Question about ARP Studs

gkz

Well-known member
Joined
Jun 19, 2008
Messages
105
Location
Wake Forest, NC
I ordered studs for SBC w/windage tray. The OEM tray uses only three studs (on the mains). The kit includes 5 long studs; where do the other 2 go? Thanks

OEM:
oemwindagetray.jpg

ARP:
arpmainstuds.jpg
 
32250
32250.gif


THE "DIAMOND STRIPPER" WINDAGE TRAY
The most sophisticated windage tray available today! This exclusive Milodon design features hundreds and hundreds of small louvers that quickly scavenge oil from crankshaft rotation, but prevents reversion common to screen-type windage trays. This is a completely finished, gold irradiated part that does not require additional fitting. And it flat works! Extensive dynometers and on-track testing verifies that Milodon "Diamond Stripper" windage trays out-perform all other screen type trays on the market.
These trays will fit both the Small Block Chevy 350 and 400 main cap bolt pattern. They will also fit right and left hand dipstick engines, as when adjusted properly the dipstick will pass underneath the tray.


32640.gif

32640, #32645

CRANKSHAFT SCRAPER
Additional "free" horsepower can be found by the installation of a crankshaft scraper. A scraper will remove any excess oil left on the crank & rods that the windage tray does not remove. Scraper requires fitting to individual crank and rod profile, as well as to engine stroke. Wiper should be fitted to within .045" from rods and .035" from crank counterweights. When installed, scraper is sandwiched between pan rail and block.
Small Block Chevy 32640

the combo of these two components and an oil pan similar to this

31510.GIF

will provide better oil control
 
How do these parts scrape the oil off the moving parts,they don't actually touch the crank assy do they ?????
something my motor probably could take good advantage of,i would like to replace the stock pan with a good one some day.
 
Grumpy,

What do the scrapers bolt to? The pan rails?

they either bolt to the block,between the oil pan gasket and the pan or you can weld them to the oil pan rail, on the oil pan,most guys braze or J&B EPOXY THEM TO THE OIL PAN RAIL,on the oil pan, no they don,t touch the rotating assembly, you place them and carefully trim them, durring the engine assembly process, so that while you spin the rotaing assembly the teeth miss the outer arc of the rotation by about 1/8" and they are placed on the side of the engine that sees the rotation upwards from the sump, the idea is to restrict oil flow from the sump following the spinning assembly around in the lower block, it helps skim away and restrict oil falling from the upper engine, to remain in the sump area of the oil pan, after the crank assembly sweeps it into the sump.
that way almost all the oil makes only a 100-250 degree trip around with the spinning crank a single time, before being forced back into the oil pan.

its NOT installed and used as a source of potentially gaining hp as much as it is a way too insure a steady flow of oil to the oil pump, but it tends to reduce pumping losses that dragging oil around with the rotating assembly can produce.
 
Last edited:
Grumpy,

What do the scrapers bolt to? The pan rails?

they either bolt to the block,between the oil pan gasket and the pan or you can weld them to the oil pan rail, on the oil pan,most guys braze or J&B EPOXY THEM TO THE OIL PAN RAIL,on the oil pan, no they don,t touch the rotating assembly, you place them and carefully trim them, durring the engine assembly process, so that while you spin the rotaing assembly the teeth miss the outer arc of the rotation by about 1/8" and they are placed on the side of the engine that sees the rotation upwards from the sump, the idea is to restrict oil flow from the sump following the spinning assembly around in the lower block, it helps skim away and restrict oil falling from the upper engine, to remain in the sump area of the oil pan, after the crank assembly sweeps it into the sump.
that way almost all the oil makes only a 100-250 degree trip around with the spinning crank a single time, before being forced back into the oil pan.

its NOT installed and used as a source of potentially gaining hp as much as it is a way too insure a steady flow of oil to the oil pump, but it tends to reduce pumping losses that dragging oil around with the rotating assembly can produce.

Ahhhhhh that makes since,thanks for the explanation Grumpy
 
Top