Edelbrock carb with OMP?
05-23-04, 02:08 AM
#1
Edelbrock carb with OMP?
Anyone here using an Edelbrock with the oil metering pump?
I looked at the vacuum advance nipples on the carb today and believe the 'always on' (always sucking) nipple would be great to hook an OMP line to. It makes more sense than the 'timed' vacuum advance nipple since its port is above the throttle plate.
Anyone ever done this before?
By the way, Dan Atkins sets his OMP to the 9 o'clock position on his supercharged FB. Mine will be set to 9 too.
I looked at the vacuum advance nipples on the carb today and believe the 'always on' (always sucking) nipple would be great to hook an OMP line to. It makes more sense than the 'timed' vacuum advance nipple since its port is above the throttle plate.
Anyone ever done this before?
By the way, Dan Atkins sets his OMP to the 9 o'clock position on his supercharged FB. Mine will be set to 9 too.
05-23-04, 10:05 AM
#2
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on the holley i had for a bit, there were npt barb fittings tapped in to the sight holes on each float bowl. i just hooked the omp lines to it and it worked well.
05-23-04, 12:37 PM
#3
Yep, my DP Holley is like that, I think. I'd have to dig it out of the box (it needs a rebuild). Since I think it's been modded by Racing Beat, and they didn't seem to have any matching numbers, I don't know which rebuild kit it needs.
As for where to plumb the OMP line, I thought about using a T fitting inline with the incoming fuel, but realised it'd be under pressure. The float bowls aren't under pressure, but Edlebrock doesn's have easy access like the Holleys do. Then I used a high-brightness LED to see if the vacuum nipples simply were straight through into the carb throat, and that's what they looked like. Then I tried compressed air and couldn't tell if it was going anywhere other than through the tiny slits in the throats of the barrels. One slit is above (timed) and one is smaller and below (full suck).
Hmm, I guess since the carb is going on a plenum style manifold, it doesn't really matter which barrel the OMP line gets hooked to since all the apex seals should get almost equal amounts of oil. Even though the slit is smaller below the throttle plate (butterfly valve or whatever it's called?) than the other one that's above, it'll be under constant vacuum and therefore shouldn't matter. The OMP emits very little oil per minute; I think it will be ok.
Thoughts?
As for where to plumb the OMP line, I thought about using a T fitting inline with the incoming fuel, but realised it'd be under pressure. The float bowls aren't under pressure, but Edlebrock doesn's have easy access like the Holleys do. Then I used a high-brightness LED to see if the vacuum nipples simply were straight through into the carb throat, and that's what they looked like. Then I tried compressed air and couldn't tell if it was going anywhere other than through the tiny slits in the throats of the barrels. One slit is above (timed) and one is smaller and below (full suck).
Hmm, I guess since the carb is going on a plenum style manifold, it doesn't really matter which barrel the OMP line gets hooked to since all the apex seals should get almost equal amounts of oil. Even though the slit is smaller below the throttle plate (butterfly valve or whatever it's called?) than the other one that's above, it'll be under constant vacuum and therefore shouldn't matter. The OMP emits very little oil per minute; I think it will be ok.
Thoughts?
Last edited by Jeff20B; 05-23-04 at 12:40 PM.
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