showa Posted July 25, 2010 Share Posted July 25, 2010 I'm somewhat new to these motors and noticed in an earlier thread there was mention of motorcycle carbs.... I searched but found no definitive info or links to other sites that address this... My question is, does anyone have experiance with motorcycle carbs using the stock manifold or custom setups ??? Curious as to experiances on street/ track cars... I'm planning on running street/auto-x and a rare track day with my L28 powered 240Z... Thank you all in advance for your input... I have learned alot from lurking on this forum already... Quote Link to comment Share on other sites More sharing options...
john turner Posted July 26, 2010 Share Posted July 26, 2010 research Vintage Performance on web.......they're utilizing Mikuni HSR motorcycle carbs as Skinner's Union replacement and more. If my SU's were not working so well(Z Therapy rebuilds). I'd be interested. Regards, John T. Quote Link to comment Share on other sites More sharing options...
showa Posted July 26, 2010 Author Share Posted July 26, 2010 Thanks for the reply John.... If you do go that way someday, I would like to hear of your results... I am somewhat suprized that there is so little info on this site about this subject... With the vast array of experiances on this board it seems to be a modification that would have caught some attention... Quote Link to comment Share on other sites More sharing options...
T-Bone028 Posted July 26, 2010 Share Posted July 26, 2010 (edited) I think the reason why most people dont have more detailed info on this is because we have so many other options available that have been tested over the years. Triple carb setups accomplish the same thing (for the most part) but have a larger knowledge base and off the shelf availability. But if you are still curious, try giving this a read. I dont recall if the slide carbs are from a motorcycle, but it is interesting nonetheless. http://www.viczcar.com/member-rides/eiji-hosomis-datsun-240z Edited July 26, 2010 by T-Bone028 Quote Link to comment Share on other sites More sharing options...
showa Posted July 26, 2010 Author Share Posted July 26, 2010 T-Bone028, thanks for the link... I saw a picture of his engine somewhere but never saw the info on it.... Quote Link to comment Share on other sites More sharing options...
junglist Posted July 27, 2010 Share Posted July 27, 2010 The guy that runs datsunspirit.com has motorcycle carbs on his Z. Quote Link to comment Share on other sites More sharing options...
Gareth. J. Posted August 16, 2010 Share Posted August 16, 2010 (edited) Hey Guys, I'm a newby from Australia. I have six 42mm Kiehin bike carbs on my L28 240z, I chopped up an old su manifold and welded 40mm aluminium tube to it on a spare cylinder head to get the angles correct. They have been on for 2yrs without needing to be balanced at all, knife edged shafts from the factory 42mm all the way through. Was fairly easy and cheap, around $500 aus all up. Edited August 16, 2010 by Gareth. J. Quote Link to comment Share on other sites More sharing options...
Gareth. J. Posted August 16, 2010 Share Posted August 16, 2010 It was a little time consuming to get it sorted, but they run like a dream and start instantly usind the original choke cable. Quote Link to comment Share on other sites More sharing options...
Tony D Posted August 16, 2010 Share Posted August 16, 2010 The Mikuini and Weber PHH44 and DCOE45's are used on Harleys, does this make them motorcycle carbs as well? Quote Link to comment Share on other sites More sharing options...
showa Posted August 17, 2010 Author Share Posted August 17, 2010 Looks good Gareth.......... How does the performance compare to other carb combinations ??? Quote Link to comment Share on other sites More sharing options...
Gareth. J. Posted August 17, 2010 Share Posted August 17, 2010 Thanks, Not too bad for DIY carbs. I was running triple Dellortos, the bike carbs have way more torque down low, great throttle response, top end and all round driveability than the old setup did. I need some work done to the P90 head to see how they really go, atm it's an original F54/P90, 72deg cam, with extractors... Haven't been on dyno but it's reasonably quick, funny thing is I always seem to want more power. The linkages are great after the first balance it has been set and forget, bit of fidling with 9 changes in jet sizes. They are from 1999 Honda blackbird, which was the fastest production bike in the world when released. Hopefully some off that speed is in my Z now Quote Link to comment Share on other sites More sharing options...
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