Recommendations for carb balancing

Hi all,

Hope to get the description right but i want to have a go at balancing the carbs on my '74 2200TC, any recommendations for what is the best tool for measuring each carb with the airbox removed? And of course what will fit between the carb inlet and inner wing.

Thankyou

Adrian
 
Hi, As you say there's not a lot of room between the carbs and the inner wing, some more expensive ones are a bit bulky. For years I've used a Gunson carb balancer, they might look a bit cheap and cheerful but they do the job. A cheaper and still effective is just a length of ¾" hose held between the inlet and your ear but it takes a bit of practice, the Gunson gives a visual indication.

Colin
 
I use one of these on my V8 and get really good results. I don't know if you will have rom though?

s-l1600.jpg
 
Hi, As you say there's not a lot of room between the carbs and the inner wing, some more expensive ones are a bit bulky. For years I've used a Gunson carb balancer, they might look a bit cheap and cheerful but they do the job. A cheaper and still effective is just a length of ¾" hose held between the inlet and your ear but it takes a bit of practice, the Gunson gives a visual indication.

Colin
Thankyou for the advice
 
I also use the unisyn on my '68 2000 TC. I have 2" HD8 carbs, so use a short piece of 2" rubber hose in the carb inlets to clear the studs on the carbs. That still leaves plenty of room to work between the carbs and the inner wing.
 
I also use the unisyn on my '68 2000 TC. I have 2" HD8 carbs, so use a short piece of 2" rubber hose in the carb inlets to clear the studs on the carbs. That still leaves plenty of room to work between the carbs and the inner wing.
Thankyou
 
Many years ago I used to balance the carbs on my 2000TC by listening through a hose at each inlet and adjust them until the sound identical. It is actually quite an accurate way to do it, and you can tell if it is right by just giving the engine a rev to see if it seems lagging as it revs up or is quick to respond. My real reasoning was that I couldn't afford any trick gadget to do it with of course but it is quite a satisfying process!!
 
Decibel meter. Does not affect the airflow, can be just poked down from the top at the same place for each carb, and is more consistent than the ear hiss test but doing exactly the same thing. And you get an actual number.
 
Not on my Rover, as its a single carb, but on my MG with twin SU HS4 carbs, I used the Gunsons balancer. The carbs stayed in tune unless I did something to them, but nonetheless, a quick check was my annual thing. Then after removing them for a head gasket replacement, I was damned if I could find the device! So did it by a tube in ear - less faffing. Then it turned up a week later - checked against my 'ear device', spot on. Thereafter, any adjustments were balanced by tube in ear - at first I'd check with the Gunsons (as I doubt myself to be competent), then consigned the Gunsons to a drawer. Found 'earballing' to be quick and accurate even for a amateur like myself.

Nonetheless, the Gunsons device was a nice simple and cheap thing that worked. I get help here on this site for free, so as 'pay it back along the line', if anyone wants a Gunsons balancer, let me know and I'll send it on, no use to me now, no more faffing with twin carbs you see, as I had to say goodbye to the MG to get the Rover (and yeah, I still miss it - 16 years of driving that MGB GT car everywhere, wish I could have both but neither garage space, time allocation nor wallet were big enough sadly).
 
Many years ago I used to balance the carbs on my 2000TC by listening through a hose at each inlet and adjust them until the sound identical. It is actually quite an accurate way to do it, and you can tell if it is right by just giving the engine a rev to see if it seems lagging as it revs up or is quick to respond. My real reasoning was that I couldn't afford any trick gadget to do it with of course but it is quite a satisfying process!!
I am all for "do it yourself" approaches but the Unisysn is very compact and inexpensive at approximately $30 USD so I went the easy route on a balancer.
 
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