"houstondan" wrote in message
oups.com...
mind sharing some prices with & without the hp upgrade??

thx


dan


Dan,

I can't answer as to overhauls, as prices will vary from one engine shop to
another. The engine shop I used charges $13k to overhaul an O-235-L2C,
which includes inspection and casework, inspection and possible replacement
of the cam, inspection and possible replacement of the crank, new cylinders
and pistons, new mags, plugs, wires, etc..

The 125 HP upgrade consists of installing 9.3:1 compression pistons, and, if
not already in place, an external oil cooler. From Air Mods NW, which holds
the STCs, I purchased the STCs, an external oil cooler and shrouds, and an
EGT/CHT guage. I let the engine shop supply the high compression pistons,
and the oil cooler hoses, and install the oil cooler and CHT/EGT.

Between my engine not needing a few accessories in the overhaul, and the
extra work for the mods, I paid $14k to the engine shop, which also put in
new engine mounts, repainted the mounting brackets, and did a beautiful job
with the wiring. I paid Air Mods NW for the STCs, the oil cooler and
shroud, and the EGT. I cut and pasted their prices from
www.pipertomahawk.com below :

BASIC KIT PRICES FOR THIS MODIFICATION

Packet of 3 STC's, Engine, Airframe, & Oil Cooler$ 495.00
Set of 4 high compression pistons, weight matched$ 652.00
Pistons only - no rings, pins, plugs, etc. included

Basic Kit Price, plus freight and applicable tax$1,147.00
Pre-Cut Materials Kit for Oil Cooler Mount$ 245.00

Ken Blackman, from Air Mods NW, started this mod years ago with a Grumman
that he had purchased years ago. He's quite happy to talk with people about
the modification, and its history, when he has the time. He has had it
placed in quite a few Tomahawks and a lot of Cessna 152s.

Paul Missman