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swarfman64 · January 22nd, 2015, 04:59 AM

Hmmmm, Im getting some serious compressor surge, I think. I'm just checking the preload on the wast gate first but I'm getting pulsing/flutter under moderate throttle. Sounds like comp surge to me. It boosts about 7psi on 100kmh cruise at 1200 deg EGT and a rich 13:1AFR. I'm actually thinking this turbo is a little on the small side. No mapping until I sort the pulsing

January 22nd, 2015, 04:59 AM	#34
swarfman64 Master modder Name: Andrew Location: Australia Join Date: Jan 2014 Motorcycle(s): TURBO gpx250 99 CB250/500rs Sherco290 Trials Indian 1911big base (replica) Posts: 138	Hmmmm, Im getting some serious compressor surge, I think. I'm just checking the preload on the wast gate first but I'm getting pulsing/flutter under moderate throttle. Sounds like comp surge to me. It boosts about 7psi on 100kmh cruise at 1200 deg EGT and a rich 13:1AFR. I'm actually thinking this turbo is a little on the small side. No mapping until I sort the pulsing __________________________________________________ [B]Come and see my turbo ninja build, dyno build and other stuff at http://swarfman64.blogspot.com.au/20...rtia-dyno.html