<div class='quotetop'>QUOTE (orange 86 @ Feb 17 2008, 04:41 PM) </div>It will run stronger, cleaner and not detonate.
You can crank some more timing into it too for a smidge more go.
hi, i'd like to know the advantages and disadvantages of running 98 octane fuel ina 4ac. is anyone owning a 4ac and running 98 octane, if so what do u think about it
<div class='quotetop'>QUOTE (orange 86 @ Feb 17 2008, 04:41 PM) </div>It will run stronger, cleaner and not detonate.
You can crank some more timing into it too for a smidge more go.
You can have any brew you want... as long as it's a Datsun / Corolla / What is that?
will definately run smoother and may not ping, but the power increase will be barely noticeable, if u can notice it all, and before flamage begins, did the power u felt from ur pod filter start in the seat of ur pants, or in ur head?
unless u have plenty of money, i wouldn't bother, think about the extra 15c per litre, then think about how cheap a ge is
If the motor has relatively low compression, the 98 octane will make almost no difference.
But as people have said, try using it and advance the timing a bit. Will make performance slightly crisper, if you notice it.
you feel better when you valve bounce it
You are so right! Valve bouncing does have a strange therapeutic nature.
Feeling down? Lost your girlfriend? Try valve bouncing a 4A-C along a twisty highway.
My 4AC pings on hot days, well even mildly warm days, with 91. 98 stops that. No noticable power difference. My girlfriend now can identify pinging and has a basic understanding of it too.
Hen
whats valve bouncing?
from my understanding its a phenomenon when the valve springs cannot keep up with the revolutions from the camshaft and they 'bounce'. Not very good for an engine, but the 4ac loves it!
I missed a gear once and revved mine to 7.5K with no valve bounce... is that normal? Its a FWD 4ac :ph34r: ... don't ask
On topic: I've always run my car on 98 octane as i thought it needed it, i think i'll only run it on track days now and 91 for street driving.
I ran BP 98 RON in my 4k and even with the timing advanced to about 13 degrees there is no pinging and it definitely makes it smoother.