Hi
I had recently Apexi fc fitted by ant on here. I still have a cat but a HKS back box.
Boost has been turned up a little too The car is a daily driver.
Ant recommended that I change my spark plugs for something better then standard RX7 plugs. Next month I am going to service the car.
Can some one kindly explain to me the difference between 9s 10s and 11s and which ones are suitable for my car or rather which ones will give me increased performance with out starting problems..
Thanks in advance
Regards,
Michaelb
If you\'re having starting problems, use 7\'s and 9\'s I think. :)
Hi
Thanks for that.
I am not having starting problems but I heard that if you chnge your sparkplugs to a different type you may end up with them...
Regards,
Michaelb
Quote from: JoehIf you\'re having starting problems, use 7\'s and 9\'s I think. :)
The numbers indicate the heat rating 7\'s being the warmest and 11\'s the coldest, the more boost you run the colder the plug [in simple terms] if you have upped the boost above .9 bar I would have thought 9\'s all round if you have gone higher 9\'s & 10\'s I would add I am no tuner and I am giving this advice as a fellow driver, if in doubt consult you prefured tuner.
Quote from: John YorkeThe numbers indicate the heat rating 7\'s being the warmest and 11\'s the coldest, the more boost you run the colder the plug [in simple terms] if you have upped the boost above .9 bar I would have thought 9\'s all round if you have gone higher 9\'s & 10\'s I would add I am no tuner and I am giving this advice as a fellow driver, if in doubt consult you prefured tuner.
Thanks for the input
The boost on the commander show at the highest 0.92 mmhg
As far as I remember ant put up the primary and secondary by 0.5 each…
I must say that the car got much faster…
Shall I use 10 for better performance? Will the car start during winter?
Can I have a mixture of 2 9s and 2 10s ?
Regards,
Michaelb
You should be ok for 9\'s all round. If you run any higher boost you will want to use racing 11\'s. I had to swap over to 11\'s with 0.98bar. I could use 9\'s if i didn\'t rev it to the redline ! The car starts to misfire at top end otherwise.
Shaun
I use an 11 in the lead plug and a 10 in the trailing plug.
It isn\'t wise to be using that cooler a plug if you are going to be using the car around town as the cooler the plug the more likely it is to foul up.
If you want to use a different heat rating then go for a 9/10 but you might as well go for 9\'s all round
Having spoken to the Rx7 store they recommend a bike plug....and at only £5 per plug makes it cheaper.
Ive put an order with Mark for some Iridium plugs. But usually use Sparkplugs.co.uk
Hi
Thanks for that. I
went on the site and is this the ones you mean NGK--BUR9EQP ?
Regards,
Michaelb
Quote from: AtomicRexI use an 11 in the lead plug and a 10 in the trailing plug.
It isn\'t wise to be using that cooler a plug if you are going to be using the car around town as the cooler the plug the more likely it is to foul up.
If you want to use a different heat rating then go for a 9/10 but you might as well go for 9\'s all round
Having spoken to the Rx7 store they recommend a bike plug....and at only £5 per plug makes it cheaper.
Ive put an order with Mark for some Iridium plugs. But usually use Sparkplugs.co.uk
Which site were you looking at?
I spoke to the guys at sparkplugs.co.uk and to be honest they werent able to offer me anything I really wanted. NGK dont sell the race plugs to the UK, they even checked out the european arm. The alternatives were very expensive.
Either chat to Mark (blitzboy) and order some through him, or see if Gary at Rotaryarts can get you some.
If you want the racing plugs pip at wgt does stock them but they arn\'t cheap.
So what bike plug would you be able to use (very interesting) ??????
Shaun
The plug details are on a mail at work, but I will post it on here tomorrow
And as for cheap....er no! Although for my old K-Series I was paying almost £50 per plug!
Having said that dont go to Merc for a spark plug change....£500 :-o
Hi Michael,
As many have said on this thread, you only need 9\'s in both leading and trailing spark plug holes in your car and would advise not to even think about anything different.
btw, We sell these at £38 a set delivered which is £2.00 cheaper than Sparkplugs.co.uk :)
I don\'t think 7\'s are available any more but you would only need to put these in a nearly dead low compression engine in an effort to stop it flooding.
Not that you need them but 10.5 plugs are readily available in the UK but cost £32+vat per plug :3Confused
Hope this helps
Quote from: AtomicRexI use an 11 in the lead plug and a 10 in the trailing plug.
It isn\'t wise to be using that cooler a plug if you are going to be using the car around town as the cooler the plug the more likely it is to foul up.
If you want to use a different heat rating then go for a 9/10 but you might as well go for 9\'s all round
Having spoken to the Rx7 store they recommend a bike plug....and at only £5 per plug makes it cheaper.
Ive put an order with Mark for some Iridium plugs. But usually use Sparkplugs.co.uk
Hi John,
I think you mean that they are 10\'s in the leading and 11\'s in the trailing.
That is how they should be,and most important to be that way around too.
Regards
Carl
Oops sorry Carl....yes that is the way I meant :eek
And I thought I was actually sounding as though I knew what I was on about then!
Hi Carl
How are you doing!!! I finally got the Apexi fc and commander ( remember we had a chat about it at JAE, had it fitted it by ant on here, had the boost lifted a little and you were right â€" much better performance then using the stock ecu…
I guess I will be getting the spark plugs from you next month for the service.
I wonder if I should try and change them my self as I have been told that they are difficult to get to
Regards,
Michaelb
Quote from: ShyAuto.comHi Michael,
As many have said on this thread, you only need 9\'s in both leading and trailing spark plug holes in your car and would advise not to even think about anything different.
btw, We sell these at £38 a set delivered which is £2.00 cheaper than Sparkplugs.co.uk :)
I don\'t think 7\'s are available any more but you would only need to put these in a nearly dead low compression engine in an effort to stop it flooding.
Not that you need them but 10.5 plugs are readily available in the UK but cost £32+vat per plug :3Confused
Hope this helps
I was on Sparkplugs.co.uk...
Regards,
Michaelb
Quote from: AtomicRexWhich site were you looking at?
I spoke to the guys at sparkplugs.co.uk and to be honest they werent able to offer me anything I really wanted. NGK dont sell the race plugs to the UK, they even checked out the european arm. The alternatives were very expensive.
Either chat to Mark (blitzboy) and order some through him, or see if Gary at Rotaryarts can get you some.
Incidentally the 7s and 9s are about £4 each on summitracing.com :) I ordered some other stuff anyways so got myself a couple of sets!
The bike plugs are NGK B10EGV
There are always cheaper plugs, you just have to be convinced on how long they last, how soon they will clog up, and whether a better burn pattern will benifit you more.
Gary at rotaryart.com is getting me some 10.5 racing jobbies as we speak. If you speak to him he should be able to get you whatever you need as well.
Dave
Quote from: AtomicRexThe bike plugs are NGK B10EGV
There are always cheaper plugs, you just have to be convinced on how long they last, how soon they will clog up, and whether a better burn pattern will benifit you more.
The Summit ones are the proper NGK ones so for my car should be fine :)
I have been running EGV9s/10s in my Cosmo for the last 6 months. Not had any problems, just changed to a fresh set for the winter.
There is a good thread HERE (http://ausrotary.dntinternet.com/forums/viewtopic.php?t=30048&highlight=spark+plugs) on Ausrotary on spark plugs.
HI CLive
Which of thoes 2 types of your site would you recomend
NGK Spark Plugs BUR 9EQ 8.44. each
or
BUR 9EQP 9.15 each
What does eq and eqp stands for ?
Regards,
Michaelb
Quote from: ShyAuto.comHi Michael,
As many have said on this thread, you only need 9\'s in both leading and trailing spark plug holes in your car and would advise not to even think about anything different.
btw, We sell these at £38 a set delivered which is £2.00 cheaper than Sparkplugs.co.uk :)
I don\'t think 7\'s are available any more but you would only need to put these in a nearly dead low compression engine in an effort to stop it flooding.
Not that you need them but 10.5 plugs are readily available in the UK but cost £32+vat per plug :3Confused
Hope this helps
Quote from: michaelbHI CLive
Which of thoes 2 types of your site would you recomend
NGK Spark Plugs BUR 9EQ 8.44. each
or
BUR 9EQP 9.15 each
What does eq and eqp stands for ?
Regards,
Michaelb
The "P" is for Platinum plugs,which are the ones you need.
Regards
Carl
Quote from: michaelbHi
better then standard RX7 plugs.
There is no such thing as better than standard. Using a different plug is not a performance modification. The plug you need is the one that suits the way the car is mostly driven.
I see "racing" plugs on here. Well, if you used a "racing" plug on the road, it will cause you a problem very quickly.
The ones I am getting are 10.5\'s. The car isn\'t exactly standard at 465atw and over a bar of boost, apart from country blasts only really sees the track, and is set up on 10s and 11s, so 10.5s should be fine thankyou :). The current ones are fouled as it happens, but thats (I hope) more because I\'ve had to keep it stored for a couple of months whilst moving house, and just starting it and running for a bit reguarly,instead of giving it a blast as well as flooding it a couple of times. Then again I\'m no expert so maybe some warmer ones would help, but I don\'t think so.
Hi Matiny
Thanks for the input
Most of the “bits” under the bonnet can be changed from standard parts to after market better performance parts, ECU, rad, intercooler, fuel pump, injectors, belts, ignition leads. hoses ect…
Surly there are “better performance” spark plugs available to Mazda RX7 or 13b engine? Surly some plugs will give a better spark at start up when cold or higher speeds (motorway..) and will misfire less?
Regards,
Michaelb
Quote from: MartinyThere is no such thing as better than standard. Using a different plug is not a performance modification. The plug you need is the one that suits the way the car is mostly driven.
I see "racing" plugs on here. Well, if you used a "racing" plug on the road, it will cause you a problem very quickly.
I agree and then disagree with you on that quote. Yes the heat rating does affect the suitability of the plugs but the type of plug ie copper, platinum, iridium isnt such the case. The burn efficiency of the iridium plug is going to be greater than that of the copper. Should in theory produce more power and also better economy....which when im only getting 5mpg is possibly a good thing!!! ;)
Quote from: michaelbsomething better then standard RX7 plugs.
Can some one kindly explain to me the difference between 9s 10s and 11s and which ones are suitable for my car or rather which ones will give me increased performance with out starting problems..
Thanks in advance
Regards,
Michaelb
Ok, lets go again then....
Changing the heat rating is NOT a performance upgrade !
I agree that different materials could be, though.