Shell Optimax Exteme

barfy · Post by **barfy** » Thu Nov 17, 2005 12:15 pm

But thats it, its not really a whoshing noise its more of a flapping noise...

its hard to explain...

BuCkEt · Post by **BuCkEt** » Thu Nov 17, 2005 12:36 pm

Bird stuck in the intake?

But seriously.....maybe have one of the S.A boys to have a look if they're free or at the next meet?

Something might be loose inside your engine bay.

One thing I've noticed with my extractors is that they're rather raspy once I hop off the throttle....but never when I'm accelerating.

Post by **Bennoz** » Thu Nov 17, 2005 12:54 pm

Yeah - on decelleration its usually the flex section (just before the cat) that cavatates. Easy fixed with a bit of exhaust wrap.

barfy · Post by **barfy** » Thu Nov 17, 2005 12:58 pm

Ill just get the high flow cat and some sort of forced induction then get the emange and see what its like then ...

BuCkEt · Post by **BuCkEt** » Thu Nov 17, 2005 1:17 pm

and some sort of forced induction

frayli · Post by **frayli** » Thu Nov 17, 2005 5:21 pm

I had to fill up with normal ulp once when the premium was out of order was dead empty as well, i was careful not to hammer it but didnt have any pinging whatsoever wats the compression of FTO's 10:0? i dont think low ron fuel is as bad as you guys are sayng unless its tuned for 98. i know our audi is 11:0 and it does ping with ulp a half mix sorts it out though.

MADFTO · Post by **MADFTO** » Thu Nov 17, 2005 5:55 pm

Yeah the 6A12 has a comp ratio of 10:1.

Engines won't be happy in any sort of pinging situation. There's only so much an ECU can do to retard timing with such a high comp ratio.

Must remember, engines are designed with event occuring in order, if something goes whack, the engine will be able to put up with some abuse, but not for any long length of time.

Slither · Post by **Slither** » Thu Nov 17, 2005 6:52 pm

frayli wrote:I had to fill up with normal ulp once when the premium was out of order was dead empty as well, i was careful not to hammer it but didnt have any pinging whatsoever wats the compression of FTO's 10:0? i dont think low ron fuel is as bad as you guys are sayng unless its tuned for 98. i know our audi is 11:0 and it does ping with ulp a half mix sorts it out though.

Considering that GPX's are designed to run on 100ron MINIMUM running regular is not good for the engine, you may not get much pinging but that doesn't mean there's nothing wrong.

khunjeng · Post by **khunjeng** » Thu Nov 17, 2005 9:51 pm

does anyone use any addatives to increase 98 to 100??

frayli · Post by **frayli** » Fri Nov 18, 2005 9:20 am

yeah but designed to run and will run on are 2 different things, what damage can 95 ron fuel do if it isnt pinging? all we are talking about is a fuel being ignited, the ecu learns what petrol is being ignited and since we have only just come across 100 ron fuel and gpx's have been in the country at least since 98, im not flaming you at all just in case someone who has had their fto and run it on less than 100 ron fuel wont get all excited and get an engine rebuild.

EURO · Post by **EURO** » Fri Nov 18, 2005 11:55 am

Isnt one concern with 95 or less RON that we do not necessarily know what additives they are using to make up the other 5% ?

FTO338 · Post by **FTO338** » Fri Nov 18, 2005 12:03 pm

frayli wrote:yeah but designed to run and will run on are 2 different things, what damage can 95 ron fuel do if it isnt pinging? all we are talking about is a fuel being ignited, the ecu learns what petrol is being ignited and since we have only just come across 100 ron fuel and gpx's have been in the country at least since 98, im not flaming you at all just in case someone who has had their fto and run it on less than 100 ron fuel wont get all excited and get an engine rebuild.

Isn't this like saying cars are design to run on normal full size tyres but it will run on those yellow 13" spare

AERODYNAMIST · Post by **AERODYNAMIST** » Fri Nov 18, 2005 12:50 pm

dont really understand what is going on

but is that mean shell optimax is a NO?

BuCkEt · Post by **BuCkEt** » Fri Nov 18, 2005 1:04 pm

FTO338 wrote:
frayli wrote:yeah but designed to run and will run on are 2 different things, what damage can 95 ron fuel do if it isnt pinging? all we are talking about is a fuel being ignited, the ecu learns what petrol is being ignited and since we have only just come across 100 ron fuel and gpx's have been in the country at least since 98, im not flaming you at all just in case someone who has had their fto and run it on less than 100 ron fuel wont get all excited and get an engine rebuild.
Isn't this like saying cars are design to run on normal full size tyres but it will run on those yellow 13" spare

I like your thinking!

WildRide · Post by **WildRide** » Fri Nov 18, 2005 2:47 pm

Tell you what.
I'll fill up with a tank before the Daylsford cruise next weekend.

See how it hoes

WR

FTO338 · Post by **FTO338** » Fri Nov 18, 2005 3:10 pm

According to Mitsubishi Japan, the FTO need at least traveled 100km before the any new fuel will take effect.

So few lappy at Albert Park first W.R

WildRide · Post by **WildRide** » Fri Nov 18, 2005 3:32 pm

You mean I'm going to have to do laps of albert park

Oh noes!!!!

More likely I'll just take it easy for the first 100 klicks out.
It's a big cruise.

WR

paladin · Post by **paladin** » Fri Nov 18, 2005 6:13 pm

100 ron isnt always as it seems (see LPG cars!)

thing to be careful with ethinl is its a bit like LPG its got a high ron rating but doesnt 'produces less usable energy because it burns shorter then propaine as anyone whos driven a lpg car can tell you. this mean you actally lose power but gain in ethicencey and 'your engine, as long as it can handel the heat (like say a jap import..) will actually run smother and cleaner.

dont mistake 100 ron ethonol or lpg for 100 ron extream/aero fuel you can generally only ger on the drag track.

frayli · Post by **frayli** » Fri Nov 18, 2005 8:13 pm

although u can boost LPG pretty high before it pings because of the high octane i know a lot of people have gone straight LPG

paladin · Post by **paladin** » Fri Nov 18, 2005 8:48 pm

just tryed it out (30kms of driving after a 59l fill up)
it makes a smell like metho, very faint but its there. more importently i felt a improvment in low end toque (most notacible when climing the driveway at low rpm to keep the noise down...) and she is a tiny bit mroe willing to get to the top end but i would not say it was stronger in the top end, more responsive but not as much push.
but this may be because its more fluent as the mivec switch is less noticable (i am guessing this is because hte ron means it is burning less lean)

3c/l more then opti making it 13c more then std