66 Valiant: Pulled the head with everything still attached, including the headers, intake, carb, nitrous system, etc. Top of piston looks good, cyl wall has no scoring. Thinking broken ring or collapsed ring land. Next step, pull the short block, and look inside.

65 Valiant: Brakes are done, wheels back on, and moved out of the way, for now.

_________________
Charrlie_S
65 Valiant 100 2dr post 170 turbo
66 Valiant Signet 170 nitrous
64 Valiant Signet
64 Valiant 4dr 170
64 Valiant 4dr 225

66 Valiant: Short block is out, and # 5 piston, top ring, in 4 pieces. Will check the ring lands, tomorrow.

_________________
Charrlie_S
65 Valiant 100 2dr post 170 turbo
66 Valiant Signet 170 nitrous
64 Valiant Signet
64 Valiant 4dr 170
64 Valiant 4dr 225

66 Valiant: Woops, cracked piston, between the second and third ring lands.
Got to bust my butt. need to have this engine repaired, and back in the car, running, by Monday. Pre admission testing on MOnday, and surgery on my elbow, on Wed. Will limit what I can do for 7-10 days. Heading for the shop. be back later.

_________________
Charrlie_S
65 Valiant 100 2dr post 170 turbo
66 Valiant Signet 170 nitrous
64 Valiant Signet
64 Valiant 4dr 170
64 Valiant 4dr 225

Best Wishes to you Charlie,
you are one tough and determined dude.

_________________
Doo Ron Ron and the Duke of Earl are friends of mine.....
https://www.youtube.com/watch?v=uX8Nj8ABEI8

Short block back together. Work to continue later, today. Need to earn some money, before that.

_________________
Charrlie_S
65 Valiant 100 2dr post 170 turbo
66 Valiant Signet 170 nitrous
64 Valiant Signet
64 Valiant 4dr 170
64 Valiant 4dr 225

Sweet! If any Slanter can do it, you can.

BTW, thanks again for the 904 advice! All is working well with that although I may play with band adjustments a little to tune the shifts a bit.

Lou

_________________
Home of Slant6-powered fun machines since 1988

Way to motor Mr S !

Go Charlie! Go!!!!!

_________________
2 Mopars come with Spark plug tubes. One is a world class, racing machine. The other is a 426 CI. boat anchor!

12.70 @ 104.6

66Valiant: Think I found out why it broke rings and piston, Detonation. Crank damper had slipped about 10 degrees. Thought I had about 15 degrees total advance, but had about 25 degrees. I usually put a line across the damper, from the timing "notch", across to the hub. As long as the line is straight, the damper is OK. If the damper slips, the line is offset. I didn't do that to this damper, forgot, I guess. Replacement damper, is marked.

I have been running a Edge hybrid converter, but this engine has the late large crank pocket (used a bushing), but I think, I will try a new FTI converter, I have on the shelf. It is a large pilot, large spline 9 1/2 inch. It will be a good comparison, as the engine has had no changes, just repair. However did change the rear ratio from 3.91 to 4.56

_________________
Charrlie_S
65 Valiant 100 2dr post 170 turbo
66 Valiant Signet 170 nitrous
64 Valiant Signet
64 Valiant 4dr 170
64 Valiant 4dr 225

Sounds like great progress, Charlie. Bummer about the damper/timing, but nice to figure that out.

I love doing experiments too...

Lou

_________________
Home of Slant6-powered fun machines since 1988

66 Valiant: Engine and new converter in and running. Still need to do a hot valve adj, and set timing. Not sure about this converter, bangs fairly hard when putting in 1st. Can't check anything else, as there is no place, near me that is not paved with dirt. I'm thinking it might be too tight.

_________________
Charrlie_S
65 Valiant 100 2dr post 170 turbo
66 Valiant Signet 170 nitrous
64 Valiant Signet
64 Valiant 4dr 170
64 Valiant 4dr 225

Was hoping to test the 66 Valiant, this weekend, but not to be. Tonight and tomorrow, rained out.

Did get a cylinder head back from the machine shop, today. Said guides were fine, and opened up the seats for big valves. Now I need to start doing the bowl work. Not sure which engine this will go on. It could be used on the 170 turbo motor, or the 225 high compression engine.

_________________
Charrlie_S
65 Valiant 100 2dr post 170 turbo
66 Valiant Signet 170 nitrous
64 Valiant Signet
64 Valiant 4dr 170
64 Valiant 4dr 225

66 Valiant
Finally got to a test-N-tune, at Gainesville. I don't like the FTI converter on motor only. Not enough stall, and "lazy" on the launch. It works on nitrous, though. Don't know which, or both made the difference, the converter, or the change from 3.91 to 4.56 gears.
60 foot...........1.669
1/8............7.766 @ 86.64 mph
1/4.............12.409 @ 103.02 mph
Best ever on all three

_________________
Charrlie_S
65 Valiant 100 2dr post 170 turbo
66 Valiant Signet 170 nitrous
64 Valiant Signet
64 Valiant 4dr 170
64 Valiant 4dr 225

Those are good numbers Charrlie

_________________
62 Val, 66 Dart, 16 Ram 2500 Mega

Great! The folks at Motormile will really get a kick out of it.

Every time I go over there, a bunch of people check out my cars. Their eyes get really wide when they ask what motor and I tell them it's a Slant.

Lou

_________________
Home of Slant6-powered fun machines since 1988