Glow plugs for Ofna nitro engines

[zeus r/c]

What plugs should i be running in these i have 2 26 and 1 28 also am looking for a replacement carb for 1 of the 26 and a cen 26 who compatible with these thx

 

[Littlemotor]

What plugs should i be running in these i have 2 26 and 1 28 also am looking for a replacement carb for 1 of the 26 and a cen 26 who compatible with these thx

Share some pics, we are gonna need more information as OFNA offered about eleventybillion .28’s, and .26’s over the years. Gonna need to know what the shim-stack is, or what it came out of-so quality pics & more info will help greatly here.

 

[zeus r/c]

This is my ofna 9.5 mbx and the other 2 came off of a ofna ultra lx

 

[zeus r/c]

This is my 3.3 revo

 

[Littlemotor]

This is my ofna 9.5 mbx and the other 2 came off of a ofna ultra lx

View attachment 248723

Nice sir! Don’t see those old girls that often anymore-let alone that clean.

Without checking piston to head clearance you will be fine at 25% and a hot/ultra hot plug. If you wanna run 30%, I’d for sure check your clearance-as you’ll likely require at least another .1mm shim in your stack. Always read your piston to verify your engine is happy-that’s the best advice I can give for sure. Math is math, but it ALWAYS boils down to what your engine likes, and if it’s happy with your combo. Track surface, vehicle weight, ambient temps/humidity, traction, gearing, etc., will all contribute to what it wants. Hope this helps. If you have any more questions, feel free to tag me-and I’ll do my best to sort you out.

 

[zeus r/c]

My cen matrix with ofna 26 its a beast and my 3.3 nitro rustler i have a few more ill post up later thx for the add and feed back

 

[zeus r/c]

Nice sir! Don’t see those old girls that often anymore-let alone that clean.

Without checking piston to head clearance you will be fine at 25% and a hot/ultra hot plug. If you wanna run 30%, I’d for sure check your clearance-as you’ll likely require at least another .1mm shim in your stack. Always read your piston to verify your engine is happy-that’s the best advice I can give for sure. Math is math, but it ALWAYS boils down to what your engine likes, and if it’s happy with your combo. Track surface, vehicle weight, ambient temps/humidity, traction, gearing, etc., will all contribute to what it wants. Hope this helps. If you have any more questions, feel free to tag me-and I’ll do my best to sort you out.

I appreciate that good sir thank you so much

 

[Littlemotor]

By the way-your cooling head is installed sideways in the MBX.. Rotate it 90deg either direction you want.

 

[Littlemotor]

I appreciate that good sir thank you so much

Absolutely brother.

 

[zeus r/c]

By the way-your cooling head is installed sideways in the MBX.. Rotate it 90deg either direction you want.

Appreciate that i got these engines in a lot bud so far 1 has been great this 1 I'm jaut putting in a buggy now had it for a couple months

 

[Littlemotor]

Appreciate that i got these engines in a lot bud so far 1 has been great this 1 I'm jaut putting in a buggy now had it for a couple months

Yepper-no problem. That “slot” should always be oriented in the “front to back” position, as that’s what allows incoming air to cool the head button/plug area.

 

[zeus r/c]

Yepper-no problem. That “slot” should always be oriented in the “front to back” position, as that’s what allows inclining air to cool the head button/plug area.

Appreciate that guess I'm gonna have to disassemble it and turn it i think this engine has been broke in and thats it or maybe they did a repinch idk but ill fix that issue now tho

 

[Littlemotor]

Appreciate that guess I'm gonna have to disassemble it and turn it i think this engine has been broke in and thats it or maybe they did a repinch idk but ill fix that issue now tho

No problem-what’s the issue/symptom that you’re not liking with it?

 

[zeus r/c]

No problem-what’s the issue/symptom that you’re not liking with it?

I feel like the plug is a little to long so I'm gonna get a short plug

 

[Littlemotor]

I feel like the plug is a little to long so I'm gonna get a short plug

Ahhhh. Copy that.

 

[Littlemotor]

FWIW-if memory serves; the Force/OFNA engines use a long plug.. Are you sure you’re not experiencing mechanical pinch from a brand new motor by chance? I suppose someone could’ve swapped out the head button for a thinner firedeck unit, but it’s not very likely.. Best thing you can do if you’re worried it’s making contact with the piston is to remove the head, pull the head button, and verify the plug comes right up TO the burn room, but does not actually protrude into it.. Won’t take ya 3min to establish what you’ve got, and what you need.

 

[zeus r/c]

I feel like the plug is a little to long so I'm gonna get a short plug

FWIW-if memory serves; the Force/OFNA engines use a long plug.. Are you sure you’re not experiencing mechanical pinch from a brand new motor by chance? I suppose someone could’ve swapped out the head button for a thinner firedeck unit, but it’s not very likely.. Best thing you can do if you’re worried it’s making contact with the piston is to remove the head, pull the head button, and verify the plug comes right up TO the burn room, but does not actually protrude into it.. Won’t take ya 3min to establish what you’ve got, and what you need.

Hell ya i gotcha ill check it out and see

 

[zeus r/c]

Hell ya i gotcha ill check it out and see

Meaning the plug bottom will be flush with the button on the inside correct

 

[Littlemotor]

Meaning the plug bottom will be flush with the button on the inside correct

Exactomundo brochacho.

 

[zeus r/c]

Exactomundo brochacho.

Lmao awesome appreciate you hermano