Timing or carb

[Karzapart55]

I bought a 76 bus with a 2.0 that was missing the F.I. And Dist. I have it on the bench. I installed a 009 and dual Webbers. I set the D pointing to #1 with the #1 approx. TDC. Started it on bench, fired right up. My Q. Should I set the timing 1st, or set the carbs? It idles rough. Can I set the timing with the rough idle? Thanks

[SGKent]

first set the timing at 3500 +/- RPM 28 - 29 degrees BTDC

[Peabody]

+1 on timing first. Must be in time or tuning the carbs is all for nothing.
_________________
'71 Transporter "June" (traded a nissan hardbody + some $) (daily)
'76 Westy "Sandy" (traded an ak-47) (on hold)
'77 Westy (parts)
'74 Westy (parts)

[busdaddy]

On the bench a sustained 3500+ RPM may be really exciting, set the timing by moving the distributor until it sounds pretty good and check with a light if you wish (~7.5 BTDC with the hoses off) then set up the carbs, then go back and do the timing at speed and the final carb tweak after it's installed.

What 3500 on a bench may resemble:


Link

_________________
Rust NEVER sleeps and stock never goes out of style.

Please don't PM technical questions, ask your problem in public so everyone can play along. If you think it's too stupid post it here
Stop dead photo links! Post your photos to The Samba Gallery!

Слава Україні!

[airschooled]

I didn't know EMPI made washing machines.
_________________
Learn how your vintage VW works. And why it doesn't!
One-on-one tech help for your Volkswagen:
www.airschooled.com

[obx71super]

Haha that was hilarious!!!
_________________
71 super auto stick basically original minus a couple resprays
73 Westy automatic with a 2 liter gex, soon to be a 1.8 liter Headflow masters
Newest Addition!! Solid straight 74 thing totally disassembled!! YEEEWWWW

[Desertbusman]

With an 009 the advance will be full in before it gets to 3,000 RPM. So 29* BTDC when it reaches full advance. Like BD says go ahead and tweek the timing or the carbs so you can get it up to that full advance RPM. Your question about setting the timing with a rough idle is of no concern since you won't be setting it at idle.
Do the valve adjustment first. Cold engine if it has solid lifters. Then get it up to speed to do the timing. Finally, set the carbs. If they havn't been running on that engine previously then you are going to have quite a time getting them dialed in proper. And you will need a sync tool.

For the initial settings bouncing back and forth between ignition and carbs is no problem and may be necessary. Just so the order of final tune is valves, timing and carbs.

3500 on a bench might be a bit traumatic. But only 3000 is not as bad. Mine was sitting on the ground when I ran it in for the initial 20 minutes at 2000 RPM. Now that was immediatly at 2K after first firing and before any timing light or carb tuning.
_________________
71 Superbug
71 Westy

[erikgundy98]

[Wildthings]