Never before has so little power been made from so much displacement! (Page 42 of 57)

olaaf,

yes, the pt-22 has a fixed pitch prop and unfortunately that locking mechanism does not look like it makes sense on the combination of propnut and prop flange that i'm using.

I think it has to do with the holes on the end of the crankshaft. it about has to.

got the parts for the next step here now:

that's a crank tone wheel from a Ford Triton V10 (40-1 teeth), a steel v-belt pulley and an interference fit collar for the crank.

I was surprised how difficult it was to get a steel v-belt pulley instead of a cast iron one. all i could find was this 5/16ths one instead of a 1/2" but i'll make it work.

everything needs to get welded together and onto the prop flange and we'll be in business.

I also ordered two of these: http://www.diyautotune.com/catalog/hall … p-489.html (threaded body hall effect sensors)

there are a few reasons for the change from the previous crank/cam sensors:
1)it was noisy as hell
2)it was beating up the alternator bearings. the alternator expects some level of give in it's drive.
3)my ratio was a bit off, the alternator wasn't charging enough at the target idle RPM
4)the crank walks back and forth about 1/10" or so.

I hadn't expected the ability for the crank to move like that, nothing looks out of place, i think it's just a fact of this motor. in it's normal application it would have quite a bit of forward pre-load and there's no need to stop it from going the other way. the front loading surface is a roller bearing. the rear surface is a thrust bushing. this caused my gap sensor to catch on the toothed wheel. damage was definitely accumulating, not sure how long it would last.

with the new setup, crank walk won't affect anything as long as it does not runout more than 2mm, we'll be in business.

Then, for the cam pulse, i'm debating what i want to do.

option 1) just do without. i can lie to megasquirt and tell it that it's running a 10cylinder even fire waste spark motor. everything will run right, but the scaling on the fuel values will be all wrong.

option 2) install a hall effect sensor in the valve cover of the #1 intake valve. the sensor can detect when the valve is depressed and get me my 720degree synchronization pulse.

here's a pic to make it a bit clearer

the nice thing is i've been thinking about this one for a bit. so i even have an extra valve cover that isn't in very good shape (it's cracked in a few spots) so it would be no loss to modify it.

my thought is to try option 2 and if i can't get it to work right, screw it and go to option #1.

i'd also lose atomization. i'm using very fine injector nozzles that help with the super low compression ratio. if i go with a 360 sync instead of a 720 sync i'll have 2 pulses of fuel and one will sit in there for quite a bit. remember how slow this motor spins (1900rpm max)

RFG?

RFG = ReFormulated Gasoline.  The new EPA mandated fuel that doesn't work well w/ unpressurized fuel systems (vented tanks & carburetors).

It does however work really well w/ pressurized fuel systems because as soon as the fuel leaves the pressurized injector rail (is shot into the manifold), it is boiling.

As I recall there is also a winter vs summer formulation? I am unclear as to the effects of summer vs winter, low vs high altitude and california vs the real world but I know there are some significant differences.

*LOL*

man up... it looks more complete than what i started with: http://www.ebay.com/itm/2-Row-18-cyl-Ra … 4aadafd4a6

good for at least 2000HP and BS free in a Lemons race!

Crossed-fingers bump

so you thinking gingerman or autobahn for it?

Wimmen. Once they have a kid they think that should take precedence over everything else.

Chances are your going to have to spend an unreasonable amount of time before the race on it no matter when you race it, so the question is when does she want you to spend the unreasonable amount of time on your car.  march-april, may-june or september-october

Jim and I were talking while tossing 700lb motors around his garage the other day about you and your adventures. Glad to hear you are still plugging away but at what may be a more easily sustained pace.