeing with the 60lbs i think they are good up to 650rwhp on a SC'd LS1 or 750rwhp on a Turbo running 60psi of FP and over 100% DC.
The reason Mightey Mouse got away with 60#ers is he was running 80psi of fiel pressure. 60 psi base FP and a 20 psi rise with a boost ref. FP reg. The Meth injection helped also...... and it does go farther on a turbo..... and if you read Motrons site the Motron 60# inlector will flow up to 83#s with enough fuel pressure..... ill find the link
Kyle
Here ya go....
Coming right off there site.....
The injector flows 60 lbs/hr at 3 BAR (43.5 PSI); and up to 85 lbs/hr at 87 PSI!
Comes with High Performance O-rings and inlet filter installed. Impedance - 12.5 Ohm / Flow 6.9-10.7 g/S @ 250-600 kPa
Kyle
Coming right off there site.....
The injector flows 60 lbs/hr at 3 BAR (43.5 PSI); and up to 85 lbs/hr at 87 PSI!
Comes with High Performance O-rings and inlet filter installed. Impedance - 12.5 Ohm / Flow 6.9-10.7 g/S @ 250-600 kPa
Kyle
Originally Posted by Boostaholic
This sounds a little off to me, seems like you should have been closer to 65% duty cycle.
its no debate, the mtrons are better all-around.. if ya had enough fuel pump i bet they could do maybe 1100 horse at the motor... would probably take twin 340lph's to flow against 90+ rail psi
42's So on 42's with higher fuel pressure how many # can they push out. I pushed out 617rwhp on a mustang dyno with 42's and meth at 11.1 afr. I need to upgrade to 60's but have yet to do so.
Originally Posted by MIGHTYMOUSE
its no debate, the mtrons are better all-around.. if ya had enough fuel pump i bet they could do maybe 1100 horse at the motor... would probably take twin 340lph's to flow against 90+ rail psi
Thread Starter
Joined: Dec 2004
Posts: 699
Likes: 1
From: Redondo Beach, California
60's so if i go with the 60's what other mods to my fuel system do i need? and what are the limits on the 42lb. is tuning on the 60's more difficult?
On The Tree
Joined: Nov 2004
Posts: 143
Likes: 0
From: Macomb Township, MI
OK I hate to bring up a semi-old thread but I'm at my wits end and you guys are my last hope 
I've got a 100% stock GTO with a ProCharger on it pushing 9PSI. The injectors that come with the procharger kit are 38lbs (L67 3800) and I'm currently at 23ms or about 115% duty cycle on them at 6000 RPM, not good. Anyhow I have a set of flowmatched 60lbs Mototrons that I tried to tune in today and I'll be damned if I didnt rip my hair out. With the 38's in the LT's between banks are within 1% typically or dead even (pretty nice eh?) with the motortrons in at idle, the PCM is ADDING fuel no matter how I scale the IFR, and the bank to bank LT's can be as much as 6% off. Even stranger I had one bank (B1) hang itself at 880mv at idle as soon as the fan turns on or some other load is applied to the engine, the O2 swings again. Any input? I'm at my wits end here I thought for sure this would be an easy swap, to that end is there a competant tuner in SE Michigan that could help me out with this? Any input is GREATLY appreciated!
I've got a 100% stock GTO with a ProCharger on it pushing 9PSI. The injectors that come with the procharger kit are 38lbs (L67 3800) and I'm currently at 23ms or about 115% duty cycle on them at 6000 RPM, not good. Anyhow I have a set of flowmatched 60lbs Mototrons that I tried to tune in today and I'll be damned if I didnt rip my hair out. With the 38's in the LT's between banks are within 1% typically or dead even (pretty nice eh?) with the motortrons in at idle, the PCM is ADDING fuel no matter how I scale the IFR, and the bank to bank LT's can be as much as 6% off. Even stranger I had one bank (B1) hang itself at 880mv at idle as soon as the fan turns on or some other load is applied to the engine, the O2 swings again. Any input? I'm at my wits end here I thought for sure this would be an easy swap, to that end is there a competant tuner in SE Michigan that could help me out with this? Any input is GREATLY appreciated! LS1 Tech Stories
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