Hi! I was wondering if I could use a OS P4 glow plug for my MacStar .28? or should I go for colder one?

i mean you might be able to depending on outside temp, humidity, elevation, day of the week, fuel, you're tuning ability, etc

Ohhhh, its getting colder day by day here. Today it was 7°C. I am using 25% Merlin nitro fuel and am pretty new at tuning.

i don't see why P4 wouldn't work, just make sure it takes a turbo plug

Hello Robisss,

If the outside temp is 7ºC, then You should choose P3.

Cheers..

I am already running P3. The thing is that, there is no Hobbyshops in Latvia. I can only order from Lithuania and the hottest one they had was P4. Third world country problems.

Yes, it is a turbo head!
Thank you!

find some 1 not in a 3rd world and mail you a few 4s,list as toy..

Hello Robisss,

Would it possible for You to order from Japan? Btw, I'm from 3rd World Country as well, Indonesia. Haha..

Cheers..

Yes, it is possible! I already searched on ebay and found some P3's. 4x P3 was around 44€. Only problem is the shipping, usually it takes 2 months for a package to come to Latvia during this pandemic thing. I also have some questions about fuel since am new to nitro.
I am using Merlin Expert fuel with 10% oil. It says that its synthetic and castor blend. Will 10% be enough for long engine life? Or should I look at optifuel 20% Nitro and 15% synthetic. Opti and Merlin are only available fuels here.

25% nitro 10% oil is plenty for lubrication. It’s all about the proper tune and not being lean and over heating.
I run 30% nitro 8% oil(synthetic/castor blend) and have engines with over 6 gallons that still run flawlessly and when opened after running all parts are well lubricated.

Thank you! Then I will stick with Merlin. I am running rich since its cold here so everything should be fine.