On Topic - Anyone remember reading about, Type IV push rod tube mod. |
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On Topic - Anyone remember reading about, Type IV push rod tube mod. |
SpecialK |
Nov 12 2004, 08:22 PM
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#1
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aircraft surgeon Group: Benefactors Posts: 3,211 Joined: 15-March 04 From: Pacific, MO Member No.: 1,797 |
I can't remember where I read it, and it was several years ago, but someone did a mod on their push rod tubes in an effort to keep the crankcase oil from sloshing into the heads on hard cornering. I think it had something to do with attaching the end of a Type I PR tube to the "case side" of a T4 tube which made it extend farther into the case. This supposedly prevented (to a certain extent) as much oil from entering the heads during a hard cornering, yet still allowed the heads to drain normally.
Anyone heard of, or done this? |
Jake Raby |
Nov 13 2004, 11:07 AM
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#2
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Engine Surgeon Group: Members Posts: 9,398 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
The oil doesn't slosh there... It is delivered there by the ushrods to lube the rockers and valve guides/stems..
Anything you do to the PR tube to retain slosh will also retain oil IN THE TUBES thus keeping it from the SUMP where it can be picked up again and recirculated. even the windage tray does this in stock form and thats why we either don't run it or we heavily modify it. I make tabs that weld to the pick up tube and retain slosh and they work well. I have tubes with these welded on already if anyone wants to try one and see the differences.. On full race engines we weld up the tips of the pushrods, which eliminates oil from passing through them. This keeps them lighter as well as limits the oil getting to the rocker cobers. I then use an external oiling system that taps into the main oil galley and is pressurized to fill the valve covers and lube components. The arrangement allows me to change the amount of oil delivered to the covers easily through Solex main jets that are installed precisely to squirt oil on the valve guides... This works better than anything else I have ever done shy of a dry sump system... |
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