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Chevroletfreak
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Post subject: Couple of tuning questions....  Posted: Mon Feb 18, 2008 4:06 pm |
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| No Life |
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Joined: Sat Mar 04, 2006 7:03 pm
Posts: 1007
Location: Oklahoma, USA
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My car occaisionally goes to a no start condition as it is again. I have to jump the car because the batt is low. I did a couple of logs and my questions are:
How fast does a typical LS1 have to turn (from the starter) to start?
Also, is 13 degree spark advance acceptable for a cold start?
_________________
My name is Brian and I have a SSickneSS
Black 01 6spd SS # 5971 - AFR, FAST, Nick Williams, SLP, Kooks, Borla, Kirban, Spec, Moser, BMR, Spohn
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Garry
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Post subject: Re: Couple of tuning questions.... Posted: Mon Feb 18, 2008 4:22 pm |
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Joined: Sat May 26, 2001 9:59 pm
Posts: 7823
Location: Bad Hersfeld, Germany
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As for starting, my Hawk fires up just about instantaneously, even after sitting at the storage for 3 months ... guess with a decent tune and a moderate cam it should still be that way, though it may be a bit harder when cold ...
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Garry Glendown * '99 Firehawk Convertible
"Horsepower is how fast you hit the wall and torque is how far you take the wall with you."
"Speed doesn't kill - suddenly becoming stationary on the other hand ..."
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Chevroletfreak
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Post subject: Re: Couple of tuning questions.... Posted: Mon Feb 18, 2008 4:23 pm |
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Joined: Sat Mar 04, 2006 7:03 pm
Posts: 1007
Location: Oklahoma, USA
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What is your advance at startup?
_________________
My name is Brian and I have a SSickneSS
Black 01 6spd SS # 5971 - AFR, FAST, Nick Williams, SLP, Kooks, Borla, Kirban, Spec, Moser, BMR, Spohn
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Roy
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Post subject: Re: Couple of tuning questions.... Posted: Mon Feb 18, 2008 8:14 pm |
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Joined: Sun May 27, 2001 2:52 pm
Posts: 5556
Location: Mehlingen,Rhineland Pfalz, Deutschland
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Brian your crank timing is temperature dependent . At this temperature we have been having 13 degrees advance is enough.
If your cranking voltage drops below 10.5 volts , you will be hard pressed to start your car.
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Roy
My vids on Youtube
My vids on Streetfire
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Chevroletfreak
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Post subject: Re: Couple of tuning questions.... Posted: Mon Feb 18, 2008 9:03 pm |
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Joined: Sat Mar 04, 2006 7:03 pm
Posts: 1007
Location: Oklahoma, USA
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After looking at my logs, I finally figured the temp thing out. Thanks for the confirmation.
Yeah, I am definately going below 10.5 volts even with my beater jumping it. I guess I will get my truck over to try again tomorrow.
_________________
My name is Brian and I have a SSickneSS
Black 01 6spd SS # 5971 - AFR, FAST, Nick Williams, SLP, Kooks, Borla, Kirban, Spec, Moser, BMR, Spohn
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98blkbrd
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Post subject: Re: Couple of tuning questions.... Posted: Tue Feb 19, 2008 8:04 pm |
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Joined: Sun Jun 24, 2007 1:44 pm
Posts: 84
Location: Ramstein AB, Germany
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Brian ...... spend the money on a new batt.. your going to fry your starter cranking it like you are....
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98 T/A, A4, T-Top, Black w/ slvr accent
FTRA, Whisper Lid, 160stat, SpeedInc. Dyno Tune, Moser 12blt 3.73's
BMR--STB, Torque Arm, SFC, LCA, Adj. PHB.
ZO6 SLVR 17X9.5 on all4, Kuhmo, Koni sngl adj., Eibach 1.5drop, PowerSlot Rotors,Hawkpads
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Chevroletfreak
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Post subject: Re: Couple of tuning questions.... Posted: Tue Feb 19, 2008 8:11 pm |
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Joined: Sat Mar 04, 2006 7:03 pm
Posts: 1007
Location: Oklahoma, USA
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It is a new battery. 900CCA. I guess the problem is just from it sitting there. I did try to jump it with the truck tonight, but it just won't do it. I guess I lost another set of plugs. RRRrrrrrr.
_________________
My name is Brian and I have a SSickneSS
Black 01 6spd SS # 5971 - AFR, FAST, Nick Williams, SLP, Kooks, Borla, Kirban, Spec, Moser, BMR, Spohn
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edcmat-l1
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Post subject: Re: Couple of tuning questions.... Posted: Sun Mar 02, 2008 3:18 pm |
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Joined: Wed Jan 16, 2008 11:32 pm
Posts: 74
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If you have enough battery power to keep the computer running, and logging, it should start. In other words, if your scan data isnt interupted during cranking, you should have enough battery power to start the car. It could be a tune issue.
When I get over there, we can try it from a cold start.
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http://www.thehpfactory.com
EFI tuning
LS/LT specialists
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sven
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Post subject: Re: Couple of tuning questions.... Posted: Thu Mar 06, 2008 7:24 am |
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Joined: Mon May 13, 2002 2:37 pm
Posts: 612
Location: Renton, Washington, United States
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If it does not fire up instantly, and strongly, something is wrong, and repeatedly trying to start it does nothing. Do not keep trying to start it. Make sure you do have a good battery.
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1999 GM LS-1 T/A
2005 Suzuki GSX-R 1000
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