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12-02-2022, 06:38 AM
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#1 |
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Registered User
Join Date: Feb 2022
Location: East Wenatchee, wa
Posts: 6
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66 gmc
Hi, my name is Kent. I've been working on a 66 GMC truck for about a year now. It was a rust pile that did not run when I bought it. Now it runs well and looks good. I've rebuilt almost everything on it. The latest was new headers and exhaust. I got the headers on but having some issues with loss of power. I'm hoping to get some tune-up advice. Thanks!
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12-02-2022, 01:40 PM
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#2 |
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Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,512
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Re: 66 gmc
Welcome from the Island Kent!
Vancouver Island that is. Headers lean out your motor. You need to rejet or add a bunch of initial timing. Timing is easier. What motor/trans you got? |
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12-03-2022, 06:26 AM
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#3 |
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Moderator
  
Join Date: Aug 2011
Location: China Spring, TX
Posts: 7,280
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Re: 66 gmc
Welcome to the forum.
__________________
Master Chief, US Navy, Retired 1964 C10 Step-side Short Bed - In Progress 2009 2500HD Duramax LTZ 1948 GMC Panel 1956 Big Window Stepside 1953 5 Window Chevy Stepside 1932 Coupe New Seat Foam for Bench Seats? |
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12-03-2022, 08:03 AM
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#4 |
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Registered User
Join Date: Feb 2022
Location: East Wenatchee, wa
Posts: 6
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Re: 66 gmc
Hey thanks guys...im excited to be here! Everyone on here has a lot of good advice. And thanks Geezer#99...I figured I would need to play with timing, but I only have a harbor freight gun that doesn't work. I kind of figured ide have to retard the timing? But you say advance a lot? How much? And is the only way to get my Quadro jet carburator to run more rich is to change the jets? Thanks for the advice!
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12-03-2022, 08:05 AM
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#5 |
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Registered User
Join Date: Feb 2022
Location: East Wenatchee, wa
Posts: 6
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Re: 66 gmc
Oh, and it's a 305 V8 with a munchin 3 on the tree trans
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12-03-2022, 08:35 AM
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#6 |
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Senior Member
 
Join Date: Dec 2009
Location: TN.
Posts: 7,725
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Re: 66 gmc
 Welcome to the Forum.
__________________
________________________________________________________________________________________ ____________________________________________ 84 Chevy K-20 63 Impala (my high school car) http://67-72chevytrucks.com/vboard/s...Crew Cab Build |
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12-03-2022, 09:22 AM
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#7 |
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Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,512
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Re: 66 gmc
Try your initial at 14. Plug off the vac advance when you set it.
You should start a thread in the engine section or 60-66 section to get more help. |
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