Slant Six Forum :: Pistons

: K-B's #KB268 turbo piston (I know you said
: no K-B!). Used Hastings moly rings bought
: direct (follow K-B's ring gap instructions!)
: and the pistons came through Jeg's. This
: piston is the higher quality unit sold under
: the K-B banner. With a 35cc chamber,
: 0.025" deck and 0.045" gasket, we
: got about 11:1 comp ratio. Pistons are very
: high quality and machined on CNC machines.
:
: You can also check on Mopar Performance, but be
: prepared for sticker shock. TRW/Sealed Power
: has dropped many of their pistons, and it is
: our opinion that the Silvolite/K-B is a
: better product. TRW/Sealed Power has gone
: downhill since the big shake-up.

: Hi all, I am preparing to rebuild a 225 /6
: engine and was looking for some current part
: numbers.
: I have 198 rods already and was disappointed
: that all the trw/speedpro catalogues I found
: did not give any piston specs. I hope
: someone can provide a 2.2 l piston part no.
: that is still currrent as mine are out date.
: PS: I am shooting for 10.8 compression and
: something other than Keith Black.
: Thanks in advance for your help!
: Collin

: Our current build-up used the 198 rod with
: K-B's #KB268 turbo piston (I know you said
: no K-B!). Used Hastings moly rings bought
:

:Actually that is exactly what happened to a half dozen circle track racers I know and some even had piston failure (breakage). I was just being cautious but maybe I should give the kb's a second look see.

: I have K-B's in my motor. It got about 15,000
: miles and 450 passes put on it last year
: with no problems. K-B's have kind of gained
: a bad reputation for breaking the top ring
: land. This seems to be from gapping the top
: ring too tight. Open the top ring gap some
: (I think it even says to in the
: instructions) and they are fine. Dennis

Author:	Trouble [ Thu Apr 25, 2002 12:57 pm ]
Post subject:	Pistons
Hi all, I am preparing to rebuild a 225 /6 engine and was looking for some current part numbers. I have 198 rods already and was disappointed that all the trw/speedpro catalogues I found did not give any piston specs. I hope someone can provide a 2.2 l piston part no. that is still currrent as mine are out date. PS: I am shooting for 10.8 compression and something other than Keith Black. Thanks in advance for your help! Collin cmwolfe@accesscomm.ca

Author:	Smith [ Thu Apr 25, 2002 3:19 pm ]
Post subject:	Re: Pistons
Our current build-up used the 198 rod with K-B's #KB268 turbo piston (I know you said no K-B!). Used Hastings moly rings bought direct (follow K-B's ring gap instructions!) and the pistons came through Jeg's. This piston is the higher quality unit sold under the K-B banner. With a 35cc chamber, 0.025" deck and 0.045" gasket, we got about 11:1 comp ratio. Pistons are very high quality and machined on CNC machines. You can also check on Mopar Performance, but be prepared for sticker shock. TRW/Sealed Power has dropped many of their pistons, and it is our opinion that the Silvolite/K-B is a better product. TRW/Sealed Power has gone downhill since the big shake-up. sgw041454@aol.com

Author:	Smith [ Thu Apr 25, 2002 3:29 pm ]
Post subject:	Re: Pistons
Also found a Sealed Power number; 533P used on 86-90 2.2 turbo motors. Used Hastings 4222 rings. Price quoted a year ago was $36-37 if they (local auto supply chain) could get them! Paid more for the K-Bs but not unhappy. sgw041454@aol.com

Author:	Trouble [ Thu Apr 25, 2002 4:12 pm ]
Post subject:	Re: Pistons
Thanks info I will look into the sealed power stuff. Thanks: Our current build-up used the 198 rod with Quote: : K-B's #KB268 turbo piston (I know you said : no K-B!). Used Hastings moly rings bought : direct (follow K-B's ring gap instructions!) : and the pistons came through Jeg's. This : piston is the higher quality unit sold under : the K-B banner. With a 35cc chamber, : 0.025" deck and 0.045" gasket, we : got about 11:1 comp ratio. Pistons are very : high quality and machined on CNC machines. : : You can also check on Mopar Performance, but be : prepared for sticker shock. TRW/Sealed Power : has dropped many of their pistons, and it is : our opinion that the Silvolite/K-B is a : better product. TRW/Sealed Power has gone : downhill since the big shake-up. cmwolfe@accesscomm.ca

Author:	Doc. [ Thu Apr 25, 2002 4:52 pm ]
Post subject:	Re: 2.2 Pistons Part Numbers
Quote: : Hi all, I am preparing to rebuild a 225 /6 : engine and was looking for some current part : numbers. : I have 198 rods already and was disappointed : that all the trw/speedpro catalogues I found : did not give any piston specs. I hope : someone can provide a 2.2 l piston part no. : that is still currrent as mine are out date. : PS: I am shooting for 10.8 compression and : something other than Keith Black. : Thanks in advance for your help! : Collin The Stroking article has some info. and 2.2 piston p/n's listed towards the end. <A HREF="http://www.slantsix.org/articles/stroking/stroking.htm">http://www.slantsix.org/articles/stroking/stroking.htm</A> At last check, Federal Mogel (old TRW) still had some remaining stock on the std. size 2.2 forged piston. (3.445) DD

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Author:	Tom Gilsdorf [ Thu Apr 25, 2002 6:20 pm ]
Post subject:	Re: Pistons
Quote: : Our current build-up used the 198 rod with : K-B's #KB268 turbo piston (I know you said : no K-B!). Used Hastings moly rings bought : OK, I'll bite. We have the same KB pistons ready to go into our shortblock. What's the deal with KB? Am I missing something here? Gilly tlg225ccr@aol.com

Author:	dschumers [ Thu Apr 25, 2002 9:06 pm ]
Post subject:	Re: Pistons
I have K-B's in my motor. It got about 15,000 miles and 450 passes put on it last year with no problems. K-B's have kind of gained a bad reputation for breaking the top ring land. This seems to be from gapping the top ring too tight. Open the top ring gap some (I think it even says to in the instructions) and they are fine. Dennis slantzilla@excite.com

Author:	Trouble [ Thu Apr 25, 2002 9:11 pm ]
Post subject:	Re: Pistons
Quote: :Actually that is exactly what happened to a half dozen circle track racers I know and some even had piston failure (breakage). I was just being cautious but maybe I should give the kb's a second look see. I have K-B's in my motor. It got about 15,000 : miles and 450 passes put on it last year : with no problems. K-B's have kind of gained : a bad reputation for breaking the top ring : land. This seems to be from gapping the top : ring too tight. Open the top ring gap some : (I think it even says to in the : instructions) and they are fine. Dennis cmwolfe@accesscomm.ca

Author:	Doc. [ Fri Apr 26, 2002 9:41 am ]
Post subject:	Re: Piston top ring gap setting
Quote: : I have K-B's in my motor. It got about 15,000 : miles and 450 passes put on it last year : with no problems. K-B's have kind of gained : a bad reputation for breaking the top ring : land. This seems to be from gapping the top : ring too tight. Open the top ring gap some : (I think it even says to in the : instructions) and they are fine. Dennis Dennis, Where are your top ring gaps set? (this would be good info.) I set up a KB hypereutecnic (sp?) 2.2 / 198 rod SL6 with 12 to 1 compression a while back. I set the top ring gap at .018 and it broke a ring land. Upon disassembly the top rings were showing uneven ware so I would say they were butting. This engine is on it's way back together, this time with TRW forged pistons and more ring gap. DD

Author:	dschumers [ Fri Apr 26, 2002 3:14 pm ]
Post subject:	Re: Piston top ring gap setting
Doug, if memory serves me correctly, they are at .022". Was that 12-1 motor with the 2.2 flat tops? Those are now $20 each from MP. Dennis slantzilla@excite.com

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