E-85 on a stock 370z?

JeffP-Z

So regarding injector sizing. I see lots of different sizes on injectors being referenced in this thread alone. Is there a right or wrong size to increase to from stock? If I were to change to 1000cc or 1500cc injectors would that cause a problem on pump gas (93)? Ultimately I would like to be able to run E85 for track days or performance and 93 for general driving. I have already been tuned on 93 for the setup I currently have, but I am about to install the Berk test pipes this weekend, which I assume will require additional tuning and so I would like to get 2 maps done when I have it retuned. That being said, I know I will need to go get some injectors then and I am trying to learn more about the appropriate sizing for now and possibly future expansion. Down the road I will eventually be installing Twin Turbos (Most likely the AAM kit from what Houston Z aka SZRPro is recommending) and want to make sure that I am not wasting my money now and have to purchase different injectors down the line. My apologies if I am showing my ignorance of the subject but I come from an older era where I worked on Chevy 350s and Holley carbs type setups...this is the first fuel injected car I have ever tried to work on.

Also what advantage does the lex fuel kit from SpecialtyZ give you if its not needed as was earlier suggested...Injectors and a tune on e85 if read correctly.

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- Jeff
Drift Z: 2010 370z, TopGun Rotrex Supercharger, ID 1300cc Injectors, FI Long Tube Headers, GReddy RS-Race Single Exit, Setrab PS & Oil Cooler, BC Racing BR Coilovers, CJM S1.SE Fuel System, Walbro 525 pump with the CJM Billet Fuel Hat, OS Giken Superlock 1.5

Rusty

I would stay away from the AAM turbo kit. People on here have had issues with the kit. Where the turbo's are located at. They don't drain oil very well. Best bet would be going with either FI or BP turbo kits.

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JLarson

Just a couple notes, because there isn't a single 'correct' answer to your question here.

-On an NA car, you can run GT-R injectors for E85. That's your cheapest immediate option.
-On a boosted car, with 93 octane, you already need substantially larger injectors. I'm running 750cc @ ~500whp, using about 80% of capacity.
-If I were running E85, I'd need to increase size substantially, probably 1300s or 1700s.
-If that's where you're heading, you'll also need a bigger fuel pump or fuel pumps to provide appropriate flow.

You'll absolutely need a tune once you go to larger injectors. Trust me when I say that your car will not work with incorrect fuel scaling

Edit: +1 on Rusty's comment about the AAM twin turbo kit. Do not go for that one. If you want twins, go Fast Intentions. If you'd consider a large twin scroll turbo, go BP.

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2014 370z Touring Sport Magma Red MT // BP Single Turbo 6467 // 63mm TB's // Z1 Ported Upper Mani // RJM Pedal // Zspeed Stage 3 Clutch // 526 WHP, 451 WTQ
2006 350z (Sold) // 1990 300zx (Sold) // 1985 300zx 2+2 (Sold)

JeffP-Z

Thanks JLarson. That helped me understand better. Coming from a carburetor background the and jetting to specific requirements don't translate well to fuel injection. I also appreciate the feedback on the AAM kit Rusty. This helps in planning out which pumps, rails, injectors to get now so I can upgrade later to TT.

__________________
- Jeff
Drift Z: 2010 370z, TopGun Rotrex Supercharger, ID 1300cc Injectors, FI Long Tube Headers, GReddy RS-Race Single Exit, Setrab PS & Oil Cooler, BC Racing BR Coilovers, CJM S1.SE Fuel System, Walbro 525 pump with the CJM Billet Fuel Hat, OS Giken Superlock 1.5

Rusty

Get your fuel system parts from phunk at CJM. He's the go to guy. Two of the things you should get from him is the fuel pressure gauge and the top hat for the fuel pump.

I used to run around with a 572 CI Dart with a modded 1150 Holley on it. Going from carbs to fuel injection is a learning curve. You are now dealing with injector size, pulse width, dwell time, fuel pressure and a few other things. You are going from a wet flow to a dry flow on CFM too.

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浪人 - 殺し屋
"The Difficult Anytime, The Impossible By Appointment Only"
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