>>>>>Puckshaw's Boosted Performance Twin Scroll Single Turbo Build<<<<<

COSMO · 12-19-2013, 10:53 AM

Can't you just turn the gain down on your boost controller?

SPOHN · 12-19-2013, 11:23 AM

Quote:

Originally Posted by cosmogirl

Can't you just turn the gain down on your boost controller?

You know all about that?

I had to man. Couldn't resist.

puckshaw · 12-19-2013, 11:26 AM

Quote:

Originally Posted by cosmogirl

Can't you just turn the gain down on your boost controller?

You can't run less than waste gate pressure.

puckshaw · 12-19-2013, 11:27 AM

Quote:

Originally Posted by SPOHN

You know all about that?

I had to man. Couldn't resist.

That's cold

All in good fun, Cosmo

Dzel · 12-19-2013, 11:46 AM

Wow! LOL

Sent with TapAhoe

puckshaw · 12-19-2013, 11:50 AM

Quote:

Originally Posted by FireDan50

I tried DashCommand to read boost also...got crazy numbers :P Don't know why it isn't accurate. Kit sounds good man. Almost makes me want to get my open-pipe external wastegates plumbed into the exhaust. Mine is so loud I can't hear the turbo lol.

So I've been noodling on this and might know why the boost reading is off. Ideally it would calculate boost using the SAE.MAP PID but that's not available on our car. So instead it calculates CALC.MAP using SAE.MAF, SAE.IAT, SAE.RPM, CONST.ENGINE_DISPLACEMENT, and CONST.VOLUMETRIC_EFFICIENCY. Since the SAE parameters are all available, we just have to put in the engine displacement (which is straightforward) and the volumetric efficiency in the vehicle settings. The tricky one is the volumetric efficiency. There are rough calculations you can do if you have your peak torque value. I'll have that after the tune tomorrow. I can calculate it off of my baseline run but that's not accurate with the turbo now installed. I might play with it a little tonight to see if I can dial it in by trial and error.

GaleForce · 12-19-2013, 11:53 AM

Quote:

Originally Posted by Chuck33079

First gear is kind of self-limiting in that since the engine doesn't really see enough load to hit full boost. You'll break the tires loose first. In second gear my tires break loose at wastegate pressure, so no boost controller is going to help too much there. Just go ahead and get rid of the idea that there's any traction in first and second.

And most of third...

I'm on Michelin PSS 305's

m3chhawk · 12-19-2013, 11:54 AM

Have them measure boost on the dyno and then calibrate the volumetric efficiency as they do dyno runs.

puckshaw · 12-19-2013, 11:58 AM

Quote:

Originally Posted by m3chhawk

Have them measure boost on the dyno and then calibrate the volumetric efficiency as they do dyno runs.

Yeah I was basically going to use the max boost from the dyno runs as a target and adjust the VE to match it. Just curious, how do they measure boost for the dyno runs?

m3chhawk · 12-19-2013, 12:00 PM

Never done/seen it before, but I would assume they just tee the source on the charge pipe.

elliotty · 12-19-2013, 12:11 PM

Quote:

Originally Posted by puckshaw

Yeah I was basically going to use the max boost from the dyno runs as a target and adjust the VE to match it. Just curious, how do they measure boost for the dyno runs?

They will T-into whatever boost reference source is available (probably charge pipe).

Have you ruled out adding a boost gauge/sending unit of some sort? I really like the idea of having a measure of boost at the intake manifold separate from any calculations or ecu interpretations so that I know exactly what the engine is seeing. I have mine tapped into the rear of the intake manifold, which was very simple. Just my

Chuck33079 · 12-19-2013, 12:12 PM

Quote:

Originally Posted by elliotty

They will T-into whatever boost reference source is available (probably charge pipe).

Have you ruled out adding a boost gauge/sending unit of some sort? I really like the idea of having a measure of boost at the intake manifold separate from any calculations or ecu interpretations so that I know exactly what the engine is seeing. I have mine tapped into the rear of the intake manifold, which was very simple. Just my

puckshaw · 12-19-2013, 12:22 PM

Quote:

Originally Posted by elliotty

They will T-into whatever boost reference source is available (probably charge pipe).

Have you ruled out adding a boost gauge/sending unit of some sort? I really like the idea of having a measure of boost at the intake manifold separate from any calculations or ecu interpretations so that I know exactly what the engine is seeing. I have mine tapped into the rear of the intake manifold, which was very simple. Just my

I haven't ruled it out. I was hoping the electronic gauges would work better. PLX does make a boost sensor module that I could hook up and use that value instead of a calculation. It just sucks because I have the original kiwi wifi and would need to get the newer one to hook up the sensor. I might just bite the bullet and do that though if I can't get an accurate reading from the calculation method. You're really never 100% sure with readings anyways. I had a boost gauge on my STi that was off by a couple psi too. My tuner called the gauge "optimistic".

Chuck33079 · 12-19-2013, 12:24 PM

Quote:

Originally Posted by puckshaw

I haven't ruled it out. I was hoping the electronic gauges would work better. PLX does make a boost sensor module that I could hook up and use that value instead of a calculation. It just sucks because I have the original kiwi wifi and would need to get the newer one to hook up the sensor. I might just bite the bullet and do that though if I can't get an accurate reading from the calculation method. You're really never 100% sure with readings anyways. I had a boost gauge on my STi that was off by a couple psi too. My tuner called the gauge "optimistic".

My boost gauge is off by .2 psi.

There's a lot of guys selling gauges and stuff since they're changing their mind on boost. You might be able to vulture a gauge for cheap.

FireDan50 · 12-19-2013, 12:25 PM

Post up if you ever figure out the DashCommand settings...would be nice to use that. I'm running Ventus RS-3 305/35/19 on the back and have a hard time keeping good traction when driving hard 1-3 gears in low 60F temps....really have to be sensitive w/ the throttle and pay attention to the boost coming on. I had 295 Michelin PSS just a couple months ago and they weren't any better...having an aftermarket differential helps a little I think.

12-19-2013, 11:46 AM	#140 (permalink)
Dzel A True Z Fanatic Join Date: May 2011 Location: Midland, TX Posts: 3,884 Drives: 11 370Z PW M6 Rep Power: 22	Wow! LOL Sent with TapAhoe __________________ 10secWS6 IF YOU CAN'T SWING IT THEN DON'T BRING IT! Check out Domestic Performance C.C.

12-19-2013, 11:54 AM	#143 (permalink)
m3chhawk Track Member Join Date: Sep 2012 Location: Kansas City Posts: 878 Drives: '11 370Z SPT 6MT BLK Rep Power: 24	Have them measure boost on the dyno and then calibrate the volumetric efficiency as they do dyno runs. SPOHN likes this. __________________ F.I. CF CBE \| Avant Garde M310 \| BC BR's \| ONEighty \| Status \| EvoR \| Stillen \| Whiteline \| B&M \| Bespoke Details Boosted Performance \| Precision Turbo \| Tial \| HKS \| Innovate Motorsports \| Bosch \| Treadstone \| Walbro \| UpRev \| Depo

12-19-2013, 12:00 PM	#145 (permalink)
m3chhawk Track Member Join Date: Sep 2012 Location: Kansas City Posts: 878 Drives: '11 370Z SPT 6MT BLK Rep Power: 24	Never done/seen it before, but I would assume they just tee the source on the charge pipe. __________________ F.I. CF CBE \| Avant Garde M310 \| BC BR's \| ONEighty \| Status \| EvoR \| Stillen \| Whiteline \| B&M \| Bespoke Details Boosted Performance \| Precision Turbo \| Tial \| HKS \| Innovate Motorsports \| Bosch \| Treadstone \| Walbro \| UpRev \| Depo

12-19-2013, 12:25 PM	#150 (permalink)
FireDan50 Track Member Join Date: Mar 2012 Location: San Antonio Posts: 714 Drives: '09 370Z PW M6 Rep Power: 19	Post up if you ever figure out the DashCommand settings...would be nice to use that. I'm running Ventus RS-3 305/35/19 on the back and have a hard time keeping good traction when driving hard 1-3 gears in low 60F temps....really have to be sensitive w/ the throttle and pay attention to the boost coming on. I had 295 Michelin PSS just a couple months ago and they weren't any better...having an aftermarket differential helps a little I think. __________________ VSR Single-turbo kit: 611hp/517tq @ 10psi (Q16 race gas) Dan's VSR top-mount turbo 370z

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12-19-2013, 10:53 AM	#136 (permalink)
COSMO A True Z Fanatic Join Date: Dec 2012 Location: FL Posts: 1,816 Drives: 2012 Touring GTM TT Rep Power: 19	Can't you just turn the gain down on your boost controller?