An EF/EL head will bolt straight on to an EA - ED block. I have an EF head on my ea. Also the EF/EL manifold will bolt onto an EA head. So really theres a lot thats interchangable, but with the ef manifold use ea injectors, and somehow limit the regulator to 250kpa to stop rich running as ef/el is 275kpa
thanks for the reply NZ, just a couple of questions from that:
I want to run the EL head/manifold on the EA block... Do I need an EL computer? Will running the EL Head/manifold on the EA block offer any performance increase/decrease??
Also, how did you end up limiting the regulator?
And another thing, what parts did you need to do the conversion and how much did it set you back??
I dont think that a increase in fuel pressure of that size will pose a huge problem especially since its breathing easier due to the better designed ef/el head. Computer should adjust to suit anyway.
if it really worries you dont bother stuffing around with the ef/el regulator, just get an old ea one and chuck that in
with the ef/el head you should make more power as it is better designed for improved flow etc
So a 4L ef/el head will bolt straight onto the 3.9L block without any hassels at all? I am looking at replacing my head and rings etc. in the near future and i might look into getting an ef/el head if thats the case.....
I'm running a standard EA block. The head is the original EA, recoed with port & compression modifications.
I have the EF intake, EL Rocker gear, EF Rocker cover, AU Lifters & TPS, EA ISC & Injectors, XR pressure reg, VDO fuel pump, EA 5 speed ECU (rev limit 5500, no speed limit) and a custom manifold module.
If you are going to put an EF/L head onto your EA block, it would be wise to take some measures to increase the compression. The standard EA comp is aprox 8.8:1. Bolting on the EF head will reduce this even further because of the chamber design.
NZ would be the one who can tell you the most about gains from running an EF head.
There are an enormous amount of interchangeable parts between EA-AU... its good fun.
How to get it all working together... many hours in the garage :s2:
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