Bogging down in third

[Sunny the Model A]

ok yawl, got the wheels on the truck and am going to adjust the brakes tomorrow as it's raining now. got the truck running and I'll be dammed if it aint running like a sewing machine. no sputter, no backfiring. now this was just sitting in the carport, but my instincts tell me it will run well when I do the test drive. I set the gav between 1/8 and 1/4 turn open and it just purred. I'm thinking that bogging down might have been something clogging the compensator, but we shall see. Fingers and toes crossed. Maybe Sunny is just happy to be running again, who knows.

[Sunny the Model A]

ok yawl, here is the scoop. I got the brakes working and I took it around the block, when the gav was open about 1/8 turn open, and shifted into third at 18, I could firewall the throttle and it pulls firmly, much better than before. after driving a while with temp gauge registering 160-170, it seemed to lose a bit of pep, but that might just be the gav needing a bit of fiddling. now when letting off the gas to shift it still pops a bit in the muffler. so Sunny is still being a Wiseguy. so, tell me, what's up with it?

[1crosscut]

Did you blow out the jets and passages and if you did do you think that this is something that helped?
As far as the popping on deceleration I would suspect a leaky gasket on the intake manifold. Spray some starting fluid all around the gasket mating surfaces of the intake/exhaust manifolds when the engine is running at idle to see if the engine speed changes when doing so. If it does then you have a leaky gasket.

[Sunny the Model A]

i checked em and blew the jets out a bit, and it did seem to help. as for gasket leak, not surprised. my manifolds probable not perfectly flat. so today I'll take em off and file em a bit if need be. let me tell you, going through the brakes entirely is the best decision on that a model one can make. it stops on a dime and gives seven cents change.

[Rob Doe]

Sunny, if you remove the manifolds, lay them on the bench and check for flatness with a metal, straight edged square. Check that the holes are in line. #4 exhaust is often drooped. You'll need a machine shop to fix the flatness unless its a burr or something. My old manifold was drooped front and rear!

[Sunny the Model A]

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Howdy Rob. Well, I got the model a out on the road and gave it the beans a bit and it cruises nicely at 45 now much better than before. I took the manifolds off and measured a 0.004" gap between the intake and exhaust manifolds, so I filed them down by hand and got it to zero. I am a metalworker and had the day off, so I said send it. only bugaboos left in the pickup is lack of a Mitchell and some small things to piddle on. but other than that, it's running well.