to install the key my mechanic just remove the cam cover and the took the cam out. i've also had new pipes and new intercooler fitted as well but still dropping boost after 8000 rpm, it doesnt look like a boost leak, its more like the engine refuse to have any air goes in. I've got a dyno video as well and when pass 8000rpm you can hear the engine is holding. http://www.youtube.com/watch?v=eUUzYE-LPaU

Thanks again guys

 

Try a boost leak detector to locate the problem.

 

having the Key installed today, but at the same time a complete valve job was done. I will not have a accurate before and after.
Also changed the exhaust to T1R. Seems the Key could be 180˚ easily.

 

So sideways to clarify what these keys are doing, confirm for me if I have this right. Closing the valve overlap- allowing more boost to enter the combustion cycle - and net effect is higher cylinder pressures seen? And would higher positive crank pressure also be likely measured?

Also lets say your netting 10psi at the manifold, but through valve overlap your motor may only be using say 6 of that psi for example, would the key change increase both numbers or just the unmeasured 6psi figure?

 

5PM my shop called me, said am I sitting down? Chit now something else let loose? No
all good 382WHP 11.5 boost on the 4.0. At 8500 the car wanted to go higher and was still making power
for sake of the 2.2 engine He kept it at 8500. Hell I shift at 8000 or 8100 if I really need to push it once and a rare while.

Picking up car tomorrow... 11 hours Yea

 

Congrats

Yeah the f22 will take 9k rpms reliably for years in my experience. 8500rpm is a very safe/conservative rpm to take it to.

8k rpm? Shit that motor is throwing up its arms wondering where the rest of the gas is

 

I am not familiar with this positive crank pressure measurement. Please define.

Decreasing overlap keeps more of the boost in the combustion chamber.

Great results Picturepro. Just 2 degrees less overlap and big changes.

 

what were your numbers beforehand?

what kind of dyno?

good numbers either way

 

Dyno Dynamics, before was 345whp on a sick motor (59% loss #3 cylinder, 1 slightly bent exhaust valve. Several valve seats were really crushed maybe from the BAD supertech duals?
ARK 63mm to 60 dual Exhaust-good only for NA.

Several changes, valve job, Second Supertech dual springs, T1R dual, (original installer put the recirculating blow off backwards and Supertech dual springs were bad - fukingidiot)
Sideways -2˚ intake cam adjustment.

 

In other words more blow by possibility? I assume the possibility since your upping the cylinder pressure. Or is it less crank case pressure because of the timing/boost change is going into the cylinder rather then .... Do you know what I'm thinking here? Im basically asking if more strain is being put on the motor the same way adding a few more psi would be since that's in essence what the net usable result is.