Crank Scrapers

Jakey · 12-05-2004

Today I was reading on Tuners about a gentleman's engine buildup which consists of a crank scraper. Had anyone used a crank scraper on their DSM? His crankscraper was homemade: http://www.dsmtuners.com/forums/showthread.php?t=151866
I went to crankscraper.com and found this list of benefits which makes sense:

Quote:

· Less rotating mass for the engine to accelerate because of the removed oil

· Less loss of power because of excessive drag caused by the windage cloud

· Helps reduce engine damaging oil-foaming

· Helps avoid oil starvation by keeping the oil in the pan during hard braking and turning as well as during off-road driving

· Helps to cool critical engine parts by quickly returning heated oil to the sump

· Helps to prevent the cylinder walls from being overloaded with oil

· Can help with fuel efficiency

Granted I just read about this today but initially I don't see any downfalls to running a crank scraper besides the cost.

Super Bleeder!! · 12-05-2004

SRT4s have them stock

Raptor · 12-05-2004

We are going to be manufacturing them vary shortly, I have run them in many engines in the past and all have benefited. We have a couple motors we are doing next that will be getting them as well. They are a good idea and really how can you lose, it is all scavenged power, low cost and while being a bit of a PITA to setup correctly, are pretty solid once they are done.

joem · 12-05-2004

Plus when your motor starts walking, it will hold it in place like a leash.
joe

Jakey · 12-05-2004

Does anyone know if Hill is running one with his setup?
http://www.teamnabr.com/cgi-bin/ulti...=004035#000000

**link doesn't work without a NABR account.**

FattyBoomBatty · 12-08-2004

Quote:

Originally Posted by joem

Plus when your motor starts walking, it will hold it in place like a leash.
joe

that's what i was thinking

i bought one for my conquest motor, and he was extremely ill fitting, so i threw it away. i mentioned that on starquestclub.com and the guys who made it, sent me another one for free. i don't understand. anyway, by that time i had my motor installed and wasn't about to take it apart again for a scraper that may not have worked.

i still have it in my room.

Raptor · 12-08-2004

Hey, bring it down if you would, I wouldn't mind comparing designs and we might as well improve on the G54b models that are currently available as well.

**Goat Blower** · 12-08-2004

Why don't you just ask me? :-) I'll be running one on my new motor for next year.

Steve

Quote:

Originally Posted by Jakey

Does anyone know if Hill is running one with his setup?
http://www.teamnabr.com/cgi-bin/ulti...=004035#000000

**link doesn't work without a NABR account.**

Raptor · 12-08-2004

Wrong Hill, I think he means the fast one hahaha

**Goat Blower** · 12-09-2004

Quote:

Originally Posted by Raptor

Wrong Hill, I think he means the fast one hahaha

Hmmm, why then is a NABR post that I started referenced?

Raptor · 12-09-2004

NABR? who reads that? I didn't look. Maybe he did mean you, so does that mean you don't believe you are the fast hill?

Jakey · 12-09-2004

Quote:

Originally Posted by Raptor

NABR? who reads that? I didn't look. Maybe he did mean you, so does that mean you don't believe you are the fast hill?

Yep, I meant Steve.

Raptor · 12-15-2004

To get back to this, I have a design finalized now. The scraper is part of a full length windage tray. They will be made from aluminum and since being mounted to the mains rather than the pan rails, should be much easier to install than others on the market. I will get pics up when the first prototypes are done. One other note, the design has the scraper mounted tangent to the crank rotation to make more of a chisel effect on the oil. The standard design has the scraper mounted perpendicular to the crank which while directing oil off the crank can also direct oil into the crank. If any one has any questions, let me know.

**Shane@DBPerformance** · 12-15-2004

Quote:

Originally Posted by Raptor

If any one has any questions, let me know.

When do I get my 7-bolt one? Bahahaha

7-bizolt-4-lyfe

Raptor · 12-15-2004

You like that leash idea Joe mentioned don't you. You guys seriously need more ventilation in that shop, the exhaust fumes from the constant dyno use are killing your brain

**Shane@DBPerformance** · 12-15-2004

Yea, I just can't keep mine from crankwalking or get them to make any damn power! Now go make me a 7-bolt crankscraper, I need to stay 100whp ahead of everyone else.

Raptor · 12-15-2004

Never mind about the ventilation thing, after your last comment, I see it's already too late.

Raptor · 12-15-2004

Of course I am kidding in the above comments. Your 7 bolt is performing very well.

That does make me think of something else that may not be too obvious to people. We run a lot of 2G oil pickups on our engines for a few reasons, they are stronger and a dented pan is less likely to cause siphon issues with the oil. The thing that I want to make sure people realize is that the 2G uses a short windage tray factory, the reason would be to keep oil in the sump for the different pickup design. I am sure there is not typically an issue with a 6 bolt using the 2g pickup without the tray, I don't know of any issues that have been directly tied to it anyway. However, I do think it would be a wise thing to add to a 6 bolt using a 2G pickup for that reason in addition to the other benefits mentioned.