TonyCo Posted July 14, 2015 Share Posted July 14, 2015 Hi everybody,I'm a little confused with my carbs on my GT6 MkII 1970. I had CDSE which I removed because I didn't want to have the emission control temperature "thing" which in my opinion is adding more trouble to a simple carb. So I purchased a recon set of 150 CDS. My question is do I need the insulators and gaskets (carb to manifold) with or without the cut out ? And what happens if you use the ones without the cut out, this is what I currently do . Cheers,Tony Quote Link to comment Share on other sites More sharing options...
gt6power Posted July 14, 2015 Share Posted July 14, 2015 I think the cutouts are so air can be drawn/let back in the diaphragm chamber and allow the piston to move up down relative to inlet pressure and the piston spring . I could well be wrong though as i have not looked at any for ages. Look at the carbs and you should be able to tell if you want the cut outs or not. Quote Link to comment Share on other sites More sharing options...
Steve AKA vitessesteve Posted July 14, 2015 Share Posted July 14, 2015 If your carb looks like this the upper rectanglar hole above the main one lets air under the diaphragm. Quote Link to comment Share on other sites More sharing options...
ivangt6 Posted July 14, 2015 Share Posted July 14, 2015 I accidently fitted the insulator the wrong way on my car, blocking the hole off and it ran like a pig! stumped me for a while. I cant think what its for without looking at it but I'd guess at it having something to do with the choke? I'd stupidly sold my CDSE's as I took the car off the road for a while and had some HS6's to go back on it for when I found time to getting round to sorting its many issues. I kept the original manifold though and in the end decided against the HS6's for now and found the above carbs from a 2000. They run perfect after a rebuild and I've found them easier to set up than the CDSE's. Quote Link to comment Share on other sites More sharing options...
TonyCo Posted July 15, 2015 Author Share Posted July 15, 2015 Thanks guys I'm going to take them off once more and take some pics of the manifold side and post them.Tony Quote Link to comment Share on other sites More sharing options...
byakk0 Posted July 15, 2015 Share Posted July 15, 2015 If your CDS carbs have the bypass valve, you'll need the gasket with the cutout, otherwise, you won't need it.AFAIK, the manifold is the same for 150CD, CDS, and CDSE Quote Link to comment Share on other sites More sharing options...
TonyCo Posted July 19, 2015 Author Share Posted July 19, 2015 Here they are, so what do you think, cut out or not cut out ? Quote Link to comment Share on other sites More sharing options...
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