Are you using stock rings?
Chrome?
or something special?

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Aggressive Ted

http://cid-32f1e50ddb40a03c.photos.live ... %20Swinger


74 Swinger, 9.5 comp 254/.435 lift cam, 904, ram air, electric fans, 2.5" HP2 & FM70 ex, 1920 Holley#56jet, 2.76 8 3/4 Sure-Grip, 26" tires, 25+MPG

I have a set of rings that came with the Venolia pistons, they are not chrome or moly but the top ring looks different then the #2. I need to do some additional homework to try to figure-out what they are.
I may buy a new set of cast iron rings just so I know what I have.

BTW...
I found a photo of the Guzzi Valiant. (under construction)
DD

Wouldn't a set of Ductile rings be better?

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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

Do you know of any off the shelf ductile iron rings? (3.460 bore)

For the race engines, I like the soft cast iron rings, I can get them to seat quickly and long term life is not an issue... as long as the rings don't snap when you hit the engine with a 150 HP shot.
DD

Not that Iknow of. I agree and use the cast rings in most of my engines, which are "throwaway" motors (stock bore and stock pistons). I have broken a few rings, and pistons, on juice, but I can fix them for less then $50. I do have a couple of sets of TRW "Moly" rings on the shelf, along with some TRW pistons. One set of Total Seal ductile rings to go with the Venolia blower pistons, I got from Josh. I hope to be able to rebuild my .040 turbo 170 this year, and start on a "full boogie" race motor. Both those motors will get good parts.

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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

It sounds like you and I are on the same program. I have 2 'broken' engines that we are patching back together, both have piston problems.

I also have enough high quality parts to build a new HP 225 from the ground-up, that is this engine.
Now if I could just locate a nice crankshaft... that would get this engine on the assembly "fast track".

BTW, I never have any luck with moly rings on spray engines, the moly gets "blown-off" the ring surface.
DD

Thanks for that tidbit. The only moly ring motor I have run nitrous on, was my turbo motor, without the turbo. Ran about 3-400 lbs of nitrous thru it, before I got greedy and tried a 175 shot on a 170 motor. When I pull it down to replace the bad pistons. I will take a close look at the rings.

_________________
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

Got all the pistons and rods assembled, here is a shot of the parts:



I have to say that the TiNi pins look pretty cool:



And the coated pistons... well, they are coated.
I'm still not sure about that stuff but I have to say that I'm getting faster with appling the coatings and a little goes a long way.
This is the thrid set of pistons I have done and there is still over 1/2 a bottle of each coating left.
DD

Is the "piston paint " being used because you are spraying the motor or did I miss the post where you discussed this material? Based on the look of the pistons there are at least two different paints/coatings that were applied to the pistons?

Yes, these pistons have two different coatings on them.
The top gets a ceramic base "thermal barrier" coating and the skirts get a graphite based anti-friction coating.

We had a pretty good discussion on the use of coatings in the Twiggy thread, starting around page #6
http://www.slantsix.org/forum/viewtopic.php?t=23948

I have not use this stuff until recently. I most likely would have never used it but was given some to try, so onto the pistons it goes.
We will see if I can use it all up before it hardens in the bottles!
DD

I have been looking at many 68-76 "big pilot" SL6 cranks trying to find one that will take a lot of HP. (I don't like dumping a lot of work into a "sub-standard" one for an all-out race SL6)

The good news, I found a couple cranks that don't have a bunch of deep balance drilling in the rod journal cross-section areas:



The bad news, one of the cranks is a earlier "small hub" unit and the other.... some mis-guided mechanic hack sawed off the flex plate register hub.



Time to go to "plan "B"... I found a shop that is willing to work with me to machine / rework the rear pilot holes on these cranks.
I made a repair ring that we will use to repair the "butchered" crank. The remaining pilot hole needs to be carefully machined-out and we will press-in a repair ring.



The small hub crank will get it's pilot hole opened-up to the big pilot size. (1.810) I will have to use a small hole flex plate and this crank's register hub will be thin... but it will work.

So off to the shop we go... wish us luck!
DD

As noted in a different thread, the Guzzi engine is now installed in the chop top 62 "Rat Rod" Valiant the engine was built for.

Here is a link to the directory with some installation photos, I will post more info in a few days.

Meanwhile, I need to finishing packing the car, we leave in the morning for the ski slopes...
DD

Have fun riding!

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Yeah....Im the one who destroyed this rare, vintage automobile.....

rear trans mount done,shifter welded in,header clearance taken care of,radiator still has a few issues,working on it,shimed left motor mount to get pan clearance,anouther 8 hrs i figure before i fire it up,100 hrs before I drive it,Mark

what motor mount(steel part) --are you using for the left side? that looks different from what i've seen on 62-66 a bodies? Car looks cool with the lowered top-- thanks for sharing the build -up. Lawrence