10 replies to this topic

[hanra]

Just noticed I had fitted BP6FS plugs in my motor, which is what the NGK website has told me.

But I've found in the GMH workshop manual it recommends AC Delco 44T plugs.

Going by a spark plug cross reference chart online, a 44T is equal to BR5FS.

I'm running a stock dizzy with Pertronix electronic ignition module and a stock coil, and I'm Not using the resistance wire.

Should I perhaps be running BP5FS instead?

[hanra]

I'll give the BP5FS a go. I'd rather the non resistor plugs.

[71Ranger]

Hi Brad, the only difference between those two plugs is the heat range- the higher the number the cooler the plug. For stock motors they tend to recommend a 5 temp range, the warmer the engine the cooler they recommend. I use 6 in my CK. Cheers Brian

[TerrA LX]

How do your plugs look now?
What make you think you heed a hotter plug?

[TerrA LX]

AFIK BP5FS is recommended for standard cars and BP6FS is for SLR5000. Probably more due to intended driving style, as Holden used the same basic motor right across the range bar L34.

[hanra]

How do your plugs look now?
What make you think you heed a hotter plug?

 

 

I fouled a plug or two just recently as the car was doing many short trips, such as out of the shed, onto a tow truck, off a tow truck back on a tow truck, into the shed, out of the shed for a wash, back into the shed etc etc... it was running on the Auto-Choke every time. And during the course of its 1400 klms that Ive done it, its only ever done short trips around town.

 

The GMH Workshop manual suggests 44T plugs which seem to cross reference over to a 5 temp rating plug. My motor is has a cam, but otherwise stock intake/exhaust and gets driven sedately.

Edited by hanra, 01 July 2015 - 09:25 AM.

[TerrA LX]

auto choke incorrectly set?

 

hotter plugs be a terrible and possibly terminal option.

[Shiney005]

I am surprised you haven't found an original set for it Brad. They come up now and again.

 DSCF0589.JPG   156.83K   1 downloads

[hanra]

Yeah I seen a set of 8 on Ebay for $150....

 

Id just like to know what the temp rating actually is for a 44T? Is it comparable to a 5 or a 6??????????

[arrimar]

The pic above is a later version, period correct has green bands of equal width, if someone's prepared to spend big bucks on plugs they'll want the right ones.