Lucas "laser "style injectors or bosch disc style

mxmang · Post by **mxmang** » Tue Oct 23, 2007 12:40 pm

I think I'm maxing out my 19 lb injectors on my engine making around 150 160 hp... any thoughts on if i should use these bosch disc style?

I read the faq from sdsefi and it was saying the ones i have now have lousy throttle response and bad idle but the bosches should work a lot better overall... (better atomization etc.)

Btw its like 190 cc with the lucas 19#'s and 24 lb or 240 or so cc with the bosch discs....

Any input is appreciated!

FridgeFreezer · Post by **FridgeFreezer** » Wed Oct 24, 2007 1:22 am

When you say you think you're maxing out your injectors, either you are or you aren't - does the duty cycle hit more than ~80-90%? If so, they're maxed out and need to be bigger. If not, you're not maxing them out and it's something else.

What SDS actually say is:

The Lucas type buries the disc up inside the body to reduce the mass of the assembly for quicker response. The Lucas types typically have a very narrow spray pattern which can affect idle and throttle response in some cases.

I say if the symptoms they mention are that noticeable on your engine, try other more obvious things first, like tuning (which costs nothing) before swapping injectors. I run the Lucas type on mine and have had no problems.

mxmang · Post by **mxmang** » Sat Oct 27, 2007 2:39 pm

the boschs were old and were from an engine which was 100 hp n/a stock... i'm using an engine that makes around 150 160 hp

good news, injectors running 13.2-5 :1 make an 81% duty cycle in 3rd gear around the peak power levels...

in my case, these injectors helped, not to say either design is superior, thanks anyways!