Comical Engineer Posted September 15, 2004 Share Posted September 15, 2004 Mornin' all - Hope the wealth of knowledge out there can help. Off to the factory next Saturday with the missus to order the kit and have a spin in the test car - taking her to get 'final approval' if you like (for the car, not the wife!! Anyway.... Until the kit is ready, I've been rebuilding a 1800 zetec to keep me busy and go into the car and have a couple of q's regarding the fuelling: 1. Will be using DCOE 40's and the set i have has 30 mm chokes. Anyone out there know if this will be OK to run with? Any advice on jetting to get the engine away? 2. Inlet manifold - 2 non westfield types available - 65mm and 95mm. Which size do I go for? I only ask as the most expensive Burton Power one (the 65mm) is cheaper than the standard Westfield one.....Look after the pennies etc. 3. Thinking of going for the Weber Alpha ignition system. I presume that it mates up with the ignition pack that came with the Zetec - correct? Oh yes....and the 25 quid for the membership went in the post this morning. Any words of wisdom appreciated. Cheers. Quote Link to comment Share on other sites More sharing options...
neilb Posted September 15, 2004 Share Posted September 15, 2004 I think that the 30mm chokes will be a bit small check Dave Andrew's for more info on carbs. The shorter manifold as I think that with the 95mm you might have problems getting the bonnet on. HTH Neil Quote Link to comment Share on other sites More sharing options...
Blatman Posted September 15, 2004 Share Posted September 15, 2004 DON'T GET WEBER ALPHA...... Can't help on manifold size, but if you want to keep the carbs/filter under the bonnet without having to cut a hole, then you'll be wanting the shorter one.... Dave Andrews web site has a jetting programme for initial carb set up. I would have though that 30mm is too small, with 32 or 34mm chokes being more appropriate. FWIW Dave Andrews little jetting programme correctly guessed the jetting for my N/A Cossie on 48's..... Quote Link to comment Share on other sites More sharing options...
Blatman Posted September 15, 2004 Share Posted September 15, 2004 Beaten to it. Mornin' Neil Quote Link to comment Share on other sites More sharing options...
Comical Engineer Posted September 15, 2004 Author Share Posted September 15, 2004 Cheers, Dave Andrews program reccommends 32mm chokes - am off to check the jet sizes against the reccommendations. As an extra, anyone know if the flat pulley on a Mondeo Zetec water pump can be changed out for a V grooved one? In order to get the alternator mounted on the other side, the belt run will be on the opposite side to that designed. Or is it a different water pump altogether I need? Cheers, Alex. Quote Link to comment Share on other sites More sharing options...
david matthias Posted September 15, 2004 Share Posted September 15, 2004 Hi Alex usually you need a water pump from an 1.8ltr Escort & a grooved pully as the rotation is opposite once you have removed the excess pullys etc. If direction of rotation does not change then yes a grooved pully fits straight on. cheers David Quote Link to comment Share on other sites More sharing options...
James Posted September 15, 2004 Share Posted September 15, 2004 I would agree with blaters on the webber alpha mine is Emerald and very easy to use but I have heard good things about mbe as well. As far as jets are concerned 32mm chokes were recomended to me by emerald im putting them in my car tonight so ill let you know how they are im currentley on 34mm and I have a glitch at 2000 rpm it is hoped this will sort it out as far as jetting is concerned it depends who you talk to rolling road would be your best bet Quote Link to comment Share on other sites More sharing options...
neilb Posted September 17, 2004 Share Posted September 17, 2004 Beaten to it. Mornin' Neil By nearly five minutes and we came up with the same answer, what the chances of that happening again Quote Link to comment Share on other sites More sharing options...
Blatman Posted September 17, 2004 Share Posted September 17, 2004 Never say never.... Quote Link to comment Share on other sites More sharing options...
Kevin Wood Posted September 17, 2004 Share Posted September 17, 2004 Have a look into the cost of chokes. IIRC they're not the cheapest of Weber parts and to just go up 2 mm in size will probably not make a massive difference. I'd be inclined to try the 30mms first. You might want to do other tuning work on the engine at a later stage and this will probably require yet another choke change. What you lose in top-end power with slightly smaller chokes you will gain in flexibility lower down the rev-range so it's a compromise which you might be willing to accept. Raceline only spec'ed 34mm chokes for the 190BHP 2 litre engine I have. They reckon they found it difficult to get decent fuelling over the whole range with anything bigger and after playing a bit myself I'd agree, although I might have got them working a bit better had I not decided to go injection. As for ignition, the Alpha system cannot be mapped by anyone except an Alpha dealer so strike that off the list. I had a GEMS (now OMEX) system and it did the job but had an irritating habit of kicking the engine backwards occasionally due, I suspect, to a mis-timed spark during cranking making it difficult to start sometimes. Tried backing off the cranking advance to no avail. Maybe newer firmware has cured this but there was no upgrade path from my ignition-only box to injection. Emerald is a well respected system with an upgrade path to injection AFAIK. If you're on a budget and don't mind getting involved in some of the techie stuff, you could try a Megasquirt. Kevin Quote Link to comment Share on other sites More sharing options...
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