safe levels of boost

[Jonny4494]

And I'm guessing that'll cost an arm and a leg for a full tank?

[bobhatton]

And I'm guessing that'll cost an arm and a leg for a full tank?

What you do is buy a very high octane fuel, 116 or 120 and mix it with normal fuel to get the octaine you want

[jon]

And I'm guessing that'll cost an arm and a leg for a full tank?

What you do is buy a very high octane fuel, 116 or 120 and mix it with normal fuel to get the octaine you want

What about toluene? RON 121, MON 102

[Jonny4494]

So what sort of ratio for mixing the 2 fuels?

[bobhatton]

So what sort of ratio for mixing the 2 fuels?

You have to work that one out depending on the octane of what you are mixing and what octane you want.

[Draven]

See I struggle to believe that 99 isn't good enough. Simply because the Turbo was built and tuned for Japan Super Premium fuel which is 100 ron. I know 99 ron isn't quite enough but surely it is close enough not to cause knock.

I'd happily try to mix my own fuel to make 102 ron but dealing with highly combustible fuel scares me

[Draven]

So would you recommend using tesco's momentum 99 in them? Would it prolong the life of the engine?

I wouldn't use anything other than Super in a Turbo as it was Tuned for Japan and they use 100ron.

The higher the ron the better to avoid predet

[Draven]

And we should really be looking at MON ratings rather than RON..

[MR2 Rich]

See I struggle to believe that 99 isn't good enough. Simply because the Turbo was built and tuned for Japan Super Premium fuel which is 100 ron. I know 99 ron isn't quite enough but surely it is close enough not to cause knock.

Got to agree with this.

[bobhatton]

See I struggle to believe that 99 isn't good enough. Simply because the Turbo was built and tuned for Japan Super Premium fuel which is 100 ron. I know 99 ron isn't quite enough but surely it is close enough not to cause knock.

I'd happily try to mix my own fuel to make 102 ron but dealing with highly combustible fuel scares me

Just do not smoke when doing it.


We have fitted a number of damaged engines now with 8.0:1 pistons and they fly, so much faster than when running 8.5:1 comp on 99 fuel, no knock so the ECU controls as it should

[T.F.S.]

As much as I hate to agree with Bob on anything, he's dead right IMO.

I spanked my rev2 with 22psi, it got serious abuse but it was running 95 octane fuel....it was however running methanol injection which took octane to silly levels on boost though and that there is the difference.

[Race Idiot]

Just do not smoke when doing it.


We have fitted a number of damaged engines now with 8.0:1 pistons and they fly, so much faster than when running 8.5:1 comp on 99 fuel, no knock so the ECU controls as it should

Instead of just saying 'oh they fly' maybe you should give us some actual evidence with dyno charts of both examples.

[jimGTS]

Where are all these owners who own these cars??

[MR2 Rich]

Where are all these owners who own these cars??

Don't know which post that is referring to?

[gerbil1028]

Think jimgts comment was.aimed at the owners with the reduced compression pistons fitted

[gnzyza]

Is Shell Nitro+ not 100ron. Sure it is

[fingers99]

Is Shell Nitro+ not 100ron. Sure it is

99 RON.

[bobhatton]

Just do not smoke when doing it.


We have fitted a number of damaged engines now with 8.0:1 pistons and they fly, so much faster than when running 8.5:1 comp on 99 fuel, no knock so the ECU controls as it should

Instead of just saying 'oh they fly' maybe you should give us some actual evidence with dyno charts of both examples.

Why would we want to dyno a damaged engine or a stock rebuilt engine?

The power output will just be stock but the ECU is no longer running under the control of the knock senser so the car drives far better

[bobhatton]

Where are all these owners who own these cars??

Driving around in Devon and Cornwall.

[Odin_S]

I'm having a engine rebuild with pistons 8.0:1. I'll let you know if I fly