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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: K1nglou on February 19, 2015, 08:50:41 pm

Title: Mec. Fuel pump block off with npt fittings
Post by: K1nglou on February 19, 2015, 08:50:41 pm

Hello I am getting rid of my mechanical fuel pump and saw these block off plates with pipe fittings in them. Any one have an idea why the make these? Thanks

http://m.summitracing.com/parts/mor-65398

Title: Re: Mec. Fuel pump block off with npt fittings
Post by: Captkaos on February 19, 2015, 09:45:00 pm

Notes: Includes 12 AN fitting, which can be used to hook up vacuum pump and gauge or as a drainback location.

If you have a standard SBC, use this:
http://www.summitracing.com/parts/sum-401030/overview/

Title: Re: Mec. Fuel pump block off with npt fittings
Post by: K1nglou on February 20, 2015, 04:42:32 am

Ya I saw that I guess I was just curious for more information like is this a good drain back point for a turbo? Why would you hook a vacuum pump to your crankcase? Is it an alternative to hooking your PCV to the intake? PS I cannot wait for the gauge pods next month!

Title: Re: Mec. Fuel pump block off with npt fittings
Post by: Captkaos on February 20, 2015, 04:54:07 pm

Yes it is a excellent spot for an oil drain back location.

Title: Re: Mec. Fuel pump block off with npt fittings
Post by: Engineer on February 21, 2015, 08:49:34 am

Vacuum pumps are for all out racing. When you need that extra "little bit".

Cost vs. benefit. Is the negative pressure under the pistons and the lightly better ring seal worth the money and the parasitic drag on the crankshaft?