Dual Weber carb question

[rich280zxt]

Can the linkage for the stock S.U. carbs on a 240z be used with Dual Weber Carbs, or do I need to get a different linkage set up?? If so, where can I get the linkage for a decent price?

Thanks

[SHO-Z]

On my 260Z the webers were made for the Z conversion. I only had to cut and modify the bell crank on the fire wall.

 

If you have round top SUs I would not bother with the webers. The SUs are a better set up.

[Pop N Wood]

You will need the linkage between the two carbs that was made for the webers. Once you get that going you can hook to the stock stuff at the firewall. The stock stuff that connects to the SU carbs will not work with the webers.

[rich280zxt]

You will need the linkage between the two carbs that was made for the webers. Once you get that going you can hook to the stock stuff at the firewall. The stock stuff that connects to the SU carbs will not work with the webers.

 

okay thats all I needed to know thanks!

[rich280zxt]

So are these http://cgi.ebay.com/ebaymotors/DATSUN-240Z-260Z-280Z-INTAKE-MANIFOLD-SU-CARBS_W0QQcmdZViewItemQQcategoryZ38634QQihZ013QQitemZ230176093606QQrdZ1QQsspagenameZWDVW

better than these:

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&ih=006&sspagename=STRK%3AMEWA%3AIT&viewitem=&item=160163635497&rd=1

[Pop N Wood]

So are these http://cgi.ebay.com/ebaymotors/DATSUN-240Z-260Z-280Z-INTAKE-MANIFOLD-SU-CARBS_W0QQcmdZViewItemQQcategoryZ38634QQihZ013QQitemZ230176093606QQrdZ1QQsspagenameZWDVW

better than these:

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&ih=006&sspagename=STRK%3AMEWA%3AIT&viewitem=&item=160163635497&rd=1

 

 

That weber set doesn't appear to have all the pieces. That is the sort of thing that will drive you crazy trying to piece down.

 

The trouble with used SU's is the throttle shaft bushing are usually worn out. That is a fairly pricey thing to fix right. So unless they have been rebuilt by Z Therapy, then buyer beware.

 

There are a lot of opinions on both carb set ups. I started out with SU's, but switched to webers cause I could buy a complete set up for the cost of getting the SU's rebuilt. The dual weber set up was also smog legal in California where I lived at the time.

 

The webers are nice carbs and have a lot of tuning options. They also have accelerator pumps so the car is easier to start in cold weather. But IMO they suffer from that J bend in the intake manifold. Other than getting rid of the vacuum leaks, I didn't see a noticable improvement in performance over the worn SU's. But then again my engine had minimal upgrades over stock.

[rich280zxt]

That weber set doesn't appear to have all the pieces. That is the sort of thing that will drive you crazy trying to piece down.

 

The trouble with used SU's is the throttle shaft bushing are usually worn out. That is a fairly pricey thing to fix right. So unless they have been rebuilt by Z Therapy, then buyer beware.

 

There are a lot of opinions on both carb set ups. I started out with SU's, but switched to webers cause I could buy a complete set up for the cost of getting the SU's rebuilt. The dual weber set up was also smog legal in California where I lived at the time.

 

The webers are nice carbs and have a lot of tuning options. They also have accelerator pumps so the car is easier to start in cold weather. But IMO they suffer from that J bend in the intake manifold. Other than getting rid of the vacuum leaks, I didn't see a noticable improvement in performance over the worn SU's. But then again my engine had minimal upgrades over stock.

 

So then why are the duals so much more expensive??

[Pop N Wood]

They didn't use to be. When I bought mine the full kit was about $600. That was only $50 more than a carb shop wanted to rebuild the SU's with new throttle shaft bushings.

 

You ought to be able to find a complete used set without much trouble. I have a set I would gladly box up and ship for $400. Not sure if I still have the manual but the linkage is all in place.