I hope I spelled your name right. Awhile back, I saw that you responded with some info about the Bosch 0280150931 injectors. I cannot find any info on these other than that they are stock in a 4.0L F*rd truck engine and are rated 30.2pounds at F*ord's fuel pressure Do you have any idea what scaling factor and delay settings would be needed to run these in the LS1? Thanks

 

Those were some wacky injectors, that's for sure.

What happened here...

For my '94 Z28, I bought some used SVO 30# injectors from a shop. A friend of mine bought some used 30# injectors from the same shop at the same time for his LT1 car - and got the '931s.

I put mine in and had no problems. I set my injector constant to ~32 lb/hr and all was right with my block learns.

My friend put his injectors in - they were a different color than mine (mine had the red top, his - I don't remember the color - but they were different). Anyhow, he stuck his in, rescaled his injector constant to 30 lb/hr, and his LTrims went to 160 (PCM reading 'off-scale lean'). He kept changing his injector constant until his LTrims got to ~128 at idle (0%) - and ended up at about 22 lb/hr for his injector constant.

This started a flurry of questions... And I heard from at least one more person that he'd purchased a set of these '931s as 30# injectors, only to find out that his car ran very lean with them (he had a supercharged car) - so he swapped them out to different injectors and eliminated the problem - but he sold them before he could really test them out any more.

So, if you have a set of '931s, what you can do is to stick them in - leaving your injector constant alone - and watch your LTrims. If you go 'lean' - to +25% (as I suspect you might), then you'll know what's going on. Watch the trims - that's the most important thing when attempting to calibrate.

I do not know why this happened, I just know that it happened to several folks, not just the 2 guys I talked about here. It's been ~2 years since this happened, though.

I do not know the scaling you'd need in the LS1 car for these injectors. This entire incident was in LT1 cars.

Good luck,

-Andrew

 

Thanks for the quick reply. I was thinking of running these in a C5 which has a fuel pressure of 58psi. It is possible that the F*rd trucks have a high fuel pressure which might account for the 30# rating.
I have searched everywhere to try and find the fuel pressure used in the 4.0L trucks, but no luck. I may be getting off-track for this forum, but do you have any idea where I might find that info? Thanks.....John

 

Unfortunately I don't know where you'd find that, unless you called up your local Frod service department and asked a friendly tech question. Never know, you may reach someone who'd be willing to give you an answer. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />

Good luck,

Andrew