Club 80-90 Forums

I'm sure Bubba is running a bit rich so I want to tweak the carb.

Is it worth getting a Gunson analyser? I mean if I take it to be done at a garage how likely is it that it will need doing again in the near to medium future? I also want to check the timing so the same question regarding a timing light?

Cheers in advance!

Maybe on the first. Definitely yes on the second. Some people can tell if an engine is running rich by how "fluffy" it sounds. If you think you can tell the difference between a fluffy & non-fluffy engine you don't need a gas analyser.
Actually now I think about it you don't necessarily need a timing gun. How fast can you blink?

I have been given a gas analyser. Just gotta work out how to use it on the LPG!

ermie571 wrote:I have been given a gas analyser. Just gotta work out how to use it on the LPG!

I'll show ya! be down in 2 weeks (ish!)

Cheers Boxy, off to get myself a timing light then! Any must haves or will a basic one do? Advance? Rev counter??

Are you talking about a gunson co meter
if you are thats only for idle
its not the same as anlysing the exhaust while the engine is at speed or under load

Yes, that's the one. Is there no point in the Gunson? Should I just take it to a pro to tune the carb and save myself the 80 quid?

Gunson is good for getting through mots but if your carb is running rich its not going to help
Probably a fault in the carb

The way a carburettor works means that common adjustments to the mixture and air by-pass screws only really effect the mixture at idle.
Overall mixture (off idle driving, which is 90% plus of the time) is controlled by fixed sized jets within the carburettor body and are not usually messed about with unless significant modifications are made to the engines fuel demands ie: it is tuned with increased power output.
Sure it's useful to be able to adjust the idle mixture for MOT but for what its worth, a trained ear can get pretty close without the expense of a meter.

Martin