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Crank Scrapers: Are they worth it?

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Old Mar 24, 2015 | 02:26 PM
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Default Crank Scrapers: Are they worth it?

Any independent information on them?

Type of engine, power level, before and after measurements of power and other possible parameters..

Also, what ways can oil spray/vapor/whatever one would like to call it be condensed to get it in the pan more quickly?
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Old Mar 24, 2015 | 02:54 PM
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I think studderin put one on his car and found 6whp. So i would say they are worth it if you would get that same result.
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Old Mar 24, 2015 | 03:26 PM
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I'd say if your in there it wouldn't hurt, but not worth tearing into the motor just for that
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Old Mar 24, 2015 | 03:46 PM
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Originally Posted by maroonls1z
I'd say if your in there it wouldn't hurt, but not worth tearing into the motor just for that
im putting together a shortblock.

if it works it works. another aspect id like to know is with the added power, how much did efficiency increase? the last one is getting the oil vapor to condense to get it to drop.
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Old Mar 24, 2015 | 04:15 PM
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I'm getting ready to put my motor together as well and will be installing a crank scraper from Improved Racing. Every little thing helps,imo.
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Old Mar 25, 2015 | 07:14 AM
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With lower RPM stuff it won't really have much impact, but if you're in the middle of a build, there is no downside to adding one.
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Old Mar 25, 2015 | 12:33 PM
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Most of our customers are seeing an increase in horsepower of around 1.5-2.0%. The scrapers also help reduce oil aeration and starvation.

Here's a dyno chart that New Era Performance posted of their Camaro, before and after adding the scraper, with no other changes:





Improved Racing crank scraper dyno chart
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Old Mar 25, 2015 | 02:41 PM
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Originally Posted by ImprovedRacing
Most of our customers are seeing an increase in horsepower of around 1.5-2.0%. The scrapers also help reduce oil aeration and starvation.

Here's a dyno chart that New Era Performance posted of their Camaro, before and after adding the scraper, with no other changes:


http://cimg2.ibsrv.net/gimg/ls1tech....c75c5a5e61.jpg


Improved Racing crank scraper dyno chart
I trust you... but i want to verify with as many others as possible.

with the decreased drag and better oil control.. what sort of BSFC gains have you seen?
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Old Mar 26, 2015 | 12:42 PM
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Originally Posted by Wnts2Go10O
I trust you... but i want to verify with as many others as possible.

with the decreased drag and better oil control.. what sort of BSFC gains have you seen?
I absolutely agree with looking at results from independent customers. We don't really even like to make claims, we'd rather other people post up their actual results.

Good question, that isn't something we've looked at. Logically there should be an improvement in fuel economy, but it may not be measurable. Maybe someone will chime in with what they've experienced.
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Old Mar 26, 2015 | 12:49 PM
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Originally Posted by ImprovedRacing
I absolutely agree with looking at results from independent customers. We don't really even like to make claims, we'd rather other people post up their actual results.

Good question, that isn't something we've looked at. Logically there should be an improvement in fuel economy, but it may not be measurable. Maybe someone will chime in with what they've experienced.
you have a pm.

if one is getting close to 2% hp gain with a less than 500hp engine.. it might be negligible but still measurable.
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Old Mar 26, 2015 | 12:59 PM
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Originally Posted by ImprovedRacing
Most of our customers are seeing an increase in horsepower of around 1.5-2.0%. The scrapers also help reduce oil aeration and starvation.

Here's a dyno chart that New Era Performance posted of their Camaro, before and after adding the scraper, with no other changes:





Improved Racing crank scraper dyno chart
Improved Racing,

Getting ready to pull the trigger on some oil cooler stuff from you and I want to get the scraper. I know its still fairly new for the 4" stroke LS but has anyone test fit it to Compstar crank and rods yet? Probably one of the most run rotating assemblies out there so would be good to get confirmation. Thanks.
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Old Mar 27, 2015 | 01:00 PM
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Originally Posted by tadams72
Improved Racing,

Getting ready to pull the trigger on some oil cooler stuff from you and I want to get the scraper. I know its still fairly new for the 4" stroke LS but has anyone test fit it to Compstar crank and rods yet? Probably one of the most run rotating assemblies out there so would be good to get confirmation. Thanks.
We haven't heard from anyone who installed it with a 4" Compstar crank yet, which is usually a good thing because it most likely means if anyone did use it, then they didn't have any issues.

Maybe someone who's tried it will post up!
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Old Mar 27, 2015 | 02:19 PM
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Does the 4" scraper work with a ls7?
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Old Mar 27, 2015 | 04:08 PM
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Originally Posted by ImprovedRacing
We haven't heard from anyone who installed it with a 4" Compstar crank yet, which is usually a good thing because it most likely means if anyone did use it, then they didn't have any issues.

Maybe someone who's tried it will post up!
Well damn it I guess I'll have to be the guinea pig then.
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Old Mar 27, 2015 | 08:26 PM
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There is a good bit of trimming for the compstar set up, where the rods pass through
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Old Apr 1, 2015 | 03:39 PM
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Originally Posted by HioSSilver
Does the 4" scraper work with a ls7?
Needs modification to fit LS7 block, 4" crank, and titanium rods.

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Old Apr 1, 2015 | 06:33 PM
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What kind of mods? About to pit it on mine?
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Old Apr 1, 2015 | 07:58 PM
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I got one. With the Scat 6.1" 'stock replacement' rods, a little filing for clearance has to be done. The big ends are a nice bit wider than the stockers.
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Old Apr 2, 2015 | 01:20 PM
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Originally Posted by maroonls1z
What kind of mods? About to pit it on mine?
Inner stud holes do not line up, center crank throws (#3 main) contact scraper, need extra clearance for rods on the passenger side. Driver side clears rods OK.
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Old Apr 2, 2015 | 08:40 PM
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Ordered mine today for a 427 LS3 build using Compstar crank and rods. As soon as it and the short block show I'll see what I am dealing with.

Improved Racing what is the recommended minimum clearance to all rotating parts?
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