Highest Octane For Stock ECU??

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

kannibul

OK, sorry!

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.