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ALB
Samba Member
Joined: August 05, 2008
Posts: 3483
Location: beautiful suburban Wet Coast of Canada
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 Posted: Fri Jul 26, 2019 8:14 am Post subject: Kadron horsepower limit? |
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As the title asks, anybody know much power Kadrons are capable of- with 28mm venturis? with 30 mm venturis? Thanks! Al
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On a lifelong mission to prove (much to my wife's dismay) that Immaturity is Forever!! |
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74 Thing
Samba Member
Joined: September 02, 2004
Posts: 7390
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Bugsy61
Samba Member
Joined: March 20, 2011
Posts: 256
Location: Peoria, Illinois
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| Posted: Fri Jul 26, 2019 1:24 pm Post subject: Re: Kadron horsepower limit? |
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| If you put enough cam in to make power, Kadrons don't idle very well. Not a problem for a race engine, not to good on the street. If you put a cam in that idles decent, won't make a whole lot of power. That is the problem with Kadrons. |
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Alstrup
Samba Member
Joined: July 12, 2007
Posts: 7213
Location: Videbaek Denmark
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| Posted: Fri Jul 26, 2019 5:10 pm Post subject: Re: Kadron horsepower limit? |
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Yes, Kads can support A LOT of power if you do it right. But as said, if you want a decent idle and lower rpm behaviure you need to chose the cam and set up very carefully.
Jeff @ Kaddieshack did a nice test and write up on the importance of stacks and air cleaner choice here: http://kaddieshack.com/aircleanerdyno.html
He used 44´s for that test.
The out of the box 40 mm Kads will support about 100 hp in a decent set up.
The limitations of the Kads is not the carburettor as such, its the manifolds. They are horrible for any serius performance. Back in 2014 I built a 2110 type 1 with a Web 218/119 cam, ported heads, 40 x 35 mm valves, 9-1, 1,25 rockers etc etc. I used 40 Kads with 34 mm venturies and modded for SVDA run by a Mallory Hyfire CDI. I took a set of stock manifolds and had a friend to weld a full 0,3" on to them, so I could make the manifold shape I wanted. I invested about a days worth of porting and modifying the manifolds. it runs stock type air cleaners, but I also cut up up a set of stacks and had them protrude a little over 1½" into the filter. I also lifted the carburettors ½" with an extension between the manifolds and the carbs. The end result was a Kadron fed engine that ran very reasonable at idle (975 rpm) and went like a bat out of you know where right off idle. The engine pulls a very solid 135 hp at 5500 rpm.
I´m sure they will support 140 hp with more cam and CR. But this is a street driven engine. |
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