AVGAS

[avinesh]

Hey guys just wondering if avgas is ok to run on a 2jzgte engine (stock internals)....car has been tuned on 98pump gas on haltech ecu an is making around 540whp, just wondering if its ok to run avgas without retuning for a couple of nightspeed dragwars meet.....wont be running pure avgas but mixed with 98 pump fuel, about quarter tank 98 pump fuel with about 18liters avgas.......

[Flannelman]

if you have cats, dont, otherwise its fine

[avinesh]

if you have cats, dont, otherwise its fine

Dont have cats or o2 sensors.....just wondering if its ok to run avgas on a car tuned on 98 pump fuel......

[Toby]

If you're tuned for 98 it wont make a hell of a difference.


Do it anyway, smells nice.

[avinesh]

If you're tuned for 98 it wont make a hell of a difference.


Do it anyway, smells nice.

Yea just thought it would run safer on higher octane, dont really care much about power gains....an im getting it cheap.....

[Dell'Orto]

Wont make SFA difference unless you alter anything, will be perfectly fine. Also if you have platinum/iridium plugs swap them out too, lead screws them

[avinesh]

SFA did you mean it wont make any difference to engine running safer???

[Akane]

Yeah he means it makes "sweet F all" difference.

Try get the 100LL (low lead).....

[avinesh]

Yeah he means it makes "sweet F all" difference.

Try get the 100LL (low lead).....

Will the iridium plugs last one night speed meet?? I might pump the boost 1 or 2psi higher so thought it would offer a bit of safty....

[QikStarlie]

i used to mix it 50/50 with 98, in my old car. could tune it to run almost 10km higher trap speed, and run another 4psi boost. over straight 98.

so yeh should be fairly safe to throw some in, and run a bit more boost. long as there isnt anything silly going on with your tune, at higher manifold press.

if memory serves me right you need a bit more av than normal gas. because of the way its made. (pick up a 20l drum of pump gas then pick up a 20l of av) but in saying that, i didn't see a difference in the afr worth worrying about.

[avinesh]

i used to mix it 50/50 with 98, in my old car. could tune it to run almost 10km higher trap speed, and run another 4psi boost. over straight 98.

so yeh should be fairly safe to throw some in, and run a bit more boost. long as there isnt anything silly going on with your tune, at higher manifold press.

if memory serves me right you need a bit more av than normal gas. because of the way its made. (pick up a 20l drum of pump gas then pick up a 20l of av) but in saying that, i didn't see a difference in the afr worth worrying about.

I was gona run a bit more 98 then avgas like around 24liters 98 an 18 liters avgas, what do you recon???

[Py7h0n]

I would not bother with the AvGas. If you are worried about your tune get it looked at but you can make a bit more power than 540whp on 98.

[Lith]

Total waste of time if you aren't adjusting the tune to suit, in my opinion.

If you want to start playing with fun fuels, get a tune for an ethanol blend...

[avinesh]

I just thought it would offer a bit of safty as its higher octane thats all.......im gettin it for the same price as 98 octane from a mate soo just wondering if i should just put it in since it wont cost me anymore......

[Bazda]

Just put in some octane booster for some added safety. A $25 bottle will mix something like 100L +

I used straight av gas in my car, and it didn't like it. Went slower.
Basically I had to retune it if I wanted to run av gas. So I just kept with 98 and just run octane booster for piece of mind.

[avinesh]

o ok.....was the loss in power noticeable bazda???

[Bazda]

o ok.....was the loss in power noticeable bazda???

Noticeable enough for me not to use it unless I got a proper tune.

[Crampy]

AVGAS is way higher octane than 98. If you're tuned for 98, use 98.
If you want to use AV, then tune for it.

[matt dunn]

A car that does not need the extra octane to prevent detonation will usually make more power on 98
as 98 burns faster than avgas and there is a long technical explanation why.


I run Avgas as I get it easier and cheaper then 98.

[avinesh]

A car that does not need the extra octane to prevent detonation will usually make more power on 98
as 98 burns faster than avgas and there is a long technical explanation why.


I run Avgas as I get it easier and cheaper then 98.

What about a car that wants to run a psi or two higher??? And also 98 mixed with avgas lets say 60 percent 98 an 40 percent avgas, will it be 107 octane still or less like 101 or sumthing???