Edelbrock carb with oil injection?

Jeff20B · 08-31-2009, 10:56 PM

Racing Beat's Holley carbs have had a nipple for oil injection for decades. Works well enough. The oil doesn't seem to mess up anything.

I'd like to add a nipple to an Edelbrock so I don't have to premix. There is an undrilled vent casting for marine use that I'd like to drill and tap for a nipple. How would the introduction of oil affect the accel pump plunger and other carb seals? Any thoughts?

Sterling · 09-02-2009, 07:14 AM

The oil in earlier Nikkis is pumped directly into the bowls, and the rubber needles didn't seem to be effected.

Jeff20B · 09-07-2009, 02:13 PM

That's true. They did flow oil into the air horn above each float bowl on the old Nikkis. I believe I have a set of old style lines somewhere.

I went ahead and added a nipple to the marine vent casting in the Edelbrock. Unfortunately most of the oil will go to the front rotor because of the way the float bowls are in an Edelbrock It's not a big deal on a Camden because the intermediate ports join just inside the manifold.

If I want to get real anal I'll add a second nipple on the other side of the carb in the other float bowl (something like a 90° street fitting on top or a straight fitting on the side of the float bowl). This guarantees equal oil introduction on both sides of the carb like the old Nikkis.

Jeff20B · 07-14-2010, 12:06 PM

I added a second nipple on the other side like I said I was going to do. Just another straight nipple (no street fitting whatever). The rubber lines already had a nice 90° curve so that took care of that. Seems to work perfectly except the length is pretty long from OMP to top of carb. Might take a few more seconds for oil to flow in, but it is mixed inside the float bowl so there is always some oil in there on startup.

legaleagle · 07-24-2010, 03:09 PM

edelbrock carburetor If oil is mixed in th float bowl, can' something be done about it?

08-31-2009, 10:56 PM	#1
Jeff20B Rotary Fanatic Join Date: Mar 2008 iTrader: (1) Posts: 215 Rep Power: 17	Edelbrock carb with oil injection? Racing Beat's Holley carbs have had a nipple for oil injection for decades. Works well enough. The oil doesn't seem to mess up anything. I'd like to add a nipple to an Edelbrock so I don't have to premix. There is an undrilled vent casting for marine use that I'd like to drill and tap for a nipple. How would the introduction of oil affect the accel pump plunger and other carb seals? Any thoughts?

07-24-2010, 03:09 PM	#5
legaleagle The Newbie Join Date: Jul 2010 iTrader: (0) Posts: 1 Rep Power: 0	edelbrock carburetor If oil is mixed in th float bowl, can' something be done about it? Last edited by legaleagle; 09-08-2010 at 06:45 PM..

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09-02-2009, 07:14 AM	#2
Sterling Premium Vendor Join Date: Feb 2008 iTrader: (2) Posts: 74 Rep Power: 17	The oil in earlier Nikkis is pumped directly into the bowls, and the rubber needles didn't seem to be effected.

09-07-2009, 02:13 PM	#3
Jeff20B Rotary Fanatic Join Date: Mar 2008 iTrader: (1) Posts: 215 Rep Power: 17	That's true. They did flow oil into the air horn above each float bowl on the old Nikkis. I believe I have a set of old style lines somewhere. I went ahead and added a nipple to the marine vent casting in the Edelbrock. Unfortunately most of the oil will go to the front rotor because of the way the float bowls are in an Edelbrock It's not a big deal on a Camden because the intermediate ports join just inside the manifold. If I want to get real anal I'll add a second nipple on the other side of the carb in the other float bowl (something like a 90° street fitting on top or a straight fitting on the side of the float bowl). This guarantees equal oil introduction on both sides of the carb like the old Nikkis.

07-14-2010, 12:06 PM	#4
Jeff20B Rotary Fanatic Join Date: Mar 2008 iTrader: (1) Posts: 215 Rep Power: 17	I added a second nipple on the other side like I said I was going to do. Just another straight nipple (no street fitting whatever). The rubber lines already had a nice 90° curve so that took care of that. Seems to work perfectly except the length is pretty long from OMP to top of carb. Might take a few more seconds for oil to flow in, but it is mixed inside the float bowl so there is always some oil in there on startup.