VZ SV6 - Raptor Supercharged

[Raptorsc]

Based on what I have heard select a VERY slow spool TC, something that takes around 1000rpm of engine speed to come up to pressure rather than the lightswitch pressure increase of the GT series. Doing that will make your job endlessly easier.

Torque management could be part of the issue, I am not intimately involved in the turbo thing. My tuner said from day 1 with his (now pretty extensive) knowledge of using the VCM software that turbo tuning will never happen until more tables/lines of code are uncovered within the PCM so turbo can be controlled. It is all in there, just not enough work done yet to uncover all the inner secrets. Apparently no one is feeling overly inclined yet to spend the time/money to hunt it down

You can tune a centrifugal charger with NA parameters due to the way in which the compressor delivers the air increase, but no way in the world can that be done with a turbo without MAP sensing. Everything being done here is through Air Flow Meter

[pt72supra]

Can you ask your tuner specifically why he says this, so I can talk to HP tuners to figure out what can be done?

Additionally it doesn't make a whole lot of difference, the tables are 4D tables, room for rpm X cylindermass X inlet temp X throttle position, for instance.

SO, at 5000 rpm, at 39 LBS/MIN at 131 degrees F, with 99.8% TPS you can provide a spark or injector pulsewidth look up value.

Can you be more specific about "car goes crazy on the street" too?

I'm wondering since the motor is drive by wire and they were having problems with the 2.0 Turbo Ecotec using the Bosch MED9 instead of the ME9 (D stands for direct injection) where the throttle position was closing the meter the amount of power output. I'm wondering if thats happening too.

[Raptorsc]

pt72supra

You seem to know more that I might have expected which is fine, so now its time for you to prove what you can do rather than ask me - someone who doesn't know about tuning for turbo.

The very next step for you is to get hardware onto your (or your customers vehicle) and start tuning and then in turn show how it can be done. I can assure you that as of last week it still has yet to be resolved in this country with the BOSCH PCM.

There are no answers from this end yet, they simply are not known and providing software this end is same on your end then you can join in the fun and hair tearing

As I say, here at Raptor for centrifugal SC its simply all perfect in terms of engine control, turbo - you could be the first to sort it ..........

[pt72supra]

Thanks for the response my friend. As for my incessent questions, it's due to needing to know what is going wrong so that i can do research and footwork with HP Tuners first, because I won't try it on a customer's vehicle first, I'll try it on my own, but I need this vehicle to maintain it's reliability.

So when you say it goes crazy, can you describe the symptoms to me? I'm not ready to be thrown into the ring yet, I need to learn more and honestly you're the only person/company that has made anything worthwhile FI wise (that's a compliment btw). So you are my only resource. I'm not in any competition with you in any way shape or form and I won't be able to purchase any hardware from you gyus due to costs unfortunately

I need to learn more, I haven't worked on ANY of the Bosch ME9 series comptuers, and I know they are nuts! last GM I tuned was my GTP.

My guess right now is that when the turbo hits, its making too much torque and at that point we have a problem with the bosch, due to it being a torque based computer such as the turbo ecotec. I know that it modulate the TB and other parameters so. Who knows. Maybe disabling VVT would be useful...

Hrm.

Could you put me in touch with somone who is trying to develop for turbo systems maybe we can work together?

[monaro327]

Mate you'd be best to get on the HPtuners forum and ask about the project Raptor is not really envolved in the project and he's also not a tuner, i'd guess he's an engineer and by the sounds of what he said you seem to know more about tuning then him as such you'd be best speaking direct with Chris from HP tuners as he is directly envolved with the project over here down in Victoria.

[Raptorsc]

^^^^^^^^^^^^ well said^^^^^^^^^^^^^


I bet any money that at this stage whoever cracks the turbo tuning through the BOSCH PCM will hold their cards very closely to their chest, its proving to be quite an effort

[pt72supra]

At least the CSC sounds like it would be more reliable, and save the tranny, rather than have a huge torque spike it would keep the torque nice and level...

Raptor, do you have access to silent drive CSCs?

[Raptorsc]

pt72supra

What kind of silent drive brand are you offering/referring to?

[pt72supra]

I don't know the brand, but they make silent drive CSCs, because CSC are obnoxiously loud and not in a good way, so I'm pretty sure Procharger makes some quiet ones. You know how loud some CSCs can be at idle etc...

[Raptorsc]

You mean like the V1 S/T trim chargers that you could hear half a mile away?

[pt72supra]

Yeah, haha. I'm not quite up on my CSC nomenclature, but I'd like to know what flows real well and thats quiet. I'm eventually going to need a CSC that will breathe real well, due to head and intake manifold work. You guys running A/A or W/A for street apps?

[Raptorsc]

We have been using exclusively ATA, now going WTA with liquid cooled compressor covers on the CSCs as well for very low discharge temps.

[pt72supra]

Ive done a bunch of research on W/A. It seems that it's quite difficult to find a radiator that will pull all the heat out of the water once it's gotten hot, water holds 4 times the amount of heat energy, so It's difficult to get it back to ambient.
Anyways, are your chargers quiet man?

[Raptorsc]

WTA is awesome, have been using them on some applications for the last 2 years and in all cases we have the heat exchanger being cool to touch even in hot weather, certainly been easy enough to get back to ambient in our hot climate.

They are relatively quiet but not silent, always a whistle, its quite loud for a few weeks then quietens down significantly

[Raptor Charged VX]

the grove in the pulley has taken some of the whistle away

[Raptorsc]

Yes I was hoping so, yours should be really settling in just nice by now

[Raptor Charged VX]

yeah its running great with the new exhasut, looking for some rockers now. before swappin the motor over for a rebuilt one with all the fancy bits.

[Raptorsc]

Rockers are the Ecotec's best friend

[pt72supra]

Hrm everyone here in the states tells me to stay away from WTA for street apps.

[Raptorsc]

Based on our own experience I know that WTA is without fault in Australian conditions and this is in direct comparison to ATA which we also have experience

[impulsesv6]

i dont wanna do this but unfortunately due to family circumstances the charger kit is up for EOI...

charger, bracket, pipework, intercooler, injectors, base tune, custom catchcan, brackets for the pwr steering resi, drive belt, idler, coolant overflow bottle, 3" intake and new 4" intake and all that...

pic with the extra new goodies stainless catch can, 4" intake pod and bracket (intake not shown), pwr steer resi...

taking genuine interest only via pm..

[XStatic64]

_________________________

[impulsesv6]

a few picture updates:







3rd gear dyno run:




all tuned with the 4" intake

[Raptorsc]

Thats it right there, no cheaper way to get a full intercooled system for the Alloytec, looking sweet as too.

[Harey]

Very nice setup! Quite low boost too