Kevs EA

Just out of interest, Im getting a 3.9 EA rebuilt with extensive mods; stronger valve springs, bronze guides, larger valves and major port work. [Gulp!] After the change over the other head is for sale...... every part 8000 kms old.
Then found this bloke who designed a cam with a slightly shorter duration and a bit more lift than the Crow stage 2 cam. The theory being that the valve opens and closes quicker, and the duration is not so long as to give a rough idle or trouble the computor. Anyway, I think Im his second guinie pig.
Anyone have any opinions on the Crow cam as the news Ive heard isnt too flash.
Kev.

Troutman

I've heard mixed reports too. However, I think Thanatos has a Crow cam and his car is probably the quickest EA in the club...

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jamesk

firstly i would say that the massive port work and larger valves are going to trouble the computer in itself so i wouldnt be worrying now about the cam. ive just read an article about someone designing a cam for the ea and the best profile they could get with no computer problems was 195deg duration at .050 and .490though lift 264deg duration advertised. the computer runs into problems when it reaches below 16-17 inches vaccum at idle. standard is around 19-20 so you dont have much room to play with.

SiX_iN_a_RoW

Is it true that they cannot get the CFI EA's to idle properly with a different profile cam? I dont see a cam with a grind similar to the XR6 cam causing too many dramas as they are fairly mild.
I would love to fit a decent cam to my CFI

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jamesk

well when we rang crow about a cam for a cfi they told us not to bother as the cfi's do not like having a modified cam

donuts2001

The Question is, why would you bother putting a Crow Cam into a CFI motor?

6pAc|30nG|00n

what about a mpefi 4.0 in my ed using eec-4

SiX_iN_a_RoW

Why not?

I dont see any point at present in converting to MPFI when my car runs fine the way it is...just curious with cam choices for future reference is all...get all of these people dogging the CFI engines but theyre really not a bad donk at all...I know mine spins quite easily off the line and thats with a half stuffed gearbox

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NZ

Have you driven an MPI?

SiX_iN_a_RoW

Cant say that I have been behind the wheel of one no - but have certainly been in a few before.
Also alot of people who have done the conversion say there isnt a great deal of difference

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Black Steelies ( too cheap to buy proper mags )