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  #13  
Old January 7th 05, 09:37 PM
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Tim Long wrote:
Our 140 is coming up on 1600 hrs TBO.

We really hate what a dog it is and would like more power.

Planning ahead, we've thought of a few options:

1 - 160 hp conversion (this is almost the minimum we'd do)


If you're already doing an overhaul, this is probably the most
cost-effective option on your list.

2 - Powerflow exhaust (article in Plane and Pilot claims 20% power
improvement - can it be combined with #1?)


This one is good if your current exhaust system needs a lot of work
and replacement parts. It's a bit pricey otherwise. The 140 owners I
know that have installed it are very happy with its performance.

3 - 180 hp conversion

Anybody know about praciticalities, costs of #3 above? I know it

would
require extra $$ for dissimilar engine exchange, STC costs, and
cowling/engine mount mods.


That's the biggie. I know two people who have done the conversion
(was available from Avcon). It's popular out here in the mountainous
west because the 140 is somewhat limited at high density altitudes
found at mountain airports in the summer. Both of the owners were
happy with the resulting performance, but both said that they'd never
do it again. It was more expensive than they thought it would be (lots
of mods required), it took months to complete, they had difficulty
working with the current STC holders (not Avcon) and in the end, they
still had a 140.

John Galban=====N4BQ (PA28-180)