Eddie,
The minimum you need to do to the block is the following.
Machine work minimum:
tank block/clean out oil gallery
Bore or .020 oversize
grind or polish crank
R&R cam bearing
R&R freeze plugs and oil gallery plugs
check deck and head for flatness.
check/correct line bore (main bearings) with what you described last
time, this is important.
re-grind/check for straightness on cam, if you don't get a 266
re-surface or replace lifters
pin-fit pistons
Check flywheel friction surface and ring gear.
Optional:
balance rotational mass.
lighten flywheel
Parts: Minimum
new pistons and rings
new cam, main and rod bearings
new lower gasket set and head gasket
freeze plugs
oil gallery plugs
oil pump, depending on condition of your old one. From what you
describe of the engine, I suspect new will be in order.
Timing chain and gears.
Check your crank damper pulley. If the rubber is cracked, it needs replacing.
clutch kit?
new lifters if old ones are not resurfaced.
This is what I consider minimum. So, look through Moss or VB catalogs
to get an idea o $$ and add up your parts costs. then find yourself a
machine shop that KNOWS what to do on these small engines AND have
the correct tools. Some machine shops may not have tools small enough
for some of the jobs like checking the line bore and reaming the cam
bearings. Find out what there labor charges are for the above items.
That should give you an idea what will fit in your budget.
That should get you started.
At 5:27 PM -0400 7/27/03, Eddie Sheffield wrote:
>Hey all!
>
>You all saw my recent message about my "engine woes." Going to have
>to do some kind of rebuild, just trying to decide exactly what to
>do. It's a 1275, and I'm not interested in building a race motor or
>even a very "hot" street engine. I *would* like to try and pick up a
>little bottom end "oomph." I live in southwest VA in the mountains,
>and have a pretty steep hill to climb just getting to my house. On
>the other hand, I'm pretty financially constrained right now so
>while I want to do a decent rebuild, I can't afford the whole menu
>of machine work, though I'll get what I can. The head seems to be in
>pretty good shape so for the time being I'm going to leave it alone
>for the most part.
>
>Anyway, boring to 20 over is a must - I can tell that from my bore
>gage. The most likely thing is that I'll just do an otherwise
>"stock" rebuild using the standard compression (8.8:1) pistons. The
>only variable I'm considering is maybe a new cam. With everything
>else basically stock (for now) would I be wasting my time going with
>something like a Kent 266? I'm not a cam expert for sure but from
>what I've been able to gather it looks like it might be a good
>choice. Should give me some of the lower end boost I'd like. I do
>have a second head that I'm probably going to experiment with
>porting at some point in the future, but nothing too wild.
>
>I guess I'm trying to figure out what I can do with the bottom end
>on the budget I've got (thinking $750 to maybe $1000 if I really
>stretch it) that will be at least as good as stock with everything
>else stock and even better when I get around to some head / carb /
>ignition tweaking. Heck, with the shape it was in, even bone stock
>in good shape would be a big improvement!
>
>Thanks!
>
>Eddie
>'71 Midget - Bebop
/// unsubscribe/change address requests to majordomo@autox.team.net or try
/// http://www.team.net/mailman/listinfo
/// Archives at http://www.team.net/archive/spridgets
|