MGB Heat shield for Weber DOCE - to reduce vapor lock
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- เผยแพร่เมื่อ 11 ก.ย. 2024
- Apparently I am missing a phenolic spacer for this DCOE setup.
In this video, I attempt to minimize exhaust manifold heat causing Vapor Lock.
#mgb #customcars #DCOE #classiccars #restomod #britishsportscar #Vaporlock #fuelsystem #heatshield
Hi Alex. I have a 79 MGB with a Weber DCOE and had the same issue. The answer is not phenolic spacers or heat shields, it's technique. During a hot start hold the pedal to the floor while cranking. Don't pump it! It will start right up.
Since the temp at the thermostat is around 190 degrees, it is just a guess that you have a 190 degree thermostat. I wonder what a summer thermostat of 160 degrees would do? I have a 180 degree thermostat and the temp around each spark plug is about 180 +- 10.
Hmmm...
Interesting thought.
Might have to give that a try at some point
save yourself the headache and put a dual su carb setup on it, superior to the oe single carb setup on the 77 and without the headache of the webers
I do have a pair or SU carbs. I am not done having fun with the Weber yet.
Sir: I found your interesting clips. I have a 1977 MGB and I need to get some work on it and want it back on the road. I found some pin holes in the driver side floor pan, and car has been sitting in a long time. I noticed you mentioned you are in Virgina. Do you know anyone in the Fredericksburg area that works on these cars. I do have some mechanical experience on Older Mustangs and Camaros
I am in Texas (Dallas area) I follow a bunch of Facebook forums, I will look out for anyone in that area.
Also, you might google "mgb experiance " that is am excellent online forum
This is also a problem with the (dreaded) Weber downdraft carb.
Well, in my next video on this, I will be testing Phenolic spacers. Turns out they are hard to find. So I am going to make my own out of Bakelite. Hope it works. And benefits others too
@@AlexPlatacis Good luck.
The problem with the downdraft is that if you put a phenolic block/spacer in between the carb and the manifold... it can't be thick enough to do any good.
It will cause the top mounted air filter to hit the underside of the hood/bonnet.
I do not like the Downdraft Weber. It is inefficient.. prone to vapor lock, and very difficult to properly tune without a dyno and a sack of jets.
I bought my recent car, 63 B, with the Weber.
Luckily I have a complete set of SUs already built up, a manifold. and a new heat shield.
All ready to install it.
I also have a few DCOE 45s and manifolds... for another day and maybe another car.
I plan to test the effectiveness of different thicknesses of bakelite. Hopefully it will just take 1/4 inch or so.