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Pie Part of things Bacon pancakes bacon bacon pancakes Posts: 321	weber help Pie @pie
	Jan 31, 2013 15:08:27 GMT Select Post Deselect Post Link to Post Back to Top
	Right, fully aware this is not going to be the most active topic, however I thought anyone could help me on here. As some of you may be aware I have a pair of DCOE40's waiting to go on my car. I'm at the last stage of buying all the last bits and bobs before taking the plunge and making the manifold and fitting them. I have got to the point where I have looked at the jets currently fitted, at present I have; Main jets; 100 Idle jet; F11 / 50 Air corrector 140 Pump jet 35 Compare that with the recommended setup for a standard 2.0/1.8/1.6 pinto; 34mm Chokes 135 main jets F11 emulsions 190 air correctors 35 pump jets 40/f9 idle jets,45/f9 for 1800/2000 4.5 aux vents Now I'm struggling to find out what size venturi's are fitted (chokes). I have taken one of the chokes out, and the only identification I can find is the number 45. However I didnt think 45mm chokes were available for DCOE40's nor 45's. So what I am after is advice on what jets to fit to the 1.6 mx5 engine, and how i can identify what size chokes I currently have. Cheers in advance.
	"Its a small world, but I wouldn't like to paint it" lathamescortmk2 said: if your not about 'show' then WTF is drifting all about?! its marked with scorecards like strictly come dancing FFS ;D ;D

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jrevillug Posted a lot Posts: 3,520	weber help jrevillug @jrevillug
	Jan 31, 2013 15:19:58 GMT Select Post Deselect Post Link to Post Back to Top
	The choke size is simply the internal diameter at the narrowest point - a set of vernier calipers should be sufficient. As for jetting, you'd be best off getting it set up on a rolling road once it's all together and running - anything else is a stab in the dark.
	Last Edit: Jan 31, 2013 15:20:45 GMT by jrevillug Caution: As the buoys marking the shoals are often out of position, mariners are cautioned to be on their guard when navigating these shores 75 Imp 72 Clan - What? An update? Never!

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Pie Part of things Bacon pancakes bacon bacon pancakes Posts: 321	weber help Pie @pie
	Jan 31, 2013 15:25:09 GMT Select Post Deselect Post Link to Post Back to Top
	Thanks for the reply, will measure the internal diameter. I will get getting it set up on the rolling road, however what I meant is, what size jets should i be looking for?
	"Its a small world, but I wouldn't like to paint it" lathamescortmk2 said: if your not about 'show' then WTF is drifting all about?! its marked with scorecards like strictly come dancing FFS ;D ;D

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jrevillug Posted a lot Posts: 3,520	weber help jrevillug @jrevillug
	Jan 31, 2013 15:29:45 GMT Select Post Deselect Post Link to Post Back to Top
	Jan 31, 2013 15:25:09 GMT Pie said: I will get getting it set up on the rolling road, however what I meant is, what size jets should I be looking for? That's one of the things to be determined on a rolling road.
	Caution: As the buoys marking the shoals are often out of position, mariners are cautioned to be on their guard when navigating these shores 75 Imp 72 Clan - What? An update? Never!

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Pie Part of things Bacon pancakes bacon bacon pancakes Posts: 321	weber help Pie @pie
	Jan 31, 2013 15:41:33 GMT Select Post Deselect Post Link to Post Back to Top
	So just go with thats in them at present? Surely what's in at present is way off though - Pump jets and Idle jets should be ok but main jets at 100 i'm not convinced on.
	"Its a small world, but I wouldn't like to paint it" lathamescortmk2 said: if your not about 'show' then WTF is drifting all about?! its marked with scorecards like strictly come dancing FFS ;D ;D

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jrevillug Posted a lot Posts: 3,520	weber help jrevillug @jrevillug
	Jan 31, 2013 15:56:42 GMT Select Post Deselect Post Link to Post Back to Top
	Yeah they're small, but there's no point replacing them twice - once with a guess, and once at the rolling road. Just get it on the RR ASAP, and treat it really gently so it doesn't melt. If you can trailer it there, even better.
	Caution: As the buoys marking the shoals are often out of position, mariners are cautioned to be on their guard when navigating these shores 75 Imp 72 Clan - What? An update? Never!

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westyxflow Part of things Posts: 17	weber help westyxflow @westyxflow
	Jan 31, 2013 20:46:00 GMT Select Post Deselect Post Link to Post Back to Top
	When you say you've taken one of the chokes out and have found 45 written on it - are you sure you're not just looking at the aux venturi? 4.5 would be a common aux venturi size. The main chokes sit behind the aux venturis & should have a marking on them in the 28mm-36mm range. Choke size is the 1st thing to establish & only once you've done that can you approximate what jets to use - the choke size determines the other jet sizes For finding a starting point re jetting, i'd suggest using Dave Andrews jetting program - you can find it on his website here www.dvandrews.co.uk/


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