Re: LPG/CNG cheaper?

[adh@xxxxxxxxxxxxxxxxx (Sandwich Maker)]

" From: Tom Jennings <tomj@xxxxxxx>
" 
" On Mon, 9 May 2005 farna@xxxxxxx wrote:
" 
" What you say below is true. I did my conversion back in 1988, and
" gas price wasn't the reason; it seemed technically sweet (and it
" is). Engine life is probably closer to 500K miles instead of a
" gummed-up 150. Oil stays clean yellow after 5000 miles. I haven't
" torn it down yet obviously but I expect it's immaculate inside.
" No or little ring blowby out the valve cover.
" 
" You should be able to run 12:1 or 14:1 compression. I didn't have
" the money to gamble at the time (since I didn't know then what I
" know now) on my one, expensive-to-me engine, to dedicate it to LP.
" Its about 9.5 to 1 or so, flat-top 290 pistons in the 232 and a
" bit of a mill job on the head.
" 
" On long trips I get 19 - 20 mpg gasoline equivelant (BTUs/mile)
" using th eAUtotronics feedback computer. It would probably be even
" better if I could dial in the advance a bit higher, but I am
" pretty sure I screwed up the head squish space when I built the
" engine. Probably lopping off the (estimated) .040 to eliminate it
" would also dial in compression to where it would do the most good.
" 
" All it takes is money :-)
" 
" I suppose I could build a new high-compression head and install
" that. I've got a 70 head laying around. I would like to switch to
" the aluminum intake.

best would be a '64-7 closed chamber head, 56cc vs 66cc on the '68-'74
[-'76?] heads.

late '70s heads are 74cc.  i -believe- the '80s started there then
shrank; the pistons didn't change but c/r steadily crept up.
________________________________________________________________________
Andrew Hay                                  the genius nature
internet rambler                            is to see what all have seen

adh@xxxxxxxxxxxxxxxxx                       and think what none thought