Ducman82

Got my LH spider from England yesterday (best Xmas gift ever) , but I'm not sure what injectors I will need..... For my L-jet set up I got Carls L-jet " replacement" injectors but I had to drill out the holes so they would fit, due to the ledge u see just inside the injector hole. I don't mind milling the hole out, just need to do it before they get cleaned and coated.

John Speake

The Euro LH runners are for the 24# high impedance barbed top hose connection. What power are you aiming for ? Boosted ? Using the 24# injectors and S4 FPReg at 55psi as against the S2 35psi may be enough for a mild power increase. (You will get 25% more available fuel flow)

Ducman82

I'd like to get away from barbed Injectors, thinking of boost in the future. But injectors are easy enough to swap. Looks like I will need to do some drilling! :-)

toofast928

All Bosch style injectors will fit the intake runner hole, I use 48# Venom Injectors. Just change the pintle cap, make or purchase a fuel rail, and convert the EMS

RCinXS

+1

Ducman82

can you get the pintle caps and seals still? i don't have old injectors...

John Speake

Yes

U-928

Good timing on this thread, I was in the exact same boat.

Ducman82

I do what I can

atb

Thanks for the heads up Tony. Does that mean any high impedence injector will work in an L-Jet manifold as long as you use the stock low impedence pintle cover on the new injector? (I'm planning on using a different fuel rail)

toofast928

Adam L-Jet are low impedance, you can not use hi impedance injectors with L-Jet.
I'm using Haltech EMS and changed the pintle cap to accept Bosch one hole hi impedance injectors, (the Bosch injectors in the pic are high impedance). Made my own fuel rails to accept the o-ring top injectors.

You can still purchase low impedance injectors that flow more than the OEM 24#. But L-Jet is so old and I bet your engine wiring harness is starting to crumble time to upgrade everything.
Tony

danglerb

Low impedance = high drive current.
High impedance = low drive current.

I think it works backwards to what you said, you can't use a low impedance injector with a high impedance brain, but either work with a low impedance brain.

toofast928

Danglerb thats not correct.
ECM controller has a specific injector ohm valve. Injector values are not interchangeable.

Fabio421

Not to mention you would have a hell of a time finding a high Impedence barb style injector. I've spoken to a couple of injector rebuilders and they swear that there is no such thing as a high impedence barb style injector. When I tell them about the LH Euro's from 85-86 928 they just shrug and say it is very rare.

Ducman82

what is a good way to calculate how much fuel pounds per hour is needed?