Mardman

mine is orange - that bright orange that only datsuns can do :classic:

Thnaks, that is really great info. the reason I am rplacing the 38's is because of a vacume leak at the throttle shaft. I am assumming it is wear on the shaft. I know ztherpy can fix them, but replacement with these seemed less expensive.:nervous:

Thanks, that was the info i was looking for. I actually pulled the covers and pistons out to look at the throttle plates because i couldn't get a good look at them with a mirror. I think I am going to try new gaskets on the spacer plates and try again. I don't beleive that a vacuum leak at the plates should would caus this problem, but I want to get these guys on the car again and see.

Thanks for the suggestion. I had tried that, and it did not help. I even looked inside to see if the throttle plates were closed - they were. :disappoin I did reuse the old spacers that came with the carbs (yes I did rebuild the carbs before I put them on). I am wonderiing if a vacume leak at the spacer plates could cause this, or as I stated earlier, could the larger ventrui size be the cause?

The linkage was correct and the springs engaged. could it be that they are just too big? my Fairlady engine is only 2000cc.

linkage was correct and the springs engaged. could it be that they are just too big? my Fairlady engine is only 2000cc.

I am trying to use a pair of SU from a 240 Z to replace the ones that came on my Fairlady Z (1970). After I had them bolted up the car was hard to get started, but once it did it ran like it was at WOT. I tried backing off everything, but it didn't help. :disappoin Does any one know what may be the cause, and how to overcome it?