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Join Date: Mar 2005
Location: New Hampshire
Posts: 208
1968 911 - Altitude Adjustment

We've just moved from southern Arizona (5000 feet above sea level and dry) to Woodbridge, Virginia (near sea level and humid). I took my 1968 911 2.0L with weber carbs out for a first spin yesterday and was underwhelmed with the performance. Time to adjust the carbs!

I've never had a 911 before I bought this 1968 coupe this summer, so I'm learning.

As a baseline, Dave Radmacher (Tucson) did an excellent rebuild/adjustment job on the Weber 40s just 3 months ago and greatly improved the initial performance.

Observations:

- car ran very well before we left AZ.
- car now lacks power above 5000PM.
- some spitting through carbs on start-up.
- car has brand new Taylor ignition wires and NGK BP8ES spark plugs.
- float levels were synchronized by Mr. Radmacher.

I've read some excellent posts on this Pelican board by T-Bird and others but have a basic question: should I just pull the spark plugs, assess and adjust the idle mixture accordingly? Or is there a better starting place?

Also, as a newbie to the greater Washington DC area, I'd appreciate any advice as to a good mechanic or shop that knows these early cars.

Thanks to all in advance for your advice.

Special thanks to Grady Clay who gave me such good advice when I first bought this car.

Best Regards,
Andy
1968 Porsche 911 base coupe "Hot Rod"
Old 08-26-2007, 05:15 AM
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