![]() |
|
|
|
Registered
Join Date: May 2006
Posts: 77
|
Safe Spark plugs for ROW SC 3.0
The [U]Technical Specifications[U] calls for Bosch WR3CC for the '83 ROW SC instead of the WR5DC for the US version. The WR3CC has a lower profile for the electrodes than the US standard (that's what the first "C" in the label indicates.) Both have the same thread length. Is it safe to use the US spec plug in the higher compression ROW engine. My concern is interference at TDC. I suspect that most ROW '81-'83 SC's are running the WR5DC without problem but I wouldn't be on this board if I didn't have a bit of the anal Porsche nut in me.
thanks, Russell '83 ROW SC Cab field find--home to many mice '86 Carrera Targa--RIP 10/1/07 Last edited by rllevin; 11-27-2007 at 06:12 AM.. Reason: new title |
||
![]() |
|
Tired Member
|
I'd be interested in the answer to this as well.....subscribed
__________________
Glenn Daily Driver - '78 911SC RoW Endurance Racer - '85.1 944 Street/Track Project - '86 951 Race Project - 944 Spec |
||
![]() |
|
Registered
Join Date: Jun 2006
Location: North Alabama
Posts: 162
|
Russell,
Here is what I found in earlier posts about this: one of several recommended plugs is the NGK BP7ES, which you can get from Pelican. I just put these in my 81 ROW, so I can't comment any further on them. I can tell you that my car had the WR5DP (platinum version) since I bought it and I put on 8k with them. Can't really complain at all about them. When I tore the motor down recently there were no indication of clearance issues, although the plugs themselves were pretty sooty. Could be a mixture problem as easily as a plug problem. I think you will find the recommended plugs are pretty expensive, which led to my search for something cheaper and move available. ben
__________________
1981 911SC ROW GP White Last edited by munsonbw; 11-27-2007 at 03:08 PM.. Reason: oops, wrong plug number. |
||
![]() |
|
Registered
Join Date: Apr 2003
Location: Maitland, Florida
Posts: 892
|
I'm guessing that the "3" indicated a cooler plug than the "5". I wouldn't want to run a hotter plug than recommended on a higher compression air cooled motor.
Regards, Jerry
__________________
82 911SC Targa (05 Boxster S ) gone, but not forgotten 87 Suzuki GSXR-1100 1953 MG TD Mk II |
||
![]() |
|
Registered
Join Date: Jun 2006
Location: North Alabama
Posts: 162
|
For those who looked earlier, I had the wrong number for my old plugs. They were WR5DP.
__________________
1981 911SC ROW GP White |
||
![]() |
|