"The not so greatest timing vs boost thread"
Thread Starter
Drifting
Joined: Oct 2004
Posts: 1,621
Likes: 6
"The not so greatest timing vs boost thread"
So just curious on what fi guys are running for timing at what lbs of boost
needed:
alum or cast iron
CI
E85, pump, meth?
turbo, centi or PD?
huffer psi?
Final numbers?
Think thats all.
THx for sharing
needed:
alum or cast iron
CI
E85, pump, meth?
turbo, centi or PD?
huffer psi?
Final numbers?
Think thats all.
THx for sharing
Last edited by fotoboy; Nov 25, 2013 at 03:38 PM.
Melting Slicks
Joined: Feb 2006
Posts: 2,163
Likes: 5
From: Houston
Man not another one of these. All you get are comments from people who don't tune their own cars or don't know what to factor in, like the requested info above. People pop motors in these cars like it's 1985, and they're all running 250 shots on their carburated 2 bolt 350 with no WOT or window switch.
Let the guy tuning the cars who go years without breaking while being raced set the timing. /thread
Let the guy tuning the cars who go years without breaking while being raced set the timing. /thread
Thread Starter
Drifting
Joined: Oct 2004
Posts: 1,621
Likes: 6
Man not another one of these. All you get are comments from people who don't tune their own cars or don't know what to factor in, like the requested info above. People pop motors in these cars like it's 1985, and they're all running 250 shots on their carburated 2 bolt 350 with no WOT or window switch.
Let the guy tuning the cars who go years without breaking while being raced set the timing. /thread
Let the guy tuning the cars who go years without breaking while being raced set the timing. /thread
Melting Slicks
Joined: Feb 2006
Posts: 2,163
Likes: 5
From: Houston
Look at the compression thread on here. Static compression is not even half of what needs to be considered on an FI car. Just 1 of many, so why does it matter who has the highest? Same with timing.
Melting Slicks
Joined: Mar 2008
Posts: 2,412
Likes: 4
From: Houston/Dayton Texas
Hate to tell you, but a good chunk of those that you think know their **** are more full of ****. Most the "tuners" in the lsx world have been responsible for popping a good number of motors. This forum is a business, and not everything gets posted. I guess what I'm trying to say is that you could learn much more about keeping an engine together than on here. If you are unsure of the safety of your tune you'd be far better off to learn how to read plugs and make some pulls, then check.
Look at the compression thread on here. Static compression is not even half of what needs to be considered on an FI car. Just 1 of many, so why does it matter who has the highest? Same with timing.
Look at the compression thread on here. Static compression is not even half of what needs to be considered on an FI car. Just 1 of many, so why does it matter who has the highest? Same with timing.
Thread Starter
Drifting
Joined: Oct 2004
Posts: 1,621
Likes: 6
I take everything w a grain of salt. So far my junk has survived 2 yrs/6500 miles. I do know how to check plugs and when to check them during a run. I have hp tuners and monitor my stuff pretty close but Im a novice w this software and want to start tuning myself.
Racer
Joined: Jun 2006
Posts: 300
Likes: 0
From: Bishop Texas
I agree with User Name. However take this FWIW
alum or cast iron Aluminum LS3
CI 376CI
E85, pump, meth? Pump with Dual 100% Meth nozzles
turbo, centi or PD? YSI
huffer psi? 20PSI with A&A dongle/24 without
Also I am running 17Deg and the motor is 9.4 Compression with LS3 heads makes 880 with the dongle and 978Rwhp without.
alum or cast iron Aluminum LS3
CI 376CI
E85, pump, meth? Pump with Dual 100% Meth nozzles
turbo, centi or PD? YSI
huffer psi? 20PSI with A&A dongle/24 without
Also I am running 17Deg and the motor is 9.4 Compression with LS3 heads makes 880 with the dongle and 978Rwhp without.
Thread Starter
Drifting
Joined: Oct 2004
Posts: 1,621
Likes: 6
I agree with User Name. However take this FWIW
alum or cast iron Aluminum LS3
CI 376CI
E85, pump, meth? Pump with Dual 100% Meth nozzles
turbo, centi or PD? YSI
huffer psi? 20PSI with A&A dongle/24 without
Also I am running 17Deg and the motor is 9.4 Compression with LS3 heads makes 880 with the dongle and 978Rwhp without.
alum or cast iron Aluminum LS3
CI 376CI
E85, pump, meth? Pump with Dual 100% Meth nozzles
turbo, centi or PD? YSI
huffer psi? 20PSI with A&A dongle/24 without
Also I am running 17Deg and the motor is 9.4 Compression with LS3 heads makes 880 with the dongle and 978Rwhp without.
I made close to 2 lbs
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Melting Slicks
Joined: Jul 2008
Posts: 3,002
Likes: 216
From: Houston Texas
2018 Corvette of Year Finalist
2017 C5 of Year Finalist
I agree with User Name. However take this FWIW
alum or cast iron Aluminum LS3
CI 376CI
E85, pump, meth? Pump with Dual 100% Meth nozzles
turbo, centi or PD? YSI
huffer psi? 20PSI with A&A dongle/24 without
Also I am running 17Deg and the motor is 9.4 Compression with LS3 heads makes 880 with the dongle and 978Rwhp without.
alum or cast iron Aluminum LS3
CI 376CI
E85, pump, meth? Pump with Dual 100% Meth nozzles
turbo, centi or PD? YSI
huffer psi? 20PSI with A&A dongle/24 without
Also I am running 17Deg and the motor is 9.4 Compression with LS3 heads makes 880 with the dongle and 978Rwhp without.
Melting Slicks
Joined: Mar 2008
Posts: 2,412
Likes: 4
From: Houston/Dayton Texas
best advise you can ever get on tuning yourself: change one thing at at time and only in small amounts... if you do that, your never blow a motor as long as you review the logs and know when to say enoguh is enoguh.
Tech Contributor
Joined: Apr 2007
Posts: 10,924
Likes: 78
From: Forney Texas
Look up spark hook test. The great, mad scientist Dr. Phil Hoefler did this at various AFR's.
What you need to understand is optimum spark advance changes with IAT, load, ECT, fuel octane, boost, RPM, combustion chamber shape, and AFR. There's more I'm not thinking of I'm sure.
Let's say you get two of the exact same motors and hand them to two different tuners and they are both asked to put them on the same dyno and tune 4th gear from 3000-6500RPM, both at the same boost levels, same fuel, same fuel pressure, same cooling systems and intercoolers. They both tune their respective cars and add spark until it makes no more torque, yet one achieved it at 22 degrees timing and the other at 17 degrees timing. How can this happen?
What you need to understand is optimum spark advance changes with IAT, load, ECT, fuel octane, boost, RPM, combustion chamber shape, and AFR. There's more I'm not thinking of I'm sure.
Let's say you get two of the exact same motors and hand them to two different tuners and they are both asked to put them on the same dyno and tune 4th gear from 3000-6500RPM, both at the same boost levels, same fuel, same fuel pressure, same cooling systems and intercoolers. They both tune their respective cars and add spark until it makes no more torque, yet one achieved it at 22 degrees timing and the other at 17 degrees timing. How can this happen?
Melting Slicks
Joined: Aug 2004
Posts: 2,237
Likes: 9
From: Springhill FL
I personally run conservative timing while keeping it rich. For a daily driven street car I don't need every last hp. I'd rather enjoy it for a long time.
I run 14 degrees at the torque peak at 12psi. I keep the AFR in the low 11s.
TC76 custom top mount
Stock bottom/heads LS6
228R on a 112
93 pump gas(haven't added meth yet)
I ran similar timing on my P1SC/D1SC setups on my last C5 and never broke anything in front of the flywheel. Behind it was another matter of course
ISIS SUCKS FAT CHOAD
Joined: Oct 2008
Posts: 8,124
Likes: 53
From: Earth, United States
Look up spark hook test. The great, mad scientist Dr. Phil Hoefler did this at various AFR's.
What you need to understand is optimum spark advance changes with IAT, load, ECT, fuel octane, boost, RPM, combustion chamber shape, and AFR. There's more I'm not thinking of I'm sure.
Let's say you get two of the exact same motors and hand them to two different tuners and they are both asked to put them on the same dyno and tune 4th gear from 3000-6500RPM, both at the same boost levels, same fuel, same fuel pressure, same cooling systems and intercoolers. They both tune their respective cars and add spark until it makes no more torque, yet one achieved it at 22 degrees timing and the other at 17 degrees timing. How can this happen?
What you need to understand is optimum spark advance changes with IAT, load, ECT, fuel octane, boost, RPM, combustion chamber shape, and AFR. There's more I'm not thinking of I'm sure.
Let's say you get two of the exact same motors and hand them to two different tuners and they are both asked to put them on the same dyno and tune 4th gear from 3000-6500RPM, both at the same boost levels, same fuel, same fuel pressure, same cooling systems and intercoolers. They both tune their respective cars and add spark until it makes no more torque, yet one achieved it at 22 degrees timing and the other at 17 degrees timing. How can this happen?
that's why the best way to find out how much spark to give is to put it in the rollers and see what it likes. Go as high as it likes it then bsck it diwn a couple degrees.
Team Owner
Joined: Jan 2007
Posts: 29,065
Likes: 1,839
From: cookeville tennessee
I was thinking I was bad at 93 oct and meth added then my 93 with no eth in the gas. But 100 octane all the time. I do add torco also ever other tank. Robert
Last edited by robert miller; Nov 26, 2013 at 11:32 AM.
Melting Slicks
Joined: May 2007
Posts: 2,014
Likes: 48
From: Dayton Ohio
Stock ls6 with blower cam and LT headers and supporting fuel
93 Octane (no meth)
17 degrees up top
11.2 A/f
P1SC 9-10 PSI
606/531 (Dyno com)
Won't push it any harder without meth or forged bottom end
93 Octane (no meth)
17 degrees up top
11.2 A/f
P1SC 9-10 PSI
606/531 (Dyno com)
Won't push it any harder without meth or forged bottom end