92,239 8,066,165click here to join ScoobyNet, FREE!
 
 
  Subaru forum > Technical / Subaru Modifications > General Technical

NGK PFR 6's or 7's

User Name
Password
Join our forum Search Mark Forums Read
General Technical General Technical Discussion

Welcome to ScoobyNet.com!
Subaru forum

Welcome to the ScoobyNet.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact contact us.

 
 
The world famous ScoobySport exhaust system can be recognised by its distinctive flat four burble, and enjoyed through its unparalleled flow and performance properties.

  • True negative pressure at turbo exit
  • Unparalleled flow and performance
  • Improved driveability, reduced turbo lag
  • Lifetime warranty!
Reply
 
Old 06 May 2008, 18:23
Skooby53
Scooby Regular
Join Date: Aug 2007
Posts: 415
This is my Scooby. To set up your own Scooby, go to your user cp, and click 'Edit Settings'.
Click here to see my Plus Profile, and Guestbook
Default NGK PFR 6's or 7's
Hi guys, I have been experiencing hesitation from cold, only for a few min's until warm then all is fine. I want to replace the plugs, I currently have 6's fitted, I had a remap in Feb and I'm now running 281bhp. The question is do I fit another set of 6's or 7's?

Could the fact that the MOT station left my motor running for 45 min's on tick over have damaged the electrodes as it only started the day after!

Thanks to those of you who responded to my previous thread, just want to get the right ones.

Martin.

Skooby53 is very very happy with Bob R's work.
Skooby53 is offline Add Infraction for Skooby53  
this post is currently rated :   OK ?  
Reply With Quote
Old 06 May 2008, 19:00
johnnyroper
Supporting Member
Join Date: Dec 2006
Location: at the petrol station again!!!
Posts: 1,187
This is my Scooby. To set up your own Scooby, go to your user cp, and click 'Edit Settings'.
View My Scooby
Default
Quote:
Originally Posted by Skooby53 View Post
Hi guys, I have been experiencing hesitation from cold, only for a few min's until warm then all is fine. I want to replace the plugs, I currently have 6's fitted, I had a remap in Feb and I'm now running 281bhp. The question is do I fit another set of 6's or 7's?

Could the fact that the MOT station left my motor running for 45 min's on tick over have damaged the electrodes as it only started the day after!

Thanks to those of you who responded to my previous thread, just want to get the right ones.

Martin.
as it has been modded i would go for the 7's
johnnyroper is offline Add Infraction for johnnyroper  
this post is currently rated :   OK ?  
Reply With Quote
Old 06 May 2008, 19:04
mark6
Scooby Regular
Join Date: Jun 2004
Posts: 299
Default
Definetly 7's,and its advised to set the gaps at 0.6
mark6 is offline Add Infraction for mark6  
this post is currently rated :   OK ?  
Reply With Quote
Old 06 May 2008, 19:15
dougwrx
Scooby Regular
Join Date: Jul 2005
Location: Grinning :) after getting 11.29@116 with a 1.61 0to60ft at the SSO!!!!
Posts: 325
This is my Scooby. To set up your own Scooby, go to your user cp, and click 'Edit Settings'.
Click here to see my Plus Profile, and Guestbook
Default
My car is on 6's and im running 444/442 @1.3bar , had my car on 7's and it had a misfire when cold changed back to 6's and it was cured. Richard Bulmer who originally mapped it told me his spec c runs on 6's and its pushing 500bhp.


Cheers Dougie
dougwrx is offline Add Infraction for dougwrx  
this post is currently rated :   OK ?  
Reply With Quote
Old 06 May 2008, 21:05
AdamR
Scooby Regular
Join Date: Apr 2008
Posts: 180
View My Scooby
Default
i put 7's in mine last weekend and it STARTED hesitating when cold! But there again my coilpacks are knackered now so that might have something to do with it! :doh:
AdamR is offline Add Infraction for AdamR  
this post is currently rated :   OK ?  
Reply With Quote
Old 06 May 2008, 21:30
reeperb5
Scooby Regular
Join Date: Apr 2007
Location: surrey
Posts: 282
Default
i had a misfire when being mapped on 6's, mapper said go for a colder plug like a 7, problem sorted when he tweaked it
reeperb5 is offline Add Infraction for reeperb5  
this post is currently rated :   OK ?  
Reply With Quote
Old 06 May 2008, 22:08
Skooby53
Scooby Regular
Join Date: Aug 2007
Posts: 415
This is my Scooby. To set up your own Scooby, go to your user cp, and click 'Edit Settings'.
Click here to see my Plus Profile, and Guestbook
Default
OK, thanks for your advice guys. I think I will give the 7's a try and see how things go. I guess its time to lose some skin off my knuckles again at the weekend

Skooby53 is very very happy with Bob R's work.
Skooby53 is offline Add Infraction for Skooby53  
this post is currently rated :   OK ?  
Reply With Quote
Old 07 May 2008, 00:16
scoobyschef
working as usual
Join Date: May 2006
Location: in a kitchen
Posts: 538
This is my Scooby. To set up your own Scooby, go to your user cp, and click 'Edit Settings'.
View My Scooby
Default
6 do the job for what you need if you are goin 350+ then you need to touch the 7's

jim
scoobyschef is offline Add Infraction for scoobyschef  
this post is currently rated :   OK ?  
Reply With Quote
Old 07 May 2008, 00:18
scoobyschef
working as usual
Join Date: May 2006
Location: in a kitchen
Posts: 538
This is my Scooby. To set up your own Scooby, go to your user cp, and click 'Edit Settings'.
View My Scooby
Default
probably the maf playin up if its only happning when cold. is it not settlining well when on idle

jim
scoobyschef is offline Add Infraction for scoobyschef  
this post is currently rated :   OK ?  
Reply With Quote
Old 07 May 2008, 00:28
tarmac terrorist
Scooby Newbie
Join Date: Apr 2008
Location: hertfordshire
Posts: 18
View My Scooby
Default
i have got new NGK Iridium BKR7EIX are these any good for my vers 4 red top sti ? cheers
tarmac terrorist is offline Add Infraction for tarmac terrorist  
this post is currently rated :   OK ?  
Reply With Quote
Old 07 May 2008, 09:27
apalmer
Scooby Regular
Join Date: Aug 2007
Posts: 220
View My Scooby
Default
i've been using these for a few thousand miles now with no issues, i found i got loads more misfires with the PFR7B's. Maybe just me tho
apalmer is offline Add Infraction for apalmer  
this post is currently rated :   OK ?  
Reply With Quote
Old 07 May 2008, 16:38
Barretts Motorsport
Scooby Regular
Join Date: Dec 2000
Location: Canterbury / Kent
Posts: 518
Default
Quote:
Originally Posted by apalmer View Post
i've been using these for a few thousand miles now with no issues, i found i got loads more misfires with the PFR7B's. Maybe just me tho
Try using the PFR7G

It's interesting that lots of people on here, over time, have had issues when converting to the 7B and have then gone back to the 6B.

We were advised by Prodrive back in the mid ninetys to use the 7G (gapped between 0.6 & 0.7) for all modded uk road cars & all jdm cars (modded or not) & have never had a problem with them.

Phil
Barretts Motorsport is offline Add Infraction for Barretts Motorsport  
this post is currently rated :   OK ?  
Reply With Quote
Old 07 May 2008, 16:45
"Taylor"
...soon to return
Join Date: Mar 2007
Location: Truckin milk to the good people of South Wales.
Posts: 944
This is my Scooby. To set up your own Scooby, go to your user cp, and click 'Edit Settings'.
View My Scooby
Default
Interesting point. My 93 wrx import had PFR6G's in it before i changed to
PFR7B's. I never knew there were PFR7G's, although i haven't had any probs with the 7B's, however i am running a reduced gap, i think it was 0.6
"Taylor" is offline Add Infraction for "Taylor"  
this post is currently rated :   OK ?  
Reply With Quote
Old 07 May 2008, 18:48
Skooby53
Scooby Regular
Join Date: Aug 2007
Posts: 415
This is my Scooby. To set up your own Scooby, go to your user cp, and click 'Edit Settings'.
Click here to see my Plus Profile, and Guestbook
Default
Hmmm, the plot thickens then. I am sure the MAF is fine it was only fitted in Feb by Bob Rawle before my re map and the idle is a steady 800rpm. This morning the hesitation had almost gone, maybe the warmer weather is making the cold start less demanding on the plugs. The 6's have only been in there a year and like I said it only started after being on idle for ages at the MOT. Getting confused now!

Skooby53 is very very happy with Bob R's work.
Skooby53 is offline Add Infraction for Skooby53  
this post is currently rated :   OK ?  
Reply With Quote
Old 08 May 2008, 09:10
Barretts Motorsport
Scooby Regular
Join Date: Dec 2000
Location: Canterbury / Kent
Posts: 518
Default
If your having problems with hesitation when cold, then it my be worth considering the coolant temp sensor.

It is not uncommon to have problems with this sensor & it can cause the problems that you describe when it starts to fail.

Phil
Barretts Motorsport is offline Add Infraction for Barretts Motorsport  
this post is currently rated :   OK ?  
Reply With Quote
Old 09 May 2008, 08:07
dynamix
Tester
Join Date: Feb 2006
Location: Cambridgeshire
Posts: 4,910
This is my Scooby. To set up your own Scooby, go to your user cp, and click 'Edit Settings'.
Click here to see my Plus Profile, and Guestbook
Default
Mine runs on Racing 8's - hesitates a little when cold but they arent cold for long. Pick the right grade for your purpose. I'd say 6's will be fine for your purpose.

dynamix is chuffed he has found out how to set his mood
dynamix is online now Add Infraction for dynamix  
this post is currently rated :   OK ?  
Reply With Quote
Reply


Thread Tools