Available Pistons FAQ

[John]

Updated list; see last post-- SilverXJ
Pistons

Edited 6/03/08 to reflect changes to the H825/H802 and 677p/cp information as furnished by Sealed power tech dept. Thanks gradon for passing the info along.

Pistons

Piston Stock - '87-06 4.0L, 1.601 pin ht, 13.5cc
Piston 2229c - Silvolite, 1.581 pin ht, 11.5cc
Piston 3241HC - Silvolite, 1.592 pin ht, 14.1cc **
Piston H802CP - Sealed Power, 1.592 pin ht, 15.5cc
Piston H825CP - Sealed Power, 1.592 pin ht, 15.5cc
piston 677p/CP - Sealed Power, 1.585 pin ht, 14.0cc

All the above pistons are dish top, with Press fit Wrist pins of .931"dia.
Pistons are available 3.875 std,.020,.030,.040,.060 oversize.

H802/H825 have a D shaped cup, recessed head .116 inch deep.

677p/cp dish depth .116

H802 rings 1.5 1.5 4mm

H825 rings, 5/64 5/64 3/16"

3241HC has a D shaped dish that has been machined to a full round dish of 18cc
without depth change.Rings 1.5 1.5 4mm

STL-677 has a D shaped cup, recessed head .116 inch deep.
Rings, 5/64 5/64 3/16" one of the largest stock dish cc Can be enlarged

Silvolite 2229 has a thick top and is a favorite for machining larger dishes.
24cc is possible with this one..
2229's ok to .19" dish minimum thickness at KB technical Department. <---(updated 6/12/08)

**Same as Engine Tech p3071

Manufactures will tell you to avoid reducing crown thickness below 0.300" thickness.

If you decide to use the long 4.0 rods casting no. 53020126, custom forged
pistons with a pin height of 1.380" are needed to produce zero deck clearance.


More to come
John

[Flash]

Unfortunately i cant transfer the pic that are "attachments"
But will figure it out and add then in time.

I will give you some info for the site. (not trying to hijack!)

Diamond pistons 24cc dish .040 MLS head gasket with .045 quench 9.4scr 8.0dcr

[Muad'Dib]

KB944 (KB-Silvolite) Information:

http://kb-silvolite.com/forged.php?acti ... s&P_id=543

[Cheromaniac]

Stock 4.0 cast aluminium '87-'93 #83500251, '94-'95 #4773157, '96-'06 #4798329----1.601" 13.1cc
Keith-Black Silvolite (UEM) cast aluminium 2228/2228c----1.581" 11.5cc
Keith-Black Silvolite (UEM) cast aluminium 2229/2229c----1.581" 11.0cc
Keith-Black Silvolite (UEM) hypereutectic 3238hc/3243hc, 3241hc/3242hc----1.592" 13.7cc
Sealed Power (Sterling) hypereutectic H802CP/H825CP----1.592" 15.1cc
Sealed Power (Sterling) cast aluminium 677P/677CP----1.585" 17.5cc
Sealed Power (Sterling) cast aluminium 525P/525CP----1.580" 17.5cc
Keith-Black Silvolite (UEM) forged stroker 944----1.353" 21.7cc NEW
Keith-Black Silvolite (UEM) forged stroker 945----1.353" 11.4cc NEW

[SilverXJ]

Silvolite 2229: cast aluminum; standard rings; bare skirt; 11cc dish; .100" deep dish; 1.581" compression height
Silvolite 2229C: cast aluminum; standard rings; coated skirt; 11cc dish; .100" deep dish;1.581" compression height
Silvolite 3241HC: hypereutectic; metric rings; coated skirt; 13cc dish; .116" deep dish; 1.592" compression height
Silvolite 3242HC: hypereutectic; standard rings; coated skirt; 13cc dish; .116" deep dish; 1.592" compression height

Keith-Black Icon stroker IC944: forged 4032 aluminum; standard rings; bare skirt; 21.7cc dish; 1.353" compression height
Keith-Black Icon stroker IC945: forged 4032 aluminum; standard rings; bare skirt; 10.38cc dish; 1.353" compression height

Sealed Power H802CP: hypereutectic; metric rings; coated skirt; 13.4cc dish; .116" deep dish; 1.592" compression height
Sealed Power H825CP: hypereutectic; standard rings; coated skirt; 13.4cc dish; .116" deep dish; 1.592" compression height
Sealed Power 677P: cast aluminum; standard rings; bare skirt; 13.4cc dish; .116" deep dish; 1.585" compression height
Sealed Power 677CP: cast aluminum; standard rings; coated skirt; 13.4cc dish; .116" deep dish; 1.585" compression height

Specifications per Keith Black and Sealed Power