Tuning only necessary at WOT?
10-23-2003, 10:17 AM
#1
Nordschleife Master
Thread Starter
Tuning only necessary at WOT?
I'll be getting some sort of piggyback and WBo2 this winter to sort out my A/F ratios.
Probably the SMT6 unit that can map on different load points.
But I'm not all that familiar with how a mapping works...
I'll probably aim at around 12.5:1 at WOT but what should I do about middle throttle/load?
The boost can rise a bit in high gears at low load and throttle, what about fuel ratios for those kind of conditions?
I want to learn more about mapping a car (want to move on to stand alone at some point in future) so please contribute with all relative links or books you can recommend!
Thanks
Gustaf
Probably the SMT6 unit that can map on different load points.
But I'm not all that familiar with how a mapping works...
I'll probably aim at around 12.5:1 at WOT but what should I do about middle throttle/load?
The boost can rise a bit in high gears at low load and throttle, what about fuel ratios for those kind of conditions?
I want to learn more about mapping a car (want to move on to stand alone at some point in future) so please contribute with all relative links or books you can recommend!
Thanks
Gustaf
10-23-2003, 10:59 AM
#2
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You need to map all across the RPM/LOAD ranges. Of course, you don't aim for the same AFR all across.
10-23-2003, 11:08 AM
#3
Nordschleife Master
Thread Starter
Originally posted by fast951
You need to map all across the RPM/LOAD ranges. Of course, you don't aim for the same AFR all across.
You need to map all across the RPM/LOAD ranges. Of course, you don't aim for the same AFR all across.
I assume the WOT table is the most important one, but a good map all across the ranges is needed to get the best drivability.
I know you sell these things John so I don't expect you to answer but it would be very interesting if someone could share some good A/F-rations to aim for at low/middle load ranges.
10-23-2003, 11:15 AM
#4
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I don't just sell the SMT6, I'm the first person to install it successfully on the 951. Now others offer it for the 951, however you don't get the support or the base chips to work with it.
To answer your question, let us know your goals: Performance, gas saver,...
To answer your question, let us know your goals: Performance, gas saver,...
10-23-2003, 11:22 AM
#5
Nordschleife Master
Thread Starter
Are you the first one to install it sucessfully on a 951? If you say so I believe you, but it sounds strange since Perfect Power has been supplying a wiring diagram for the 951 since very long.
Do you mean their wiring diagram is wrong?
Well, my main goal is performance!
BTW, If I had the money I wouldn't hesitate one second to buy from you John but I just don't have it so that's why I'm going cheap and try to fix it myself...
Do you mean their wiring diagram is wrong?
Well, my main goal is performance!
BTW, If I had the money I wouldn't hesitate one second to buy from you John but I just don't have it so that's why I'm going cheap and try to fix it myself...
10-23-2003, 11:41 AM
#6
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Who do you think supplied PP with the wiring diagram for the 951?
There are many ways to hook up the SMT6, some work better than others..
Your AFR goal is 12-13:1
There are many ways to hook up the SMT6, some work better than others..
Your AFR goal is 12-13:1
10-23-2003, 11:45 AM
#7
Nordschleife Master
Thread Starter
Originally posted by fast951
Who do you think supplied PP with the wiring diagram for the 951?
There are many ways to hook up the SMT6, some work better than others..
Your AFR goal is 12-13:1
Who do you think supplied PP with the wiring diagram for the 951?
There are many ways to hook up the SMT6, some work better than others..
Your AFR goal is 12-13:1
So you mean I should try to achieve 12-13:1 even att low load? I thought the car was sluggish with that much fuel off boost.
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10-24-2003, 05:26 AM
#8
Gustaf,
are you going to use original AFM or do you plan to move into MAF or MAP ?
At least LINK gives good possibilities to tune A/F ratios either with LINK tune module or PC.
are you going to use original AFM or do you plan to move into MAF or MAP ?
At least LINK gives good possibilities to tune A/F ratios either with LINK tune module or PC.
10-24-2003, 07:28 AM
#9
Nordschleife Master
Thread Starter
Originally posted by Olli Snellman
Gustaf,
are you going to use original AFM or do you plan to move into MAF or MAP ?
At least LINK gives good possibilities to tune A/F ratios either with LINK tune module or PC.
Gustaf,
are you going to use original AFM or do you plan to move into MAF or MAP ?
At least LINK gives good possibilities to tune A/F ratios either with LINK tune module or PC.
Olli, you have looked into the LINK system, what capabilities does it have more specifically?
10-25-2003, 08:27 AM
#10
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Mapping a motor is as individual as the differences between motors. You do not need to be real rich (.88-.82) until the boost & RPM are up there. My old APE chips were terrible for fuel mileage, esp. near pk. torque. Over compensation of fuel for lack of knowledge/research on advance curve, I guess. The lambda #'s on mine @WOT change w/each boost setting and rpm. When I use High (rarely) 20lbs. .82-.83, above 6000rpm. A little rich, probably. But damn, these turbos create high temps.
10-25-2003, 10:44 AM
#11
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I always wondered about tuning air/fuel ratios at part throttle. Doesn't the O2 sensor always keep your air/fuel around stoichiometric no matter how you tune your base maps, providing you use your o2 sensor? I'm really curious about this; maybe someone in the know could respond to this. Sorry to bust in on your thread, Duke, but you'd want to know this wouldn't you.