ned
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| posted on 23/1/04 at 02:35 PM |
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cvh/zetec turbo hybrid thingy
I saw this on ebay, yes I know the auction has finished, but thought I'd ask if anyone knows what has been done/what the combinations are. is it
a zetec block with a cvh head? if so hows does it work!
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=2454418936&category=32094
Ned.
beware, I've got yellow skin
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ijohnston99
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| posted on 23/1/04 at 02:37 PM |
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Ned,
Zetecinside has some links/info on the conversion. I think it's relatively simple.
Ian
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200mph
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| posted on 23/1/04 at 02:57 PM |
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is called a ZVH, cvh head, zetec bottom end. These apparently work very well, seeing as they can be tuned to 450+ bhp, and can propel a fiesta to 170
mph
mmm, would be interesting in a locost
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bob
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| posted on 23/1/04 at 03:21 PM |
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Ned
You need to speak with chrisW on this one,i'm sure he knows someting about this method.
I'm also sure its come up before on here too,just needs a bit of searching.
[Edited on 23/1/04 by bob]
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garage19
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| posted on 23/1/04 at 04:23 PM |
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People only run the CVH 8 valve head on the zetec so that they can use their stock rs turbo manifolds and management still.
It you can afford new engine management you are better off sticking with the 16 valve head.
Doug.
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ned
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| posted on 23/1/04 at 05:18 PM |
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I was just curious as i *thought* the cvh was an ohv engine and the zetec was an ohc engine. am i totally wrong here, as otherwise i couldn't
see how they would fit together properly to drive the cams/valves.
this is all out of sheer curiousity btw!
cheers,
Ned.
ok so i did a little search and skim read this site: http://www.jimhearne.co.uk/zvh.htm which explains the conversion. interesting stuff..
cheers all.
[Edited on 23/1/04 by ned]
beware, I've got yellow skin
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James
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| posted on 23/1/04 at 06:20 PM |
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So Ned,
You are still alive then!
Where've you been- I hope it was working on the car!
James
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thebutler
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| posted on 23/1/04 at 06:23 PM |
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How about just bolting the CVH turbo inlet manifold on a zetec, and lowering compression?
ala
http://www.rsrich.force9.co.uk/zetec-turbo/
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James
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| posted on 23/1/04 at 07:04 PM |
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quote:
Originally posted by thebutler
How about just bolting the CVH turbo inlet manifold on a zetec, and lowering compression?
ala
http://www.rsrich.force9.co.uk/zetec-turbo/
As far as I can tell- these guys have used the CVH head- it's not just a case of turbo-ing the Zetec.
Seems like a wicked idea- I'm a bit dubious about the machining of the flywheel/camshaft like that though!
I'd be interested to know if you could use a different management system to save doing the flywheel stuff- like the Megasquirt for example. I
haven't read the Meqsquirt site tho so don't know if you can.
An idea that needs more research I think!
Wicked idea though- cheers for the heads up Ned! 
James
[Edited on 23/1/04 by James]
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zetec
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| posted on 23/1/04 at 07:41 PM |
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Seen a few people use a sandwich plate between the head and block on the zetec to lower compression, then bolt on RS CVH turbo by redrilling the head
as some of the studs are in the wrong place. I don't see why they don't cut off the CVH turbo manifold exhaust flange and weld it onto a
zetec exhaust manifold flange save having to drill the head.
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James
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| posted on 24/1/04 at 02:07 AM |
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quote:
Originally posted by zetec
Seen a few people use a sandwich plate between the head and block on the zetec to lower compression,
Seems a good 'Lowcost' idea!
I'm curious about how they 'bonded' the plate to the block though?
Guess it wasn't a squidge of sikaflex!
Assuming you can change the management what do you gain from this over using the 16v Zetec head with the turbo chopped and then bolted on?
Or am I missing the point...
James
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Peteff
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| posted on 24/1/04 at 11:57 AM |
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The sandwich plate was used on Xflows years ago to enable flat top pistons to be fitted, you put a head gasket either side of it James.
yours, Pete.
yours, Pete
I went into the RSPCA office the other day. It was so small you could hardly swing a cat in there.
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Graceland
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| posted on 24/1/04 at 02:17 PM |
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www.passionford.co.uk
goto forums and have a look round - theres a load of the RS boys using the ZVH conversion on ere, but ti's considered old hat now, and the
blacktop zetec is the way forward for big power 
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James
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| posted on 24/1/04 at 03:10 PM |
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quote:
Originally posted by Peteff
The sandwich plate was used on Xflows years ago to enable flat top pistons to be fitted, you put a head gasket either side of it James.
yours, Pete.
They specifically said they weren't going to do it that way- but didn't say why! 
Cheers,
James
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200mph
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| posted on 25/1/04 at 04:57 PM |
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Ok, have read a thing or two on this, and here's what I make of it..
It's really an upgrade option to the 1.6 CVH engine as found in that old favourite the RS turbo. It offers a relativekly simple capacity
upgrade from 1600 cc to anything from 1900-2100cc. The zetec bottom end is also stronger than the CVH, meaning it's relatively safe to get a
high compression engine by just cranking up the boost.
The weak point in the combination then becomes the head, at it's flow characteristics are poor in comparison with the 16v zetec. The next stage
for the ZVH upgrade then bacomes a stage 2 or 3 head. Of course by the time both of these have been done then price is not too far awya from a custom
turbo'd zetec. So I wouldnt do it if I didnt have an RST to start with.
also, with specialised engines now offering a 1900 block the ZVH seems to be less useful.
Personally, I would have the zeetc everytime.
Except I have a crossflow
Mark
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