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WAFT is looking pretty sharp Nathan.

I'll be at the DG motel.  I'm in blue.

You can weld the internal stinger tubing to the perforated silencer tubes at an angle to approximately center them, as long as the angle isn't go great as to keep you from getting them in.  If you want quiet, make the internal stingers go in to the weld between the center section and the baffle cone, or slightly farther.  I made a set for my H2 that went one inch farther forward than that weld and they were very quit compared to normal chambers, without hurting performance.

You get no rest on that track...you might get a couple of breaths on the straight!

That's for sure!  Not much in life makes you have to think so fast.

Nathan, you'd definitely have a good time.  Aren't there any kart tracks halfway near you?

crap, double post

Typo, it's an IRFZ44N.  The dissipation rating is  94 watts.  It's good for a continuous 35 amps at 100 degrees C.  With a drain to source on resistance of 0.0175 ohms and a 7 amp maximum current in this application, I ask it to dissipate about 0.86 watts in the worst case.  The 94 watt spec is meaningless in this case.

That sounds like a blast.  I'm not sure my DT100 racer would last that long.   It does OK on the kart track though  :)  I waited until about a month before I needed to take it to Deals Gap to start on it.  It was a field find and needed a complete rebuild.  I'm sure you'll be OK.

IRFP44N

A field effect transistor has a much lower voltage drop while carrying current, so it generates much less heat than a bipolar transistor.

MOSFET = Metal Oxide Semiconductor Field Effect Transistor.  The ones I use in the regulators I manufacture are National's version called HexFETS, that have a hexagonal cell structure.

I also use Schottky diodes in the rectifier for the same reason, lower voltage drop and less heat.