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SN95 Cobras
Converting from EFI to Carb on my '94 Cobra - Need Intake and Carb suggestions ASAP!
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<blockquote data-quote="SVTCobra306" data-source="post: 8092114" data-attributes="member: 19605"><p>Air Gap FTW... </p><p></p><p>With your setup I would go with an Air Gap and either a Holley HP 650 carb or a Quick Fuel 650 mechanical secondary. Call and talk to QFT, very knowledgeable folks there, you won't be disappointed!! The ProForm is OK but for a little more money you can do better. Demon hasn't impressed me lately. </p><p></p><p>For the intake, do some searching around on the 'net. Usually it is used to baseline against the big intakes (victor, parker, etc) but it usually actually beats them to 6000, sometimes even 6500... Unless you are going north of that and never below 4000 you will come out better with the air gap. </p><p></p><p>Don't forget you have to change your fuel system. You might get away with one of the conversion regulators for a while, but what you need is a lot of fuel volume at low PSI (7-8ish). Something like a holley black and an 8an feed will get you a long way... </p><p></p><p></p><p>Honestly it sounds like a nice fat wire (12 gua. minimum) from the engine mount bolt on the block side to the frame would probably cure your woes.. I fought this late last year and was pulling my teeth out too. I didn't have a racing season looming, but I was losing time working on my race car and was getting frustrated. I was convinced that the ground on the timing cover was adequate. I upgraded it to 10 guage and the condition improved temporarily then returned. Mine was a tad different, mine would idle but with a miss, was OK part throttle but shit itself when you loaded the car. I put in new O2 sensors, replaced the TFI module to no avail. In the end all it took was replacing the burnt ground wire from the motor mount bolt to the front stub rail. I put one on each side to make me feel better <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /> the wire was free after all..</p></blockquote><p></p>
[QUOTE="SVTCobra306, post: 8092114, member: 19605"] Air Gap FTW... With your setup I would go with an Air Gap and either a Holley HP 650 carb or a Quick Fuel 650 mechanical secondary. Call and talk to QFT, very knowledgeable folks there, you won't be disappointed!! The ProForm is OK but for a little more money you can do better. Demon hasn't impressed me lately. For the intake, do some searching around on the 'net. Usually it is used to baseline against the big intakes (victor, parker, etc) but it usually actually beats them to 6000, sometimes even 6500... Unless you are going north of that and never below 4000 you will come out better with the air gap. Don't forget you have to change your fuel system. You might get away with one of the conversion regulators for a while, but what you need is a lot of fuel volume at low PSI (7-8ish). Something like a holley black and an 8an feed will get you a long way... Honestly it sounds like a nice fat wire (12 gua. minimum) from the engine mount bolt on the block side to the frame would probably cure your woes.. I fought this late last year and was pulling my teeth out too. I didn't have a racing season looming, but I was losing time working on my race car and was getting frustrated. I was convinced that the ground on the timing cover was adequate. I upgraded it to 10 guage and the condition improved temporarily then returned. Mine was a tad different, mine would idle but with a miss, was OK part throttle but shit itself when you loaded the car. I put in new O2 sensors, replaced the TFI module to no avail. In the end all it took was replacing the burnt ground wire from the motor mount bolt to the front stub rail. I put one on each side to make me feel better :) the wire was free after all.. [/QUOTE]
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Converting from EFI to Carb on my '94 Cobra - Need Intake and Carb suggestions ASAP!
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