Boosted Performance round 2 list

Boosted Performance

That is strange because a person with an even larger turbine (same kit), and less psi is experiencing boost drop. Maybe these things are not being set properly? Just a thought I guess..however the comparison in flow between the vq37 and the V8's sure says a lot.

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Mr.Squeeze

When Vince tuned my car he set my boost controller I wonder if he set Gales when he tuned his car .

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Driven Motorsports Single Turbo 7675 T4 1.32 A/R 995WHP 780TQ

GaleForce

I was looking at your graph, no drop off at all. Vince was the one to setup my EBC for the height boost tunes.

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GaleForce

We should compare settings just for fun.

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Boosted Performance

Things are moving along very well, and it is much better making this many at once. It is a bit repetitive, but that is just the way it is.

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elperuano

I'm using the same hks boost controller as well

Boosted Performance

Maybe it is something in the settings then. I have no experience with it at all.

My 350z has a Haltech, and it has an on board EBC. With the RPM's the duty cycle is increased (when in open loop). So at 4,500 rpm I have 5% duty cycle and have it set in increments of 5% for every 500rpm after that, up to 25% at 6,500rpm. Boost is a flat line at 10psi. Very simple to set/use.

The car is making 450whp, with a rather small (compared to the 1.15 a/r twin scroll) .68 a/r open inlet turbine.

I will give Vince a call tomorrow and see if he has a bit of time to talk about it.

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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.

GaleForce

Not only did you get my numbers first, you also got the digital copy of my graph first!

Vince did explain that to me... I forgot most of it until you mentioned it again. I should hire someone to record my conversations so I can play them back later to refresh my memory.

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XwChriswX

I'll send you my resume, if you could put "Driver" under list of job requirements that would be great too.

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Bonnie - Stage 2, Audio build coming this fall!
R.I.P. Abby 3/29/10 - 3/30/14

GaleForce

Send it. I'll put it in the pile

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XwChriswX

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Bonnie - Stage 2, Audio build coming this fall!
R.I.P. Abby 3/29/10 - 3/30/14

Boosted Performance

Oh no, you can't pull that on me this time.

Vince posted the graph in your build thread. I just copied the link and pasted it here..

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GaleForce

I just found it. I'm blaming the forum, your thread showed first in my list of new threads. I'll let it go this time.

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