What do I need to change to make my sti run on avgas?

[Guest]

I know I need a different o2 sensor but is there any thing else ?

[ADIKT]

is this for a street car? What is your reason for running av gas?

[Guest]

Just my daily driver and just want to trial it really have heard good things about it.

[ADIKT]

Do you have easy access to av gas?

Its expensive

not available everwhere like normal pump gas

but yes people do see good results from using it.

one thing i would suggest is to get the car tuned for it

[gotasuby]

It's highly illegal to run on street. But will mean you can run more boost and timing on an aftermarket ecu thus getting more power. And it smells good but be prepared for a 10k fine if caught on street. And it costs more

[Joker]

oh and gut your cat or it will do it for you

[Guest]

Yeah in queenstown you can buy it what type of o2 sensor can I use ?

[Carbon]

Illegal and expensive. What are you wanting to achieve other than 'ive heard good things about it'

[ADIKT]

 Carbon said:

Illegal and expensive. What are you wanting to achieve other than 'ive heard good things about it'

fuckin run hi az boost n shit bro :

[pl0x]

not going to make F all of a difference unless you have a tune able ecu?

and most tune able ecu's don't need o2 sensors

[Pappu1]

 pl0x said:

not going to make F all of a difference unless you have a tune able ecu?

and most tune able ecu's don't need o2 sensors

+1

but why not use something thats more legal..

e85 man

now that stuff is pure gold for running some good numbers and fully legal as well

[Guest]

I just want to fill my tank up with it lol and see how it goes what o2 sensor do I need?

[kamineko]

 Ashton95 said:

I just want to fill my tank up with it lol and see how it goes what o2 sensor do I need?

then why are you asking for opinions, your not going to get what you want to hear?

afaik no one here runs avgas, and certainly not on a roadcar. i've read in my wideband O2 sensor manual that the lead content kills an O2 sensor so maybe you'll need to research what 'kind' you need. even then, its probably incompatible with the factory ecu

go fill up your tank, have fun

[rex-leggy]

no o2 sensor will last for very long with it . we only use a wide band o2 for tuning and then it comes strait out after (prolonged running fucks them) . theres no point running it .

you wont go any faster, only difference will be the smell and the hole in your pocket.

unless you tune for it then HELLO ;D

i just swapped back from avgas to 96 (obviously retuned for the 96 tho)

[lachlan]

02 sensor is only for cruise anyway .

avgas is cheap if you buy it the right price . its cheaper to make(for the octane rating) and there is no tax on it .

can get it for under $2 a litre if you buy a drum from the right airfield

really how are you goin to get caught ?

[Stoffa]

The smell is a dead giveaway.

[Guest]

Just turn off your car when you get pulled over lol

[rex-leggy]

 Ashton95 said:

Just turn off your car when you get pulled over lol

dosent work . ask anyone that was within a kilometer of my car

and then you see the pure white exhaust.

lachlan : its more then $2 a liter and the price is +gst so its expencive

[WRXONP]

The lead contet doesn't only kill O2 sensors - it will eat away at the valve seats - to the point compression drops considerably

[Guest]

eats away at the valve seals

[CUDDAS]

Love the smell of Avgas & best to be running a stainless exhaust cos it doesnt take long to eat mild steel pipes out if running long term too

[gotasuby]

I have an avgas fuel card and it cost me 2.20 plus gst. Also I have run it my car and a few others. Rally car I helped build uses it. Once you tune for it you can really get timing into it but does cost more.

[WRXONP]

 Ashton95 said:

eats away at the valve seals

Haven't herd of it killing seals - I know of engine with valve seat damage running av gas

That's the reason old cars that where suppose to run on leaded fuel have to run a additive to run un leaded

[Koom]

 WRXONP']

eats away at the valve seals

Haven't herd of it killing seals - I know of engine with valve seat damage running av gas

That's the reason old cars that where suppose to run on leaded fuel have to run a additive to run un leaded

The lead was supposedly the additive that helped keep old seats from wearing, not the additive that wore out the valve seats. They need the additive to protect the valve seats now that the lead is gone.

[quote name='about tetraethyllead said:

url=http://en.wikipedia.org/wiki/Tetraethyllead#As_valve_wear_preventive]As valve wear preventive[/url]

Tetraethyl lead works a buffer against microwelds forming between the hot exhaust valves and their seats.[2] Once the valves would reopen, the microwelds would pull apart and leave the valves with a rough surface that would abrade the seats, leading to valve recession. When lead began to be phased out of motor fuel, the automotive industry began specifying hardened valve seats and upgraded exhaust valve materials to prevent valve recession without lead

I know of an engine that had a melted piston that was running on avgas. And another that ran a big end bearing that was running on avgas.....

[WRXONP]

Yes exactly !!!

Hence y leaded fuel is bad in a car designed for un leaded

I dunno I think I worded it wrong before