Fuddle Racing Converters
Staging Lane
Joined: Jul 2004
Posts: 54
Likes: 0
From: Central cali.
I really question the quality of Fuddle converters.
When I recieved my Fuddle HP/street it had helicoils (sp?) in all 3 of the mounting holes. A brand new converter with a billet front cover with repaired mounting holes.
Anyone else's fuddle show up like that? When I questioned it I was told it was a non issue because they had that same converter behind 1500hp motors in dragsters. 
Long story short, the fuddle never made into my car and now I have a Yank.
When I recieved my Fuddle HP/street it had helicoils (sp?) in all 3 of the mounting holes. A brand new converter with a billet front cover with repaired mounting holes.
Anyone else's fuddle show up like that? When I questioned it I was told it was a non issue because they had that same converter behind 1500hp motors in dragsters. Long story short, the fuddle never made into my car and now I have a Yank. Trending Topics
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15-20% is excessive and soemthing we have not seen. Have you checked all other factors? What stall speed are you getting out of it now? We would be happy to restall and can move to a more efficient stator setup for you.
As to the brazed fins, we do hand braze our turbine fins; you aren't seeing the whole picture with the outside row. That is the area that takes the abuse, hence Yank's double wall and our metallic backbone.
As to the brazed fins, we do hand braze our turbine fins; you aren't seeing the whole picture with the outside row. That is the area that takes the abuse, hence Yank's double wall and our metallic backbone.
You have to look at what slip %, in the context of
where. Especially on a low-STR converter you will
see a long transitional region where you have the
torque multiplication declining toward 1:1 and the
slip RPM staying relatively constant or declining as
well. Some of the slip is not inefficiency, but fluid
torque multiplication.
Yank's tech pages have a good illustration of this
characteristic.
Raw slip numbers can only show you a minimum,
not necessarily true delivered efficiency because
power out the back is TQ*RPM and any residual
torque multiplication is a bonus, one that's not
observable with scan tools unfortunately.
By 6000RPM my 3500/2.0 is slipping only 5%. But
lower down it slips much more, as does every other
converter I've been able to acquire scan data for.
If you post a log or Excel file I can put yours up
against the others for comparison. Noting the mods
or HP/TQ numbers would be helpful for context, that
stretches the slip RPM.
where. Especially on a low-STR converter you will
see a long transitional region where you have the
torque multiplication declining toward 1:1 and the
slip RPM staying relatively constant or declining as
well. Some of the slip is not inefficiency, but fluid
torque multiplication.
Yank's tech pages have a good illustration of this
characteristic.
Raw slip numbers can only show you a minimum,
not necessarily true delivered efficiency because
power out the back is TQ*RPM and any residual
torque multiplication is a bonus, one that's not
observable with scan tools unfortunately.
By 6000RPM my 3500/2.0 is slipping only 5%. But
lower down it slips much more, as does every other
converter I've been able to acquire scan data for.
If you post a log or Excel file I can put yours up
against the others for comparison. Noting the mods
or HP/TQ numbers would be helpful for context, that
stretches the slip RPM.
Another key to analyzing slip is to know when the converter is designed to couple up. A converter designed for 7000 rpm shifts may show a lot of slip at 5500 rpm and doing its job perfectly.