Skirrow
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| posted on 24/3/14 at 03:34 PM |
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Zetec standard exhaust manifold performace
Don't suppose anyone knows how well the standard Zetec manifold flows compared to aftermarket ones?
Or more to the point, how much power will I be missing out on if I use this instead of an expensive one
This sort of thing -
[Edited on 24/3/14 by Skirrow]
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Skirrow
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| posted on 24/3/14 at 03:47 PM |
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Should say it's a standard 2.0l blacktop with ZX9R carbs and megajolt
And the manifold is actually like this one -
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loggyboy
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| posted on 24/3/14 at 03:52 PM |
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I considered this route, as it looked a nice easy (and cheap) way of getting the car on the road. Its got to be a massive compromise based on trying
to squeeze the engine in to a small space (even the mondeos engine bay isnt huge) and the fact that bhp figures were largely unimportant for the sort
of cars the xetec was fitted to.
If its to get you on thru IVA/on road with the view of replacing when time and money allows then go for it.
In the end I picked up a 2nd hand unused DIY manifold kit (check out ebay, circa £99) which Ive been making up myself. Much larger primarys and a more
direct exit route. Even if its far from perfect, Im hoping it will be nice compromise between using the OE one, and spending a fair amount on a
custom one.
Pics of mine:
http://loggyboy.com/images/Raw/Exhaust/
Mistral Motorsport
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Skirrow
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| posted on 24/3/14 at 04:00 PM |
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Cheers, car is already IVAed but I'm mid-way through converting from Pinto to Zetec and just found out that it'll be a few weeks to wait
for the correct stainless one.
Trouble is the stainless one is an over the rail job and the cheap option above would be through the side panel so if I change later I'll have a
big hole in the side to fill in.
Struggling to find ant info on the net that gives a rough idea of how much hp is gained with a stainless one. I know the standard one will likely be
less, but if it's only 3-4hp I can live with it. If it's 10-15 then I'll hang around a few weeks!
Is this the sort of thing you went for? 421 ZETEC RWD DIY EXHAUST MANIFOLD KIT TO SUIT KIT CAR 45mm PRIMARIES 57mm TAIL
[Edited on 24/3/14 by Skirrow]
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bimbleuk
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| posted on 24/3/14 at 04:19 PM |
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Friend of mine used the boggo manifold on his blacktop and saw around 160-170 max on it. So actually not too bad to start with. He did cut off the
flange and welded on a single down pipe to create a bit more room as it was tight in his oval hot rod.
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Skirrow
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| posted on 24/3/14 at 04:25 PM |
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Cheers! Was only expecting 160ish anyway so might just give it a ago, at least for this summer
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Paul Turner
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| posted on 24/3/14 at 04:41 PM |
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In fairness to the Blacktop one its way better than the Mondeo Silvertop one which was only of any use as a cast iron doorstop.
But compared to a proper 4 into 1 its small diameter, tight bends and short lengths will do nothing for the potential of the engine. No point putting
lots of air in through your ZX9R carbs then strangling it when it tries to get the gasses out.
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me!
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| posted on 24/3/14 at 06:26 PM |
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Is the ST170 one any good? It'll need a bit of chopping about to suit RWD obviously, and it'll be through the side panel, but it should be
good for more power than you're after
Ford Focus ST170 - Exhaust Manifold 2001-2004
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Scuzzle
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| posted on 24/3/14 at 06:57 PM |
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Good thing about the performance shorty manifolds is the flange is in exactly the same place as the standard one so you can fit the standard one to
get you up and running and upgrade later if you want.
When I did mine I got a manifold like the one you have pictured off Ebay fairly cheap and I got an engineering place to make up a matching mating
flange to fabricate the down pipe from but in hindsight I would actually have been cheaper just buying a standard Focus manifold and cutting the
flange off of that because they are on Ebay all the time for £20 ish.
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big_wasa
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| posted on 24/3/14 at 09:04 PM |
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quote:
Originally posted by me!
Is the ST170 one any good? It'll need a bit of chopping about to suit RWD obviously, and it'll be through the side panel, but it should be
good for more power than you're after
Ford Focus ST170 - Exhaust Manifold 2001-2004
It chops up nicely but hits the solenoid on most starter motors.
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austin man
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| posted on 24/3/14 at 10:03 PM |
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I have used this on my 1.8 Silvertop, plenty of space under the bonnet, had a downpipe mad by Martin Keenan (Mk Engineering) the I welded the two
together.
I think this will be as good as most of the off the shelf manifolds as they have usually been made for looks over performance I also run the ZX 9
carbs on megajolt
Life is like a bowl of fruit, funny how all the weird looking ones are left alone
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Skirrow
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| posted on 24/3/14 at 11:36 PM |
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Cheers fellas,
Austin man, do you mean you have used the standard focus one? Like in my second photo of the full engine?
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