Newbie with 38mm SU's in need of local help

[mazdax605]

Hey guys,

I am new here,and this is my first post. I live in Massachusetts,and own a 78 Datsun 510 that I upgraded to 38mm round top SU carbs. The car is now running,but one carb is running richer than the other one,and I have turned in the large nut on the bottom of that one very much,and the plugs on those two cylinders are still sooty,and darker than the rear two which seem pretty good. I have the Z-therapy video,but I am still lost. Anyone in the New England are willing to come help me out? I know this isn't a Z-car,but it has to be pretty much the same. Thanks in advance.

Chris

[Bruce Palmer]

Chris,

Pull the float bowl lid off the offending carb and take the brass float out and shake it to maje sure it's dry. These dirty buggers have a nasty habit of developing tiny hairline cracks take on gas and sink like a rock allowing the float bowl to over fill and run rich rich rich. We sell composite floats....

[mazdax605]

What are the chances I can reuse the float bowl gasket?If they are slim like I think can I just buy the gaskets instead of buying a whole rebuild kit? I may end up buying the kit anyway,but it isn't in the budget yet,so I will wait.

If the floats are cracked would I be getting fuel over flowing through the bowl vent though? What would you guy recommend doing with the float bowl vents? When I thought about using the stock SSS air filter I got with the carbs the float bowls had a tube coming off them to the base of the filter assembly,but now I am using custom made individual filter,and I am not sure what to do with the bowl vents.

I know I have spoken with you on the phone Bruce. I bought some carb base gaskets,air filter gaskets,and the DVD through you.

[Bruce Palmer]

With the floats sinking, you most definitely run the risk of gas over flowing out the vents due to the fact the needles and seats are never closing because the floatrs, partially full of fuel, will never get high enough to shut them off.

Chances are better than even the the float bowl lid gaskets will turn into potato chips once you take the lids loose. We sell 'em for $2 each. Composite floats are $19.50 ea.

It's a pretty easy deal to drill a hole in the backing plate of the aircleaner and run a short length of gas line from the nipple on the float bowl lid and seal it into the hole on the backing plate. Once you get the float thing solved the puking problem should go away.

Edited July 17, 2009 by Bruce Palmer