443 replies to this topic

[The Batman]

What stops obd tuner customers buying the rights then dropping it off at a reputable tuner for them to use the software to put a map on the car

  What do you mean with rights? Just buy the software and let the tuner do the learning session work?

Sorry used to talking about cs maps

[Captain Vimes]

 

No, you need to ask Peter

 
I emailed him, but no response yet.
 

 
[font="arial;"]From Peter:[/font]
 
[font="arial;"]Dial down when using a tmap is lineair with 0,086 degree of detonation for every degree of iat as from 57.[/font]
[font="arial;"]So at 80 degrees of IAT, that is about 2 degrees of detonation.[/font]
 
[font="arial;"] Without a tmap, the dialdown is just set "earlier" (no numbers mentioned) due to safety as the heat inside the manifold is unknown.[/font]

Assume you mean degrees of retardation. Not detonation. .

[smiley]

Yes

[CHILL Gone DUTCH]

 

No, you need to ask Peter

 
I emailed him, but no response yet.
 

 
[font="arial;"]From Peter:[/font]
 
[font="arial;"]Dial down when using a tmap is lineair with 0,086 degree of detonation for every degree of iat as from 57.[/font]
[font="arial;"]So at 80 degrees of IAT, that is about 2 degrees of detonation.[/font]
 
[font="arial;"] Without a tmap, the dialdown is just set "earlier" (no numbers mentioned) due to safety as the heat inside the manifold is unknown.[/font]

Assume you mean degrees of retardation. Not detonation. .

That interesting as when I was adding ignition I found I could go further without adding power or knock
So if I go further advance on the ignition I don't attract knock I could possibly keep power at higher temps

Edited by CHILL Gone DUTCH, 23 June 2014 - 07:56 PM.

[Bargi]

bit of an update. went for a drive on Sunday with stop start traffic and some motorway, inlet temps varied between 60 and 85 degrees, CC coolant temp never went above 38 degrees.

 

Thought I'd log the car from cold start for a while to see what temp it would base at, which was 60 degrees.

Found the Inlet Temp Voltage jumped up after just over 4 minutes.after starting, didn't seem to affect the IAT much though.

Unusual or something to do with the warm up finishing?

 

 

[techieboy]

Can't see how the voltage can suddenly increase by a factor of 3 and the ° barely change. AFAIK TMAP's are linear.

[Bargi]

From reading the thread so far are we saying the high IATs are OK as long as the car isn't detonating which at low load is fine?

So checking the same against some power runs would be the next step?

 

 

Is there anyone out there with a SC and TMAP sensor that can log some low load driving to compare IATs?

It'll either put my mind at rest or point to a problem somewhere?

[CHILL Gone DUTCH]

ive just found this one ?

 

[CHILL Gone DUTCH]

Is it possible that there is two sets of voltage ranges The voltage what ever it is just gives a signal for a particular temp

[fezzasus]

Here's a thought, is there a trigger coolant temp that starts measuring inlet temperatures? Before that the car will be running on a high fuel start map anyway.

[techieboy]

Sounds feasible.

[Mangham54]

Double post.

Edited by Mangham54, 24 June 2014 - 07:56 PM.

[Mangham54]

Here's a thought, is there a trigger coolant temp that starts measuring inlet temperatures? Before that the car will be running on a high fuel start map anyway.

No link with the timing of when the second lambda switches off the heater circuit? No real idea of sc setups, but the 10min timing sounds similar to the changeover point for the lambda circuit.

[slindborg]

Or the calibration curve for the iat isn't right (or it is right as Bosch sensors do have a keen curve to them).... Eg it could ramp the voltage by a factor of 3 to only get a few deg change.

[techieboy]

I'm sure the 2.5bar TMAP I hooked up to the data logger had a normal linear response that I had to add into the logging software. Will see if I still have any of the specs.

 

[techieboy]

 

[Steve.i.am]

Looks to me like temp follows voltage difference from 2.5v. It just seems to swing polarity at some point for some reason.

[CHILL Gone DUTCH]

It's worth mentioning that the two graphs that me and bargi have put up are from start up

[CHILL Gone DUTCH]

Mine was probably a few mins after

[oakmere]

Dose any other parameter change at the same time like you go from open loop to closed loop at that time? Could it be that the initial ambient temp is used as a reference for the open loop warm up and the t-map data is not used until a certain engine temp is reached?