1.75" SU on an F-134

[javajeep]

The 1.75" SU carburettor was finally installed on Saturday using a custom made manifold

Still getting the jetting right. It is running lean at full throttle at 2000 plus rpm with accompanying 'crackly misfire'.

In partial throttle operation the F head hums, I was sitting on 3,000 rpm on the tollway on Saturday night and the engine wanted to go harder [this is around 90km/h which is pretty good for an old flatty]

Under-hood space is a BIG PROBLEM - I have lifted the back of the hood to clear the carb so maybe I have the first 'Pro Street' F head Willys. This is temporary as I will increase the body lift from 1" to 2" which will solve the clearance problem.

I have a richer needle somewhere - just have to find it in my tools and assorted spares :(

http://www.imagestation.com/picture/sraid65/p6a7e91afe0e02d63c52174e0d4388610/fbf88bf4.jpg

This pic shows the difference in size between the 1.75" SU and the Solex [measured at 1.25"]. The SU is 2.4 sq ins. venturi and the Solex 1.23 sq ins.

FrankenJeep is a work-horse not a show pony so please excuse the fact that my engine bay [or anything else] is not 'show' standard smile.gif

http://www.imagestation.com/picture/sraid65/pa4cc72265cc4ef0dbf94fa8161e6da3f/fbf87de8.jpg

I just bought a small K&N filter for the breather after the last one disappeared susupected stolen a few weeks ago.

http://www.imagestation.com/picture/sraid65/p856b5f5e013dc938340cf23d88269ced/fbf88b8a.jpg

http://www.imagestation.com/picture/sraid65/pbaa36163cd602ffed5ae403f2ad86e43/fbf88b5d.jpg

http://www.imagestation.com/picture/sraid65/p30e23d13d9bb028310942a53274c19ca/fbf88b21.jpg

[AussieCJ7]

Hey Tony your engine bay looks like a show jeep compared to mine you need more oil I think of it as rust prevention not leaks graemlins/beerchug.gif

hey great work did you notice any more go from this mod ??

It always amazes me how smalll those f heads look

[javajeep]

did you notice any more go from this mod ?? <font size="2" face="Verdana, Helvetica, sans-serif">Yep, and its not jetted properly yet. More pull throughout the whole rpm range and the exhaust note now is great [ I don't run a muffler ] - real crisp

[javajeep]

It always amazes me how smalll those f heads look <font size="2" face="Verdana, Helvetica, sans-serif">Bloody heavy though - around 250kgs - this when REAL ENGINES were made of REAL METAL ! ! !

[javajeep]

Changed the metering needle to an 'SS' now it is running way too rich !

Back to the drawing board ... :?