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Terry @ BMS Terry @ BMS is offline
Posts: 25,618
Join Date: Jan 2008
Default 481rw stock turbo - 08-28-2013, 11:55 AM

Hey guys,

Just wrapped up some dyno testing on our E92 MT. Mods include the JB4, BB flash, BMS **, BMS DCI, CPE BOV, CPE IC, and BMS OCC. Factory catback system & midcats. $100 inline fuel pump. Spec clutch w/ steel flywheel.

Fuel for today was E85 mixed with 91 octane. Around E60. Although there is probably a few more HP in there with E70-E80. Dyno room temps were in the low 90s. Fans were pretty good.

The only changes since last time around (461rw) are on the tuning end. More advance, leaner air/fuel ratios, a slightly different VANOS curve, and some boost curve changes when the meth is flowing.

The E85 only runs were on map 7. You'll notice the timing curve was consistently a bit aggressive around 6000rpm. On the two best E85 runs the dyno tach pickup skipped a beat so be sure to look at the torque curve and not just the peak numbers.

With meth I decided to crank the boost up as much as I could. I also left the more aggressive timing curve in place. Basically, I was going for a max effort setup. And the car delivered with 481rw. On the advance to my surprise I found it was still aggressive up top even with meth flowing. This curve is going to need E70 up top + meth I suspect. I'll back it down up there for now.

Anyway, very happy to have the stock turbo dynojet record back in our corner.
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