M3 E46 Evolve Alpha-N Tune (Dyno Results)

[costask2]

Καλώς ήρθες Κώστα .
Ευχομαι γρηγορα να επισκευαστεί το αυτοκινητο κ να το χαρείς .

Σ΄ευχαριστω Βαγγελη,

πρέπει να πω ότι και με 5 κύλινδρους το αμάξι φυσούσε

[pilot]

Θα το χαρει μια χαρα στα καθιερωμενα ''βολτακια'' μας!!

[steliosm46]

Η απαντηση απο την εταιρία :



do we have any idea what the intake temperatures are on these runs or the conditions?

I can make an airbox car with alphaN run much worse than stock on my dyno also by not allowing the intake temperature to go down to ambient levels.

It is clear ignition timing is being retarded from the shape of the power curve. It is only retarded for the following reasons:

1) Too high coolant temperature
2) Too high intake temperature
Explanation of above:
There is a table in the DME which retards timing if the coolant and/or intake temp rises. If the intake temperature goes over 30degC it starts retarding quite heavily. Go over 40-50degC and it takes away 11 degrees! Then the car will have zero power.

3) Fuel bad (but you have 97 octane so should not be the case)
4) Too much knocking going on but again the shape would not be like this, it would be natural but just lower everywhere.

I have dealt with hundreds of cases on the dyno especially in the USA. The biggest problem with airboxes is the intake temperature on the dyno.

The calibration I have made is proven and works 100% every time because it has engineering to back it up which is logical.

Last question - how many runs were done?

[compactM3]

Η απαντηση απο την εταιρία :



do we have any idea what the intake temperatures are on these runs or the conditions?

I can make an airbox car with alphaN run much worse than stock on my dyno also by not allowing the intake temperature to go down to ambient levels.

It is clear ignition timing is being retarded from the shape of the power curve. It is only retarded for the following reasons:

1) Too high coolant temperature
2) Too high intake temperature
Explanation of above:
There is a table in the DME which retards timing if the coolant and/or intake temp rises. If the intake temperature goes over 30degC it starts retarding quite heavily. Go over 40-50degC and it takes away 11 degrees! Then the car will have zero power.

3) Fuel bad (but you have 97 octane so should not be the case)
4) Too much knocking going on but again the shape would not be like this, it would be natural but just lower everywhere.

I have dealt with hundreds of cases on the dyno especially in the USA. The biggest problem with airboxes is the intake temperature on the dyno.

The calibration I have made is proven and works 100% every time because it has engineering to back it up which is logical.

Last question - how many runs were done?

Οτι λεει τα βρισκω πολυ λογικα. εχω δει αυτοκινητο να χανει 25 αλογα στο δυναμομετρο μονο απο την θερμοκρασια περιβαλοντος. 2 ωρες μετα με τις θερμοκρασιες του χωρου σε φυσιολογικα επιπεδα και το αυτοκινητο μια ηρεμη βολτα στην παραλιακη, ολα ηταν οπως επρεπε να ειναι...........

[EVERGET]

The calibration I have made is proven and works 100% every time because it has engineering to back it up which is logical.

Η παραπάνω φράση μας δείχνει ότι ο Άγγλος δεν παραδέχεται και θεωρεί το πρόγραμμά του αλάνθαστο διότι "it has engineering to back it up" όπως λέει. Σίγουρα έχει βάση το γεγονός ότι η θερμοκρασία εισαγωγής επηρεάζει τις δυναμομετρήσεις, απλά οι δυναμομετρήσεις δεν είναι αυτοσκοπός αλλά το μέσο τεκμηρίωσης της αίσθησης. Και από τα προηγούμενα posts του Στέλιου καταλαβαίνω πως η αίσθηση είναι ότι το αμάξι φαίνεται αργότερο και στο δρόμο....