I'm over the depression of not yet solving the problem I'm having with head lift. I'm in the solution mode now.
I'm thinking the chamber pressures are just too high. Nothing wrong with the heads or the installation, just pressure spikes. For good measure, I'll be adding an extra 10 ft/lbs of tq to the upper row of head bolts. Then I'll be cutting the timing back to 6 degrees initial and mixing in some cam2 race gas to get the octane level up. My AF ratio is good in the mid to low 11's WOT so there is enough fuel getting in.
Maybe the tune in the chip needs to be adjusted to cut back on timing under boost. My chip was tuned by All Out Automotive. But, I changed the game after the fact. My SC kit came with a 6" crank pulley but I changed to a larger 6.87" pulley. So, I'm not criticizing All Out. Just pointing out that I changed the game. I figure by cutting back on my initial timing, if the lifting stops, it's something I can have corrected in the tune.
BTW, my setup does not use the FMU that came with the kit. I was told to omit it since everything needed is programmed into the chip tune. I have a question on the chip tune and how it gets info. How exactly does the computer know when the intake is under boost in my setup? What components is the computer getting info in order to adjust fuel under boost? I have no vacuum line referencing the intake for boost information so how does it do it?
I can run this thing all day under normal driving conditions no matter what with no problems. Only pukes under boost.
I'm thinking the chamber pressures are just too high. Nothing wrong with the heads or the installation, just pressure spikes. For good measure, I'll be adding an extra 10 ft/lbs of tq to the upper row of head bolts. Then I'll be cutting the timing back to 6 degrees initial and mixing in some cam2 race gas to get the octane level up. My AF ratio is good in the mid to low 11's WOT so there is enough fuel getting in.
Maybe the tune in the chip needs to be adjusted to cut back on timing under boost. My chip was tuned by All Out Automotive. But, I changed the game after the fact. My SC kit came with a 6" crank pulley but I changed to a larger 6.87" pulley. So, I'm not criticizing All Out. Just pointing out that I changed the game. I figure by cutting back on my initial timing, if the lifting stops, it's something I can have corrected in the tune.
BTW, my setup does not use the FMU that came with the kit. I was told to omit it since everything needed is programmed into the chip tune. I have a question on the chip tune and how it gets info. How exactly does the computer know when the intake is under boost in my setup? What components is the computer getting info in order to adjust fuel under boost? I have no vacuum line referencing the intake for boost information so how does it do it?
I can run this thing all day under normal driving conditions no matter what with no problems. Only pukes under boost.