Timing spec for 1986 C30, carb'd 454 ?? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

JellyBeanDriver · 11-23-2013, 02:47 AM

What should the ignition timing be set to for an 86' C30 dually crew cab, carb'd 454, TH400?

Thanks,

INSIDIOUS '86 · 11-23-2013, 04:08 AM

Do you have to pass emissions?

LONGHAIR · 11-23-2013, 10:18 AM

Isn't this one that should be set at 0? because the computer controls it from a "known" starting point.

donut · 11-23-2013, 10:36 AM

No computer or feedback carb on the C-30. (C-10, yes. C-30 also no cats and leaded fuel legal, least on mine)

JBD, 4* at 700 rpm for auto and manual, is what's posted on my aircleaner. IIRC, I'm actually between 12-14*

JellyBeanDriver · 11-24-2013, 01:42 AM

Thanks everyone.
Yes, have to pass smog but not for another year.

Donut - same here, no cats, no computer carb.

INSIDIOUS '86 · 11-24-2013, 01:47 AM

Set it about 12* then. When you go to emissions retard it then

11-23-2013, 02:47 AM	#1
JellyBeanDriver Registered User Join Date: Jul 2012 Location: United States Posts: 268	Timing spec for 1986 C30, carb'd 454 ?? What should the ignition timing be set to for an 86' C30 dually crew cab, carb'd 454, TH400? Thanks, __________________ 86' C30 Dually Crew Cab Ranch truck, carb'd 454, TH400, towing a slant load 4 horse trailer.

11-23-2013, 04:08 AM	#2
INSIDIOUS '86 Registered User Join Date: Jul 2009 Location: washington Posts: 4,178	Re: Timing spec for 1986 C30, carb'd 454 ?? Do you have to pass emissions? __________________ 377 sbc thumpr cam autogear m23 muncie 3:73 Detroit trutrac 3''spintech prostreet mufflers xpipe 1 3/4 headers build thread !http://67-72chevytrucks.com/vboard/s...d.php?t=577217 Iroc gauge threadhttp://67-72chevytrucks.com/vboard/s...d.php?t=554511

11-23-2013, 10:36 AM	#4
donut Registered User Join Date: Aug 2009 Location: S.C. Posts: 1,593	Re: Timing spec for 1986 C30, carb'd 454 ?? No computer or feedback carb on the C-30. (C-10, yes. C-30 also no cats and leaded fuel legal, least on mine) JBD, 4* at 700 rpm for auto and manual, is what's posted on my aircleaner. IIRC, I'm actually between 12-14* __________________ '86 C-30 dually, 454/tbh400 '73 K-20 350/350/205 (sold ) I'm kinda like duct tape- no real purpose, but handy to have around.

11-24-2013, 01:42 AM	#5
JellyBeanDriver Registered User Join Date: Jul 2012 Location: United States Posts: 268	Re: Timing spec for 1986 C30, carb'd 454 ?? Thanks everyone. Yes, have to pass smog but not for another year. Donut - same here, no cats, no computer carb. __________________ 86' C30 Dually Crew Cab Ranch truck, carb'd 454, TH400, towing a slant load 4 horse trailer.

11-24-2013, 01:47 AM	#6
INSIDIOUS '86 Registered User Join Date: Jul 2009 Location: washington Posts: 4,178	Re: Timing spec for 1986 C30, carb'd 454 ?? Set it about 12* then. When you go to emissions retard it then __________________ 377 sbc thumpr cam autogear m23 muncie 3:73 Detroit trutrac 3''spintech prostreet mufflers xpipe 1 3/4 headers build thread !http://67-72chevytrucks.com/vboard/s...d.php?t=577217 Iroc gauge threadhttp://67-72chevytrucks.com/vboard/s...d.php?t=554511



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