|
|
|
|
| Author |
|
|
Registered
Join Date: Jan 2004
Location: Milwaukee, WI
Posts: 3,360
|
Hotter or Colder Spark Plug
Now that I am turbocharging my 3L and am going to replace the plugs. Do I want a hotter or colder plug.
The plan was NGK BPES (copper) but I was not sure what heat range I should buy them in. Thanks  JC
__________________
Jeremy C. Why's he calling me meat? I'm the one driving a Porsche. (Bull Durham) ----Nothing is far away in this car!--- -2001 996 Turbo |
||
11-10-2007, 06:16 AM
|
|
|
Registered
|
I had the denso IK22s in my car but then switched to NGKs. Im not sure what range but take the manufacturers recommended range and go down 1 or two ranges and start from there.
depending on boost I would gap them between 22 and 25 as to not blow the spark out.
__________________
Kris @ Tech9 86' 930/GT-40R Sold  94' Rustang GT daily (long gone) 2008 C6/Z51 Corvette |
||
|
11-10-2007, 06:50 AM
|
|
|
Registered
Join Date: Jan 2004
Location: Milwaukee, WI
Posts: 3,360
|
So even though factory reccomends a gap of 70-80. You think I should go down to 22-25?
Thanks for the info. I think I will buy in the 7 range for temperature.
__________________
Jeremy C. Why's he calling me meat? I'm the one driving a Porsche. (Bull Durham) ----Nothing is far away in this car!--- -2001 996 Turbo |
||
|
11-10-2007, 07:21 AM
|
|
|
Registered
|
Are we talking standard or metric? You want a small gap when high cylinder pressures are introduced so you dont heat everything up and/or blow the spark out.
__________________
Kris @ Tech9 86' 930/GT-40R Sold 94' Rustang GT daily (long gone) 2008 C6/Z51 Corvette |
||
|
11-10-2007, 03:51 PM
|
|
|
A fellow Pelacanite
|
The 930 should have used a colder plug than the 911.
The correct factory specified plug is the Bosch W3DPO although people say they are too cold really for the street.
__________________
1981 UK 930. G50/01 shortened, 964 3.8RS Fibreglass Body Kit, 18" Alloys 8.5" F & 10" R, 225's F & 285's R, Special Colour Metallic Blue Paint, FIA Sparco Evo's, A/C and Air Pump removed, Electronic Boost Controller, GHL Headers, Tial46 WG. Fitting - New service kit. Needs Fitting - Innovate XD-16 Kit, Kokeln IC. Stephen's K27 HFS, EVO Intake Assy & his Modded USA Fuel Head. 1983 UK 911 3.2 Carrera Sport Coupe. Black, Black Leather with Red Piping, Black Alloy Gear Knob, K&N Air Filter Element, Turbo Tie rods. Needs Fitting - K&N CO Sensor, Round A/F Dial Gauge, Factory Short Shift Kit. http://www.danasoft.com/sig/Iamnotanumber.jpg |
||
|
11-10-2007, 03:52 PM
|
|
|
A fellow Pelacanite
|
Factory gap is 0.024"
__________________
1981 UK 930. G50/01 shortened, 964 3.8RS Fibreglass Body Kit, 18" Alloys 8.5" F & 10" R, 225's F & 285's R, Special Colour Metallic Blue Paint, FIA Sparco Evo's, A/C and Air Pump removed, Electronic Boost Controller, GHL Headers, Tial46 WG. Fitting - New service kit. Needs Fitting - Innovate XD-16 Kit, Kokeln IC. Stephen's K27 HFS, EVO Intake Assy & his Modded USA Fuel Head. 1983 UK 911 3.2 Carrera Sport Coupe. Black, Black Leather with Red Piping, Black Alloy Gear Knob, K&N Air Filter Element, Turbo Tie rods. Needs Fitting - K&N CO Sensor, Round A/F Dial Gauge, Factory Short Shift Kit. http://www.danasoft.com/sig/Iamnotanumber.jpg |
||
|
11-10-2007, 03:59 PM
|
|
|
|
Registered
Join Date: Jan 2004
Location: Milwaukee, WI
Posts: 3,360
|
You are right, I was talking in millimeters. Back cover of Bently says 0.028-0.032"
I went with the NGK BPR7ES
__________________
Jeremy C. Why's he calling me meat? I'm the one driving a Porsche. (Bull Durham) ----Nothing is far away in this car!--- -2001 996 Turbo |
||
|
11-11-2007, 04:17 AM
|
|
|
Registered
Join Date: Feb 2004
Location: louisiana
Posts: 1,478
|
I use one step colder on a bosch plug, that's wr6dc, stock is wr7dc.
lower number is colder for bosch lower number is hotter for NGK I started with sevens, went to sixes, and ordered fives. But the sixes look good, just looked at them this morning, 300 miles on them. |
||
|
11-11-2007, 08:55 AM
|
|
2002 Porsche 996TT
