kenewagner
Registered User
Took the car back to the dyno to see what kind of numbers it would produce. The car has had no modifacations other than the M112 blower. Hook up to the dyno we ran a couple of runs just to see what kind of boost it was producing. It ran about 19 to 20 lbs of boost with a 3.1 pulley. No evidence of belt slippage. Blower sounds a lot louder than the M90 it replaced. First few runs we had a problem with the tranny wanting to down shift. Remember that the last dyno I was told to mash the pedal in a smooth controlled manner. I was just flooring the pedal & it would kick down to second a few times. The tuner back out a lot of timing back to 19 degrees. Intake air temp was 71 degrees. Ran another run & blew out the passenger side head gasket at 4700 RPM. RWHP was 268 & Torque was 366 with out really get into the tuning part of the Dyno. The increase with out really tuning the engine was 30 RWHP & 16 RWTQ. It is a set back for me as I was looking for 300 RWHP which might have been there had we got the timing dialed in.
I want to thank the local guys for showing up & helping me. It was like a meet and all have volenteered to help replace my head gaskets to get it back up and running. My goal also was to give an apples to apples comparision of the M90 vs the M112. I will probably not be able to do that now. If I am going to be pulling the heads to replace gaskets than I am not going to bolt back on the stock heads. For me personally if the heads are off than its time to bolt some decent heads on remove the last restriction to the air flow. I am pleased that the blower itself performed flawlessly looks good and will be in place to produce numbers that I want down the road. I will continue to post any developments good or bad on the M112 as I run into them. I hope to have this all done in the next few months as I want to be driving this car in the spring and I will have the rest of the year to be putting together a short block for next winters project.
Ken
I want to thank the local guys for showing up & helping me. It was like a meet and all have volenteered to help replace my head gaskets to get it back up and running. My goal also was to give an apples to apples comparision of the M90 vs the M112. I will probably not be able to do that now. If I am going to be pulling the heads to replace gaskets than I am not going to bolt back on the stock heads. For me personally if the heads are off than its time to bolt some decent heads on remove the last restriction to the air flow. I am pleased that the blower itself performed flawlessly looks good and will be in place to produce numbers that I want down the road. I will continue to post any developments good or bad on the M112 as I run into them. I hope to have this all done in the next few months as I want to be driving this car in the spring and I will have the rest of the year to be putting together a short block for next winters project.
Ken