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Old 04-19-2007, 01:00 PM
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new supercharger

hey everyone i recently installed a 6-71 blower on a 350 chevy that was built by a local shop for a customer. i know nothing about whats in it.. i am just trying to tune it.. it presently has 2 650 edlebrocks sitting on it if anyone can help with metering rods and timing adjustments thanks........

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Old 04-19-2007, 02:36 PM
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Here's is the response I got from Edelbrock tech when I asked them how to set up my 6-71/350...

-If there's any street driving at all, a progressive linkage is a must.
-The carburetors should be our # 1405 600cfm carbs. We recommend starting out with # 1429 jets all the way around, and # 1450 metering rods. You will also need the high flow needles and seats, # 1466.
-Vacuum secondaries will not be a problem with the blower.


If responding to answer, please reply with original email!
Ray Garcia
Technical Dept.
Edelbrock Corporation

Blower motors like a lot of initial advance. I'm running 16* on my MSD set-up. Mechanical advance curve is 1200-2800, with 36* max advance. This was the set-up recommended by MSD. I have their 6AL box and magnetic p/u distributor.

Do you know what your blower drive ratio is? That will establish your boost. If you don't know how your motor is built, I'd recommend you keep the boost fairly mild... no more than 6 or 7 pounds.
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Old 04-19-2007, 04:06 PM
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here is a link to the Edelbrock online instruction book.

The tec at Edelbrock told me to follow the directions on page 17 to set up the carbs for a blower. I have the Wieand 671 with 2 1405 Edelbrocks on it.
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Old 04-21-2007, 01:05 AM
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thanks everyone.. the car has passed to the body shop now and i have increased the meetering rod size. keeping inmind the engine vac to blower paressure the car is really fat rite now and seems very responsive.. when it returns i will be tunin it... it is a pump gas car that will see nothing but sheer abuse as the owner is a collector and has a hemi challenger...i thank you for your help... when it returns i will post if i cant use what you gave me and some common sence to make it work..
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