Alpha N Mapping Results

Uwe it would not have bothered me if he showed me 180 rwp it's how the car performs i'm interested in.

Uwe

Mine showed a shade under 200 at the wheels. Gerry has said the rwp can depend on many issues: -

1. what gear the power run is attempted in, 3rd will give more than 5th
2. how wide the rollers are apart
3. the friction from the transmision back to the rollers
4. what state the rollers are in

My curve is no curve, but a striaght line i'll post a pic soon.

Edited by 215m3

I forgot to say that the before run had a 'AMD' chip but when i installed the Alpha N i got a standard chip from Martin but with limit raised to 7800 therefore ignition timing may have made a slight difference. I thought it a bit optimistic at the time.

The subject of how accurate DYNOs is a LARGE topic !!!

Can't really answer how accurate their one is - i'm more interested in comparison between pre / post mods and i had Tobys car there to compare against as well

I know from speaking to Lester Owen that he had mapped a standard Sport Evo with Motec and got 215 at the wheels - roughly equating to 250 flywheel.

Colin

PS - Thanks for the graph Uwe

Edited by 2002SportEvo

I had my 2002 / Alpha N mapped yesterday at the same rolling road as Toby.  Before and after graphs attached (before was carried out on the same rollers last September)

Alpha N Results (flywheel): 246 BHP at 7290 and 192 lb/ft at 6000

Engine is standard Sport Evo - 7800 rev limit, custom manifold and single 3" exhaust.  Standard plenum but with 4" inlet and ITG Filter.

My torque and power curves have a couple of 'holes' at 3000 and 4000 RPM - probably due to the manifold arrangement necessary to fit an S14 into the 2002.

Mapping took about 3hrs - the final power runs were done after 3hrs running so heat could be a bit of an issue - used a full tank of optimax and covered about 90 miles on the rollers !

Note that the table of figures only gives readings at 500 rpm intervals - i got the screen capture for maximum power reading but cannot link to it - as i said, it was 246 at 7290.

The car drives much better with the Alpha N - better than the figures would have you believe.

Before

 

After

Edited by 2002SportEvo