Spark Plugs

[SILICONEKID340HP]

Can some one just give me a number for a resistive spark plug for an aftermarket ECU.

Im sick of trawling the net..

[Simon says]

Just replace what you have "like for like" Daz the car is obviously running fine as is if it was not i am sure we would all know about it by now on a serious note ...... did you fix your little overheating matter? your sick of trawling the net because instead of searching for Megasquirt you keep Google-ing Megasquirters you naughty boy

Edited by Simon says on Tuesday 24th April 23:06

[ChimpanLucky]

Daz, just put a set of NGK BPR6EIX in there.

Massive improvement on my clockwork dizzy setup so they should be even better with your Megaskirt.

Shame you can't get them in red

[SILICONEKID340HP]

Simon says said:

Just replace what you have "like for like" Daz the car is obviously running fine as is if it was not i am sure we would all know about it by now on a serious note ...... did you fix your little overheating matter? your sick of trawling the net because instead of searching for Megasquirt you keep Google-ing Megasquirters you naughty boy

Edited by Simon says on Tuesday 24th April 23:06

No not had time, been in hospital over the weekend ,suspected DVT ,been injecting my self untill the scan ,after all this it was just ankle strain.

I only called 111, a new service complaining about an ankle pain ,told them i had just come back from my holiday ..two hours later i was in a hospital on a ward with geriatrics

Scan revealed i am OK so i have still got to sort the over heating out ..i do have 5k plug extenders but is that enough ?

Edited by SILICONEKID340HP on Wednesday 25th April 00:13

[Simon says]

SILICONEKID340HP said:

Simon says said:

Just replace what you have "like for like" Daz the car is obviously running fine as is if it was not i am sure we would all know about it by now on a serious note ...... did you fix your little overheating matter? your sick of trawling the net because instead of searching for Megasquirt you keep Google-ing Megasquirters you naughty boy

Edited by Simon says on Tuesday 24th April 23:06

No not had time, been in hospital over the weekend ,suspected DVT ,been injecting my self untill the scan ,after all this it was just ankle strain.

I only called 111, a new service complaining about an ankle pain ,told them i had just come back from my holiday ..two hours later i was in a hospital on a ward with geriatrics

Scan revealed i am OK so i have still got to sort the over heating out ..i do have 5k plug extenders but is that enough ?

Edited by SILICONEKID340HP on Wednesday 25th April 00:13

Glad you got the all clear Daz I would not recommend putting in hotter plugs in your spec motor as ChimpanLucky mentions (his motor lower spec & probably fine on em) although NGK have a very wide heat range I would def not play about with hotter heat ranges it could cost you a piston or worse look Darren if what you have fitted have lasted 3 years then fit the exact same plug its a no brainer

[SILICONEKID340HP]

Got a call this morning from NGK, he said i will be ok with the B7ECS only if i keep the 5k plug extenders , Resistive plugs are between 3.5 and 7k,but if i fit non resistive plug extenders which are the only one`s available now i would have to change the plugs .

I could use BPR7ES ,the only difference is the tips,V8D fitted this type when they rebuilt my engine so they must be ok.

This shows the difference

http://s156.photobucket.com/albums/t13/novasport13...

[Simon says]

SILICONEKID340HP said:

Got a call this morning from NGK, he said i will be ok with the B7ECS only if i keep the 5k plug extenders , Resistive plugs are between 3.5 and 7k,but if i fit non resistive plug extenders which are the only one`s available now i would have to change the plugs .

I could use BPR7ES ,the only difference is the tips,V8D fitted this type when they rebuilt my engine so they must be ok.

This shows the difference

http://s156.photobucket.com/albums/t13/novasport13...

That correct Daz the P stands for "protruding tip" I did use BPR7ES in the past too and they are fine if your going to be sticking with them Ebay as some real NGK bargains at times my last set of eight cost me just £11.00 to my door see here for yours http://www.ebay.co.uk/itm/NGK-Spark-Plugs-BPR7E-x4... the non S plugs have a flashier electrode (grooved) i.e BPR7E rather than BPR7ES they should come pre gapped at 35thou approx and this will work great just think of it as a better plug/mod

[Overhere]

Just put an R into the normal TVR number. This is what I recently bought off Fleebay, same as I'm running now:

NGK BPR6ES Spark Plugs fit Ford Anglia 105E Cortina Escort Mexico Equiv RN9YC

[ChimpanLucky]

Simon says said:

lad you got the all clear Daz I would not recommend putting in hotter plugs in your spec motor as ChimpanLucky mentions (his motor lower spec & probably fine on em) although NGK have a very wide heat range I would def not play about with hotter heat ranges it could cost you a piston or worse look Darren if what you have fitted have lasted 3 years then fit the exact same plug its a no brainer

Listen to Simon Daz, you have a very special engine build.

You need to balance the plug heat range with all sorts of factors compression ratio and induction temperature being the key ones.

You also need to factor in your driving style, the fuel you are running, even the ambient temperature can have an effect.

I looked into all this in some detail, for my 4.0HC the NGK BPR6EIX on the 14CUX & dizzy seemed to make sense.

A thorough inspection of my B7ECS definitely revealed early indications of fouling.

Remember the heat range number is a measure of how effectively the plug transfers heat to the surrounding cylinder head casting, there is an optimum temperature for a spark plug to run at in order for it to reach it's self cleaning state.

To me the B7ECS is probably the ideal plug for endurance racing, but in the real world of traffic jams & stop start motoring on a 14CUX that runs a bit rich at idle to 2,100rpm, a plug that's one number hotter should be more suitable.

TBH I was doubtful of the iridium marketing hype, I wasn't even sure the slightly extended exposed electrode would be right for the RV8, but plenty of LPG Rangie owners are using the BPR6EIX these days and love them.

So I thought "what the hell" I'll give then a try.

In my experience there are three immediately obvious characteristics of improved combustion.

1) Smoother idle

2) Improved throttle response

3) More torque

All three are often reported by RV8 owners when the move to a popper mapped spark (MegaJolt, MegaSquirt, Emerald ect) & I dont doubt this for a minute.

I have always felt my car was screaming out for better ignition, a slightly hunting idle and that fluffy 1500 - 2100rpm bracket all seemed like the characteristics of poor combustion.

Surprisingly the result of simply changing the B7ECS for BPR6EIX gave me noticeable improvements in all of the above three areas.

I'm not suggesting a set of BPR6EIX is in anyway a replacement for a proper mapped spark system, far from it, I still want to MegaJolt my car, it's a no-brainer.

But boy what a difference from just a change of plug type.

Never in my wildest dreams did I expect such an improvement from the BPR6EIX plugs, but I for one will now never return to the B7ECS again.

Perhaps they just suit my car & it's Mark Adams fuelling, but for those with a fairly standard TVR RV8 I strongly recommend you try a set of BPR6EIX.


From this shrouded electrode original:




To this:




I bet you'll feel the difference.

Edited by ChimpanLucky on Wednesday 25th April 17:14

[SILICONEKID340HP]

I know with my engine the BPR7ES does not hit the piston ,Im going to ask V8D if they will be ok.

The tip does sit lower,does this mean the spark is at a different place .

[Simon says]

SILICONEKID340HP said:

I know with my engine the BPR7ES does not hit the piston ,Im going to ask V8D if they will be ok.

The tip does sit lower,does this mean the spark is at a different place .

Daz you will never hit the pistons or valves in a million years with all the plugs suggested, if in doubt fit what V8D fitted they would no that they suit your spec engine from many years of experience, this is my last word on the subject Dave/ChimpanLucky if you have benefited from your plug swap then well done we seldom do many things on these cars that costs so little cant beat NGK in my opinion in 7 years at a Honda dealer (NGK were OE) and fitting exclusively NGK since I was 19 and 45 now I have only ever had two duff one's ever, that translates into thousands and thousands of plugs so as you can see that's some reliability record but I don't need to be sold to Japanese engineering as I was convinced decades ago, if I have to fit another plug through stock problems etc then its Denso another very reliable plug but more expensive

[Simon says]

SILICONEKID340HP said:

I know with my engine the BPR7ES does not hit the piston ,Im going to ask V8D if they will be ok.

The tip does sit lower,does this mean the spark is at a different place .

Daz you will never hit the pistons or valves in a million years with all the plugs suggested, if in doubt fit what V8D fitted they would know that they suit your spec engine from many years of experience, this is my last word on the subject Dave/ChimpanLucky if you have benefited from your plug swap then well done we seldom do many things on these cars that costs so little cant beat NGK in my opinion in 7 years at a Honda dealer (NGK were OE) and fitting exclusively NGK since I was 19 and 45 now I have only ever had two duff one's ever, that translates into thousands and thousands of plugs so as you can see that's some reliability record but I don't need to be sold to Japanese engineering as I was convinced decades ago, if I have to fit another plug through stock problems etc then its Denso another very reliable plug but more expensive

[SILICONEKID340HP]

Simon says said:

SILICONEKID340HP said:

I know with my engine the BPR7ES does not hit the piston ,Im going to ask V8D if they will be ok.

The tip does sit lower,does this mean the spark is at a different place .

Daz you will never hit the pistons or valves in a million years with all the plugs suggested, if in doubt fit what V8D fitted they would no that they suit your spec engine from many years of experience, this is my last word on the subject Dave/ChimpanLucky if you have benefited from your plug swap then well done we seldom do many things on these cars that costs so little cant beat NGK in my opinion in 7 years at a Honda dealer (NGK were OE) and fitting exclusively NGK since I was 19 and 45 now I have only ever had two duff one's ever, that translates into thousands and thousands of plugs so as you can see that's some reliability record but I don't need to be sold to Japanese engineering as I was convinced decades ago, if I have to fit another plug through stock problems etc then its Denso another very reliable plug but more expensive

They fitted BP7ES same as the BP7RES but not restricted. At the time i was on 14CUX

[Simon says]

SILICONEKID340HP said:

Simon says said:

SILICONEKID340HP said:

I know with my engine the BPR7ES does not hit the piston ,Im going to ask V8D if they will be ok.

The tip does sit lower,does this mean the spark is at a different place .

Daz you will never hit the pistons or valves in a million years with all the plugs suggested, if in doubt fit what V8D fitted they would no that they suit your spec engine from many years of experience, this is my last word on the subject Dave/ChimpanLucky if you have benefited from your plug swap then well done we seldom do many things on these cars that costs so little cant beat NGK in my opinion in 7 years at a Honda dealer (NGK were OE) and fitting exclusively NGK since I was 19 and 45 now I have only ever had two duff one's ever, that translates into thousands and thousands of plugs so as you can see that's some reliability record but I don't need to be sold to Japanese engineering as I was convinced decades ago, if I have to fit another plug through stock problems etc then its Denso another very reliable plug but more expensive

They fitted BP7ES same as the BP7RES but not restricted. At the time i was on 14CUX

Then just fit BPR7E trust me now that's me over and out

[SILICONEKID340HP]

Simon says said:

SILICONEKID340HP said:

Simon says said:

SILICONEKID340HP said:

I know with my engine the BPR7ES does not hit the piston ,Im going to ask V8D if they will be ok.

The tip does sit lower,does this mean the spark is at a different place .

Daz you will never hit the pistons or valves in a million years with all the plugs suggested, if in doubt fit what V8D fitted they would no that they suit your spec engine from many years of experience, this is my last word on the subject Dave/ChimpanLucky if you have benefited from your plug swap then well done we seldom do many things on these cars that costs so little cant beat NGK in my opinion in 7 years at a Honda dealer (NGK were OE) and fitting exclusively NGK since I was 19 and 45 now I have only ever had two duff one's ever, that translates into thousands and thousands of plugs so as you can see that's some reliability record but I don't need to be sold to Japanese engineering as I was convinced decades ago, if I have to fit another plug through stock problems etc then its Denso another very reliable plug but more expensive

They fitted BP7ES same as the BP7RES but not restricted. At the time i was on 14CUX

Then just fit BPR7E trust me now that's me over and out

Don`t be like that,we could go on for another 5 pages

[Simon says]

SILICONEKID340HP said:

Simon says said:

SILICONEKID340HP said:

Simon says said:

SILICONEKID340HP said:

I know with my engine the BPR7ES does not hit the piston ,Im going to ask V8D if they will be ok.

The tip does sit lower,does this mean the spark is at a different place .

Daz you will never hit the pistons or valves in a million years with all the plugs suggested, if in doubt fit what V8D fitted they would no that they suit your spec engine from many years of experience, this is my last word on the subject Dave/ChimpanLucky if you have benefited from your plug swap then well done we seldom do many things on these cars that costs so little cant beat NGK in my opinion in 7 years at a Honda dealer (NGK were OE) and fitting exclusively NGK since I was 19 and 45 now I have only ever had two duff one's ever, that translates into thousands and thousands of plugs so as you can see that's some reliability record but I don't need to be sold to Japanese engineering as I was convinced decades ago, if I have to fit another plug through stock problems etc then its Denso another very reliable plug but more expensive

They fitted BP7ES same as the BP7RES but not restricted. At the time i was on 14CUX

Then just fit BPR7E trust me now that's me over and out

Don`t be like that,we could go on for another 5 pages

You could .......

[blitzracing]

ChimpanLucky said:

Listen to Simon Daz, you have a very special engine build.

You need to balance the plug heat range with all sorts of factors compression ratio and induction temperature being the key ones.

You also need to factor in your driving style, the fuel you are running, even the ambient temperature can have an effect.

I looked into all this in some detail, for my 4.0HC the NGK BPR6EIX on the 14CUX & dizzy seemed to make sense.

A thorough inspection of my B7ECS definitely revealed early indications of fouling.

Remember the heat range number is a measure of how effectively the plug transfers heat to the surrounding cylinder head casting, there is an optimum temperature for a spark plug to run at in order for it to reach it's self cleaning state.

To me the B7ECS is probably the ideal plug for endurance racing, but in the real world of traffic jams & stop start motoring on a 14CUX that runs a bit rich at idle to 2,100rpm, a plug that's one number hotter should be more suitable.

TBH I was doubtful of the iridium marketing hype, I wasn't even sure the slightly extended exposed electrode would be right for the RV8, but plenty of LPG Rangie owners are using the BPR6EIX these days and love them.

So I thought "what the hell" I'll give then a try.

In my experience there are three immediately obvious characteristics of improved combustion.

1) Smoother idle

2) Improved throttle response

3) More torque

All three are often reported by RV8 owners when the move to a popper mapped spark (MegaJolt, MegaSquirt, Emerald ect) & I dont doubt this for a minute.

I have always felt my car was screaming out for better ignition, a slightly hunting idle and that fluffy 1500 - 2100rpm bracket all seemed like the characteristics of poor combustion.

Surprisingly the result of simply changing the B7ECS for BPR6EIX gave me noticeable improvements in all of the above three areas.

I'm not suggesting a set of BPR6EIX is in anyway a replacement for a proper mapped spark system, far from it, I still want to MegaJolt my car, it's a no-brainer.

But boy what a difference from just a change of plug type.

Never in my wildest dreams did I expect such an improvement from the BPR6EIX plugs, but I for one will now never return to the B7ECS again.

Perhaps they just suit my car & it's Mark Adams fuelling, but for those with a fairly standard TVR RV8 I strongly recommend you try a set of BPR6EIX.


From this shrouded electrode original:




To this:




I bet you'll feel the difference.

Edited by ChimpanLucky on Wednesday 25th April 17:14

But did it ever help with the cold start issue....

[ChimpanLucky]

blitzracing said:

But did it ever help with the cold start issue....

Yes Mark, three things helped sort that.

1) A session with Mark Adams

2) Removal of the main cat

3) My move to BPR6EIX

Each one progressively improved the condition, with the plugs finally eliminating all traces of the cold start issue.

Turn the key on a cold morning & drive away, no stalling at all, it's like an everyday car.

Previously if you touched the throttle without alowing the engine to idle & warm for a minute or so it would flood & die.

Only cranking with a wide open throttle would start it again.

Thats all a distant bad memory now, as is the hunting idle & it's dislike run 100% smoothly around the 1800rpm mark.

In fact it's been so improved over the last 12 months I might even let the wife drive it.

However you cound also argue with all this civility it's lost some of it's character.

Mind you the main cat removal gave it a voice that puts all that character back, plus some

[OleVix]

According to TVR Power this should give 10-20 ponies:

Tuning trick

Edited by OleVix on Wednesday 25th April 22:55

[blitzracing]

OleVix said:

According to TVR Power this should give 10-20 ponies:

Tuning trick

Edited by OleVix on Wednesday 25th April 22:55

I would think TVR power ought to take legal action for linking their reputation against such rubbish!!