Need injector recommendation
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Joined: Sep 2003
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Need injector recommendation I have data logged 95% duty cycle on my injectors while tuning the other day and I need to upgrade to a bigger injector. Anyone have a specific injector brand and size I should go to?
Is there an issue with using too big an injector? I will eventually go to a resleeved/ or LS7 block stroker so can I use 42 lbers now?
Are the racetronix injectors a good bet 42lbers?
Engine:
LS2
heads
cam
FAST 90
headers
UD pulley
Air box
Is there an issue with using too big an injector? I will eventually go to a resleeved/ or LS7 block stroker so can I use 42 lbers now?
Are the racetronix injectors a good bet 42lbers?
Engine:
LS2
heads
cam
FAST 90
headers
UD pulley
Air box
TECH Fanatic
Joined: Jun 2003
Posts: 1,869
Likes: 99
Go to Mototron 60's.
I have the same issue. I was told 42's would be enough for my LS1 h/c ATI supercharged 346. It's putting out 500 + rwhp at 6-8 lbs of boost. My last log with EFI live showed that the injectors were maxed at 100 percent at wide open throttle at 6k rpm.
I should have started out with 60's from the getgo. Since I will be going forged this winter and upping the boost, no way will the 42's be enough.
So IMO start with 60's especially if you plan on the LS7. If not you will end up buying two sets of injectors instead of one unless you can buy the 42's cheap from someone like me who needs to upsize.
I understand the Mototrons are fairly easy to tune for driveability and idling.
BTW...I think the confusion on sizing injectors on some charts is that it's not clear if the horsepower is brake horsepower or rwhp. 500 rwhp is much more hp when converted to brake horsepower (crankshaft). So do we size for brake hp or rwhp?
I have the same issue. I was told 42's would be enough for my LS1 h/c ATI supercharged 346. It's putting out 500 + rwhp at 6-8 lbs of boost. My last log with EFI live showed that the injectors were maxed at 100 percent at wide open throttle at 6k rpm.
I should have started out with 60's from the getgo. Since I will be going forged this winter and upping the boost, no way will the 42's be enough.
So IMO start with 60's especially if you plan on the LS7. If not you will end up buying two sets of injectors instead of one unless you can buy the 42's cheap from someone like me who needs to upsize.
I understand the Mototrons are fairly easy to tune for driveability and idling.
BTW...I think the confusion on sizing injectors on some charts is that it's not clear if the horsepower is brake horsepower or rwhp. 500 rwhp is much more hp when converted to brake horsepower (crankshaft). So do we size for brake hp or rwhp?
Last edited by dlandsvZ28; Dec 11, 2005 at 08:59 PM.
