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05-17-2006, 04:38 PM
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CC Member
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Join Date: Jun 2004
Location: Omaha,
NE
Cobra Make, Engine: Innovative, , 302, medium mild
Posts: 19
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Not Ranked
Total timing is 46 degrees?!?!?
Hello guys I am new here , nice to meet you all I have a cobra body I purchased from someone I will leave un-named down in florida
I built a tube chasssis and have a mild 302 (stock)with tremec 5 speed and jag rear.
My problem is I set the initial timing at 6-8 and at 2500 rpm I have total and it's 46 degrees????? no ping but ??? Is my timing light broken why don't I have holes in my pistons, way too rich also??
HELP
Mick in Omaha
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05-17-2006, 04:46 PM
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CC Member
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Join Date: Dec 2001
Location: Louisville,
KY
Cobra Make, Engine: I'm Cobra-less!
Posts: 9,417
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Not Ranked
EFI or carb? Is it a vacuum advance?
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05-17-2006, 05:49 PM
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CC Member
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Join Date: Jun 2003
Location: Freedomia,,
Il
Cobra Make, Engine: Coupe,Blue w/white stripes SB; Roadster, Blue w/white stripes BB w/2-4s; SPF installer/Hot Rod-Custom Car builder
Posts: 1,376
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Not Ranked
I'd recurve the dist. It would probably be better with 12-16 fegrees initial and about 38 total. That would be a nice starting place. 46 is too much. you may noy have any ping for a number of reasons...long overlap cam, low compression...or you may not be hearing it over the exhaust. It will also depend on how quick it comes in, but I think 46 is too much regardless of when it comes in.
__________________
WDZ
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05-18-2006, 06:58 AM
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CC Member
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Join Date: Jun 2004
Location: Omaha,
NE
Cobra Make, Engine: Innovative, , 302, medium mild
Posts: 19
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Not Ranked
Thanks
I have a carb and vacuum advance, edelbrock performer with dual plane manifold. It likes when the timing is around 12-16 initial.
shouldn't timing come in gradually? , I think the springs are wore out or just too soft cause it is maxs out (total timing)by 2700 rpm I would think you want it to come in graduallly and be at total at around 3500 rpm , am I correct?
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05-18-2006, 07:42 AM
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CC Member
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Join Date: Nov 2003
Location: New Britain,
CT
Cobra Make, Engine: Size 10 Feet
Posts: 3,028
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Not Ranked
The operative thing here is the vacuum advance. It must be disconnected while you measure advance.
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05-18-2006, 08:55 AM
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CC Member
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Join Date: Dec 2001
Location: Louisville,
KY
Cobra Make, Engine: I'm Cobra-less!
Posts: 9,417
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Not Ranked
That's what I was trying to get at about the vacuum advance....I knew there was a connection, but I've never messed with vacuum advance distributors....all the ones I've had were mechanical.
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05-18-2006, 12:51 PM
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CC Member
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Join Date: Jun 2004
Location: Omaha,
NE
Cobra Make, Engine: Innovative, , 302, medium mild
Posts: 19
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Not Ranked
Disconnect vacuum advance while measuring total
I am sure this is how I measured it with the vacuum advanced disconnected and the port on the carb plugged.  |
05-18-2006, 03:44 PM
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CC Member
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Join Date: Dec 2001
Location: Louisville,
KY
Cobra Make, Engine: I'm Cobra-less!
Posts: 9,417
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Not Ranked
Sounds like you just need to change springs. I didn't know they made any that advanced around 30 degrees...
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05-19-2006, 06:26 AM
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CC Member
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Join Date: Jun 2004
Location: Omaha,
NE
Cobra Make, Engine: Innovative, , 302, medium mild
Posts: 19
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Not Ranked
How 30 degrees is possible
The little arms (not sure of technical term) have a number stamped on them like 13L or 15L or 18L this is the amount of advance each will add
ie: both are 13L then you will get 26 degrees. of course mine are not ledgable.
Anyone have ideas were you can buy distributor parts?
Mick
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05-19-2006, 06:50 AM
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6th Generation Texan
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Join Date: Feb 2002
Location: Devil's Backbone,RR 32,
TX
Cobra Make, Engine: Lone Star Classics #240,Candy Apple Red,Keith Craft 418w - 602 HP,584 TQ
Posts: 8,157
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Not Ranked
Mick,
What brand distrbutor do you have ?
I think you are missing the bushing that determines the maximum amount of centrifigul advance.
The springs & weights deal with the rate of advance,not total.
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05-19-2006, 07:56 AM
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CC Member
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Join Date: Jun 2004
Location: Omaha,
NE
Cobra Make, Engine: Innovative, , 302, medium mild
Posts: 19
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Not Ranked
Type Distributor
I have a stock 302 with the stock distributor with a vacuum advance the tag on it says
4K 23
E5ZE
12127
BA
any info on this appreciated
Mick
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05-19-2006, 11:19 AM
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CC Member
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Join Date: Jun 2003
Location: Freedomia,,
Il
Cobra Make, Engine: Coupe,Blue w/white stripes SB; Roadster, Blue w/white stripes BB w/2-4s; SPF installer/Hot Rod-Custom Car builder
Posts: 1,376
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Not Ranked
I would bypass the vacuum can and cap it and the vacuum fitting and run the initial and see what it is total then. From the # in the dist. I am guessing that you may have been tapped into ported instead of manifold vacuum.
__________________
WDZ
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05-19-2006, 09:30 PM
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CC Member
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Join Date: Jun 2004
Location: Omaha,
NE
Cobra Make, Engine: Innovative, , 302, medium mild
Posts: 19
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Not Ranked
I shall return
I will double check total timing and get back to you all
I am quite certain I checked it correctly but you never know.
Thank you all very much
I will post my results
Mick
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05-20-2006, 11:29 AM
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CC Member
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Join Date: Sep 2003
Cobra Make, Engine: ERA - 427
Posts: 56
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Not Ranked
Before adjusting, be certain that your timing marks are valid.
i.e. TDC #1 is 0° on the marks.
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05-22-2006, 06:33 AM
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CC Member
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Join Date: Jun 2004
Location: Omaha,
NE
Cobra Make, Engine: Innovative, , 302, medium mild
Posts: 19
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Not Ranked
TDC = zero
Good Call I double check that as well.
Thanks to all
Mick
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05-22-2006, 07:48 PM
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CC Member
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Join Date: Jun 2004
Location: Omaha,
NE
Cobra Make, Engine: Innovative, , 302, medium mild
Posts: 19
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Not Ranked
Thanks guys . Initial is 16 at idle and at 3500 rpm it is 36 degrees thank you for your help I think I was doing something wrong , I could not duplicate earlier results but thats ok it is dead on now, thanks again to all of you
Mick in Omaha
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05-22-2006, 07:53 PM
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CC Member
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Join Date: May 2001
Location: The Heart of the Citrus District,
NJ
Cobra Make, Engine: Sold 3047 & 3002 in 2012
Posts: 2,763
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Not Ranked
Timing
Quote:
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Originally Posted by go300mph
I have total and it's 46 degrees????? no ping but ??? Is my timing light broken why don't I have holes in my pistons, way too rich also??
HELP
Mick in Omaha
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When you get to 50....SELL  |
05-24-2006, 02:39 PM
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CC Member
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Join Date: Nov 2002
Cobra Make, Engine: Midstates,SBF 357
Posts: 418
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Not Ranked
Go to http://www.reincarnation-automotive....ons_index.html. There is all the information you need for a duraspark dist. Good luck
Last edited by sharpe 1; 05-24-2006 at 02:54 PM..
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05-25-2006, 06:57 AM
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CC Member
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Join Date: Jun 2004
Location: Omaha,
NE
Cobra Make, Engine: Innovative, , 302, medium mild
Posts: 19
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Not Ranked
16 Initial and 36 total
Thanks Guys for all your help.
She now purrs like a sick kat
Mick
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