Boosted Performance V 2.0 turbo list

jwick

I do not run one. My fuel pressure stay pretty rock solid expect at idle when it runs high.

You can fix the high idle pressure by doing the Venturi diameter drill out procedure in Phunks ultimate fuel pump thread.

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'10 G37T 6MT Graphite/Graphite - BP - G37T Build

instroke

Going to try to get this done before our winter hits here - Thx Phunk, Jwick, Mitco for all the help.

The Ecutek tune from Seb/Greg partnered with Sasha Boosted Performance kit really bring my Z to the next level of enjoyment. If I had the dyno numbers to be part of the 500 club that would be the icing on the cake - but I am enjoying my Z just as it is...

Greg @ SpecialityZ - thanks for the clutch pedal adjustment too!

Mitco39

58PSI at 0 psi of boost, and ~70ish at boost . My stock system was droppign into the 36-40 range stock. Now even with my Areomotive 340 my fuel pressure sits at an even 52-53PSI (I hooked it up to a 1:1 with a vac/boost source).

I drilled out my venturi as well.

I was very close to building my bottom end till I started to realize the only way I would really get to use it is if I was running race fuel or E85. I am pushing our 94 octane about as far as Ill ever get it, I mean you could lower the compression but I love the responsiveness of the engine out of boost and I wouldn't want to lose that. This kit now has 25,000miles on it and is still going strong.

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2007 Chevy Duramax - EFILive Tuned By Me
2010 40th W/ Nav - Boosted Performance - UpRev Tuned By Me
The Mrs. Ride -2012 335XI N55 BMW - Cobb Tuned By Me, Built by her
My Build --> http://www.the370z.com/members-370z-...39s-build.html

phunk

A VVEL engine should really have the regulator hooked up to only a boost source, with no vacuum, before the throttle bodies. Its not the end of the world, but your closed loop cycle will be really struggling to keep A/Fs in check during steady load cruising.

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Mitco39

I know thats what you suggested, and I was going to swap it back (switched it to this when I was having all sorts of pressure issues) and there have been no ill effects at steady state the pressure stays even +- 1-2psi. If I start to have issues I will put it back. I never looked at my trims yet but when im do that will give me a better idea on what the system is doing.

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2007 Chevy Duramax - EFILive Tuned By Me
2010 40th W/ Nav - Boosted Performance - UpRev Tuned By Me
The Mrs. Ride -2012 335XI N55 BMW - Cobb Tuned By Me, Built by her
My Build --> http://www.the370z.com/members-370z-...39s-build.html

phunk

The VVEL system will run the engine at as little as zero vacuum during steady state cruising. You fuel pressure will swing around about 10psi up and down if you are watching it at the right time. Whether it bothers you or not just depends on your expectations of the tune and its consistency. With a VVEL engine, manifold vacuum is not a consistent or linear measurement of engine load. With that relationship broken, the only way you can gain true repeat-ability of the fuel pressure is to take the vacuum out of the equation. It wont hurt the engine or even matter during full throttle... it would basically just be like a little gremlin sitting in your engine bay turning your fuel pressure up and down when cruising down the road.

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TopgunZ

So if we have a regulator open to atmosphere should we put it on a boost reference?

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ROTREX SUPERCHARGER TUNER KITS - $6799/ CUSTOM STILLEN AIR TO AIR KITS -$2100/ 700+ WHP!! WWW.TOPGUNSPEEDWORKS.COM

Mitco39

You dont need to hook up the boost ref, and if you do you will need a retune because you will start to run very rich in boost if the car was tuned without it.

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2007 Chevy Duramax - EFILive Tuned By Me
2010 40th W/ Nav - Boosted Performance - UpRev Tuned By Me
The Mrs. Ride -2012 335XI N55 BMW - Cobb Tuned By Me, Built by her
My Build --> http://www.the370z.com/members-370z-...39s-build.html

phunk

It wouldnt matter unless you run out of fuel... My 370z still has never had a line to the regulator, just 52psi pressure full time, even at 12 psi

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VitViper

Are you guys willing to sell the kit without the turbo/wg/bov? We have our own preference on turbo options and prefer Turbosmart to Tial items.

ANMVQ

I still keep reading this hope there would be a solution for the auto guys. Great stuff tho.

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14 Q50 AWD, ARK, ECUTEK (SEB), Takda,

jwick

There is, buy a manual...

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'10 G37T 6MT Graphite/Graphite - BP - G37T Build

instroke

Phunk - so why do some Z's require a fuel return system and some do not?

ANMVQ

Tell then to make a manual AWD sedan

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14 Q50 AWD, ARK, ECUTEK (SEB), Takda,

phunk

Some guys just need more fuel than others! It all depends on individual goals and needs. There is no clear crossover point where it becomes absolutely necessary, but it does eventually become necessary for most. Those making high power without one would generally find themselves in better shape to have it. Someone could say that they have 600rwhp with no return system, but that doesnt mean it shouldnt have one... fuel pressure is going to drop towards redline when you are looking at that type of flow through stock plumbing especially when the pressure is regulated before rather than after incoming flow restrictions. Most tuners will find fuel pressure drop to be unacceptable because any system that is performing beyond its limits is going to lack consistency and without consistency in your fuel system you cannot really consider the setup to be truly dependable.

All aside from that, nobody ever really considers how efficiently their individual car is consuming and burning the fuel that its supplied. If two E85 370zs are running identical builds but one is tuned to 17 degrees timing and the other is tuned to 23 degrees timing, you are looking at 2 cars producing a variance of 75-100hp out of the same exact fuel volume. Timing is only one of countless values that can effect the engines ability to efficiently turn fuel into horsepower. Odds for or against you can reach the end of a fuel system a couple hundred HP apart. Some guys think a Walbro 255 can only support 400rwhp but I have seen them make 670rwhp! Its all over the place.

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