K-90 nitro engine
05-01-2007 | 12:27 AM
#2
My Feedback: (1)
RE: K-90 nitro engine
I had a K .45 for a while but it blew up on me twice so I ditched it.
They require a lot of oil (205 if possible) and low nitro to get them to run right. They don't run high nitro in Europe or Asia as a rule because of the high cost of it there so the engines are built that way.
If you need a remote needle for it, Andy Brown at www.cmdracing.com sells them. His remote needles are the Kalistratov's and you need the coarse threaded one and large fuel line.
Al Hobbs is one of the very few people here in the US that carry the engines and parts although Andy Brown does have some parts but you won't find them on his site.
They require a lot of oil (205 if possible) and low nitro to get them to run right. They don't run high nitro in Europe or Asia as a rule because of the high cost of it there so the engines are built that way.
If you need a remote needle for it, Andy Brown at www.cmdracing.com sells them. His remote needles are the Kalistratov's and you need the coarse threaded one and large fuel line.
Al Hobbs is one of the very few people here in the US that carry the engines and parts although Andy Brown does have some parts but you won't find them on his site.
05-01-2007 | 09:42 AM
#4
My Feedback: (1)
RE: K-90 nitro engine
Twenty would be a good percentage to work with. Big-blocks work better with low nitro anyway.
I found out that my K-45 was one of a few that were brought into the country illegally, that someone had brought them in without paying duty on them and it was a European version that wasn't made for high nitro. Not knowing much about these engines at the time and thinking that I was getting a great deal on one new in the box, I snapped it up. The engines are a work of art my looking at them but my main problem was blowing the rear bearing seal. When it went, it would take out the lower con rod needle bearings with it. When I pulled the head off I found the seal and a needle bearing wedged between the piston and the sleeve.
I called Al Hoobs, sent the engine to him. He did a complete rebuild for me and no labor charged!
I never got hte engine to run right, I hope thta you have better luck than I did. I've been told that the .90's are screamers and have been used with success in twin hydro versions.
I found out that my K-45 was one of a few that were brought into the country illegally, that someone had brought them in without paying duty on them and it was a European version that wasn't made for high nitro. Not knowing much about these engines at the time and thinking that I was getting a great deal on one new in the box, I snapped it up. The engines are a work of art my looking at them but my main problem was blowing the rear bearing seal. When it went, it would take out the lower con rod needle bearings with it. When I pulled the head off I found the seal and a needle bearing wedged between the piston and the sleeve.
I called Al Hoobs, sent the engine to him. He did a complete rebuild for me and no labor charged!
I never got hte engine to run right, I hope thta you have better luck than I did. I've been told that the .90's are screamers and have been used with success in twin hydro versions.
05-01-2007 | 11:21 AM
#5
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From: Goodrich,
MI
RE: K-90 nitro engine
I appreciate you're input on this subject. I just recently came into this engine on a trade deal, and the previous owner did'nt really mess with it too much, so he did'nt have a lot of info. Anyway can I get the contact info for Al Hoobs? Thanks again
