madmart
Part of things
love is: valvebounce in top gear
Posts: 559
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hi all
Ive got a mk1 fiesta with a 1.8 zetec bottom end and cvh head kent cam ect and its naturally aspirated,
I'm looking for a better solution for the carbs, I know webber 40's would be ideal, would mikuni Suzuki gsxr 1100cc carbs 38mm chokes be ok? and any ideas on jetting?
many thanks mart
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Last Edit: Nov 10, 2006 3:45:47 GMT by madmart
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carburation?Deleted
@Deleted
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Webers would be fine as would an XR2 carb or the Weber 32/36 found on 1600 crossflows and 2 litre Sierras. With a CVH head you could also use XR2i or XR3i injection with the right bits off eBay. Or RS turbo gear...
I wouldn't bother with Webers unless you have suitable head work and a wild enough cam. It'll just drink fuel when a smaller carb will be adequate.
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madmart
Part of things
love is: valvebounce in top gear
Posts: 559
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Nov 10, 2006 12:04:53 GMT
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hi jonny,
its got a xr2 webber at the mo, how can i identify what cam ive got? got the car as a non runner given up project and i think its got a wild cam, lumpy tick over ect and its dead till the second choke on the carb opens. the previous owner said it had a kent cam and head work done to it
many thanks mart
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carburation?Deleted
@Deleted
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Nov 10, 2006 17:41:19 GMT
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You'll be able to see the head work in the inlets because they won't have a cast finish, it will look ground smooth. To know the extent you need to know what size the ports were originally and measure them now. Same goes for the valves. Kent Cams have the cam number stamped on the front of the cam, so it's under the pulley. Example my Kent 244 has KC 244 stamped in the end. No idea what's mild or wild on the CVH I'm afraid.
Mine was a bit like that with the twin choke. The cam spits back into the inlet manifold and if the manifold ports lead to a single pelnum you'll find that it sucks the spitback into the next port and it ruins the idle. It will affect the power until the revs get up to a certain point. Using DCOE's stops this and you get all your low end power back. If you can find a single DCOE manifold with crossed over ports (1&4 and 2&3 sharing the same barrel so it sucks alternately through each side) it will also solve the problem.
So what does the CVH head bolt straight onto a Zetec bottom end then?
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Last Edit: Nov 10, 2006 17:43:16 GMT by Deleted
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madmart
Part of things
love is: valvebounce in top gear
Posts: 559
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TBH I'm not 100% sure whats been done to mine as ive not had the head off the block but if read up that, The oil return galleys don't line up with the head. 4 of the oil galleys need plugging as they are under coolant holes in the head. The 4 holes that need plugging are on the bottom in the pictures. They are highlighted in green in the picture. Luckily the head bolts and oil feed do line up. The holes have been blanked off with press fitted brass plugs. The holes aren't drilled at 90 to the block surface unfortunately so the block needs skimming off to make them flush.  also holes for the water pump are different and mount needs to have the lower hole moved to match the block. the cam belt and bottom pulleys are all cvh also. mine sounds the same as your twin choke one  I'm going to strip it down sunday check what ive got head wise many thanks mart |
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carburation?Deleted
@Deleted
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Nov 11, 2006 15:21:47 GMT
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Hmm. RS Turbo injection and turbo, CVH head and 2 litre Zetec bottom end would make an interesting combination. Zetec bottom end looks very over square, big bores for its size, so it must be quite happy at revs I'm thinking  |
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madmart
Part of things
love is: valvebounce in top gear
Posts: 559
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yep very revs happy over square lump ;D
i met bloke at work who had a mk4 escort rst with a 2.0 zetec bottom end and it went like stink. if you use the 2.0 zetec bottom end you must use the flywheel from a 1.8 and crank sensor if you use the normal xr2/xr3/rst gearbox as the 2.0 flywheel wont fit in the bell housing. and also a escort zetec sump, the mondeos exhaust cutout is different. oh and the oil filter is at a different angle on the mondeo to escort/fiesta zetec one, but it might not apply depending space and fwd/rwd configuration
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Nov 12, 2006 13:56:12 GMT
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ITBBBBBBBBBBBBBBBBB's  |
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Nov 12, 2006 19:47:10 GMT
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Hmm. RS Turbo injection and turbo, CVH head and 2 litre Zetec bottom end would make an interesting combination. Zetec bottom end looks very over square, big bores for its size, so it must be quite happy at revs I'm thinking theres quite a few RSturbos with this sort of setup, its called the ZVH and can be taken upto 400bhp...........if you have enough money also id sujest just switching to a 2.0 zetec youll need bits off your 1.8 so keep that, then stick bike carbs/throttle bodies on the 16valve head, I'm sure 200bhp can be had quite easily I also saw the other day a 2.0 block with a cvh on downdraught 45's with a mild cam running 175bhp post up some pics of the fiesta pretty please ;D |
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Last Edit: Nov 12, 2006 19:50:52 GMT by samyboy
 once again rocking with 1117cc and 4 gears! |
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Nov 12, 2006 19:50:03 GMT
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its a good route for turbo'd cars, but id say stick with a full zetec if your going carbs anyway
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I'm going to strip it down sunday check what ive got head wise
