ea and ef motors?

shoey50 · 01-11-2005, 12:31 AM

hey guys am looking for a motor to build for a turbo setup i have a ef flacon i6 and was wondering what the difference between ef and ea motors are cause i can get a centre point ea motor for nothing should i build this up?? are the blockes the same? i would be putting new pistons in etc could i just work the ea head to ef spec or could i put a ef head on what do you guys think??? cheers guys

d_slayer · 01-11-2005, 12:36 AM

the blocks are the same but if i was you i would work the EF head and make it better

Streeter · 01-11-2005, 01:01 AM

Quote:

Originally Posted by shoey50

hey guys am looking for a motor to build for a turbo setup i have a ef flacon i6 and was wondering what the difference between ef and ea motors are cause i can get a centre point ea motor for nothing should i build this up?? are the blockes the same? i would be putting new pistons in etc could i just work the ea head to ef spec or could i put a ef head on what do you guys think??? cheers guys

the ea head is very different the motors are the same minor some little differences but as for working the head i would get a second hand ef head off a tickford six and flow it as they have slightly better castings other wise the ef head is by far the best option as the ea has low comp swirl in it and has poor castings is very workable but the heads are crap for large amounts of work best peice of advice is work the motor that you have in your car now and then you also get to keep the same engine number and dont have to tell the rta

shoey50 · 01-11-2005, 01:12 AM

so i could use the block? but buy a ef head then it would basically be a ef? cause it will be a slow build up so i couldnt work my original motor and when its done will be transplanted

EFFalcon · 01-11-2005, 01:21 AM

use the EF head, and use nicely dished pistons in either block

shoey50 · 01-11-2005, 01:28 AM

Quote:

Originally Posted by EFFalcon

use the EF head, and use nicely dished pistons in either block

yeah am planning on using pistons like that know any brands i could go price please say i can buy them off the shelf and not have to mechine them

EFFalcon · 01-11-2005, 01:29 AM

honestly no idea.
Sooner or later i'll be looking into it myself, but i havnt bothered yet.

shoey50 · 01-11-2005, 02:30 AM

no doubt am goin to need to know brands on rods and rings etc so anyinfo would be cool anything else people can think of to tuffen it up?

outback_ute · 01-11-2005, 09:59 AM

Use the EF crank

shoey50 · 01-11-2005, 10:11 AM

Quote:

Originally Posted by outback_ute

Use the EF crank

righto is there a difference? just tuffer?

Streeter · 01-11-2005, 10:46 AM

not really but the ef crank is a little better but it does not matter if you do all the right things to your engine like nitrating the crank and rods after market rods and pistons blue print and balance the whole engine and do the head

shoey50 · 01-11-2005, 01:46 PM

are they a differrent stroke or anything seeing as the ea motor is 3.9 and ef 4.0 ltr?

shoey50 · 02-11-2005, 03:12 PM

what do people think keeping in mind thhe motor is for free thats the only reason i am considering this

outback_ute · 02-11-2005, 07:09 PM

Quote:

Originally Posted by Streeter

not really but the ef crank is a little better but it does not matter if you do all the right things to your engine like nitrating the crank and rods after market rods and pistons blue print and balance the whole engine and do the head

To answer Shoey's question, the EF crank has extra counterweights so it is better balanced. The extra 35cc in the 4.0 engine come from a slightly larger bore.

Streeter I agree a properly treated & balanced crank is more important no matter which way you go. On a shoestring build like this one sounds like (practice build?) perhaps use the EA crank until you are ready to build a motor "properly" (as described in quote).

shoey50 · 02-11-2005, 10:28 PM

might just go the ef motor then i think

niko · 03-11-2005, 01:15 PM

whys ef more pupular than el?

d_slayer · 03-11-2005, 03:02 PM

ef look a lot better more meaner looking well thats what i think

shoey50 · 03-11-2005, 04:24 PM

do you mean body wise or motor wise?

Smoked · 03-11-2005, 04:35 PM

The EF motors had 12 counterweights as opposed to the EL which had 8, so its slightly smoother.

Also, the EF motors had coils rather than distributor like the EL went back too..

niko · 03-11-2005, 05:08 PM

look at the title of the thread guys... "ea and ef motors?"

whats this counterweight thing

d_slayer · 03-11-2005, 05:50 PM

front end wise (body)