vp import
Sep 26, 2011, 02:19 PM
#2
VP Import will get you to mbt easily up to pretty high boost levels. It will also get you well past it without detonation if you aren't careful.
I've only tuned one car on it and that engine was very different from what I'm use to. The timing it took had me scared to go any higher, but the motor liked it so I followed it to mbt. I never got very aggressive on AFRs with it, just mid 11s. I did 1 AFR sweep at lower boost levels and it didn't respond with much change going leaner then 11.5:1. Again though, 1 sample doesn't really mean much.
It could have just been the setup, but it also had a very sharp timing vs. power curve. I had the curve well dialed in from lower boost/previous tuning and just was basically offsetting the curve as boost went up. At the 600HP level, I added 2* of timing and it picked up over 80ft-lbs across the curve. 1* more only picked up like 5 ft-lbs and 1* beyond that started showing losses everywhere. Other fuels I've messed with seemed a lot less sensitive to timing and picked up/dropped power more smoothly.
Bring a gas mask if you are dyno tuning. That stuff will ruin your day if you are breathing it during a dyno session. First time I spent about 3 hours in the dyno cell and I think it knocked my whole freshman year of college out of my memory.
I've only tuned one car on it and that engine was very different from what I'm use to. The timing it took had me scared to go any higher, but the motor liked it so I followed it to mbt. I never got very aggressive on AFRs with it, just mid 11s. I did 1 AFR sweep at lower boost levels and it didn't respond with much change going leaner then 11.5:1. Again though, 1 sample doesn't really mean much.
It could have just been the setup, but it also had a very sharp timing vs. power curve. I had the curve well dialed in from lower boost/previous tuning and just was basically offsetting the curve as boost went up. At the 600HP level, I added 2* of timing and it picked up over 80ft-lbs across the curve. 1* more only picked up like 5 ft-lbs and 1* beyond that started showing losses everywhere. Other fuels I've messed with seemed a lot less sensitive to timing and picked up/dropped power more smoothly.
Bring a gas mask if you are dyno tuning. That stuff will ruin your day if you are breathing it during a dyno session. First time I spent about 3 hours in the dyno cell and I think it knocked my whole freshman year of college out of my memory.
Last edited by 03whitegsr; Sep 26, 2011 at 02:22 PM.
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