Highest Octane For Stock ECU??

kannibul

That's the whole problem right there.

Higher octane gas isn't better for your car...

Shunya

well is it a bad thing using 94 octane? why should fuel lower than 94?

my mechanic told me that my engine requires me to use 94octane.
after internal work had been done.

kannibul

What internal work did you have done?

Shunya

I'm gunna try to list things on the back of my head now..
1.8L>2.0L Bore, Camshafts, Cam Gears, Pistons, Rods, Valve Springs, Fuel Pump, Fuel Rail, Injectors, Port Matched, Port & Polish, Ecu.... etc...
too much to list on my track car.

Izzoh

That would raise your compression def. over what 91 would safely let you handle. How high where you reving and what compression where your pistons ?

kannibul

Sorry, I thought you were driving a Z.

What do you do if you can't get 94 octane?

Why go to 94 octane unless you're running 12:1 or greater compression?

Izzoh

I think she drives a type R or has a type R swap those are 11.5:1 from the factory so giving that list of internal work I'm assuming it's been rasied to the 12:1 or higher. Most that I know go 12.5:1 on their B-series if they're sticking to NA.

Shunya

hahaha well I just think it's better to give my baby better food

it's at 12.1
you're on the right track it's 12.1
It's a Type R and it eats most of the k-swaps in town

Izzoh

It's not a bad thing. You said you did internal work which probably raised your compression ratio that rasied ratio usually will cause a car to Ping (detonate) running lower octane (87,89,91) rated gas. Running 94 will allow you to take advantage of the mods that you did to your engine by tuning.

Higher Octane dosen't increase HP/TQ it just helps to keep Pistons from coming out the side of the block or through the oilpan by helping reduce Knocking and Pinging. Tuning is where you get your HP from.

bigaudiofanat

I agree, if your car was made for regular than you burn regular. I mean yes in my civic I have ran a few tanks or premium with a fuel injector cleaner and a few times on race night but there was no real reason for it. If it takes a certain kind of gas that is what you should use. End of story.

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37Z

104 Sunoco race fuel on a re-tune!!

Blown32

Apparently this is one of those subjects that you can beat to death.As I said in my last post there are those that insist race gas will make more power in the Z because they just don't know any better.
The 370Z in stock form is NOT going to make more hp with race gas instead of the recomended fuel by the manufaster.Plain and simple!
Some know the real deal and others are lost.It is a shame that these gimmicks catch some and they waste there money!
So anyone advertising any different are looking to draw attention,don't know what they are talking about or looking to make a buck on the public that just isn't familiar with the performance world.
As for the additional 14 hp on just race gas with a stock 370z is pure bull at its best!
Guys in the race world spend thousands of dollars to gain every little bit of hp to have an edge over there competiter but a stock motor with premium fuel versus race gas is a waste of money!No advantage power wise unless its been modified with the compression raised to the point it will detonate on pump fuel!
As to the oxgeanated fuel that is a whole different type of fuel.The first post if I recall was about higher octane fuel.

JoeD

This is what I've been saying all along.

ZzzZz

Yes. Let's talk about at the pump of the majority of gas stations. It's not about educating people about race gas, 120 Octane gas, or the "more octane is always better" mentatility. It's about finding out what the 370z runs best on and possibly saving money to boot.

Let's talk about what almost all members here can get:
91 vs 92 vs 93 vs 94 AKI

External factors aside (engine condition, temperature,), will a stock 370z be able to gain anything performance-wise by pumping higher than 91 octane gas?

semtex

I'll PM Ryan at Injected Performance (one of the forum's sponsors) and ask him to chime in on this, seeing how he's the one who did the test and made the video. I'll let him know that you're calling him out as a liar and a fraud.

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