Jetting and tuning of 40 Dels

[ChrisZ]

Hi guys, per Scotags recommadation i'm starting this thread.

 

I am finally at the point where i got my 40 DHLA (no prefix) installed, it did take a little time, starting with ending off what Lynx started, i made some improvement to the crappy linkage they normally use, so when i finally got them carbys on, i found out that there was a needle valve missing and ine of the tabs that hold the float was broken, i repaired the lid and got a new needle valve, half way in the progress og making a cold air intake, i decided to use regular air filters due to the look, two weeks later i got them from the US, then i powered on my lathe and turned some stacks, all of this was put together during this weekend and i finally got my car home from the storage and the trip back home was the first real test drive.

 

My tach has fault readings so i cant tell at what RPM range the car do what.

 

When accelerating the car pulls hard to about 100 km/h in 2nd gear and then it just cut off, no more juice, it does the same i 3d gear, but it feels as it is at lower RPM, my best guess at this time is that it is leaning out and i need bigger mains.

At cruise the car have a tendence to pop in the exhaust and also when i let go of the pedal it pops, why does it do that ?

 

At idle the car runs pretty smooth but is spilling gas out of the exhaust, idle mixture screws is 3 turns out, the final mixture setting i not made so far, i like to get my hands on a color tune to do that.

 

Engine is L26, running a NOS ZX dizzy with a Beru coil, advance is set at about 17 degrees at idle (800 RPM) jetting is as follow

 

Aux venturi - 30

Main - 132

Air - 180

Emulsion tube - 7772.5

Idle jet - 45

Idle jet hoilder - 7850.1

Starter jet - 70

Starter emulsion - 7482.1

Pump jet - 40

 

Thinking about getting some 145 - 150 mains, any suggestions guys, let me know of your thoughts.

 

Chris

[Scoota G]

Take a look at this and see what others are running.

15558_859b278cead5eb9d373ad3da25a805bd6ba61d5d.pdf

[stevo_gj]

Wow that is brilliant. Saving that for my future forays into triples. Thanks!