Thanks Kobe.

Mine usually runs around the 75 deg C mark (I have Mugen cooling mods) but it was quite warm here on Sunday (well warm for the UK) and I did notice that it went over 80 at one point - I shut it off shortly after so didn't notice any pinking although I am running high octane petrol (100+ ron) in at the moment.

Chris.

 

With the Mugen cooling parts the coolant temp is normally going to be in the 82C (180F) area and present no problems. If you are having pinging problems it is more likely engine lugging and/or IAT that is over 49C (120F).

Many people have used the Mugen ECU in this country and regularly experienced coolant temps over 88C without problem.. and the minor difference in CR is not that big a deal.

I think you are on the right track looking at an intake. Coolant temps up to 92C can be tolerated without problem if you can keep the IAT below 38C (100F) and avoid any lugging.

 

chris111 - it depends on what UK fuel you're running. Generally anything below 45C is fine. Stock airbox spikes past that quite easily though. With a Hondata gasket, intake manifold coolant bypass, and Mugen CAI, I see intake temps within 5 degrees of ambient worse case, normally one or two degrees off at most. If you're just seeing the spikes, try using pipe lagging on the pipe from the air intake to the air pump - the air in there gets heated by the radiator exhaust, and gives a slug of hot air giving a spike when you stop.
Your coolant temp sounds a bit low if anything. 80-82C is my normal warm range IIRC - but I'm not 100% sure without checking the figures.

-Brian.

 

Thanks Brian.

I'm running the Mugen CAI and have seen spikes well above 45 deg C - usually after the car has been stationary or when moving slowly after a hard run.

I'll look into lagging the air pump pipe as you suggest.


Chris.

 

Chris,

Are you using octane boosters to get to this RON rating?

 

[QUOTE]Originally posted by cdelena
With the Mugen cooling parts the coolant temp is normally going to be in the 82C (180F) area and present no problems. If you are having pinging problems it is more likely engine lugging and/or IAT that is over 49C (120F).

 

Gentoo,

Yes, I thought I'd see if it made any diference. Usually I run Optimax.

I've been running the ECU for over a year and haven't noticed anything bad, pinking etc.

It's only recently that I've been able to log temps etc. so have become a bit paranoid.

Chris.

 

Which one are you using? I will need to track some down for the summer. Getting caught in Scotland with no form of SUL would not be fun

 

If you're running Octane booster with Optimax, make suer it's not manganese based or you'll get manganese crystal deposits on the plugs which can cause problems in the longer run. In general if you muct use octane boosters, don't use them with Optimax unless you're sure of the booster - or don't use Optimax.
If your car is setup correctly, you can use pump fuel with the Mugen ECU without any problems - no need for octane booster.

-Brian.

 

UL states that 93 octane is fine, but there have been reported problems (no failures) with running 91 octane.