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ED Tickford head onto EF? 

 

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 Post subject: ED Tickford head onto EF?
Posted: Wed Jan 14, 2009 11:23 pm 
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Just wondering has anyone transfered the complete Tickford head off an ED engine to an EF engine?

 

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Posted: Thu Jan 15, 2009 12:34 am 
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yeah mate pritty much straight swap the only difference is the rocker cover. Which just depends on which one you are going to use. If you use the ED one get the ED gasket if you use the EF get the EF gasket pritty straight forward.

 

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Posted: Thu Jan 15, 2009 1:29 am 
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i have what started out life as an EB head on my EF, straight swap.

i cant remember how my mechanic got the ef rocker cover to fit or if there was any problems, but from memory he had to gring a bit off the front and back, cant remember for sure.

 

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Posted: Thu Jan 15, 2009 5:53 am 
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The only difference between the rocker covers are the EF one has little half moon things on the rocker cover and the ED doesnt but all you do to the head is pull the little grommets out of the ED head and the EF rocker cover fits straight on.

 

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Posted: Thu Jan 15, 2009 8:39 am 
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Actually, there is another difference. On close inspection you will note that on each side of the half moon, on the EA-Early ED heads the edge is sqared off, a right angle. On the Late ED-AU heads the edges is curved.

While in theory this may cause issues when fitting a late ED-AU rocker cover on the earlier heads, many members have had no problems at all.

BenJ

 

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Posted: Thu Jan 15, 2009 11:11 am 
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thanks for the replies.

 

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Posted: Thu Jan 15, 2009 9:47 pm 
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Well i got a hybrid ED engine,my build date is 7/94 with a different rocker cover to the earlier EA's to ED's.The gasket that suits my rocker cover is the EF/EL little rubber one and i cannot use the earlier gasket suited to the ealier EA/ED's.
My rocker cover has the groove all the way round like the EF/EL rocker covers.
The head on my engine is a 94 AB which is an EF meaning i have the equivalant to an ED XR head???Please correct me if im wrong.
There is a difference in performance compared to any ealier model ED not a great deal but it is noticeable.

 

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Posted: Fri Jan 16, 2009 7:48 am 
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KRUPTD wrote:
Well i got a hybrid ED engine,my build date is 7/94 with a different rocker cover to the earlier EA's to ED's.The gasket that suits my rocker cover is the EF/EL little rubber one and i cannot use the earlier gasket suited to the ealier EA/ED's.
My rocker cover has the groove all the way round like the EF/EL rocker covers.
The head on my engine is a 94 AB which is an EF meaning i have the equivalant to an ED XR head???Please correct me if im wrong.
There is a difference in performance compared to any ealier model ED not a great deal but it is noticeable.



the ed,s with the 94ab head built in 94 are actually fitted with ef block and head..
but there is no difference in valve size or valve springs ect compared to ea/eb/ed so a 94ab head being equivilant to ed xr head is a myth...
afaik the only thing the 94ab has over the 91ab is is the 9.35-1 compression..
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Posted: Fri Jan 16, 2009 11:33 am 
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KRUPTD wrote:
Well i got a hybrid ED engine,my build date is 7/94 with a different rocker cover to the earlier EA's to ED's.The gasket that suits my rocker cover is the EF/EL little rubber one and i cannot use the earlier gasket suited to the ealier EA/ED's.
My rocker cover has the groove all the way round like the EF/EL rocker covers.
The head on my engine is a 94 AB which is an EF meaning i have the equivalant to an ED XR head???Please correct me if im wrong.
There is a difference in performance compared to any ealier model ED not a great deal but it is noticeable.


thats right! some of the very late ED's had the different rocker cover, and the 94DA heads, which is what the start of the EF's had ..

The 91AA head flows the best, but then you need to use a EA-EB-early ED rocker cover and gasket ..

I think I have one of the late model ED rocker covers around somewhere .. But can't remember if its the tickford cover or not ..
but it was factory painted red

Laticia .

 

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Posted: Fri Jan 16, 2009 8:38 pm 
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So the valve sizes on the ED head compared to an EF head are the same size???I had read on here on one of the threads that mentioned that the EF onward heads had larger valves either exhaust or inlet compared to the EA - ED.???

I will see if i can find it and post it up.

 

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Posted: Fri Jan 16, 2009 9:38 pm 
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I found this,but am still looking for the rest.

Steady ED wrote:
96DT is EL Hybrid tickford head.
95DT is the pre feb-98 EL ticky casting.
94AB is the casting that is said to ahve the biggest ports, not necessarily the most flow or the best performance.
Don't know how it compares to a 95DA though, I've never even seen a 95DA.
Late EDs got bitza motors, some got the fully counterweighted EF crank and EF head.
Or could have just had a headswap in it's life, pretty hard to say.


This was in the thread "94AB Head vs 95DA Head".

 

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Posted: Fri Jan 16, 2009 9:55 pm 
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Have found some more info,
paulc wrote:
AB94 is your best flowing standard head. This is the base head that CMS use for all his head work.

EL__Fairmont wrote:
94AB head is the best flowing standard head.  EF's and early EL's have these heads.  My El fairmont has one of these heads...  The mock boys say these are the best heads also for gains.


Found these on the thread "best head//best flowing e-series head"

 

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Posted: Fri Jan 16, 2009 11:40 pm 
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all that sounds about right..

its the std au head and posably el hybrid head that has the same size exhaust valves as the eb/ed/ef tickford heads.
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Posted: Sat Jan 17, 2009 1:14 am 
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Ah, now I know why snap0964 wanted the 94AB head of my dead ED motor :)

 

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