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Newbie with a fuel injectoin question
Posted: May 23rd, 2010, 8:37 pm
by markeagan
I am in the middle of a 4.7 build and need to address the fuel injecton. I have done the math and have figured that I need 32lb injectors. I am under the assumption that I can fine tune the a/f ratio with a fuel regulator. The question I have is does the impeadance of the new injector have to match the impeadance of the old (15 ohms)? And also, is the injector length important to match also?
4.2L crank
4.0L rods
custom 10.5/1 pistons with gapless rings
2.02/1.60 LS1 valves
Crane #753941 216/228 degree camshaft
Re: Newbie with a fuel injectoin question
Posted: May 25th, 2010, 2:01 pm
by Cheromaniac
32lb injectors are way too big. If your Jeep is an OBD I HO model ('91-'95), you'll need Accel 26lb injectors.
Re: Newbie with a fuel injectoin question
Posted: June 23rd, 2010, 8:37 am
by zak7711
Hey Dr. Dino, I recognized you from your green XJ..
I got bad news: the 24# FRPP injectors I got are EV1 (Bosch, square) but my harness is EV6 (USCAR, oval)
The seller doesn't return, but offered to sell wireless adapters. Ford Racing FMS-M-14464-U2J sold for $43 at Summit for a set of 8
I think The correct Bosch part # is 0 280 155 865 for EV6 24 lbs/hr @ 43.5psi injectors. That is Ford Racing XR3E-C5B, actually there are other part numbers: XR3E-C5A and XR3Z-9F593-CB so I'm confused.
Ford Racing also makes M-9593-LU24 that is flows at 24# @ 39.15psi, high impedence (11-18 ohms). This means it would flow at 25# at 43.5 psi, and the price for a new set of 8 is $180. I have no idea if it's also pintle type or what.. do you think it's good?