Timing at high boost
Re: Timing at high boost (1junkycivic)
Depends on EMS, Fuel Type, Compression, Turbo Size, RPM, VE.
If your car is running 33-40 psi & you don't know the answer to this question, you should be paying some one to tune your car that does have the answers.
If your car is running 33-40 psi & you don't know the answer to this question, you should be paying some one to tune your car that does have the answers.
Thread Starter
Honda-Tech Member
Joined: Feb 2008
Posts: 647
Likes: 0
From: No Where Special
Re: Timing at high boost (mtber)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mtber »</TD></TR><TR><TD CLASS="quote">Depends on EMS, Fuel Type, Compression, Turbo Size, RPM, VE.
If your car is running 33-40 psi & you don't know the answer to this question, you should be paying some one to tune your car that does have the answers. </TD></TR></TABLE>Everyone learned from someone.Also how do you know the tune is correct from these tuners?
If your car is running 33-40 psi & you don't know the answer to this question, you should be paying some one to tune your car that does have the answers.
</TD></TR></TABLE>Everyone learned from someone.Also how do you know the tune is correct from these tuners?
Honda-Tech Member
Joined: Jan 2003
Posts: 7,277
Likes: 1
From: A Place in, Florida, USA
Re: Timing at high boost (1junkycivic)
Sooooooooo many variables. Complete setup, fuel, management, etc. <sarcasm>You could just start at 50* and work your way down 
</sarcasm>
Honda-Tech Member
Joined: Nov 2002
Posts: 3,360
Likes: 1
From: Phoenix, AZ, USA
Re: Timing at high boost (alpha)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by alpha »</TD></TR><TR><TD CLASS="quote">Sooooooooo many variables. Complete setup, fuel, management, etc. <sarcasm>You could just start at 50* and work your way down </sarcasm></TD></TR></TABLE>
Trending Topics
Honda-Tech Member
Joined: Jan 2003
Posts: 7,277
Likes: 1
From: A Place in, Florida, USA
Re: Timing at high boost (HRTuning)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HRTuning »</TD></TR><TR><TD CLASS="quote">
</TD></TR></TABLE>
Give you a call tomorrow
I'm on a temp phone 
Just to give you a small example. I tuned a Supra on a GT4788 a week and a half ago. I retuned that same Supra last night on a GT42R. The timing changed dramatically on the same gas, same motor, etc.
</TD></TR></TABLE>Give you a call tomorrow
I'm on a temp phone Just to give you a small example. I tuned a Supra on a GT4788 a week and a half ago. I retuned that same Supra last night on a GT42R. The timing changed dramatically on the same gas, same motor, etc.
Re: Timing at high boost (1junkycivic)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1junkycivic »</TD></TR><TR><TD CLASS="quote">Everyone learned from someone.Also how do you know the tune is correct from these tuners?</TD></TR></TABLE>
You learn from experience, education, trial & error etc.
You learn from experience, education, trial & error etc.
Re: Timing at high boost (1junkycivic)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1junkycivic »</TD></TR><TR><TD CLASS="quote">What kind of timing can you run at 33-40 psi?How do you figure these out if you were dumb or learning?
Modified by 1junkycivic at 12:36 PM 9/3/2008</TD></TR></TABLE>check wikipedia
Modified by 1junkycivic at 12:36 PM 9/3/2008</TD></TR></TABLE>check wikipedia
Honda-Tech Member
Joined: Nov 2002
Posts: 3,360
Likes: 1
From: Phoenix, AZ, USA
Re: Timing at high boost (1junkycivic)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1junkycivic »</TD></TR><TR><TD CLASS="quote">I figured there was no one that is man enough on here to give any useful information to help.</TD></TR></TABLE>
If you really seek knowledge and want to learn, go take a class like EFI101 or get a book on tuning forced induction. After that it's all trial and error to gain the experience anyway because no single piece advice is going to apply to every single setup you try to tune. Once you have the experience you will know how to adapt to different setups and situations. Good luck.
If you really seek knowledge and want to learn, go take a class like EFI101 or get a book on tuning forced induction. After that it's all trial and error to gain the experience anyway because no single piece advice is going to apply to every single setup you try to tune. Once you have the experience you will know how to adapt to different setups and situations. Good luck.
Thread Starter
Honda-Tech Member
Joined: Feb 2008
Posts: 647
Likes: 0
From: No Where Special
Re: Timing at high boost (HRTuning)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HRTuning »</TD></TR><TR><TD CLASS="quote">
If you really seek knowledge and want to learn, go take a class like EFI101 or get a book on tuning forced induction. After that it's all trial and error to gain the experience anyway because no single piece advice is going to apply to every single setup you try to tune. Once you have the experience you will know how to adapt to different setups and situations. Good luck.</TD></TR></TABLE>Didnt say I was going to be a tuner just want to some info on timing at high boost levels to compare to the tune i already have.
If you really seek knowledge and want to learn, go take a class like EFI101 or get a book on tuning forced induction. After that it's all trial and error to gain the experience anyway because no single piece advice is going to apply to every single setup you try to tune. Once you have the experience you will know how to adapt to different setups and situations. Good luck.</TD></TR></TABLE>Didnt say I was going to be a tuner just want to some info on timing at high boost levels to compare to the tune i already have.
Honda-Tech Member
Joined: Sep 2003
Posts: 515
Likes: 0
From: Hanover, MD, USA
Re: Timing at high boost (1junkycivic)
Well first off you need to be on the dyno and will probably start off on lower boost levels. Usually what I do is start low and dial the cams in and get the VE table correct for that particular motor. Then see what timing changes do too the motor.
In a perfect world. You would try and reach MBT for every load/rpm point. But this is very time consuming. What you can try and do is get a general fuel/timing map for one particular boost level and use that as a base point as you increase your boost levels. Retarding timing and adding fuel as you increase the boost levels.
The reason why nobody can answer your question. Is because there is no correct answer. I would say run between 10-20* timing. If thats what your looking for. There are so many variables like static compression ratio, fuel being used, cylinder head design, exhaust backpressure, cams, port shape etc.....
For someone to come on here are say yea run 12* timing and you will be at the sweet spot would be crazy.
If you can read the plugs correctly and have a good logging software and good tuning tools you need to get on the dyno and progressively tune the car. The only way too find out what your motor likes is too make incrementale changes and see what happens to power output. While keeping an eye on detonation among other things. You also need too beable to tell when the plugs are too hot or too cold of a plug for the boost levels your trying to run.
It seems alot of people come on here and basically ask the same question and expect a simple answer. Which is not the case. What you need to do is find a baseline on the motor your tuning at lower boost levels. Then progressively tune the car as you increase the boost levels.
I guess you could start a little on the low side timing wise and keep an eye on EGT's and A/F's and go from there. Some motors may like a little more timing and be fatter in the A/F department. While others might be better off leaning out and taking some timing away. You could also do a few low rpm(maybe too 6-7K) pulls and see how the motor reacts to fuel and timing changes. Then once you think you are in the area start leaning on the motor harder and take it all the way out.
At the end of the day, every motor is different and requires a different tune.
In a perfect world. You would try and reach MBT for every load/rpm point. But this is very time consuming. What you can try and do is get a general fuel/timing map for one particular boost level and use that as a base point as you increase your boost levels. Retarding timing and adding fuel as you increase the boost levels.
The reason why nobody can answer your question. Is because there is no correct answer. I would say run between 10-20* timing. If thats what your looking for. There are so many variables like static compression ratio, fuel being used, cylinder head design, exhaust backpressure, cams, port shape etc.....
For someone to come on here are say yea run 12* timing and you will be at the sweet spot would be crazy.
If you can read the plugs correctly and have a good logging software and good tuning tools you need to get on the dyno and progressively tune the car. The only way too find out what your motor likes is too make incrementale changes and see what happens to power output. While keeping an eye on detonation among other things. You also need too beable to tell when the plugs are too hot or too cold of a plug for the boost levels your trying to run.
It seems alot of people come on here and basically ask the same question and expect a simple answer. Which is not the case. What you need to do is find a baseline on the motor your tuning at lower boost levels. Then progressively tune the car as you increase the boost levels.
I guess you could start a little on the low side timing wise and keep an eye on EGT's and A/F's and go from there. Some motors may like a little more timing and be fatter in the A/F department. While others might be better off leaning out and taking some timing away. You could also do a few low rpm(maybe too 6-7K) pulls and see how the motor reacts to fuel and timing changes. Then once you think you are in the area start leaning on the motor harder and take it all the way out.
At the end of the day, every motor is different and requires a different tune.
Thread
Thread Starter
Forum
Replies
Last Post
