So that set of cases ended up getting repaired more than satisfactorily and sold on Ebay. It brought a hefty price and I "re-invested" that into more blasty parts. Always more blasty parts!!!!
So now I have a blaster frame sitting out there looking all sad like. With all of the other drag blaster builds going on with all the fancy dancy new parts and HUGE budgets I have decided to build a drag blasty but not the conventional method... (calling up RDZ and writing a blank check)
My plan is to build a "stock" blaster for use on the drag track. I'm shooting for a 300' sand drag monster. My plan is to use a stock bore stock stroke and completely stock frame. In other words, this machine will be completely convertible back to a completely stock blaster with enough wrenching.
I have a few goodies already piled up for this. I traded JonS for a set of busted cases which are going into this build. I have a Driveline 240HD clutch (and may end up getting RDZ 80% overstock springs).
I also have a plan for fuel for this monster.... I will run this on alcohol but my plan is to install enough fuel capacity to run this machine on at least 25% nitromethane. Methanol is 23% oxygen by volume and its stoich air-to-fuel ratio is 8:1. Nitromethane is 53% oxygen by volume and it's stoich AFR is a WHOPPING 3.2:1 because nitromethane is a partial mono-propellant. A small blend of nitromethane doesn't have the literally "explosive" power potential of 90% nitromethane (top fuel) but the way I figure it, there's a theoretical limit to the power output of a stock blaster jug before it rips the jug mounting ears off the sleeve and that magic number is somewhere JUST northward of 70hp. I'm shooting there and I think 25% nitromethane might get me there.
I plan on running a small battery and powering a 12V ignition coil (MSD blaster2 coil perhaps just because everything needs to be "blaster" on this thing)
I also plan on making single plane suspension for the front. I will be running spindle mount rims and tires (I'll get to the application later)
I will be making an extended swing arm with a solid strut and a wheelie bar mount using a stock carrier and axle. The only brakes on the machine will be mechanical disc brakes on the rear.
This one is for all us poor fuggers who can't do it big style...
For the first installment:
A Keihin PJ38 carburetor. This carb has a rich history on this forum. I have managed to trade carb for carb 4 times to get here. I started with an OKO 30mil with a clear plastic bowl. I traded that for a PWK36, then I traded that for a PWK33, and then I traded THAT for this 38PJ. Considering the shear amount of fuel needed to power a dragger engine, I immediately went for methods to increase fuel flow. My modifications so far: A mikuni powerjet and a Mikuni DF52 fuel pump.
Down the throat slide closed:
Looking down the throat slide open:
The powerjet mounting, it's just a tight drilled hole with an o-ring against the body. I bent the mounting tab back to match the curve of the carburetor body. I tapped a 8-32 hole into the body carefully.
The mikuni powerjet kit comes designed to install in a VM series carburetor but I stuck this thing into a PJ carburetor. The fuel supply for the powerjet is supplied from the bottom of the float bowl. Mikuni supplied a "press fit" nipple: