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Speed Density vs MAF

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Old Jan 22, 2007 | 10:14 PM
  #21  
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Originally Posted by Hodgesz28
The car has a 10pt cage, tubed chasis, 4 link suspension, tubed, and a narrowed ford 9inch..... I really don't think its going to be a pretzel....so either help me out on what my thread is about or stay the **** out.
I think he was trying to be funny. No need to be a ***** about it. I'm not convinced either way about an SD tune. Some of the faster guys in my area dont like an SD tune. Gonna swear at me now?
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Old Jan 23, 2007 | 08:13 AM
  #22  
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sd for the track and maf for driveabilty
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Old Jan 23, 2007 | 10:04 AM
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i would go speed density...and that car will be nuts btw
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Old Jan 23, 2007 | 12:15 PM
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Originally Posted by SERIALPIMP
How come more "Pro" tuners don't go SD ?
IMO, every tune should start with a Speed Density tune. Get your VE table dialed-in first in Speed Density mode, then add the MAF back in and re-scale if desired. If a tuner tells you he cannot or does not do Speed Density tuning, that's the number one clue to take your business elsewhere. These days, anybody with a laptop and some basic equipment can market themselves as a professional tuner and charge people for their services. However, simply charging people money for a service does not necessarily make you a "Pro".

(I am not a professional tuner, nor a "Pro". In fact, I'm relatively new to LSx tuning. However, I do have close to 20 years experience with many generations of stand-alone systems...I believe that at least qualifies me to know the difference between a tuner and a hack.)

Edit: And to stay on topic with the original post...If you've got room for it, I'd look into a carb style TB on that carb style intake...no elbow, no MAF.

Last edited by RAACCR; Jan 23, 2007 at 12:49 PM.
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Old Jan 23, 2007 | 12:16 PM
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Cleaned up some of the trash talk... keep it on topic (this goes for the topic starter also) or it will be locked
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Old Jan 23, 2007 | 02:30 PM
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Originally Posted by SERIALPIMP
From what you have said, and what others are saying it sounds like SD is the way to go,
Your White TA and your LT1 ran hard,
And while past performance is not a promise or guarantee of future performance I see a trend.

Can you recommend some specific reading for understanding SD tuning ?
I understand the parts and sensors and what role each play, but have never approached or thought about tuning at all, I worked as a tech at a dealership for a while, and we never got into any of that.
Wow so you remember me from all these years Most of my cars end up running well because I normally have a holistic approach on my modifications usually netting some good results and always well with in my budget and expertise. RedHardTopSupra, who ironically doesn't own a Supra at this time but does own a F-car has written some nice articles with great information. Hptuners forum and this forum has many other contributers that in my opinion have a more modest approach in their descriptions and make for better reads. These articles will give you some insight of how things work. I would say however that practical application is irreplaceable. Get some tuning software and get a wideband and start testing. Never have faith in anyone else's tune as what works great for them doesn't work well for everyone else. Also, don't take everything you read for granted, there is a LOT of misinformation out there. Finally, be prepared for limited help and for many reasons. One is most people don't want to take the time to help you and if they do, most of the time their help doesn't come from a altruistic focus but a self centered focus so watch out for that! Meaning, you may have a lot of unanswered posts unless it interests somebody. The semi-professional tuner guys are the guys that can help you the most but hurt you the most as well. They aren't professional in most cases but they are giving away their advice for free so it comes with no warranty and no apologies. The professionals don't typically give away information and it seems as though people are getting more and more secretive, so I find that the search function and 'viewing posts by user' sure tells the story about somebody and what they really know. If you find that this years GuRu was asking basic questions 8 months ago....well there you go, back to my take it all with a grain of salt

There was a great book I read many years ago I bought from Barnes and Noble regarding Ford ECU tuning. It really helped lay the ground work for my laymen understanding which has served me well. I'm no professional just an enthusiast.
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Old Jan 23, 2007 | 03:02 PM
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Originally Posted by jeffstar
Wow so you remember me from all these years Most of my cars end up running well because I normally have a holistic approach on my modifications usually netting some good results.

Thanks!
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Old Jan 23, 2007 | 04:00 PM
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Originally Posted by horist
Cleaned up some of the trash talk... keep it on topic (this goes for the topic starter also) or it will be locked
Thanks...... Anyways I talked to one of the guys who has tuned my car in the past and that is local and he said to stick with a MAF because if I went with SD I would need like 5 tunes because of the change in weather???

Also he swears by MAF because he still has the stock MAF and just ran a best of 9.41 @ 140+. SO he told me to get ACUFAB to make me a custom MAF and then just go from there.......????
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Old Jan 23, 2007 | 04:14 PM
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Default Quick question

just out of curiosity, has anyone ever tried unplugging the Map sensor and running the car. Just to see how this compares to SD? Or Not?
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Old Jan 23, 2007 | 04:16 PM
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i hope you mean the MAF sensor, SD will NOT work without MAP at all-zero airmass, zero airflow, zero spark

Originally Posted by yobabiesdaddy2001
just out of curiosity, has anyone ever tried unplugging the Map sensor and running the car. Just to see how this compares to SD? Or Not?
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Old Jan 23, 2007 | 04:19 PM
  #31  
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Originally Posted by jeffstar
Wow so you remember me from all these years Most of my cars end up running well because I normally have a holistic approach on my modifications usually netting some good results and always well with in my budget and expertise. RedHardTopSupra, who ironically doesn't own a Supra at this time but does own a F-car has written some nice articles with great information. Hptuners forum and this forum has many other contributers that in my opinion have a more modest approach in their descriptions and make for better reads. These articles will give you some insight of how things work. I would say however that practical application is irreplaceable. Get some tuning software and get a wideband and start testing. Never have faith in anyone else's tune as what works great for them doesn't work well for everyone else. Also, don't take everything you read for granted, there is a LOT of misinformation out there. Finally, be prepared for limited help and for many reasons. One is most people don't want to take the time to help you and if they do, most of the time their help doesn't come from a altruistic focus but a self centered focus so watch out for that! Meaning, you may have a lot of unanswered posts unless it interests somebody. The semi-professional tuner guys are the guys that can help you the most but hurt you the most as well. They aren't professional in most cases but they are giving away their advice for free so it comes with no warranty and no apologies. The professionals don't typically give away information and it seems as though people are getting more and more secretive, so I find that the search function and 'viewing posts by user' sure tells the story about somebody and what they really know. If you find that this years GuRu was asking basic questions 8 months ago....well there you go, back to my take it all with a grain of salt

There was a great book I read many years ago I bought from Barnes and Noble regarding Ford ECU tuning. It really helped lay the ground work for my laymen understanding which has served me well. I'm no professional just an enthusiast.
BEST PUT!
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Old Jan 23, 2007 | 04:41 PM
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http://www.amazon.com/s/ref=nb_ss_b/...0&Go.y=0&Go=Go

There are many books listed in the link above that could be very helpful to the guys out there that have the aptitude to learn but don't know where to start to get their basic knowledge acquired.
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Old Jan 23, 2007 | 04:48 PM
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Originally Posted by jeffstar
Wow so you remember me from all these years Most of my cars end up running well because I normally have a holistic approach on my modifications usually netting some good results and always well with in my budget and expertise. RedHardTopSupra, who ironically doesn't own a Supra at this time but does own a F-car has written some nice articles with great information. Hptuners forum and this forum has many other contributers that in my opinion have a more modest approach in their descriptions and make for better reads. These articles will give you some insight of how things work. I would say however that practical application is irreplaceable. Get some tuning software and get a wideband and start testing. Never have faith in anyone else's tune as what works great for them doesn't work well for everyone else. Also, don't take everything you read for granted, there is a LOT of misinformation out there. Finally, be prepared for limited help and for many reasons. One is most people don't want to take the time to help you and if they do, most of the time their help doesn't come from a altruistic focus but a self centered focus so watch out for that! Meaning, you may have a lot of unanswered posts unless it interests somebody. The semi-professional tuner guys are the guys that can help you the most but hurt you the most as well. They aren't professional in most cases but they are giving away their advice for free so it comes with no warranty and no apologies. The professionals don't typically give away information and it seems as though people are getting more and more secretive, so I find that the search function and 'viewing posts by user' sure tells the story about somebody and what they really know. If you find that this years GuRu was asking basic questions 8 months ago....well there you go, back to my take it all with a grain of salt

There was a great book I read many years ago I bought from Barnes and Noble regarding Ford ECU tuning. It really helped lay the ground work for my laymen understanding which has served me well. I'm no professional just an enthusiast.
Hi Jeff,

Nicely written...
Your website is also very informative and well detailed

Christian
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Old Jan 23, 2007 | 04:52 PM
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Originally Posted by miami993c297
Hi Jeff,

Nicely written...
Your website is also very informative and well detailed

Christian
Thanks Christian, I sure hope you are talking about the images because my actual website is crap. I haven't really worked on it in a few years. Soon I hope to be updating it. Trying to master American Sign Language, working full time and doing all my car stuff sure has kept me busy

How is your latest SD tune??
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Old Jan 23, 2007 | 05:06 PM
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Originally Posted by jeffstar
If you find that this years GuRu was asking basic questions 8 months ago....well there you go, back to my take it all with a grain of salt
And while I agree with everything you said, it goes without saying (though I'm saying it) that everyone has to start somewhere. The difference b/w someone you should listen to and someone you should not has more to do with whether that person has truly taken study to the theory and applications, as opposed to just repeating what's been already documented. Usually you can tell these people by the quality content of their responses or past responses (As Jeff mentioned).

To me, there's few people that deserve the title "guru." As this forum mostly comprises self learned tuners, we're all just students, in which some have studied longer or harder or both. Out of those, some have learned, innovated, and understood, while others go through the motions.
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Old Jan 23, 2007 | 05:06 PM
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Originally Posted by jeffstar
Thanks Christian, I sure hope you are talking about the images because my actual website is crap. I haven't really worked on it in a few years. Soon I hope to be updating it. Trying to master American Sign Language, working full time and doing all my car stuff sure has kept me busy

How is your latest SD tune??
Jeff,

Tons of pics very well structured, and sometime an image is more explicit than hours of reading, at least it is a very good complement to.

I like also your HP Tuner file, can follow the evolution...

My last OLSD is getting so close of very good, it is pretty amazing how this engine is tame (as long as you don't go WOT) after all those adjustments with HP Tuner, my wife drove the car today going to the mall !!! that was my best possible test...

Next step would be to go to ITB (overlap/reversion wise) but that is another story.(or will be)

Christian
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Old Jan 23, 2007 | 05:16 PM
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Originally Posted by jeffstar
If you find that this years GuRu was asking basic questions 8 months ago....well there you go, back to my take it all with a grain of salt
You'll see some of the better tuners still to this day asking questions on occassion...not everyone knows everything and sometimes you just plain get stumped on something...the great thing about the internet & forums like this is that almost always someone out there has run into the same issue. Nobody has "seen it all" in the tuning world IMO though some are getting pretty close, but knowledge is power the more of it you have the better off you'll be.

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Old Jan 23, 2007 | 05:31 PM
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Originally Posted by foff667
You'll see some of the better tuners still to this day asking questions on occassion...not everyone knows everything and sometimes you just plain get stumped on something...the great thing about the internet & forums like this is that almost always someone out there has run into the same issue. Nobody has "seen it all" in the tuning world IMO though some are getting pretty close, but knowledge is power the more of it you have the better off you'll be.

I couldn't agree more. As was stated above by another member.....we are all students (in life)....some are more willing to admit it, thats all.
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Old Jan 23, 2007 | 06:07 PM
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Originally Posted by jeffstar
The semi-professional tuner guys are the guys that can help you the most but hurt you the most as well. They aren't professional in most cases but they are giving away their advice for free so it comes with no warranty and no apologies. The professionals don't typically give away information and it seems as though people are getting more and more secretive, so I find that the search function and 'viewing posts by user' sure tells the story about somebody and what they really know. If you find that this years GuRu was asking basic questions 8 months ago....well there you go, back to my take it all with a grain of salt
Welcome to the internet where everybody with a laptop and a version of HPtuners is a tuner. How many tuners out there, pro or not, dont know or understand the fundamentals of electricity? I would bet ALOT of them. I am an ASE Master Tech with 20+ years exp. 16 years BEFORE I started tuning. Several years as an emissions/driveability specialist. I took to tuning like a fish to water. Probably half of my job as a tuner is problem solving, or diagnostics, to put it a different way.
But really its almost comical the amount of people out there as DIYers that try to diag their own stuff, tune their own stuff, when prolly 25% of my biz comes from other pro shops, not to mention the DIY stuff that people cant figure out.
I think that before ANYBODY makes a single keystroke as far as tuning, they should have some sort of certification that says they know what the **** they are doing!
The internet is a powerful tool. It makes idiots know-it-alls.
SORRY.....
PS go ahead, JEFFSTAR, check out my posts and see what stupid questions I've asked.....
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Old Jan 23, 2007 | 07:06 PM
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Originally Posted by edcmat-l1
I think that before ANYBODY makes a single keystroke as far as tuning, they should have some sort of certification that says they know what the **** they are doing!

PS go ahead, JEFFSTAR, check out my posts and see what stupid questions I've asked.....
I couldn't agree with you LESS. We are enthusiasts, this is our time, our hobbies and our money. I think everyone should have the oppurtunity to learn the things you and I have learned over the years of our passion for Automotive performance.

What you just said above is no different then saying that nobody should ever even TRY to take care of their body by working out until they get a certification in physical fitness! Rather ludicrous.....

Now I would say that a certain amount of self-education is key before you do anything new or different if you wish to have success. However I can't agree with anyone that would say a certification will be the only way you could ever learn something.

If that thought process translated smoothly then I don't see how the world would have the likes of Stephen Morrissey, Barry Diller, Janus Friis, Jeff Valdez, Matt Drudge and so forth.....

I'm glad you are steeped rich in history and tradition in tuning cars I think it's fantastic. I have another passion that I do professionally that I have chosen over this passion. I have no desire to search your threads because I'm not reviewing advice from you at this time. However, if a day comes that I do...you can bet I will take a look at what you've stated in the past and if you want to check mine, most of them are on www.cz28.com as that's where I started most of my LT1 posting back in 99. I've been modding cars and learning however since 1992 (16 first EFI Mustang )

I bet you could find some rather stupid things I've said, but I'm also not claiming to be a tried and true expert as you are claiming. I'm only claiming to be a life long student, an open minded person and an enthusiast.

I'm also claiming that I think everybody and I mean everybody has the right and given the aptituide and desire, the ability to learn how to tune their own combination. I DO NOT believe they need a certification to try and learn something new. I also DO believe that the Internet can be a great educational tool if and when used correctly. Finally, I believe that practical application and real world expereince goes so much further then any classroom will ever go.

So my advice for anyone reading this is to go out there and try to learn as much as you can but realize that being a life student is a marathon NOT a sprint. It takes time, patience and money but in the end I have found that accomplishing something ON YOUR OWN has a much better taste of victorious accomplishment then paying somebody to do things for you.

That's just my take, not facts.
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