crank scraper?
Mar 12, 2003 | 06:25 PM
#1
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From: Olympia, WA
crank scraper?
does it look likes its worth -+50$? check it out comments? ideas? intresting enough of a theory...not too sure about actual performance, though..
Mar 12, 2003 | 07:16 PM
#2
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From: Colorado Springs
I'm laughting as I read...
That is much harder than it sounds. If you have IFS dropping the oilpan is slightly harder than pulling out your own teeth.
That "cloud of oil" it claims to catch is there for a reason, to oil the bottom half of the engine.
As the engine rotates, engine oil is not thrown off but instead sucked into a tornadic windage cloud around the crank and rods: the horsepower that is required to move and move through that oil is significant. The scraper strips away that cloud by coming close to – but not touching – the spinning crank and connecting rods and this frees up that internally consumed horsepower.
Installation instructions are included. The scraper simply bolts in place in between the block and oil pan.
The next time you change your oil, simply drop the pan and install the scraper.
You do not need to buy two pan gaskets but rather only a tube of good quality RTV silicone gasket maker to apply to both sides of the scraper. The scraper is constructed from 12 gauge mild steel (approximately .10”). Some minor clearancing might be required which can be accomplished with a simple hand tool like a good metal file (the mild steel is easy to work with).
Installation instructions are included. The scraper simply bolts in place in between the block and oil pan.
The next time you change your oil, simply drop the pan and install the scraper.
You do not need to buy two pan gaskets but rather only a tube of good quality RTV silicone gasket maker to apply to both sides of the scraper. The scraper is constructed from 12 gauge mild steel (approximately .10”). Some minor clearancing might be required which can be accomplished with a simple hand tool like a good metal file (the mild steel is easy to work with).
That "cloud of oil" it claims to catch is there for a reason, to oil the bottom half of the engine.
Mar 12, 2003 | 07:37 PM
#3
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From: Olympia, WA
hehe...tornadic windage 
....sounds like something bill and ted would say after letting one rip haha....seriously though, it looks like the only thing that it prevents from getting oil is the pan itself...plus, im interested in just how MANY dragsters and hi-po vehicles use this...ive never even HEARD of it..
....sounds like something bill and ted would say after letting one rip haha....seriously though, it looks like the only thing that it prevents from getting oil is the pan itself...plus, im interested in just how MANY dragsters and hi-po vehicles use this...ive never even HEARD of it..
Mar 12, 2003 | 08:25 PM
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From: Colorado Springs
Dragsters and most racecars use dry sump lubrication to squirt oil in crucial spots instead of splashing oil everywhere. Those motors get torn down after every run to examine and replace worn parts.
The oil splashing around is what keeps you from having to rebuild your motor every week.
The oil splashing around is what keeps you from having to rebuild your motor every week.
Mar 13, 2003 | 06:59 AM
#5
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From: Towson, MD
Originally posted by jx94148
That "cloud of oil" it claims to catch is there for a reason, to oil the bottom half of the engine.
That "cloud of oil" it claims to catch is there for a reason, to oil the bottom half of the engine.
Windage trays (a similar product that seperate the crankshaft from the oil pan using baffles or screens) are stock on some performance engines from the factory.
Sep 24, 2004 | 03:57 AM
#6
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Crank scrapers really do work...
Yes, you are correct.
Actually many engines come stock from the factory with crank scraper devices in addition to a windage tray. (BMW, Nissan, DaimlerChrysler, Ford, Mazda, etc.)
We have posted some dyno results on our site for the little 993cc Metro engine. Even with a full windage tray it picked up an average 3% hp and power increased from roughly 2750 rpm through 5300 rpm.
A local builder of 22R engines for trucks really likes our scrapers -- if anyone wants to contact him send us an email.
Kind regards,
Kevin Johnson
Ishihara-Johnson Crank Scrapers
Actually many engines come stock from the factory with crank scraper devices in addition to a windage tray. (BMW, Nissan, DaimlerChrysler, Ford, Mazda, etc.)
We have posted some dyno results on our site for the little 993cc Metro engine. Even with a full windage tray it picked up an average 3% hp and power increased from roughly 2750 rpm through 5300 rpm.
A local builder of 22R engines for trucks really likes our scrapers -- if anyone wants to contact him send us an email.
Kind regards,
Kevin Johnson
Ishihara-Johnson Crank Scrapers
Originally Posted by FattyCBR
Actually that's not completely true. The "cloud of oil" is oil that is whipped up by the rotation of the crankshaft and actually serves no purpose. All the cloud does is resist the motion of the crank and wastes HP. Once that oil is off the rotating assembly it's done it's job.
Windage trays (a similar product that seperate the crankshaft from the oil pan using baffles or screens) are stock on some performance engines from the factory.
Windage trays (a similar product that seperate the crankshaft from the oil pan using baffles or screens) are stock on some performance engines from the factory.
Sep 24, 2004 | 05:27 AM
#7
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From: Montreal, QC Canada
The higher the engine revs the more rotating mass becomes a factor (which is why all dragsters run them) so any standard piston engine that does not have a scraper will likely pick up some HP by adding one, how much will vary quite a bit.
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