I am in need of a wise Mechanics help.....

[banzai510(hainz)]

NEVER USED ONE(gauge)

Just ck the dist timming as we said. Your cam timming is fine.

 

Like I said BEFORE you should be able to go from 0 -20 BTDC with a timming light by turing the dist. IF NOT then soemtime is off. Like the dist or wrong dist mount ,something of that nature. including dist

[DanielC]

You do not measure vacuum at the carb.  Many carb ports are not full vacuum.  Measure vacuum at the manifold below the carb.

[d510addict]

ohhhhhh I will do that. Oh and thank you for all thr help, I adjusted the dizzy drive to 11:28 position dialed down the idle as best I could and set the timing to 11/12. Big improvement.

[banzai510(hainz)]

a L20 w DGV in  a low geared 521 should go pretty good at least up to 5k rpm.

[racerx]

Measure vacuum at your intake manifold.

[banzai510(hainz)]

waiting for a better update

[d510addict]

Ive done everything already. The car runs well, a big improvement. I think the problem was I was setting the ign timing with too high of a idle rpm AND the dizzy drive was off a tooth which really just limited how much I could turn the dizzy for adjustment. All I need to do is set the carb tomorrow.

[racerx]

Yep..get familiar w using vacuum gauge cuz it can tell u about timing. Just make sure you hook it up to the intake manifold. Glad to hear ur car is running good.

[banzai510(hainz)]

I have never used a gauge

[datzenmike]

They are a non electronic, diagnostic tool and a skillset for reading and interpreting them is needed, like reading spark plugs. It can diagnose lots of carb and valve problems and indicate what's going on in the combustion chamber (ignition) and even what's going on in the exhaust pipe.

[d510addict]

Illvhave to read up on then.

[racerx]

Yep..lots of stuff in the net about vacuum gauges.  Old skool mechanics relied on them a lot to not only diagnose engine issues but can even adjust carb settings.  Makes sense since engine creates vacuum and car needs vacuum to operate.  They are only like $20.00.

[d510addict]

http://www.autospeed.com/cms/article.html?&title=Using-a-Vacuum-Gauge-for-Engine-Diagnostics&A=2393

 

 

Reading.....

[banzai510(hainz)]

timming light would catch this. Which every L motor owner should have

[DanielC]

Mechanically, there is not a lot of difference between a 1940 flathead engine, and the latest, electronically controlled modern engine out there.  If either engine has poor vacuum, because of some mechanical condition, it is not going to run good.

[racerx]

necessary diagnostic tools we all should have for ol skool cars like our beloved Datsuns:  timing light (dial type), vacuum gauge, vacuum pump, compression checker and dwell meter (with RPM).  You can even adjust carb setting with a vacuum gauge.  You maximize vacuum and back off a tad with fuel mixture screw.