1776cc w/ dual webers ----Timing

[MrMADRIDer]

I have a 1776 with dual 40 idf webers. In regards to timing, are the typical tune-up procedures for 1300cc or 1600cc engines apply to a 1776 with dual carbs? What are timing specifications should I have? What idle speed is good for a 1776? Anyone have suggestions on what fuel/air mixture and idle speed specs I have while I set the distributor timing first? 

[admin]

What distributor do you have?  Your timing will vary depending on the distributor that you are using.

As for your idle and mixture screws, you'll need a synchrometer to find those settings out.  Take a look at this:



It's the best one to use.

I'm sorry I'm short on my answer this evening, but I'm bushed.    Give us some more specifics about your engine and I'll be happy to help you more.

Thanks and Welcome to our community!

Scott Faivre

[MrMADRIDer]

Hey Scott,

Thanks for your time.... A 1776 w/ dual carbs is totally new for me so please excuse my ignorance. I've dealt with 1300's and 1600's in the past. Single carbs..

I have an electronic ignition distributor(009), in which I don't think I have to manipulate anything within the distributor. (dwell angle, etc.)  I believe.....

I have the synchrometer that you posted. The person that helped me install the new engine synchronized the carbs at about '7'. The car was running good, however, after driving around, the engine had a high idle sound. Is this normal for my engine? Meaning, does a 1776 like to rev higher than other factory engines? Can't tell you the exact rpm's cause I don't have a built-in tachometer. I was concerned with this 'loud' idle and lowered the idle speed, then, everything went bad. From then on I could not find the right air/fuel and idle speed combination. My neighbor (who is an expert on muscle cars) heard me tuning my car, crossed the street and said, 'Your engine sounds flat. Get the distributor timing down first.' 

I noticed a person can obtain any reading on the synchrometer, such as a '7' with so many combinations of air/fuel mixture and idle speed changes. Either up the idle or up the fuel/air, and you can get any reading. Which leads back to my original posting question.... I will start with the distributor timing first, then go to the carbs.

Did I give you enough info on my distributor? Here are some pictures of my engine (w/ labeled pulley) and distributor (including a snapshot inside). As I use a timing gun, what readings should I look for on the labeled pulley?

[admin]

If you've never looked under the cap of your 009, I would inspect the condition of the points and check the gap.

If you wish to check your timing on the 009, set it with the static timing method.  Then adjust it with a inductive timing light. 

While the engine is cold, check your valve adjustment.

Once your timing and valve adjustments are spot on, then take a look at the carbs.  Do you have this book?



http://www2.cip1.com/ProductDetails.asp?ProductCode=C18%2D103&Click=10603

This book has some good info for the newbie to the dual carb set up.  Once you get it up and going, and you want to learn a bit more about the tuning of these carbs, theories behind jetting etc, step up to this Weber Tuning Manual



If you are totally lost, let me know and I'll give you some basic pointers to get you started. 

Next time tell the Muscle Car guy to go mind his own business!     You might have only had a vacuum leak if it was a high idle.

Take care,
Scott Faivre

[Binbear]

I check points gap, I time my 1776 at 7.5 BTDC static, ice cold

I screw the idle adjustment in all the way on each carb then back out 2 full turns for starters

I then synch the carbs using the "pringlemeter" .  Get red ball to same level using the with the idle screw to adjust on each carb (suspect around 900 rpm?) It just sounds right.

I then do the idle screw adjust bit on each carb (in to stumble, then back out 1/2 turn), rechecking synch on each carb again so its the same.



 

[Binbear]

Correction... I meant "air mixture screw" vice "idle screw" for the mixture adjustment on each carb