Carb tuning questions Options

[KaptKaos]

I am getting close to firing up my new motor. It's a 1911 with unknown cam (not stock). I have weber 44 idfs on there. The venturis don't have any marking as to their size. I have the other numbers for the mains, idles, air, & emulsion written down somewhere.

Now I know it's hard to predict what the best combination will be, but I want to see if anyone has experience with a similar setup to see what they were running. I will need to by additional bits for tuning, and I hope to minimize that as best I can.

Thanks in advance.

[Twystd1]

Joe,

Break out a measuring tool and find out what vents you have. And I hope they are 32s.

Cause thats what you probably need. 34s, 36s or 38s are gunna be too big.

NOTE: If this is a new engine. And not a used engine. Use a KNOWN good set of carbs to break in your engine if you can.
Caveat: Unless you are pretty dam sure your carbs are in good working order and AREN'T over jetted.

Why you may ask...???????????????????????????????????

Cause if you break in a new engine and your carbs are running very rich....... Your rings won't seal. The fuel will wash the oil off the cylinder walls and rings and they don't seat.... EVER.

OR: You might be taking your top end off and re-ringing the pistons and re-honing your cylinders. (Just ask MattR)

I have seen 4 cases of that right here in our 914 arena. And the fellas couldn't understand why a new engine smoked and consumed oil like a fat lady at a Crispy Creams shop. (Or Aaron.... same difference)

At least post your jet sizes, Emulsion tube and venturi sizes here BEFORE you fire that engine up....!!!!!!!!!!!

(This assumes it's a never been fired engine)

Call me if ya need me..... 949.944.082one

Claytonobitch

Now whats your name again...???? Fred...???????

[gjones]

Joe,

Break out a measuring tool and find out what vents you have. And I hope they are 32s.

Cause thats what you probably need. 34s, 36s or 38s are gunna be too big.

NOTE: If this is a new engine. And not a used engine. Use a KNOWN good set of carbs to break in your engine if you can.
Caveat: Unless you are pretty dam sure your carbs are in good working order and AREN'T over jetted.

Why you may ask...???????????????????????????????????

Cause if you break in a new engine and your carbs are running very rich....... Your rings won't seal. The fuel will wash the oil off the cylinder walls and rings and they don't seat.... EVER.

OR: You might be taking your top end off and re-ringing the pistons and re-honing your cylinders. (Just ask MattR)

I have seen 4 cases of that right here in our 914 arena. And the fellas couldn't understand why a new engine smoked and consumed oil like a fat lady at a Crispy Creams shop. (Or Aaron.... same difference)

At least post your jet sizes, Emulsion tube and venturi sizes here BEFORE you fire that engine up....!!!!!!!!!!!

(This assumes it's a never been fired engine)

Call me if ya need me..... 949.944.082one

Claytonobitch

Now whats your name again...???? Fred...???????

Let's say someone did this and has now resolved the rich issue- should this person pull the heads at this point or see if they might seal. Also have you had good luck with 44 IDF's ran with 32 venturis- this person does not have plans on going bigger on the engine- but does run at the track occsionally- willing trade trade out the 44's for 40's if necessary.