Crank Scraper crankshaft scraper [Merged 12-6]

[Sinner]

I was wodering if anyone has used one on the 420A. I found one on ebay http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=2412290757&category=6770. From my past expirence with V8's I know they are a good thing to used and gain some people 10-15 horse on a V8, but I have yet to hear anything about them for a four cylinder motor. I plan on replacing my rod bearing cause they went bad and I was wodering if this might be worth my money to put in while I'm there.

 

[siueclipse]

i bought one.. i felt a slight differece.. also.. i created their website.. www.crank-scrapers.com

nothing much cause they didn't want to pay much

 

[supergoat]

Crank scrapers are a good/cheap mod.

 

[burstspeed96]

Any body using crank scrapers? It this gasket style thing that scrapes oil off your crank. Its suposed to help engine longevity and improve power. Could this possibly be a crank walk fixer?

 

[Defiant]

Hm. Not likely, it's mostly intended to keep the crank from windmilling your oil, and get it off the outside of the crank and big ends. I can't see how it would have any effect of crankwalk.

 

[blue1]

Crank scrapers are good if you take the time to make them up. Crank walk comes from three causes that i know of: block not line bored correctly, clutch apply pressure way to big!, and believe it or not your earth straps from battery to body and engine to body missing or damaged! Causes arcing on the sides of the main bearings when you have a great current draw and the battery is looking for the best earth to supply the other side of the 12Volts.

 

[interceptor]

Does any one have it and is it worth getting .
http://www.crank-scrapers.com/products/mitsu.html

 

[97eclipseRS]

what does it do

 

[interceptor]

http://www.crank-scrapers.com/index.html
READ !!!

 

[97eclipseRS]

haha damnit i just got owned like a noob sounds like a good buy, let me know how it is before i drop the 50 bux

 

[interceptor]

Will Do

any one else

 

[Blueheat23]

I dont know about u but just the name scares me....I dont want ANYTHING, scraping my crank. I noticed on there they make one for the 4G37 1.8L, then it says they make one for the 1G 4G63 SOHC engine....there isn't a 4G63 SOHC, that would be the 1.8 4G37. Sorry I'm nit-picky like that.. Interesting concept though, go for it and see what it does...I doubt it would really help performance much, but it's worth a shot.

 

[silvereclipse]

A lot of people are just finding out about these, they have been used in race v8s for a long time with impressive gains. I have heard a few DSM people say they could feel a difference, plus it makes things easier on your engine. BTW the ends of your rods don't actually scrape the piece but come very close. This is to prevent oil from weighing down the rotating peices, less power wasted slinging around oil. I will probably get one for my next oil change.

 

[Defiant]

Originally posted by 97eclipseRS
what does it do

It's an odd-shaped piece of sheet metal cut to _almost_ touch the crank and rods on the "coasting" side of the assembly, and it wipes most of the oil from the rotating bottom end. This cuts down on windage and oil whipping, and has a very slight effect of reducing rotating mass. There are stories of V-8 research engines with windows and monitors sailing golf-ball sized clumps of oil around in the crankcase when wound up- there's a helluva wind going on inside there with those big ends whizzing around at a bazillion miles an hour. Once you've gotten every last tenth of a horsepower out of a motor, you have to look for the last lurking strays from the herd.

Of course, you also have to be aware the trail's well-salted with horseshit.

 

[rookieupgrade1]

Originally posted by Defiant
Of course, you also have to be aware the trail's well-salted with horseshit.

If you have your engine maxed out in its potential power you MAY have a minimal gain with one. I'd save my $ and buy a part that makes a diffeance and has less theory to its HP gain.

 

[Kevin Johnson]

SOHC 4G63 came in the 89-92 Galant. I pulled a motor myself to check it out and compare it to the G63B and 4G63t 1g of the same vintage.

A retired Chrysler engineer who worked on the 2.2 Shelby Charger engines reported that Chrysler and Mobil did joint research back in the mid 1980s on windage losses for that engine. (This is the gentleman who made aftermarket racing oil pans for several years for the Shelby racers -- no, he said that he does not want to get back into that -- I asked).

They picked up 7 hp at 6000 rpm and 9 hp with Mobil-1 using a crank scraper type windage tray. It is difficult to get this kind of info because it is circulated within the car companies but not available to the general public.

Hope that info helps!

Kind regards,

Kevin Johnson
Ishihara-Johnson Crank Scrapers

 

[Daedalus]

A lot of the honda guys that are all-motor here in omaha run them and swear by them. If your gonna take off the oil pan might as well get some hp for your efforts. A+ to crank scrapers!

 

[DongeR]

I’ve heard crank scrapers before and...
How close are they supposed to be to the crank? I heard a car making more audible noise with it on. Is that normal?

 

[Daedalus]

Most likely the noises werent from the crank scraper. It comes close to the crank, but doesnt touch it, therefore it should be silent. The noise was probably something else, and if it was from the scraper, its not installed correctly and should be checked.

 

[interceptor]

Thanx Kevin Johnson for the crank scraper.

 

[SnoopySLR]

I don't know if I want metal that close to my crank. Does anyone have one of these? I need to drop my oil pan soon cause my gasket has a leek. Just wondering if its safe. Last thing I need is the thing to move and start scrapping against my crank.

 

[JWoodley]

tried and trusted...

 

[Defiant]

I don't know if I want metal that close to my crank. Does anyone have one of these? I need to drop my oil pan soon cause my gasket has a leek. Just wondering if its safe. Last thing I need is the thing to move and start scrapping against my crank.

It'll only move if your block flexes. Such as when being use to stop a freight train. "Close" doesn't matter. "Touching" does.

 

[deeeep]

for those who have one what are your thoughts

 

[Cesar]

What exactly is a crank scraper?