| Author | Message | ||
| Mitchell Minh Le (Yelcab1)
Member Username: Yelcab1 Post Number: 326 Registered: 11-2001 |
Thanks Peter. The 640x640 ricture esolution just does not do the engine justice. All the hoses are fresh, the gas tanks have been repainted, the valve covers have been repainted with wrinkle paint, the engine and heads and bell housing have been ... rub-and-buffed (thanks Magoo), and the timing covers have been silverpainted. Plus, the car is running great. Took it out for another evening drive last night and it just purred like a big cat when I came back into the garage. I know there are several issues that will come up eventually but I am happy to drive it for now until it breaks in some. | ||
| '75 308 GT4 (Peter)
Intermediate Member Username: Peter Post Number: 1978 Registered: 12-2000 |
That is spectacular Mitch!! Excellent work!!!  | ||
| Steve Magnusson (91tr)
Member Username: 91tr Post Number: 990 Registered: 1-2001 |
I always found it not too difficult to use the "lean cut out" method to set the 308 carb mixture screws: 1. Close the mixture screw (the cylinder will miss and the RPM will drop a bit). 2. Slowly open the mixture screw until the cylinder starts to fire -- usually you can tell just by the sound/RPM (should be 3~4 turns +/-) 3. Open the mixture screw another 1/4 ~ 1/2 turn. Alternatively, you can work this the other way around -- if the mixture screws are well-adjusted, closing a mixture screw by 1/2~3/4 turn should cause the cylinder to start missing. PS Well done! -- IMO you've earned that PHD in 308. | ||
| Mitchell Minh Le (Yelcab1)
Member Username: Yelcab1 Post Number: 324 Registered: 11-2001 |
Here is a picture of my freshly rebuilt engine inside the car. Just thought you guys might like to see what I have been working on for 6 months.  And here is the question. I found several different methods of balancing the carbs and so I used the one in the published Weber Carburetors book. I did: 1. Adjust the idle speed screws for 900 RPM and for the left hand side of all carbs to match up in air flow using a meter. 2. Balance the individual dual throats (side to side) with the by-pass screws to march the low side to the higher flowing side. 3. Readjust the idle speed screws for all carbs left hand throat to match up with each other and for car to run at 900 RPM 4. Idle MIXTURE screws were previously adjusted to 3 turns out from stop, so left alone now. I ran the car, pulled the plugs and found that 2 plugs were clean, 2 plugs were running slightly rich with just a little black, and 4 were too rich with black deposits. So, I am adjusting the MIXTURE screws as follows: 1. Leave the 2 OK ones as they are 2. Adjust the 2 slightly black ones by turning them inward by 1/4 turns 3. Adjust the 4 black ones by turning them inward by 1/2 turns. This is how you do it, No? |