silver bullet again

[el gringo]

I am about to start making the conrods for the bullet. Does anyone have experience running this engine and might suggest changing the compression ratio from Bobs 6.3:1. The crank and pistons have been built.

thanks,
Ray M

 

[stevehuckss396]

I built the V4 Peewee and it is fine. Cave you made your camshaft yet?

 

[Dave G]

Hi Ray,
I built my Silver Bullet to print and it runs fine. It will start with the hand crank easily. Also, listen to Steve's advice on camshafts, his V-4 Peewee has a sound that is quite enviable, I wish my Bullet sounded like it. This was the first model IC engine that I built and it always seems to be a favorite at the shows. Good luck with your build and keep us posted. Dave

 

[el gringo]

thanks, I made the cam on the mill with rotary table as per drawings although the intake lobes have the same lift as the exhaust, hope that is not a big deal .Would like to know about Steve's cam design.
Ray M

 

[stevehuckss396]

thanks, I made the cam on the mill with rotary table as per drawings although the intake lobes have the same lift as the exhaust, hope that is not a big deal .Would like to know about Steve's cam design.
Ray M

No big deal Ray. I Changed the lobe design to give my engine a warmer sound. Keep up the good work and post lots of pictures!!

 

[el gringo]

I will send progress pics (I take them as I go), if I remember how to post them!!

Ray M

 

[el gringo]

progress pic

 

[el gringo]

one more pic/bottom of head

 

[stevehuckss396]

NICE!!!

 

[el gringo]

I am getting to a point where I need to decide on a carburetor. Bob's text instructions don't match the drawing I have. He mentions a Bruce Satra carb, and 'some builders ' using a purchased engine.
what carb has been used successfully on the Silver Bullet?
Anyone know of the Satra carb or should I contact Bruce?
If I decide to purchase a carb (OS or whatever) what would be a proper size?
All/any help will be mucho appreciated.

Ray M

 

[Dave G]

Hi Ray, I bought my castings from Bob back in 2000. I think it was the first show that he had them available at. I built the carb to his plans and have been satisfied with it. I'm sure this was his first gen carb design and I know his later plans had a different design and I have also seen these run well on others engines. Mine does seem to run out of fuel at higher rpms but it does start easily, Dave

 

[metalmad]

Looks like u are well into it
Looking great, Will be watching.
Pete

 

[stevehuckss396]

I used his carb on the Peewee V4 of his design. Again it seems to work well.

[ame]http://www.youtube.com/watch?v=1-JRQGPswVA[/ame]

 

[el gringo]

thanks for all the helpful response.
Hope my bullet rus as good as the peewee!

The carb dwgs I have are {MINIMAX carb by bob Shores 1/1/04 #sb- 17, came with set.}
I also have a drwg by Bob Shores that he sent me dated 4/25/02. #sc-1 titled 'small gas engines shores carburetor' dwg note: suitable for engines with.625 to .750 bore.

both are compensated drum type.
any one familiar with either if these?
thanks
Ray M

 

[el gringo]

I turned a boss on the bell housing to take a friction fit delrin doughnut holding a hall sensor. the aluminum disc has the magnet in it and has ten radial settings for timing.

 

[stevehuckss396]

thanks for all the helpful response.
Hope my bullet rus as good as the peewee!

The carb dwgs I have are {MINIMAX carb by bob Shores 1/1/04 #sb- 17, came with set.}
I also have a drwg by Bob Shores that he sent me dated 4/25/02. #sc-1 titled 'small gas engines shores carburetor' dwg note: suitable for engines with.625 to .750 bore.

both are compensated drum type.
any one familiar with either if these?
thanks
Ray M

The carb on Peewee is a minimix

 

[el gringo]

Thanks Steve, I will build the minimax for the bullet

Ray M

 

[el gringo]

Water pump. Gears rescued from a retired Kowasaki VSR drill /redux

 

[el gringo]

Water pump. Gears rescued from a retired Kowasaki VSR drill /redux

 

[el gringo]

prelim pics of assembled engine sans radiator. the funny hose from pump to head is to provide lube water to keep the pump wet for short test runs.
Steve, I used the Bob Shores "small gas engine carburetor" drwg SC-1 dated 4/25/02 ( same as the MINIMAX but a tad larger) Thanks for the suggestion
note on dwg (suitable for engines with .625 to.750 bore)
I am building the radiator by expanding your method shown on the radiator thread, pics forthcoming.

by the way the engine starts and runs nicely

Ray M