ChrisLeary
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 posted on 28/3/11 at 11:56 AM |
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Zetec silvertop tuning
Hi all,
Does anyone have any ideas about tuning a zetec 2.0l silvertop? It's currently on GSXR600 throttle bodies running megasquirt. I'm not
looking to spend £000's, just some basic work that'll release a bit more power.
It's got a standard cast exhaust manifold, will this make a difference if it's changed?
Also, what cars were the 2.0 silvertop's installed in? and which haynes manual would be best for maintenance?
Thanks in advance,
Chris
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Yazza54
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| posted on 28/3/11 at 12:05 PM |
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Custom manifold with tuned length primarys is always going to free up horses as well as a bit of torque.
I'd do the manifold, comp raise and cams. Apparently the zetec bottom end is pretty good and all most people do is fit arp rod bolts. Then remap
your ECU.
Maybe light flywheel too..
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Yazza54
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| posted on 28/3/11 at 12:05 PM |
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Then maybe turbo
I'm unhappy cos I eat and I eat cos I'm unhappy
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Yazza54
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| posted on 28/3/11 at 12:05 PM |
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Or supercharger
I'm unhappy cos I eat and I eat cos I'm unhappy
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Yazza54
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| posted on 28/3/11 at 12:06 PM |
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NOS might be nice 
I'm unhappy cos I eat and I eat cos I'm unhappy
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will121
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| posted on 28/3/11 at 12:18 PM |
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quote:
Originally posted by ChrisLeary
Hi all,
Does anyone have any ideas about tuning a zetec 2.0l silvertop? It's currently on GSXR600 throttle bodies running megasquirt. I'm not
looking to spend £000's, just some basic work that'll release a bit more power.
It's got a standard cast exhaust manifold, will this make a difference if it's changed?
Also, what cars were the 2.0 silvertop's installed in? and which haynes manual would be best for maintenance?
Thanks in advance,
Chris
i would say DIY ported head £50 tools, skimmed to increase compression £45, cams £250-£400, exhaust manifold, ARP rod bolts £60, remap, should see
region of 180bhp dependant on cams.
2 litre zetec early mondeo mk 1's
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ChrisLeary
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| posted on 28/3/11 at 12:25 PM |
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quote:
Originally posted by will121
i would say DIY ported head £50 tools, skimmed to increase compression £45, cams £250-£400, exhaust manifold, ARP rod bolts £60, remap, should see
region of 180bhp dependant on cams.
2 litre zetec early mondeo mk 1's
Brilliant, thanks Will.
Is it easy to port a head? I'm good with aircraft, but not on car engines. Is there anyone on here that would be willing to port and skim the
head for me? or atleast help? 
I'll be buying one of those manuals then, that will help a lot!
Thanks again,
Chris
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will121
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| posted on 28/3/11 at 12:50 PM |
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quote:
Originally posted by ChrisLeary
Is it easy to port a head? I'm good with aircraft, but not on car engines. Is there anyone on here that would be willing to port and skim the
head for me? or atleast help?
Chris
whilst i accept there is skill to profesionally porting a head for best flow which you pay good money for i basically cleaned up the ports opened up
the back of the valve seat and knife edged the port bridge, lots of pictures some where, i am in the process of doing a spare head at mo.
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ChrisLeary
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| posted on 28/3/11 at 01:05 PM |
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Will, is there any chance you could upload some of these pictures please?
Cheers mate,
Chris
quote:
Originally posted by will121
whilst i accept there is skill to profesionally porting a head for best flow which you pay good money for i basically cleaned up the ports opened up
the back of the valve seat and knife edged the port bridge, lots of pictures some where, i am in the process of doing a spare head at mo.
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will121
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| posted on 28/3/11 at 05:50 PM |
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these are some of the pictures of my first head currently fitted at 173bhp with newman 270 cams, its a good spread of power but would have liked bit
more could have gone with 285 kent cams, current head im doing have spent bit more time on it but not got any pictures yet
[Edited on 28/3/11 by will121]
[Edited on 28/3/11 by will121]
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ChrisLeary
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| posted on 28/3/11 at 06:00 PM |
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That looks like some good work. How easy is it strip the head down?
I just hope I can source one now so that I can start work and still drive the car.
Is it true that a 1.8 silvertop head can be fitted to increase compression ratios slightly?
Cheers,
Chris
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ChrisLeary
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| posted on 29/3/11 at 09:57 AM |
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quote:
Originally posted by ChrisLeary
Is it true that a 1.8 silvertop head can be fitted to increase compression ratios slightly?
Cheers,
Chris
Does anyone know the answer to the above?
Thanks,
Chris
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will121
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| posted on 29/3/11 at 07:16 PM |
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quote:
Originally posted by ChrisLeary
That looks like some good work. How easy is it strip the head down?
I just hope I can source one now so that I can start work and still drive the car.
Is it true that a 1.8 silvertop head can be fitted to increase compression ratios slightly?
Cheers,
Chris
some good reading here about compression caculations, sugests 1.8 head gives 10.78 compression
zetec compression caculations
as for stripping head, need a deep valve spring compressor and bit fiddly to get valve collers off and back on and a nack to removing stem seals, once
got hang of one its just x 16 including lapping valves
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ChrisLeary
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| posted on 30/3/11 at 11:23 AM |
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quote:
Originally posted by will121
some good reading here about compression caculations, sugests 1.8 head gives 10.78 compression
zetec compression caculations
as for stripping head, need a deep valve spring compressor and bit fiddly to get valve collers off and back on and a nack to removing stem seals, once
got hang of one its just x 16 including lapping valves
That's a interesting read, i had to read throught it twice to understand the equations fully. But very interesting.
So would it actually be of benefit to put 1.8 head onto the 2.0 bottom end? Like I said before, I'm good with aircraft, but not with car
engines.
Cheers,
Chris
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will121
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| posted on 30/3/11 at 07:08 PM |
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It said to increase compression by 0.8 ish weather that Is notable or not I don't know, if porting a head would expect you would get it skimed
anyway. I had 0.75mm taken off my 2 litre head for same result
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