M42club.com - Home of the BMW E30/E36 318i/iS
DISCUSSION => General Topics => Topic started by: fabe on December 28, 2009, 09:09:46 PM
-
Went for a dyno a couple of days back..
Here's the chart:
(http://img.photobucket.com/albums/v621/fabianyee/Dyno%20chart/MV7849Dyno_20091227.jpg)
I have Perfect Power SMT6 installed and tuned before. The last dyno run I went for was in 2005.
For this latest run, I didn't manage to retune the fuel maps due to faulty cable.. Few things have went in since the last run 4 years ago..
1- Nology plug cables
2- custommade RHD exhaust extractor
3- straight-flow exhaust
2 things I noticed in the chart
1- there's a dip in torque between 3,000-3,800 rpm. And based on the corresponding A/F ratio, the AFR was at the 'so-called' ideal AFR of 13. (Not sure how accurate is the CO probe). If the CO probe is accurate, then the conclusion would be the engine likes it slightly lean..
2- sharp dip at about 4,900rpm. This I believe is due to the opening of the DISA valve. Sudden rush of intake air causing the lean A/F mixture..
Anything to improve on based on this dyno chart?
-
What are your midifications those are some healthy numbers
-
Am not sure how accurate is the Dynojet but the figures are slightly higher than a E36 320i M50B20 done on the same day.
Am using a E36 M42 in an E30, engine internals untouched.
This is the list of bolt-on mods/upgrades:
- lightened M40 single mass flywheel (7.6kg)
- open pod air filter
- Nology plug cables.
- custom mandrel bent RHD extractor (http://www.m42club.com/forums/showthread.php?t=9299&highlight=)
- Perfect Power SMT6 piggy-back ECU.
Still running fan clutch and the restrictive AFM and was running RON95 fuel instead of the higher octane RON97 fuel...
oh btw, this is a newer engine with presumably lower mileage. Can't tell since the engine was bought used (scrapped and imported from Japan). Looking at the engine condition, it looked like a low miler which is usually the case when it's scrapped in Japan.
-
Did another dyno run today...
BLUE - last run in Dec 09
RED - Today's run
(http://img.photobucket.com/albums/v621/fabianyee/Dyno%20chart/MV784920101024_01.jpg)
Mod since the last dyno was tweaking the exhaust... butt dyno felt improvement after the tweak. And the chart seem to show torque improvement...
however, peak power was lower by 1+HP..
on another hand, is it possible to have 17Nm improvement without significant increase in HP.. Or the Dynojet needed a recalibration??
-
Not bad!! post your spark map...there is room for improvement for sure
-
BTW, here's a short video of the car on dyno...
http://www.youtube.com/watch?v=7BhBDmGE3UI