Still Pinking When Hot!!!

[rjben]

After my service the Griff (standard 500, stock ECU etc) is still pinking when hot although not as badly as before. Now it pinks on 50%+ throttle between 3-4k RPM when up to temperature. Spoke to the garage (very popular and reputable specialist) who advises me to retard the timing. So a couple of questions:

Q) As this is happening when hot, is it being disguised when the car is cold by the ECU over-fuelling?

Q) Will a cold air pipe and elbow from ACT help?

Q) Is there a chip with enhanced fuelling available? Not talking Mark Adams Tornado here – just a swap similar to the Cerbera smooth running chip from TVR Power (£20)

Q) What RPM can I expect mechanical advance to stop?


Thanks all,

Rob

[rev-erend]

Why not just retard the timing as they suggest.. it's probably a very small amount needed.. and more importantly - why did they not spot it on the road test

[rjben]

not sure as to why they did not spot it - how long are they supposed to road test them for - would have to be a good 10 - 15 mins to spot it AFIK.

I plan on retarding the timing but I want to check it first at max mechanical adavnce.

Cheers,

Rob

[nubbin.]

I tend to go pink when it's hot. Is that the same?

[rjben]

thanks for that! LOL

[pwd95]

What fuel are you using Rob?

[rjben]

I popped by your on Saturday.....but could not remember which house it was Wyn.....so made a lot of noise outside and figured you were not in!!

I use Super or Optimax etc - also added Octane Booster, helped a little but did not cure completly.

[Brink]

Check your cooling system as well.

[pwd95]

Bugger,..I was over at Castle Coombe for the day :baghhead: My house is the cream coloured one, one of the last at the Kingfisher end.

When are you over next

[rjben]

Brink said:

Check your cooling system as well.

Cooling system is very good so no probs there

Cheers

Rob

[Jasper Gilder]

My SX used to pink a bit but moving to 98 ron fuel stopped it. I'd try this before changing the timing as it's the easiest fix

[rjben]

pwd95 said:

Bugger,..I was over at Castle Coombe for the day :baghhead: My house is the cream coloured one, one of the last at the Kingfisher end.

When are you over next

Probably 4-6 weeeks - I'll drop you a line before hand

[rjben]

Jasper Gilder said:

My SX used to pink a bit but moving to 98 ron fuel stopped it. I'd try this before changing the timing as it's the easiest fix

Tried 97 / 98 with Octane booster, so no luck there.

Thanks,

Rob

Edited by rjben on Monday 11th June 12:41

[Paul V]

Mine was pinking after being set up at Power, put the timing light on and knocked it back a couple of degree's, was fine after that and not noticeably down on power, actually it was quicker as didn't have to worry about pinking

[rev-erend]

Set it to 28 degrees (full advance) at 4K revs or wait til it pinks and knock it back a few degrees..

The test drive should be just that .. not a joy ride.

[rjben]

rev-erend said:

Set it to 28 degrees (full advance) at 4K revs or wait til it pinks and knock it back a few degrees..

The test drive should be just that .. not a joy ride.

Thank You!