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Just Did Plugs @ .5mm And Kung Pow!im Back!

cosworth1971
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cosworth1971 Community Regular

cosworth1971

Posted
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after installing a FMIC & big exhaust my car was blah! blah! blah! @over 3/4 throttle underload.did all the coil pak epoxy and ran down to .66 and it was still hesatating :angry:

So advancing timing made it seem better it was masking the plugs because @ 25-30 btdc timing it wouldnt lag and the less the timing the worse the lag

But just then i tried .5 copper plugs and went back to 15 deg timing like it should be and POW! no more blah!blah! or power stumble and it even spiked to 13psi without lag :woot:

So guys with std coil paks and problem even try down .5 IMO

Im so happy i have my car back after 15ooo kms of trouble :laughing-smiley-014:

My theory is that weak coil paks and preasure dont mix(blows out spark) so if like me and cant afford splitfires yet try .5 for a tempish fix :)

also i was a bit scared to do up plugs fairly tight(without too much!) but found i was doing them a bit lose :)

<saves for new coils now with confidence thats it :)

R31Nismoid Grand Master

R31Nismoid

Posted
Posted

The car will be more efficient with a better gap on the plugs.

So you might aswell start budgeting for new coil packs.

The gains outweight the cons.

It will get to a point where even .5mm wont work, so definately a temp fix, thats all the epoxy/tape/small gap ever has been

cosworth1971 Community Regular

cosworth1971

Posted
  • Author
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The car will be more efficient with a better gap on the plugs.

So you might aswell start budgeting for new coil packs.

The gains outweight the cons.

It will get to a point where even .5mm wont work, so definately a temp fix, thats all the epoxy/tape/small gap ever has been

yes i will save mate.

either it was the gap or the copper plugs?i went .5 straight up <from .66 irids but it alowed me to come back to 15 BTDC

and yes a bigger gap will burn more and economy but do u think power up also?and im talking over 1-2 kw

clkngezz Enthusiast

clkngezz

Posted
Posted

wow, i would think that .5mm is going beyond border line, is it safe to do for a limited time?? i need new splitfires to but need cash to get them, im looking for a temp fix for about a month, i tried taping coils but it didnt do a thing! my problem was similar to yours, car hesitates after 4500 rpm now to about 6 then powerful again. IM wanting to try this but is it safe? can it cause more problems

cosworth1971 Community Regular

cosworth1971

Posted
  • Author
Posted
wow, i would think that .5mm is going beyond border line, is it safe to do for a limited time?? i need new splitfires to but need cash to get them, im looking for a temp fix for about a month, i tried taping coils but it didnt do a thing! my problem was similar to yours, car hesitates after 4500 rpm now to about 6 then powerful again. IM wanting to try this but is it safe? can it cause more problems

problems like what?its only a spark.no like your changing its timing or votage........it may be smaller but under cold extreme presure the small gap has more chance to fire every time and not get blown out.yes a nice big spark will burn better but we all arent rich.im saving now

but my problem was different to yours it never went powerfull again after 6 it just couldnt take WOT under load full stop.

yes it may be crude but im broke atm

maybe going from the iriduims to copper plugs helped also?

R31Nismoid Grand Master

R31Nismoid

Posted
Posted
well, my tuner didnt seem to think so, and hes got a very good reputation, especially around here and with RB's

Well im glad i dont take my car there :D

I didnt need a gap smaller than .8mm running 24psi/360rwkw on stock coils & ignition as mine were in good nick.

So if you need to run less and think its acceptable, thats your decision. Im just telling you i feel there is an issue wether you want to fix/investigate it or not is again, your decision.

moonus Experienced

moonus

Posted
Posted

the problem is the coils breaking down but id rather run the smaller gap even if it is a short term solution then have the misfire. Evenutally i will replace with splitfires but given the budget im on, i dont really have any other option..

cosworth1971 Community Regular

cosworth1971

Posted
  • Author
Posted
Well im glad i dont take my car there :)

I didnt need a gap smaller than .8mm running 24psi/360rwkw on stock coils & ignition as mine were in good nick.

So if you need to run less and think its acceptable, thats your decision. Im just telling you i feel there is an issue wether you want to fix/investigate it or not is again, your decision.

OMG 24psi @.8 on stock coils :blink:

0.8mm or even closer to 1.1mm would be ideal

Man! your hot! :rofl:

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