Re: about 5 minutes after start....
[Re: blownzoom440]
#812803
09/23/10 11:33 PM
09/23/10 11:33 PM
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Joined: Jul 2010
Posts: 1,845 Tampa
DusterDave
top fuel
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top fuel
Joined: Jul 2010
Posts: 1,845
Tampa
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Not that this is related to your issue, but, you did keep an eye on the oil pressure, right?
Gone to the dark side with an LS3 powered '57 Chevy 210
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Re: about 5 minutes after start....
[Re: DusterDave]
#812804
09/24/10 04:44 AM
09/24/10 04:44 AM
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Joined: May 2008
Posts: 42 Marshall, Texas
royt440
OP
member
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OP
member
Joined: May 2008
Posts: 42
Marshall, Texas
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Thanks guys,
I will definitely check the timing. I tightened the distributor hold down where I could still move it by hand (not easily, it didn't move during the run). So, the rotor is turning counterclockwise and I would retard by turning the distributor body clockwise?? or is my thinking off?
Prepped by turning the oil pump counterclockwise with an electric drill. Had 80lbs during this priming on a mechanical gauge (my fancy Nexus must not be getting a signal). Then stabbed the distributor and tried to start it. Found out the battery was really weak (barely turned over). Quickly pulled a battery from a running car and it started after a few tries (pumping the gas, choke on, a little starter fluid sprayed into the manifold, etc.) As soon as it started I took it over 2000 since the cam was new.
Sorry to say I didn't notice the oil pressure after start.
On a subsequent start, the fuel line pressure drops to about 2.5 lbs while running. Just before starting, I had 5.5. Is this normal? The regulator is not working correctly so I had adjusted the pressure by restricting the return line. I only ran it for 17 seconds.
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Re: about 5 minutes after start....
[Re: Mopar_Rich]
#812807
09/24/10 10:40 AM
09/24/10 10:40 AM
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Joined: Feb 2003
Posts: 4,953 Houston, Texas
TheOtherDodge
master
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master
Joined: Feb 2003
Posts: 4,953
Houston, Texas
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Quote:
Glowing headers is always caused by retarded timing. Lean conditions will only cause heat when under power - not at idle out of gear. Get that timing advanced!
![](/ubbthreads/images/graemlins/iagree.gif)
That is exactly what happend to me when I fired up my motor a month ago. I thought I had enough timimg but didn't...
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Re: about 5 minutes after start....
[Re: blownzoom440]
#812810
09/24/10 01:25 PM
09/24/10 01:25 PM
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Joined: Jan 2003
Posts: 24,562 Brookeville, Md
Mr.Yuck
Not enough dumb comments...yet
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Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
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Quote:
you wont see any boost untel you power brake it realy hard.we could use some engine info just to get an idea of what you have.welcome to boost!
what he said no boost until the motor is under load. Set your initial and idle mixtures as you would w/ a N/A motor.
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Re: about 5 minutes after start....
[Re: blownzoom440]
#812811
09/24/10 01:26 PM
09/24/10 01:26 PM
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Joined: Oct 2006
Posts: 4,590 Indy
joshking440
Lunch is on me!
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Lunch is on me!
Joined: Oct 2006
Posts: 4,590
Indy
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Quick lesson/info on map sensors from last weekends personal experience!!
First how many bar map do you have.
Does it read in psiA or psiG
This will make a huge difference.
psiA does not factor in atmospheric pressure, so 1 pound of boost isnt infact 1 pound until about 15.7 on the igntion
Also, im not sure your initial timing, but 1 degree per pound is a really to much at low boost levels I wouldnt look to pull much of anything until 6-7 pounds of boost if it reads psiG than infact 1lb is a true 1 pound of boost.
Mine is a 3 bar map and 0-14.7 is truly vaccum. Also How are you adjusting this/
Last edited by joshking440; 09/24/10 01:29 PM.
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Re: about 5 minutes after start....
[Re: joshking440]
#812812
09/24/10 06:20 PM
09/24/10 06:20 PM
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Joined: Jan 2005
Posts: 2,540 Milwaukee WI
TRENDZ
master
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master
Joined: Jan 2005
Posts: 2,540
Milwaukee WI
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Glowing tubes indicates retarded timing as stated. 1 degree per 1psi is a safe way to start, but wont put you where you really should be. Your question about fuel pressure leads me to believe your regulator reference port is plumbed below the carb's throttle plates (vacuum applied to the regulator will decrease fuel pressure). Move the reference line to a place in the air stream before the carb. Timing with forced induction and a distributor can be tricky. You need to remember a few things. 1- Distributors have a limited phasing range. 2- Electronic timing controls combined with mechanical advance can really screw you up. 3- 100% rotor phasing should occur at peak torque rpm/ max boost. This is where most people fail.
Last edited by TRENDZ; 09/24/10 06:33 PM.
"use it 'till it breaks, replace as needed"
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Re: about 5 minutes after start....
[Re: TRENDZ]
#812813
09/24/10 10:06 PM
09/24/10 10:06 PM
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Joined: Sep 2006
Posts: 411 Portersville, Pa
1badx
mopar
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mopar
Joined: Sep 2006
Posts: 411
Portersville, Pa
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Quote:
Glowing tubes indicates retarded timing as stated. 1 degree per 1psi is a safe way to start, but wont put you where you really should be. Your question about fuel pressure leads me to believe your regulator reference port is plumbed below the carb's throttle plates (vacuum applied to the regulator will decrease fuel pressure). Move the reference line to a place in the air stream before the carb. Timing with forced induction and a distributor can be tricky. You need to remember a few things. 1- Distributors have a limited phasing range. 2- Electronic timing controls combined with mechanical advance can really screw you up. 3- 100% rotor phasing should occur at peak torque rpm/ max boost. This is where most people fail.
What he said. 1 degree retard per pound of boost to start. Get your regulator/boost reference right. And pay particular attention to point #3. Under high cylinder pressure conditions if your phasing isn't correct the spark WILL jump to the wrong post if the rotor is far enough out of phase.
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Re: about 5 minutes after start....
[Re: royt440]
#812815
09/25/10 10:55 PM
09/25/10 10:55 PM
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Joined: Jan 2003
Posts: 28,068 Irving, TX
feets
Senior Management
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Senior Management
Joined: Jan 2003
Posts: 28,068
Irving, TX
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I don't think there's anybody near Marshall. It's just a wee little town in the grand scheme of things.
I think you'll get it with a little fiddling. Get the car to idle first and tune it from there. Don't make yourself hate life. Only change one thing at a time.
We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind. - Stu Harmon
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