We are currently running on the new domain and server: www.Speed-Talk.com

IMPORTANT: Update your bookmarks to https://www.speed-talk.com/forum/
(Right-click the URL and select "Bookmark this link")

Oil pressure vs volume

General engine tech -- Drag Racing to Circle Track

Moderator: Team

Kevin Johnson
HotPass
HotPass
Posts: 8685
Joined: Tue Nov 22, 2005 5:41 am
Location:

Re: Oil pressure vs volume

Post by Kevin Johnson » Thu May 21, 2020 1:04 pm

You just need to put some fine directional screening over that area. If you measure the box and approx. size of the sump well I will make you something (no charge).

A few years back, Yves had a similar issue.

PM me the measurements and your address.

Steve.k
HotPass
HotPass
Posts: 1346
Joined: Sat May 28, 2016 10:41 am
Location:

Re: Oil pressure vs volume

Post by Steve.k » Thu May 21, 2020 1:21 pm

Ok thanks Kevin I’ll get measurements later today. Im more than happy to pay you for your help and expertise.

piston guy
Expert
Expert
Posts: 898
Joined: Mon Sep 10, 2012 1:55 pm
Location: Anaheim, CA

Re: Oil pressure vs volume

Post by piston guy » Thu May 21, 2020 4:05 pm

Steve I use two cover plates on my pumps as a dormer Ford engineer told me they found as the pressure increased , the cover would flex and bleed off pressure. Simple virtual no cost and I did see better pressure because of it. I do it to all of my pumps ( even aluminum ) except obviously those with a lower bearing and 429-460 "cover feed" pumps.

allencr267
Member
Member
Posts: 177
Joined: Wed Nov 07, 2012 6:28 pm
Location: Tallahassee Florida USofA

Re: Oil pressure vs volume

Post by allencr267 » Thu May 21, 2020 4:41 pm

piston guy wrote:
Thu May 21, 2020 4:05 pm
...the cover would flex and bleed off pressure.
Thanks.
Super duper helical gotta be more, the reason some swear HV's necessary? :wink:

tuffxf
HotPass
HotPass
Posts: 247
Joined: Wed Dec 20, 2006 7:34 am
Location: Central Qld Australia

Re: Oil pressure vs volume

Post by tuffxf » Thu May 21, 2020 4:43 pm

Been running the two cover plates on mine forever as well, good thing.
Steve have you verified lifter to lifter bore clearances?
Correct me if I’m wrong, this engine of yours would it be the first one that is up and running with any real dyno time on it?
Cheers

allencr267
Member
Member
Posts: 177
Joined: Wed Nov 07, 2012 6:28 pm
Location: Tallahassee Florida USofA

Re: Oil pressure vs volume

Post by allencr267 » Thu May 21, 2020 4:47 pm

F'up blanked

Steve.k
HotPass
HotPass
Posts: 1346
Joined: Sat May 28, 2016 10:41 am
Location:

Re: Oil pressure vs volume

Post by Steve.k » Thu May 21, 2020 4:57 pm

tuffxf wrote:
Thu May 21, 2020 4:43 pm
Been running the two cover plates on mine forever as well, good thing.
Steve have you verified lifter to lifter bore clearances?
Correct me if I’m wrong, this engine of yours would it be the first one that is up and running with any real dyno time on it?
Cheers
I’ll confirm that got to get to my notes. Yes very first one. Approximately 50 dyno runs now.

tuffxf
HotPass
HotPass
Posts: 247
Joined: Wed Dec 20, 2006 7:34 am
Location: Central Qld Australia

Re: Oil pressure vs volume

Post by tuffxf » Thu May 21, 2020 5:38 pm

Thats cool! :)
Be interesting to see how it turns out bottom end wise, your the test pilot!
Do they have an oiling diagram for these or is it identical to 351w
Cheers

Steve.k
HotPass
HotPass
Posts: 1346
Joined: Sat May 28, 2016 10:41 am
Location:

Re: Oil pressure vs volume

Post by Steve.k » Thu May 21, 2020 7:58 pm

They are identical. Lifter bore looks to be a smidge over .001.

tuffxf
HotPass
HotPass
Posts: 247
Joined: Wed Dec 20, 2006 7:34 am
Location: Central Qld Australia

Re: Oil pressure vs volume

Post by tuffxf » Thu May 21, 2020 8:22 pm

ok thanks,
A smidge over .001, is that measured ?
Must be similar to a mick hair! :D

Steve.k
HotPass
HotPass
Posts: 1346
Joined: Sat May 28, 2016 10:41 am
Location:

Re: Oil pressure vs volume

Post by Steve.k » Thu May 21, 2020 9:36 pm

Gets above 1.5 i get worried. Anything in between good.

Steve.k
HotPass
HotPass
Posts: 1346
Joined: Sat May 28, 2016 10:41 am
Location:

Re: Oil pressure vs volume

Post by Steve.k » Thu May 21, 2020 10:03 pm

Just pulled some rod bearings to check all perfect after 27 pulls on dyno.

tuffxf
HotPass
HotPass
Posts: 247
Joined: Wed Dec 20, 2006 7:34 am
Location: Central Qld Australia

Re: Oil pressure vs volume

Post by tuffxf » Thu May 21, 2020 10:33 pm

very good!

Steve.k
HotPass
HotPass
Posts: 1346
Joined: Sat May 28, 2016 10:41 am
Location:

Re: Oil pressure vs volume

Post by Steve.k » Thu May 21, 2020 10:36 pm

piston guy wrote:
Thu May 21, 2020 4:05 pm
Steve I use two cover plates on my pumps as a dormer Ford engineer told me they found as the pressure increased , the cover would flex and bleed off pressure. Simple virtual no cost and I did see better pressure because of it. I do it to all of my pumps ( even aluminum ) except obviously those with a lower bearing and 429-460 "cover feed" pumps.
Never heard that before Randy. I could try it. By the way your pistons worked awesome in this unit. Thanks again.

Steve.k
HotPass
HotPass
Posts: 1346
Joined: Sat May 28, 2016 10:41 am
Location:

Re: Oil pressure vs volume

Post by Steve.k » Fri May 22, 2020 12:50 pm

0E04B4CE-5EBD-4C7E-8928-5824038A7512.jpeg
9872C155-7790-41D2-A1E8-1543F8638FFF.jpeg
DE0CF5F3-D54A-4027-88EF-FE86728920AD.jpeg
Excuse dirty pan. Everything going in parts washer shortly.
You do not have the required permissions to view the files attached to this post.

Post Reply