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Total timing. Need distributor advice. #106105 08/16/08 08:45 PM 08/16/08 08:45 PM
Joined: Jan 2003 Posts: 5,791 Hamilton, Ontario Canada Magnum OP master
Magnum OP master Joined: Jan 2003 Posts: 5,791 Hamilton, Ontario Canada	Ran my pick up in time trials today. It's a 87 Ram with a 5.9L Magnum straight from a 2500 Van. 670 Holley, M1 dual plane, shortie headers. Behind that is a wide ratio 5 speed manual. 4:1 1st, 1:1 4rth. It's 4000lbs, 3.55's with a 28" tire. I've slowly advance the timing from a conservative 28 deg to 32. It went from 15.11 @ 90 to 14.80 @ 91.5 mph. Here is where I need your help. It ran it's fastest and quickest time rattling in 4rth. Backed it to a safer 30 deg but it slowed to 14.94 @ 91.5 and I want my tenth back. 69 Super Bee, 93 Mustang LX, 04 Allure Super

Re: Total timing. Need distributor advice. [Re: Magnum] #106106 08/16/08 11:57 PM 08/16/08 11:57 PM
Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska	maybe richening it up a bit & colder plugs & see if that would let it tolerate that extra 2 degrees. You for sure don't want it to be pinging.

Re: Total timing. Need distributor advice. [Re: RapidRobert] #106107 08/18/08 08:15 AM 08/18/08 08:15 AM
A Anonymous Unregistered
Anonymous Unregistered A	are you running premium?

Re: Total timing. Need distributor advice. #106108 08/18/08 12:31 PM 08/18/08 12:31 PM
Joined: Jan 2003 Posts: 5,791 Hamilton, Ontario Canada Magnum OP master
Magnum OP master Joined: Jan 2003 Posts: 5,791 Hamilton, Ontario Canada	I've never opened the carb. So Rapid I do think some jetting is in order. The truck seems to run quicker when it's hot. Does this add up? Cucu. The fuel is 87 octane. I thought about throwing in some booster or premium but I'm trying to set it up "as it's driven". Isn't 87 enough for a stock engine? 69 Super Bee, 93 Mustang LX, 04 Allure Super

Re: Total timing. Need distributor advice. [Re: Magnum] #106109 08/18/08 01:00 PM 08/18/08 01:00 PM
A Anonymous Unregistered
Anonymous Unregistered A	I would back down the timing or use premium. If you have vacuum advance hooked up, that can increase your total timing way above what you think you have at part throttle cause the total mech adds to the vaccum. You could try disconnecting the vacuum advance and trying it with the 87. btw, a tankful of premium is about $3 more than a tank of 87

Re: Total timing. Need distributor advice. [Re: Magnum] #106110 08/18/08 03:16 PM 08/18/08 03:16 PM
Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska	Quote: I've never opened the carb. So Rapid I do think some jetting is in order. The truck seems to run quicker when it's hot. Does this add up? I cannot say for sure. Better gas would be the easy way out but where would the fun in that be. live every 24 hour block of time like it's your last day on earth

Re: Total timing. Need distributor advice. [Re: RapidRobert] #106111 08/18/08 04:32 PM 08/18/08 04:32 PM
Joined: Jan 2003 Posts: 2,931 P Paul_Fancsali master
Paul_Fancsali master P Joined: Jan 2003 Posts: 2,931	I run my 360 at 200 degrees run best at that temp. However you must run premium 93 or they will ping By the way get the timing to close to 36-40 and that truck may click a 14.6

Re: Total timing. Need distributor advice. [Re: Paul_Fancsali] #106112 08/18/08 07:33 PM 08/18/08 07:33 PM
Joined: Aug 2004 Posts: 1,213 Los Angeles, CA Mobarge pro stock
Mobarge pro stock Joined: Aug 2004 Posts: 1,213 Los Angeles, CA	I'm running 38* total and have to run 101 octane - go with the premium gas, and try 34* '71 SSP - SOLD!

Re: Total timing. Need distributor advice. #106113 08/19/08 01:52 PM 08/19/08 01:52 PM
Joined: Apr 2004 Posts: 1,396 Mass dgc333 pro stock
dgc333 pro stock Joined: Apr 2004 Posts: 1,396 Mass	Quote: I would back down the timing or use premium. If you have vacuum advance hooked up, that can increase your total timing way above what you think you have at part throttle cause the total mech adds to the vaccum. You could try disconnecting the vacuum advance and trying it with the 87. btw, a tankful of premium is about $3 more than a tank of 87 Vacuum advance won't have any impact on WOT throttle acceleration because the intake vacuum is close to zero well below the point at which the vacuum advance would add timing. Magnum heads are much more efficient than open chamber LA heads so you won't need as much timing. I run my 360 with magnum heads with 33 degrees of total timing. You never said at which rpm you are getting detonation. If it is in the lower rpm range going to a stiffer spring in the distributor will bring the timing in slower. If its above 3500 rpm then its likely to much timing for the combo. I agree, in my area there is a $0.20 difference per gallon between 87 and 93 and I typically but 14 gallons in when I fill the car for a $2.80 difference. Last edited by dgc333; 08/19/08 01:53 PM. Dave Clement Pembroke, MA 03 PT Cruiser GT Turbo 99 Dakota SLT+ CC 4x4 68 Barracuda sport coupe http://home.comcast.net/~dgc333/

Re: Total timing. Need distributor advice. [Re: dgc333] #106114 08/19/08 03:35 PM 08/19/08 03:35 PM
A Anonymous Unregistered
Anonymous Unregistered A	Quote: Vacuum advance won't have any impact on WOT throttle acceleration because the intake vacuum is close to zero well below the point at which the vacuum advance would add timing. very true but at part throttle cruise it does. I personally do not run vacuum advance

Re: Total timing. Need distributor advice. #106115 08/19/08 08:36 PM 08/19/08 08:36 PM
Joined: Apr 2004 Posts: 1,396 Mass dgc333 pro stock
dgc333 pro stock Joined: Apr 2004 Posts: 1,396 Mass	Yep but the original poster is having detonation issues at the drags where I would assume he is running WOT. Dave Clement Pembroke, MA 03 PT Cruiser GT Turbo 99 Dakota SLT+ CC 4x4 68 Barracuda sport coupe http://home.comcast.net/~dgc333/

Re: Total timing. Need distributor advice. [Re: dgc333] #106116 08/19/08 09:55 PM 08/19/08 09:55 PM
A Anonymous Unregistered
Anonymous Unregistered A	then put some premium in it and be done with it

Re: Total timing. Need distributor advice. #106117 08/19/08 10:31 PM 08/19/08 10:31 PM
Joined: Apr 2005 Posts: 12,271 Overpriced Housing Central RobX4406 I Live Here
RobX4406 I Live Here Joined: Apr 2005 Posts: 12,271 Overpriced Housing Central	If it's rattling in high gear, I'll bet it's rattling in the others as well. You just can't hear it.

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