Ignition Timing And 97ron

[Guest shiftyshuffle]

just bought myself an h-reg standard 1.6.

 

in the service history there is mention of the timing being retarded/advanced (can't remember which) to aid better running on regular unleaded (95ron).

 

im currently running the car on 97ron, can this cause harm to the engine ie. bore wash because the fuel might not completley ignite on this timing setting?

 

also if i were to use 95ron on the standard (97ron) timing, would this go the other way and cause pinking?

 

how bad is pinking/pre-ignition for an engine?

 

Rob

[Ryan 99]

If the car is set up for 95ron then running on 97ron is a waste of time. It won't do any damage, but you're not getting the benefits of the higher octane fuel either.

 

Either run the car on 95ron and save a few pounds, or adjust the timing for 97ron and release a little more power.

[richsmells 2]

As said, you're just wasting money unless the car is timed up to use that fuel. I've read on here that 1.9s respond well to higher octane fuel once correctly advanced although have no experience of this.

Edited February 2, 2008 by richsmells

[mark rushton 0]

had mine tuned at skip browns . and they told me i should never put 95 in as they were designed for 97 , was making 106 bhp on 95 i use vpower and when they tuned it it made 116 bhp not bad for 130000 miles

[Pugnut 9 1 Cars]

i usually set the timing myself. stick in your v power and advance the timing 1mm at a time and take it for a test run . find a steep hill and go full throttle at low rpm and you'll easily hear the 'rattling' when its pinking. then just go back 1mm until it stops.

 

looking from the passenger side at the dizzy advance is clockwise

[VisaGTi16v 1]

Having never done this, is it just a case of popping the car off, making a mark to show current posistion, undoing a (or a couple) of bolts and turning it?

[hodgy 0]

Having never done this, is it just a case of popping the car off, making a mark to show current posistion, undoing a (or a couple) of bolts and turning it?

 

 

yes basically and keep going till it pinks then turn it back a notch and its done, does work as i advanced mine and it felt like a new car

[VisaGTi16v 1]

Great thanks, another thing on my todo list before the sprint season starts!

[hodgy 0]

but i advise you buy the H&H ignition solutions recurved dizzy cos you can advance the timing more and its a re furbed part bout £120 exchange

Edited February 4, 2008 by hodgy

[Rob_the_Sparky 10]

Re-curve alone is only about £40 from H&H, but they are designed for modded angines, not standard.