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Re: carb conversions

To: "George Parker" <ygpz4re@hotmail.com>, spitfires@autox.team.net
Subject: Re: carb conversions
From: Dave Chu <dave@ece.concordia.ca>
Date: Fri, 31 Aug 2001 23:58:10 -0400
In message <LAW2-F78tPLguOi6taa0000baaa@hotmail.com>you write:
>To the lister who wants to change his CD150 for dual SUs (sorry I forgot who 
>it was):  Others may disagree, and I'm always interested in more educated 
>opinions than mine, but if you have a 1500, then SUs from an older, 60's 
>vintage, Spit may not be the best choice.  I think that SUs of that vintage 
>are of the 1 1/4" variety while the euro Spit 1500s with dual SUs had the 1 
>1/2" variety.  Always seemed to me that the smaller carbs would be choking 
>off a lot of the benefit of the larger engine.  Would you want a Ferrari 
>with only one carb (yes, they did make them, but that's not the point 
>here)??

  I would disgree with that.  I have an 78 Spit that had the CD150 and a
  non functioning hot water choke.  After spend around 2 years trying to
  get that setup to run right I got my hands of a dual SU HS2 from a 67 Spit.  

  They needed rebuild and new throttle shafts.  Eventhough the rebuild kit 
  came with the wrong size jets and I wouldn't get then to run properly there 
  was a noticable difference with the HS2's.  The two 1.25" (total of 2.5") 
  SU's breaths much better than a single 1.5" ZS. 

  I have since got the HS2's to run with the correct jets and recently added
  a Lucus Sports coil, it is rocking.  Is not going to out run any of the newer
  cars on the road but it is definitely better that the single ZS.




Dave                                                  |\ |     | |      
_______________________________________/\  /\  /\_____| \|_____| |____________
Dave Chu                                 \/  \/       | /|     | |  
Dept. of Elec. & Comp. Eng.                           |/ |     | |      
Concordia University              Voice:(514)848-3115   Fax:(514)848-2802 
1455 de Maisonneuve W. H961       Email:dave@ece.concordia.ca
Montreal, Quebec, Canada H3G 1M8  http://www.ece.concordia.ca/~dave/addr.html
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