Full contact vs non contact crank scraper
There are two flavors of crankshaft scraper, the teflon full contact and the metal non contact.
My question; is there proof the full contact makes more power? The fact that it touches the crank makes me think that the less expensive non contact version would be better. I know there is more work involved to trim and adjust it correctly. I have not used them before. Any input would be most appreciated. |
Having not used them either I personally dont think that anyone will see a signifigant difference in any application with a full contact vs non contact.
The extra percent or 2 of gain in the full contact in reduction of oils on the crank will only relate to the same few percent of the power gain from oils on the crank... which i would think would be minimal. |
There is a very significant difference in price. Like almost double.
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Surely some of you guys have some insight on this subject.
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Originally Posted by miata2fast
(Post 1006487)
Surely some of you guys have some insight on this subject.
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Pretty sure this guy is running a I-J scraper.
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Leafy, I would say that is a gross exaggeration. Besides, crank scrapers are used not just on Miatas.
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Originally Posted by miata2fast
(Post 1006490)
Leafy, I would say that is a gross exaggeration. Besides, crank scrapers are used not just on Miatas.
And I know crank scrapers are used on not just miatas but they're very rare here. I'm sure they're really common in the american muscle crowd. |
I have one sitting in the garage for the 1.8 I'm building. I've touched it. That's about the extent of my experience. I did read the directions though. A touchless one sounded easy to install. The teflon scraper one sounded annoying and potentially dangerous to install and tweak. I'd personally go with a touchless one.
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I've got a teflon scraper but had the shop do all the work.
Can't say what difference it makes, I just hope my engine makes more power and lasts longer. Same with ATI damper I got. |
Teflon touch-scrapers are a huge pain in the ass to install.
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Andrew, what makes it so tough? I would like to know what I am getting into.
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It's hours and hours of cut-fit-cut-fit to get it to just rub everything a little bit. It takes goddamn forever and I'm not convinced that it's worth it unless you're building a rules-restricted engine. Putting one on a street car is an exercise in idiocy.
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Hours and hours? Joy.
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Thanks for the heads up, I appreciate it.
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Originally Posted by miata2fast
(Post 1007035)
Hours and hours? Joy.
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What is your prefered method to cut it?
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Ideally, you would use a dremel to contour it, but it makes a huge mess and can't be done anywhere near the engine.
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I will give it a try. Thanks.
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Did you ever move forward with this crank scraper project?
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