Glow plugs

[dr gary turner]

Ran standard OD287's for years but the dyno said a colder plug made more HP so I've switched to the 289.

The 287 and even the 277 work better when the air temps get below 10C/50F.

NOW THAT IS GOOD INFORMATION
Based on objective data.

Very interested in other findings from dyno testing.

 

[Tim Kish]

Ran standard OD287's for years but the dyno said a colder plug made more HP so I've switched to the 289.

The 287 and even the 277 work better when the air temps get below 10C/50F.

Any changes in reliability or tuning?

 

[Terry Keeley]

NOW THAT IS GOOD INFORMATION
Based on objective data.

Very interested in other findings from dyno testing.

Gonna crank it up again soon after trimming another 1/4" off the wheel and might have some info to share then.

Any changes in reliability or tuning?

The only difference I found was that you havta be extra careful with the needle, the heavier element will hang in and you can hurt stuff where the hotter plugs will act as a fuse.

 

[Joe Warren]

Plugs in general Joe, big engines or small.
I have 91RS not 101's

Yes the plug is But the Packing used & the wire Is Not, Odonnell 289 289T Has a Double wad packing & can stand a lot of abuse before failure, MC8 is no were as stable on the wire as a MC9. Small motors dont seem to care. BIG BLOCK 91 & 101 Motors do.

 

[Joe Warren]

Gonna crank it up again soon after trimming another 1/4" off the wheel and might have some info to share then.



The only difference I found was that you havta be extra careful with the needle, the heavier element will hang in and you can hurt stuff where the hotter plugs will act as a fuse.

Fuse, pow.....

 

[Timbo Whalen]

Al Hobbs sells plugs... good prices...

https://www.intlwaters.com/threads/2022-glow-plugs4-standard-plugs-at-4-00.82660/

Frank, the Rossi's are as good as anything else out there now, and before, IMO. And a lot less expensive. Been using them since the 80's.

 

[Grimracer]

os 8 is the best plug have ever used in a 21.. my experience.

Grim