More BAD Optimax Facts

[Buttoned_Down_Psycho]

do R33's have knock sensors? - if so then why do the standard cars among you ping? even slightly boosted cars should be kept in check with the knock sensor retarding the timiing right?

[Jay95R33]

The factory ECU can only retard the ignition by a certain amount.

When it starts pinging (RB25det's have 2 knock sensors), the ECU will retard the timing. But if the pinging is really bad, the ECU won't be able to retard it enough to stop it.

J

[HUSTLR]

No probs with Optimax with me :burnout: :burnout: :burnout:

[Zer0]

I usually run either BP Ultimate or Optimax in my both of my bikes as do most of my friends and none of us have ever really had any problems with either nor noticed any difference between them.

I ran my R32 on Optimax all the time as there was a Shell servo just round the corner from my house in Sydney Always ran really well.

Since I have had my R33 I have been running it on BP Ultimate always and have found it to run a bit rough and kind of stutter a bit around 8-9 PSI.

Filled it up with Optimax on Saturday and now it is silky smooth and runs perfectly at 11 PSI.

Whacky but there you go.

[Mr Miagi]

All fuels loose their potency with time.(and surpriseingly short time)

Having raced cars and boats, it was normal procedure to purchase the fuel either the day before or morning of the event and put it in the car/boat just before the race.

I know of more than a dozen people that have had problems with Optimax. Shell did apparently change the formula in the last 12 months which has caused problems in certain engines but in my opinion the problem mainly arises from dodgy service station operators mixing Optimax with ULP/PULP.

[Cubes]

I'm currently running 14psi of boost with a fmic and BP Ultimate.

Also 25degrees of timing and there was no pinging on the dyno.

[cynider]

This could be why my car is running like Shnite. Put a full tank in about a month ago.

GSI: Thats Parra rd is where I fill up too! first time I had probs my car was stalling while croozing (fixed with BP ultimate) now it's almost stalling when I hit a bump. Will I ever learn?

.