540/B&M 250 Issue
09-20-2013 | 03:26 PM
#41
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Joined: Jul 2004
Posts: 11,332
Likes: 73
From: chicago
Wow, this is getting deep.
While we are at it, lets skip over fresh plugs, fuel pressure check, ignition coil etc. I think you should tear the engine apart again. Maybe the crankshaft was installed upside down. or maybe the wrist pins are .000001 to tight.
Someone mentioned a valvetrain problem, because "the blower is making boost". Why wouldn't it make boost? A roots blower will make boost dependent on throttle position, even if there is no fuel, spark, or RPM. At 2500RPM, if you mash the throttles under load it should go to max boost.
While we are at it, lets skip over fresh plugs, fuel pressure check, ignition coil etc. I think you should tear the engine apart again. Maybe the crankshaft was installed upside down. or maybe the wrist pins are .000001 to tight.
Someone mentioned a valvetrain problem, because "the blower is making boost". Why wouldn't it make boost? A roots blower will make boost dependent on throttle position, even if there is no fuel, spark, or RPM. At 2500RPM, if you mash the throttles under load it should go to max boost.
09-20-2013 | 03:48 PM
#42
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Joined: Jan 2003
Posts: 6,020
Likes: 1,522
From: Grand Rapids, MI
Don't know, maybe miscommunication, email overlooked, I have no clue. I knew what they were from the hours of communication Bob and I had, but I did not have the actual cam cards. I guess it was just a good learning experience for me cause Valako taught me how to degree everything and set my engines up. (teach a man to fish, lol) My engines turned out exactly how we spec'd them and everything was spot on.
09-20-2013 | 10:51 PM
#43
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Joined: Oct 2007
Posts: 8,439
Likes: 94
From: yorkville,il
There were no cam cards in the boxes. There was a single card emailed to me that was used to degree both cams. I wasn't there to witness the process but have confidence in the builders ability. Hell maybe he was having an off day and DID infact fuk it up. Either way I posted this seeking input BEFORE I go the route of pulling the engine back out. Not to get blasted for making a simple comment. We can put this one to bed. Peace Out!
