Rand Gravon

What spark plug would members recommend for general street use in a moderate climate. My car is a fair weather driver Sundays and sunny days and is seldom driven in the winter. Less than 3000 miles a year. Any tricks to replacing?

black944 turbo

I just use stock. They work great. DON"T USE BOSCH PLATNUMS. I have had bad luck with them and the previous owner had them in the car for a few hundred miles and said they where realy bad.

Porsche-O-Phile

Welcome to Rennlist. The stock Bosch ones work fine. I've been told that by going one heat range cooler you can actually increase power a little, but I've yet to see any dyno tests to back that up. I'd stick with stock. Removal & replacement is a piece of cake.

pikey7

Just pull the boot, and not the wire! experience rules......the wallet

pcarphanatik

My local autoparts store did not stock the bosch.

I asked for the NGK equivalent, they were in stock and also work just fine.


FYI, you may want to use the search feature, there are a few threads about this already.


Also as porsche-o-phile mentioned; spark plug replacement is easy. Don't be scared by the idiots at the parts counter saying, "OMG PORSCHE!, Don't you have to drop the engine to get to #2 and #4!?!??!"

black944 turbo

As mentioned ez job. Good idea to have a torque wrench and some anti seaze

WesM951

I use NGK Iridiums, they are 2 heat ranges colder. In the words of Dr.Boost "We need more boost".

Anywase, the part number is in a older post of mine about spark plugs.

eclou

NGK BPR7ES. Memorize it.

hosrom_951

Stock W7DC (whatever it is called) with 8mm plug wires.

Used the Beru Ultra-X quad electrod, car ran great for 10,000kms, but then started behaving "funny", switched back to stock, ran smooth ever since.

Tom M'Guinn

Stock works great.

Mike1982

I put in one range colder because I have Guru chips, reli-boost, 3 bar fuel reg, tial 38mm wastegate. As far as performance, don't notice much, but I was wondering what is the good/bad to going say colder or hotter? I know if you go hotter plug, you can't run higher boost because it will get TO hot. But how about cold? What is the performance fact or THOUGHT on colder plugs? Plus, any advantage in a colder plug for normal use, just street driving?

theedge

These are what I use.

Waterguy

The advantages of a colder plug are strictly at high boost (less risk of detonation.) The disadvantage is that they don't get hot enough under normal (off-boost) driving to burn off carbon deposits, especially under short distance, stop and go driving conditions. This can lead to poor idle, plug fouling, shorter plug life, higher emissions. If you do strictly commuter driving, I would stick with stock heat range.

Where do you find them in town Edge? And are the NGK BPR7EY essentially the same plug?

Jaak Lepson

You need two sets:

Stock range for the street
1 Range Colder for the Track

Luis de Prat

Porsche dealer spark plugs for the 951 are Beru Ultra single prong.