Dusty
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| posted on 10/7/06 at 08:52 PM |
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Zetec heads.
Does anyone know if the 2L zetec phase 1/2 head will go on a phase 3 engine. Does it fit and will the hydraulic lifters work. I want to clean up the
phase three head, fit 285 cams and bits but I don't want to be off the road for long. I did read somewhere that the blacktop has slightly bigger
valves as standard but can't find the reference.
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muzchap
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| posted on 10/7/06 at 09:24 PM |
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I'm also interested in this - so hoping somebody can confirm (and quickly - hint hint  )
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If you believe you're not crazy, whilst everybody is telling you, you are - then they are definitely wrong!
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stevebubs
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| posted on 10/7/06 at 10:39 PM |
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apparently not....sure it's been covered here before...
[Edited on 10/7/06 by stevebubs]
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stevebubs
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| posted on 10/7/06 at 10:40 PM |
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I think some "minor" changes were made to the phase 3 engine which included slighly respacing the cylinders to give more meat between
2&3.
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garage19
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| posted on 11/7/06 at 06:45 AM |
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quote:
Originally posted by stevebubs
I think some "minor" changes were made to the phase 3 engine which included slighly respacing the cylinders to give more meat between
2&3.
Wrong!
I have a early bottom end (should be hydraulic head) running a later bucket over shim head with no problems!
The cambelt tensioner mounts in a different way but it is very easy to engineer a solution.
[Edited on 11/7/06 by garage19]
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muzchap
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| posted on 11/7/06 at 08:50 AM |
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Garage19 - do you have any pics of that mate
Very interested to see the engineering solution
Also can anyone confirm that the Phase3 head has bigger valves and would be a better option to CAM than the original head?
[Edited on 11/7/06 by muzchap]
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If you believe you're not crazy, whilst everybody is telling you, you are - then they are definitely wrong!
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02GF74
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| posted on 11/7/06 at 09:45 AM |
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quote:
Originally posted by garage19
Wrong!
I have a early bottom end (should be hydraulic head) running a later bucket over shim head with no problems!
The cambelt tensioner mounts in a different way but it is very easy to engineer a solution.
I asked Burton Power as to whether the later heads (solid lifter = black top) could be slapped onto the earlier block (hydralic lifeter = silver top);
replies as follows:
" the heads are not interchangable as they both have different chambers."
and when I queried what difference the chamber shape makes since if they are in the same poistion is shouldn't matter,was told:
"the early zetec uses a different lenght rod and piston combination."
??????
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muzchap
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| posted on 11/7/06 at 10:32 AM |
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Hmm - that's strange :-(
Who do we now believe then - seems strange that Burton changed their minds halfway through.
I might just grab one out of the scrapyard and try myself.
Garage19 - although you have got them to fit, have you fired it up? I'm guessing you would have turned the crank to check there was no banging
etc.
I'm inclined to go with Garage19 on this one - especially if his is up and running!
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If you believe you're not crazy, whilst everybody is telling you, you are - then they are definitely wrong!
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garage19
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| posted on 12/7/06 at 11:49 AM |
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Right, from memory the black top head has 1mm larger valves on the inlet.
The rod length is different on the black top but this is compensated by having a shorter compression height on the piston so the crown of the piston
sits in the same place in relation to the block deck.
They are interchangable. I will post up some pics later on showing the engine during its build.
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Dusty
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| posted on 16/7/06 at 10:58 PM |
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Getting confusing. Blacktop head on silvertop bottom end OK. Silvertop head on blacktop bottom end don't know.
This now seems to be less important as I have further info on cams and it seems the blacktop gets very expensive very quickly. New post added,
'Zetec and piper cams.'
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muzchap
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| posted on 16/7/06 at 10:59 PM |
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But the blacktop is solid lifters - imperative if you want to rev hard!
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If you believe you're not crazy, whilst everybody is telling you, you are - then they are definitely wrong!
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Dusty
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| posted on 17/7/06 at 01:05 AM |
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Just have to set the rev limiter at 7500 and live with it.
I believe the blacktop is a better engine but I don't want to spend an extra £500 and get less power. If I wanted to go above 200bhp then I
would stick with the blacktop and spend the money.
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muzchap
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| posted on 17/7/06 at 08:56 AM |
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I got a SilverTop making 155hp @ 6300.
I'll cam it and do some headwork next year and try to get it close to 200hp.
To be honest - that's quick enough in a Seven type car - mine feels scarily quick at the moment :-)
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If you believe you're not crazy, whilst everybody is telling you, you are - then they are definitely wrong!
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Dusty
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| posted on 17/7/06 at 11:02 AM |
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Looking at the silvertop head I have just stripped there are obvious power gains to be had with a little reaming of the throats and the shortside
turn. Pic in archive as the post picture box is still not appearing.
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