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Old 25-05-2020, 09:56 AM   #11
keekster64
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Originally Posted by breamster View Post
Thanks for all the replies and sorry for not replying sooner - life keeps getting in the way of old cars!

Currently I have 160 airs, 130 mains, 50 idles, 50 pump jets and f6 emulsion tubes.

I know the carbs are a bit big for the little engine. There is method in my madness for fitting them. Ultimately I will source a 1600 (or bigger) to put in it when funds and time allow.

I have replaced the pistons and barrels on engines way back when I used to be into VW 20 years ago to increase capacity to 1600. On both occasions I blew the bottom end within months. I'm reluctant to change them on this engine without getting it fully rebuilt.

I have removed the electric pump as I was never happy with it. It just looked messy and made annoying noises. I've reinstated the mechanical fuel pump and have a filter king to fit when I get five minutes. I'll hopefully get it fitted at some point today and try it.

I also have some 55 idles jets to try. I did have 55s on it initially but it was suggested they were too big so I tried the 50s. It does seem to be when you transition from idles to mains.

I did also wonder about the advance and tried revving without the vacumm connected and had the same issues.

I did follow wayoutwestie's guide and derived the jet sizes from his recommendation for 1600s and other sources. It seems that mains for 1600 seem to run between 130-145 so I went with 130 for my 1300.

I'll see how I get on today and report back. Fingers crossed.
The airs should be 150 if your running 130 mains according to the wayoutwestie web site.
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Old 25-05-2020, 11:01 AM   #12
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The airs should be 150 if your running 130 mains according to the wayoutwestie web site.

The good news is that I've just fitted the regulator, pump and 55 idles and it appears to be running well!! Test drive to follow later. I just need to clean the dust off the car first so I can see where I'm going.

I had seen that about running 150 airs but I've ordered a pair and will see if they make a further improvement.

I'm not going to call it fixed yet but I'm optimistic!!

Thanks everyone for their help so far. I appreciate it.
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