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I still need to get my cams tuned but I dont know if i will ever have the time to go to austin and get it tuned at uprev. My exhaust cams do wierd things past 5800 rpms so I am going to disable them in the ecu at 5800 rpms to redline. You guys know for an NA build you can use vq35hr pistons for like 11.5 compression and they are a decent price from nissan.
Motordyne's 1/2 inch spacer, or Crawfords manifold would both net you more power in the higher rpm ranges.
As for the cam timing changes, was that only limited to 6600rpm on the mrev motor, compared to the Rev-up with VVT on intake and Exhaust sides, and a higher redline?
The guys at UpRev said the limitation was on the non-revup but I would assume that Rev-up would also be limited at 6600.
Well I took my car back to UpRev to retune after I pulled the intake standoff out of the motor. The car put down 294 rwhp. Much better but that is about all this motor is going to put down with my intake manifold. You can see the power the climbs strong to 6200 rpm then suddenly nose dives. Looks like its just not getting enough air flow. Hopefully the Cosworth manifold will solve this problem.
Any reason why you are running an N/A car excessively rich under WOT? 11.8 is quite a bit of fuel for no f/i. Tip in looks great but you are losing alot of power around 2100 RPM. Your graph should steadily increase and look alot less peaky.
Last edited by IntenseFab; Mar 22, 2008 at 12:23 AM.
Any reason why you are running an N/A car excessively rich under WOT? 11.8 is quite a bit of fuel for no f/i. Tip in looks great but you are losing alot of power around 2100 RPM. Your graph should steadily increase and look alot less peaky.
Actually I just ran out of dyno time. I spent most of the dyno time tuning the cam advance instead of A/F ratio. I also had a bad coil pack and bad crank position sensor at the time and I wasn't aware of the problem. It made it very difficult to tune the car. I need to go back and retune the car...the power level of the car is significantly different after fixing the coil pack and crank sensor. I am dying to know what kinda of numbers I am putting down now.
Actually I just ran out of dyno time. I spent most of the dyno time tuning the cam advance instead of A/F ratio. I also had a bad coil pack and bad crank position sensor at the time and I wasn't aware of the problem. It made it very difficult to tune the car. I need to go back and retune the car...the power level of the car is significantly different after fixing the coil pack and crank sensor. I am dying to know what kinda of numbers I am putting down now.
Awesome! Well from the sounds of things you'd hang Stillen/HKS S/C Equipped Z's
Don't know about that but the car is no slouch...been able to pull away on my friends EVO VIII that runs 110 mph in the 1/4 mile.
Would love to see how you would do in the 1/4... My best mph with my mods is 108.5.. If i can pull that with out cams, you should have some nice numbers.