Cox Stinger Engine

I have no doubt it puts out more power than an old no-boost baby bee. It will also put out more power than a modern baby bee because of the venturi through the fuel tank is larger than on the bee tank.

The cylinders available new are the best porting available. They have one boost per bypass. The 2 boost per bypass actually hurts scavenging which is why the single boost per bypass is superior. With SPI and the intake porting of the larger modern stunt the engine produces as much power as possible.

Cox International sold that engine to Hobby King
coxengines.ca

However the killer bee II has the larger intake than a surestart, which appears to be what the stinger is based on.
http://coxengines.ca/cox-.049-engine-killer-bee-ii.html

Phil

http://hobbyking.com/hobbyking/store/__45398__Cox_049_Stinger_Glow_Engine.html


SPI = Sub-Piston Induction, air is let in through the exhaust under the cylinder skirt.

pkrankow wrote:I have no doubt it puts out more power than an old no-boost baby bee. It will also put out more power than a modern baby bee because of the venturi through the fuel tank is larger than on the bee tank.

The cylinders available new are the best porting available.  They have one boost per bypass.  The 2 boost per bypass actually hurts scavenging which is why the single boost per bypass is superior.  With SPI and the intake porting of the larger modern stunt the engine produces as much power as possible.

Cox International sold that engine to Hobby King
coxengines.ca

However the killer bee II has the larger intake than a surestart, which appears to be what the stinger is based on.
http://coxengines.ca/cox-.049-engine-killer-bee-ii.html

Phil

http://hobbyking.com/hobbyking/store/__45398__Cox_049_Stinger_Glow_Engine.html


SPI = Sub-Piston Induction, air is let in through the exhaust under the cylinder skirt.

So it's Bernie that's scorching the engines to HK? cool didn't know that.
Yup the surestart cylinders are what Bernie and Matt are making their new TD cylinders from which have the single boost port per bypass and boy do they run! and about the surestart backplates I have one that I took the restrictor out of and drilled the snorkel and i'm getting close to 18k out of it so yeah, give it air and fuel and it wakes up lol Going to put it on something...sometime. (Bandit)

TDbandit wrote:
Yup the surestart cylinders are what Bernie and Matt are making their new TD cylinders from which have the single boost port per bypass and boy do they run! and about the surestart backplates I have one that I took the restrictor out of and drilled the snorkel and i'm getting close to 18k out of it so yeah, give it air and fuel and it wakes up lol Going to put it on something...sometime. (Bandit)

How are you checking the RPM? I have a vibrating spring type tach on a plastic plate you dial the spring in and out on to find maximum swing and look at the guage and that's your RPM.

Sig Skyray wrote:

TDbandit wrote:
Yup the surestart cylinders are what Bernie and Matt are making their new TD cylinders from which have the single boost port per bypass and boy do they run! and about the surestart backplates I have one that I took the restrictor out of and drilled the snorkel and i'm getting close to 18k out of it so yeah, give it air and fuel and it wakes up lol Going to put it on something...sometime. (Bandit)

How are you checking the RPM?  I have a vibrating spring type tach on a plastic plate you dial the spring in and out on to find maximum swing and look at the guage and that's your RPM.

I use the Globee IntelliTach and a Hanger9 micro digital tach. both are good tachs and are easy to use! heres a pic.

TDbandit wrote:

pkrankow wrote:I have no doubt it puts out more power than an old no-boost baby bee. It will also put out more power than a modern baby bee because of the venturi through the fuel tank is larger than on the bee tank.

The cylinders available new are the best porting available.  They have one boost per bypass.  The 2 boost per bypass actually hurts scavenging which is why the single boost per bypass is superior.  With SPI and the intake porting of the larger modern stunt the engine produces as much power as possible.

Cox International sold that engine to Hobby King
coxengines.ca

However the killer bee II has the larger intake than a surestart, which appears to be what the stinger is based on.
http://coxengines.ca/cox-.049-engine-killer-bee-ii.html

Phil

http://hobbyking.com/hobbyking/store/__45398__Cox_049_Stinger_Glow_Engine.html


SPI = Sub-Piston Induction, air is let in through the exhaust under the cylinder skirt.

So it's Bernie that's scorching the engines to HK? cool didn't know that.
Yup the surestart cylinders are what Bernie and Matt are making their new TD cylinders from which have the single boost port per bypass and boy do they run! and about the surestart backplates I have one that I took the restrictor out of and drilled the snorkel and i'm getting close to 18k out of it so yeah, give it air and fuel and it wakes up lol Going to put it on something...sometime. (Bandit)

I recall Bernie mentioning it in one of the threads here. I could be mistaken though.
Phil

Bernie sells that cylinder/piston set as a repro-Tee Dee unit. I bought one for my CEF Reed-Speed model engine, along with the red back-plate with the oversized venturi. The engine is a screamer with a std. plug and single copper gasket running Sig 25% nitro. I initially experienced fuel-draw issues though. I was running suction from a custom made uni-flow hard-tank, using small diameter fuel line. Bubbles formed and ran back through the line toward the tank when the engine ran-out it's exhaust-prime. I had plumbed the tank with 1/8" diameter copper tube.. so I increased to a large-size fuel line by making a compression sleeve for the end connecting to the small nipple on the NVA. This was enough to get the engine to draw fuel consistently.. and sustain peak rpm.




That red back-plate is said to work best with a fine-thread needle conversion.. and run on a fuel-bladder. I don't have any experience with bladders yet.

Wow, I am assembling that exact same engine with a Texas Timers fine NVA.

Phil