Hey guys, I haven't posted on Snowest before and I have used the search button to no avail. Here is a basic run down on my setup.
800 Assault - BD Intercooled, 2860 3d box with External EBC
I have a 1000 miles on it boosted at 6.2 psi, and this year I backed it down with the adjustable wastegate to 5.2#'s. I run at 0-1000 ft, 3 degree timing module, Cold air intake,
I had to rich'n the mixture up from a 12.6 to 11.3 at WOT when I installed BD's CAI pipe. I mix my fuel 2 gallons of Sonoco Maximal 116 to a tank of fuel. I have hit DET intermittently over the last 1000 or so miles. but nothing consistent, attributed to shady 91 octane fuel- suspected of being regular(81)... When I pulled the Reeds out I noticed a small chip in one of the reeds, ordered Boyseen turbo pedals. So on to Power valves, nothing to note, except when I looked in at the piston crown there was a serious chunk missing.....
Removed motor, and stripped to find both pistons missing parts of the ring lands between the upper and lower rings, no cylinder wall damage or head damage worth noting... Four piston pieces not acounted for... Cleaned and scrapped pipe, nothing, inspected turbo, no apparent broken fins, no shaft play or scrapping.... mystery as to where they have disappeared to... Crank and rods look fine, no apparent rub marks where something had bounced around...
So I have to new slugs on the way, new base gaskets, etc... Which leads me to my next question, I'm assuming detentation is my killer, I have been doing everything in my power to keep Det to a minimum, but I can't seem to completely get rid of it.
I'm considering taking 20thou out of my Quench on the head, lower compression, opinions?
Next, could I be over octaning the motor, my solution to Det up until this point has been to throw more race gas at it. We have a large moisture content in the air here in Newfoundland, could this adversely affect my ability to control Det, I would think having a high moisture content would cause the air to be more be resistant to det.
Rebuilding my motor tomorrow, drawing at staws.....
Ken
800 Assault - BD Intercooled, 2860 3d box with External EBC
I have a 1000 miles on it boosted at 6.2 psi, and this year I backed it down with the adjustable wastegate to 5.2#'s. I run at 0-1000 ft, 3 degree timing module, Cold air intake,
I had to rich'n the mixture up from a 12.6 to 11.3 at WOT when I installed BD's CAI pipe. I mix my fuel 2 gallons of Sonoco Maximal 116 to a tank of fuel. I have hit DET intermittently over the last 1000 or so miles. but nothing consistent, attributed to shady 91 octane fuel- suspected of being regular(81)... When I pulled the Reeds out I noticed a small chip in one of the reeds, ordered Boyseen turbo pedals. So on to Power valves, nothing to note, except when I looked in at the piston crown there was a serious chunk missing.....
Removed motor, and stripped to find both pistons missing parts of the ring lands between the upper and lower rings, no cylinder wall damage or head damage worth noting... Four piston pieces not acounted for... Cleaned and scrapped pipe, nothing, inspected turbo, no apparent broken fins, no shaft play or scrapping.... mystery as to where they have disappeared to... Crank and rods look fine, no apparent rub marks where something had bounced around...
So I have to new slugs on the way, new base gaskets, etc... Which leads me to my next question, I'm assuming detentation is my killer, I have been doing everything in my power to keep Det to a minimum, but I can't seem to completely get rid of it.
I'm considering taking 20thou out of my Quench on the head, lower compression, opinions?
Next, could I be over octaning the motor, my solution to Det up until this point has been to throw more race gas at it. We have a large moisture content in the air here in Newfoundland, could this adversely affect my ability to control Det, I would think having a high moisture content would cause the air to be more be resistant to det.
Rebuilding my motor tomorrow, drawing at staws.....
Ken
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Seems to be the way, but I was reading on Dynotech about this Pinnacle EFI, providing almost instantaneous auto tuning.... I emailed the contact that Dynotech provided. But Vipec is definitely the way to go now for engine management. Going to have to place a call to Vipec... 
