2056 spark plug gap, 40 Dell's, Jacobs energy box, Bosch blue coil, C30 cam,Bosch SVDA Dizzy |
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2056 spark plug gap, 40 Dell's, Jacobs energy box, Bosch blue coil, C30 cam,Bosch SVDA Dizzy |
914rat |
Jun 22 2020, 12:22 PM
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#1
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Member Group: Members Posts: 279 Joined: 3-July 06 From: Maryland Member No.: 6,362 |
Trying to tune my 914 that has been asleep in my climate controlled garage for 10 years. runs good in the upper rpm range but shitty at lower range. What gap should I use on NGK BR6ES plugs? 40 Dell's, Jacobs energy box, Bosch blue coil, C30 cam,Bosch SVDA Dizzy?
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anderssj |
Jun 22 2020, 06:56 PM
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#2
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Dog is my copilot... Group: Members Posts: 1,663 Joined: 28-January 03 From: VA Member No.: 207 Region Association: MidAtlantic Region |
After you do the plugs, check the idle jets. Dell idle jets tend to get blocked. Even a partial block on one idle jet will cause problems, especially in the RPM range you mentioned (up to 2200 or so).
One other thing I notice with my car (also with Dells) is that when summer get here, it starts running a little rich and I need to lean the idle mix out just a little, about 1/4 turn "in" on each of the idle adjustment screws (#62 in the picture). You'll see if you're running rich when you pull the old plugs. (NOTE: 1/4 turn is approximate, once you're done be sure to check the color of the new plugs to make sure you don't end up too lean--YMMV, other standard disclaimers apply). Air density decreases as temperature and humidity increase, so warmer weather is just like gaining altitude and a carb'ed car will run richer. The effect is most noticeable at low RPM (e.g. like when pulling away from a full stop, especially if going up a hill). On my car, the engine even sounds a little different--boggy/lopey, and kind of fat, like when it's up in the mountains. Hope this helps! |
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