RPM of engine

[Shaggy]

Ok I guess I need a tachometer, I need to set my carb up and I want to get the ideal at about 800-900 RPM so I need something to help me, has anyone got any advice on a cheap good tachometer to use

 

[Clarkson46]

How about something like these. Depends on how much you want to spend.

http://www.maplin.co.uk/search.aspx?MenuNo=11809&MenuName=Engine+Analyser&worldid=-8&FromMenu=y&doy=6m6

 

[Shaggy]

Thats the one I was looking on Maplins as well and couldn't find anything, thank you

 

[froggy]

I've got one of these meters, saves a hell of a lot of guess work and as it fits onto the igntion leads its right in front of you making setting up the revs, dwell etc a 1 man job

 

[Shaggy]

I am sold then, thank you

 

[CJ70westy]

i did this job at the weekend when i fitted my new dizzy. I borrowed a snap-on strobe with inbuilt tach.
Problem i had was my engine wont idle that low. With exactly 7.5deg at idle and 30deg total advance i can only get my engine to idle at around 1050 rpm. Do i need to adjust the carb to suit the dizzy?

 

[Shaggy]

What dizzy do you have

 

[CJ70westy]

Bosch 0231 170 034. Basically the same as a VW 905 205 with vac advance. How did you get on with setting your rpm that low?

 

[Clarkson46]

You don't say what carb you have. Read this link it will give you the general idea of the tune up proceedure.

http://www.vw-resource.com/34pict3.html

 

[CJ70westy]

some good info there thanks! Ive got the 34PICT/3