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Will less back pressure make engine run richer or leaner
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Topic: Will less back pressure make engine run richer or leaner (Read 4067 times)
Smelly_Cat
LaFayette, GA
Joined: Apr 2005
Posts: 1938
Liked: 2 times
Will less back pressure make engine run richer or leaner
«
on:
October 26, 2011, 08:05:14 PM »
So will less back pressure lean out a carb engine? Sc
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71 Super,83 RX7, 91 Saab, 94 Saab turbo conv, 94VolvoSW
Zen
Show Chairman
Club Member
LaFayette, GA
Joined: Dec 2001
Posts: 8842
Liked: 2 times
Re: Will less back pressure make engine run richer or leaner
«
Reply #1 on:
October 27, 2011, 09:01:52 PM »
I'm not sure. When I have less pressure on my back, I feel leaner AND richer.
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Zen
"In theory there is no difference between theory and practice. In practice there is." -- Yogi Berra
"OK !!!!! ALL TOGETHER NOW !!!! Bosch-Bosch- Bosch !!!!!!!!!!!!!!" -- Ret.Bugtech (from the Help With a Slow Starter thread)
Smelly_Cat
LaFayette, GA
Joined: Apr 2005
Posts: 1938
Liked: 2 times
Re: Will less back pressure make engine run richer or leaner
«
Reply #2 on:
October 27, 2011, 09:14:06 PM »
Lol
Zen
What if you ran vw engine without exhaust pipes?
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71 Super,83 RX7, 91 Saab, 94 Saab turbo conv, 94VolvoSW
Zen
Show Chairman
Club Member
LaFayette, GA
Joined: Dec 2001
Posts: 8842
Liked: 2 times
Re: Will less back pressure make engine run richer or leaner
«
Reply #3 on:
October 27, 2011, 10:21:35 PM »
Quote from: Smelly_Cat on October 27, 2011, 09:14:06 PM
Lol
Zen
What if you ran vw engine without exhaust pipes?
These days, I'm just wondering "What if my VW engine ran?"
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Zen
"In theory there is no difference between theory and practice. In practice there is." -- Yogi Berra
"OK !!!!! ALL TOGETHER NOW !!!! Bosch-Bosch- Bosch !!!!!!!!!!!!!!" -- Ret.Bugtech (from the Help With a Slow Starter thread)
Got Bug ?
Chattanooga, Tn
Joined: Mar 2010
Posts: 97
Re: Will less back pressure make engine run richer or leaner
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Reply #4 on:
October 28, 2011, 10:22:19 AM »
Less back pressure usually requires that you rejet a few steps richer.
A plug reading would be a simple way to check. Black deposits = too rich, chocolate brown = good, white = a hole in your piston in a little while.
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The good lord giveth and the junkman taketh away
dubtech
Hixson
Joined: Apr 2005
Posts: 251
Re: Will less back pressure make engine run richer or leaner
«
Reply #5 on:
October 28, 2011, 09:19:28 PM »
Quote from: Smelly_Cat on October 27, 2011, 09:14:06 PM
Lol
Zen
What if you ran vw engine without exhaust pipes?
It would be _very_ loud for a little while and then it would burn up the exhaust valves. Be sure to take a video as the flames would be impressive.
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