57 Nomad Project

[dhutton]

Originally Posted by kwhizz

Well !!!!..........I got another education today..........Got a call this morning at the shop from Coy........an Engineer from Holley........He wanted to know what and how everything transpired in my Dilemma...So.....I explained everything to him and how I felt the "O" ring was the cause of the issue.........O.K...He said !!.......I explained how I measured the tube and it was the same size as the Holley tube and since they were the same size I concluded that the smaller "O" was the issue.........He then asked if I still had the GM pick-up tube and was it tapered.........In my mind I was thinking a lead in style taper, .....And I measured the end and it measured .875 the same as the Holley tube........So....I told him I had it at home and I could measure it again and send him the info..........Humm!!!........When I get home I figured this was a waste of time, but.....I get it out and look at it a little

Wow.......Look at this .....When I looked at it originally the "O" Ring was on and I didn't notice the recessed taper area that the "O" ring sat in.........Hummm!!!!.........I called Coy back and explained what I found and what he already knew.........


When you measure the minor diameter and add the size of the larger "O" Ring vs the .875 dia of the Holley straight tube and the smaller ring.....The compression for the seal is exactly the same.........So.....My conclusion that the "O" ring was the problem was not correct........Holley had it figured out dimensionally correct........Sheesh !!!.......All that work for nothing.......but.......I still don't understand exactly what the issue was......So......Right now I have the larger "O" compressed into a space it really wasn't designed for......and......when I was talking to Coy I spun the engine over........"0" oil pressure.......Spun it over for about 20 seconds and Boom 50 lbs pressure.........So......If you have installed one of these pans.....don't worry about it.........Man.....what an Idiot .........This car stuff is hard............

And...........Congrat's to Holley for the follow up to bring that part of the issue to a logical conclusion...

Maybe a pickup girdle would help:

http://www.ebay.com/itm/BRP-LS-Engin...NWFVkv&vxp=mtr

Don