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What a crank-scraper is and other technical info... Some comments on our products...
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We will try to keep this list updated but if you do not see your engine listed here please ask!  We can provide templates for initial fitting and adjustment. Templates cost $100 and are a separate charge from the scraper pattern chosen.

We have included some representative pictures of the scrapers we make.  If you would like to see a picture of a particular scraper please ask -- we would be more than happy to send one through.

When available (please enquire) our zero-clearance Teflon® scrapers run an additional $130.00 to the cost of the standard steel scraper unless noted.

Remember, your vehicle may have an engine made by a different manufacturer so check both product lines.  If you are still unsure, please contact us.

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ALLPAR.COM can help you with loads of information about your Mopar!

Here are some links of both discussions and articles written by Mike Holler.  He has some really interesting ideas regarding how to make more power without radical modifications.


Performance oil pump modifications for the Slant Six

First, read this technical article:


One thing this article does not address is the aeration of the oil.  The gerotor designs of the pumps (both the cloverleaf and star gear pumps are gerotor designs) have some elements that help to reduce aeration and entrainment of actual bubbles in the oil as well as possible cavitation damage.

The passages or cavities in the pumps allow the changing volumes in the pumps to communicate with each other.  In doing so they allow free air in the oil to transfer backwards and be worked more gradually into the oil whether by dissolution or entrainment.  The pressure relief bypass back into the low pressure side of the pump makes it more efficient with respect to the volume of oil needed to feed it, directly from the sump.

The modifications in the picture below introduce a dedicated deaerator circuit into the pressure cavity.  The small amount of oil and large amount of gas allowed to be bypassed back into the sump area performs a useful secondary function by oiling the pump drive gear.  This additional oil will help with the known camshaft and pump drive problems.  By allowing much more entrained gas to escape more quickly from the internals of the pump the shock loads to the gears and their loading areas will also be reduced. 

Copyright 2002-2023 © All rights are reserved on our product designs -- a great deal of hard work goes into each one.

Teflon® is a registered trade mark of E.I. du Pont de Nemours and Company. Only DuPont makes Teflon® resin sourced by Ishihara-Johnson Crank Scrapers from authorized DuPont licensees.

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Jean-Claude 1919-2003
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