Building a 390XP Monster

[Jacob J.]

Neil used to race a twin 3120

He has something now that when sorted goes much harder

Neil's saw was neat, but it was two powerheads grafted together.

As you can imagine, I'd like to do a true twin cylinder like the Solo Twin- two 372XPW cylinders side by side
with a balanced alternate-throw crank and one crankcase. There'd be a fair amount of fabrication involved
but I've sketched it out roughly and it's doable.

 

[gink595]

Who can't turn a head?.........Now show us the combustion chamber......That's what makes the head work!

Who helped you build yours Dennis?

I can see the inspiration you or who ever had:hmm3grin2orange:

 

[MCW]

Neil used to race a twin 3120

He has something now that when sorted goes much harder

What? Neil has bought Al's ported Chinese 365?

 

[Dennis Cahoon]

Who helped you build yours Dennis?

I can see the inspiration you or who ever had:hmm3grin2orange:


Gink!......Looks like your inspiration might've come from this old beat up head!.....Hahahahahahahaha!

 

[gink595]

Speaking of Inspirations....That picture doesn't aid you in your "man-to-hand" time does it!? HAHAHAHAHAHAHAHA-HA

 

[Dennis Cahoon]

Speaking of Inspirations....That picture doesn't aid you in your "man-to-hand" time does it!? HAHAHAHAHAHAHAHA-HA

No, but this one does!......Hahahahahahaha!

 

[gink595]

Throw her in a tent and you'd have a "Bounce House" for the kids!

 

[Dennis Cahoon]

OK then......Now let us see the combustion chamber.

 

[Trx250r180]

OK then......Now let us see the combustion chamber.

cant do that, the saw would be topless ........

 

[blsnelling]

OK then......Now let us see the combustion chamber.

Hahahahahahahaha

 

[gink595]

OK then......Now let us see the combustion chamber.

You first!

 

[wendell]

Ibl

 

[gink595]

Here's a teaser...

 

[blsnelling]

Sweet! This is my first to see most of these pics too. Gink, it's looking great.

 

[gink595]

Sweet! This is my first to see most of these pics too. Gink, it's looking great.

Yeah there is a reason for that! (I had lost my usb cable for my camera)

 

[Dennis Cahoon]

You first!

No problem!.......Just wondered if you were give'n Bradley a little toroidal head.......Hahahahahahaha!

 

[tlandrum]

so are you just putting on the 2 piece head or are you going to make it run with a intake block ,bigger carb,pipe

 

[gink595]

No problem!.......Just wondered if you were give'n Bradley a little toroidal head.......Hahahahahahaha!

Dennis, did you build that? I'm sure I seen that same pic on a website somewhere?


Here is one that "I" built.

 

[Dennis Cahoon]

That's not one of my heads, but it's not a problem to build toroidal shaped head. Good luck on the combustion chamber. Getting it shaped and cc'ed right for the fuel you're running is the trick......You shouldn't have to cut more than once or twice........Hahahahahaha! Where's the compression release?

 

[blsnelling]

so are you just putting on the 2 piece head or are you going to make it run with a intake block ,bigger carb,pipe

Gink, do you know anything about pipes?