17 replies to this topic

[mk7cooper]

i have an spi cooper (1998) which plugs does everyone think are better and has anyone played around with gap sizes? i am currently running ngk bpr5es with a .080 gap - are champion better? i know iridium are better but are they ok in an spi mini? - i look forward to everyones thoughts - mark

[TimC]

i have an spi cooper (1998) which plugs does everyone think are better and has anyone played around with gap sizes? i am currently running ngk bpr5es with a .080 gap - are champion better? i know iridium are better but are they ok in an spi mini? - i look forward to everyones thoughts - mark

On my 96' SPI I've been running the BPR6EIX Iridium-X NGK's. Gapped at .80mm gapped. works perfectly.

[mk7cooper]

i have an spi cooper (1998) which plugs does everyone think are better and has anyone played around with gap sizes? i am currently running ngk bpr5es with a .080 gap - are champion better? i know iridium are better but are they ok in an spi mini? - i look forward to everyones thoughts - mark

On my 96' SPI I've been running the BPR6EIX Iridium-X NGK's. Gapped at .80mm gapped. works perfectly.

do you think it would be ok on a distributorless model? i have read that they dont like extreme plug changes, is that true or just a load of #$%$#@#$$% - cheers for the reply

[Sprocket]

Dont waste your money on Champion. Rover only ever specified the NGK BPR6E plug, the plug you use is a hotter plug being the BPR5ES

the letters after the BPR6E denote the style of plug S, IX and so on, the imoprtant bit to get right is the BPR6E bit

The Iridiums are fine, they just last longer.

Plug gaps are stated as 0.8 to 0.9mm

[mk7cooper]

Dont waste your money on Champion. Rover only ever specified the NGK BPR6E plug, the plug you use is a hotter plug being the BPR5ES

the letters after the BPR6E denote the style of plug S, IX and so on, the imoprtant bit to get right is the BPR6E bit

The Iridiums are fine, they just last longer.

Plug gaps are stated as 0.8 to 0.9mm

thanks for that - i will give the iridiums a go then - cheers - mark

[sirweste]

Recently seen a benifit from fitting NKG BP6ES instead of the recommended resistored version BPR6ES

[taffy1967]

Recently seen a benifit from fitting NKG BP6ES instead of the recommended resistored version BPR6ES

But do you now get radio interference as a result?

Because the resistor was simply there to prevent this from happening.

[Sprocket]

Recently seen a benifit from fitting NKG BP6ES instead of the recommended resistored version BPR6ES

But do you now get radio interference as a result?

Because the resistor was simply there to prevent this from happening.

Very true, but what it also does is reduce the resistance of the HT circuit causing the coils to overheat

[taffy1967]

Recently seen a benifit from fitting NKG BP6ES instead of the recommended resistored version BPR6ES

But do you now get radio interference as a result?

Because the resistor was simply there to prevent this from happening.

Very true, but what it also does is reduce the resistance of the HT circuit causing the coils to overheat

Well I've not had any coil problems myself?

[mk7cooper]

Recently seen a benifit from fitting NKG BP6ES instead of the recommended resistored version BPR6ES

But do you now get radio interference as a result?

Because the resistor was simply there to prevent this from happening.

Very true, but what it also does is reduce the resistance of the HT circuit causing the coils to overheat

hi sprocket - tell me would having the bpr5's possibly cause the car to hunt? - i did have a lot of vacum problems and have finally got the car running nicely, but it hunts at idle, could this be the computer still learning (only done about 100 miles since) or could it be the hotter plugs - cheers mark

[Sprocket]

Recently seen a benifit from fitting NKG BP6ES instead of the recommended resistored version BPR6ES

But do you now get radio interference as a result?

Because the resistor was simply there to prevent this from happening.

Very true, but what it also does is reduce the resistance of the HT circuit causing the coils to overheat

Well I've not had any coil problems myself?

Does that make it alright?

[Sprocket]

Recently seen a benifit from fitting NKG BP6ES instead of the recommended resistored version BPR6ES

But do you now get radio interference as a result?

Because the resistor was simply there to prevent this from happening.

Very true, but what it also does is reduce the resistance of the HT circuit causing the coils to overheat

hi sprocket - tell me would having the bpr5's possibly cause the car to hunt? - i did have a lot of vacum problems and have finally got the car running nicely, but it hunts at idle, could this be the computer still learning (only done about 100 miles since) or could it be the hotter plugs - cheers mark

I dont know, and you wont know untill you try a set of BPR6E plugs

[taffy1967]

Recently seen a benifit from fitting NKG BP6ES instead of the recommended resistored version BPR6ES

But do you now get radio interference as a result?

Because the resistor was simply there to prevent this from happening.

Very true, but what it also does is reduce the resistance of the HT circuit causing the coils to overheat

Well I've not had any coil problems myself?

Does that make it alright?

Well my Mini (which I've owned for 15 years) has gone well passed 98,000 miles, starts up first time and runs sweet as a nut. So I don't see those Spark Plugs as being wrong or causing any issues at this stage?

[sirweste]

putting the non resistored version on mine brought down the emmisions - because they give a bigger spark. But i have done very little milge on them at the moment so i could commentr on thier effect on the coil pack

[Cian 'the pain' MPI]

Im running splitfire split pin spark plugs gave a definate difference