Boosted Performance round 2 list

Boosted Performance

So, I just spent some time on the phone with Vince.

To sum it up, the boost is nothing to worry about. The car (as you can see by the HP curve) continued to make more power with the higher boost (+50whp over spring pressure run), even though it looks like it is tapering off.

There are many variable at play (including VVEL, and the dyno MAP sensor), and since the car already made very good power, there was no need to spend a lot of time with the EBC setting to try and flatten out the boost curve. It also takes extra time to really dial in an extra few psi (small increments over base pressure) of boost with the EBC like we are trying to do here.

Vince felt like the kit performed very well and made power with ease.

Here is a better looking dyno graph as well:




So that settles it I guess.

I will still go ahead and do the test on my end to see what the exhaust back pressure is like. However, I am no longer thinking that it is a concern.

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criminalntent

VVEL is the reason for the drop in boost not the EBC. There is more valve overlap tuned into the car for higher RPM NA power, if the VVEL were retuned you could increase power by limiting boost loss. The problem is actually two part, loss of FI effeciency on the intake side due to overlap which in turn slightly effects thermal efficiency of the exhaust from the cooler air (boost).

Most 2JZ's are cammed with turbo specs to increase high RPM power but will not make the low end as the VQ. Once VVEL is perfected we will see the same results (top end) if not better than the 2JZ.