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06-30-2015, 10:41 AM
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#1 |
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Junior Member
Join Date: Apr 2012
Posts: 13
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Q Jet questions
How far should the sec. throttle plates open on a stock GM intake?, and how far on an open plenum intake. I know there is a measurement for the sec. air valve door opening, anybody have that number?, thanks
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07-02-2015, 11:46 AM
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#2 |
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Member
Join Date: Sep 2009
Location: Dresden On. Canada
Posts: 460
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Re: Q Jet questions
Throttle plate 90* +or - 5
Air valve most look like like they should open a little more . When I did test carbs back to back I didn't find any topend gain. ---Trevor |
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07-02-2015, 03:28 PM
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#3 |
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Senior Member
Join Date: Aug 2006
Location: Pukwana SD
Posts: 858
Likes: 554
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Re: Q Jet questions
I spent days fooling with it on the dyno never found anything unless u got it way out .Then it hurt the power.
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07-03-2015, 09:32 PM
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#4 |
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VIP Member
Join Date: Apr 2002
Location: Coarsegold, CA
Posts: 1,016
Likes: 57
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Re: Q Jet questions
Hard to test a Q-Jet on a dyno because most of them don't have wheels...
Bob
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Bob Mulry 7516 STK A & M Motorsports |
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07-07-2015, 08:28 AM
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#5 |
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Senior Member
Join Date: Aug 2006
Location: Pukwana SD
Posts: 858
Likes: 554
Liked 97 Times in 47 Posts
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Re: Q Jet questions
Evan harder if you race track is a 100 miles away.
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07-07-2015, 11:08 AM
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#6 | |
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VIP Member
Join Date: Oct 2008
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Re: Q Jet questions
Quote:
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07-09-2015, 05:14 PM
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#7 | |
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VIP Member
Join Date: Apr 2002
Location: Coarsegold, CA
Posts: 1,016
Likes: 57
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Re: Q Jet questions
Quote:
That's like having a Drag Strip in your back yard...... Bob
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Bob Mulry 7516 STK A & M Motorsports |
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07-09-2015, 07:36 PM
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#8 |
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Senior Member
Join Date: Apr 2003
Location: Aberdeen SD
Posts: 645
Likes: 30
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Re: Q Jet questions
Bob,
Jim is used to having one in his back yard (Houston). Now back in SoDak, that's no longer the case. Jerry |
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07-11-2015, 10:36 AM
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#9 |
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Member
Join Date: Nov 2002
Location: Potomac,IL
Posts: 276
Likes: 1
Liked 57 Times in 20 Posts
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Re: Q Jet questions
Secondary air door, 1.280 - 1.320 from the back of the air horn to top of secondary air door.
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Monte Howard 3209 STK, 3208 SS |
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