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need a piston part # guru #185222 01/05/09 11:18 PM 01/05/09 11:18 PM
Joined: Feb 2008 Posts: 26 prescottvalley,az W wino OP member
wino OP member W Joined: Feb 2008 Posts: 26 prescottvalley,az	I have a 75' 440 that has been bored to .030 over. I also have a new set of cast pistons,flat topp's no valve relives cut in them. they sit at.018 below the deck at t.d.c. the p/n stamped on top say 2286p .030 I bought these some time back with none of the packing/ boxing etc. can anyone cross thease pistons like brand,or details such as compression hight etc. I would like to use them in my 440 since I have them allready have them....please need adice. wino!

Re: need a piston part # guru [Re: wino] #185223 01/05/09 11:32 PM 01/05/09 11:32 PM
Joined: Jan 2003 Posts: 9,826 las vegas 70AARcuda master
70AARcuda master Joined: Jan 2003 Posts: 9,826 las vegas	it is a sealed power piston.. on nhra list of stock pistons.. says 1.94 for compression height. Last edited by 70AARcuda; 01/05/09 11:38 PM. Tony 70 AARCuda Vitamin C 71 Dart Swinger 360 10.318 @ 128.22(10-04-14 Bakersfield) 71 Demon 360 10.666 @122.41 (01-29-17 @ Las Vegas) 71 Duster 408 (10.29 @ 127.86 3/16/19 Las Vegas)

Re: need a piston part # guru [Re: 70AARcuda] #185224 01/05/09 11:48 PM 01/05/09 11:48 PM
Joined: Feb 2008 Posts: 26 prescottvalley,az W wino OP member
wino OP member W Joined: Feb 2008 Posts: 26 prescottvalley,az	Thank you 70aar!

Re: need a piston part # guru [Re: wino] #185225 01/06/09 07:23 PM 01/06/09 07:23 PM
Joined: Jan 2003 Posts: 25,858 Rio Linda, CA John_Kunkel Too Many Posts
John_Kunkel Too Many Posts Joined: Jan 2003 Posts: 25,858 Rio Linda, CA	Something's wrong, with a piston compression height of 1.94" the piston should be down in the hole at least .140". Could the .018" be .180"? (decimal point) The INTERNET, the MISinformation superhighway

Re: need a piston part # guru [Re: John_Kunkel] #185226 01/06/09 11:14 PM 01/06/09 11:14 PM
Joined: Feb 2008 Posts: 26 prescottvalley,az W wino OP member
wino OP member W Joined: Feb 2008 Posts: 26 prescottvalley,az	The method I used was to put a straight edge across the cylinder resting on the block deck and used a feeler gage to check the piston at t.d.c. feeler gauge was .018 the piston comes up to almost flush to the deck minus a gap from a feeler gauge of .018 is this correct?

Re: need a piston part # guru [Re: wino] #185227 01/06/09 11:52 PM 01/06/09 11:52 PM
Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska	A straight edge & feeler gauges will get you VERY close. 3.75 stroke(divided by 2)is 1.875". An RB rod is 6.768" & your CH of 1.94 gives 10.583 would be .142" in the hole with an advertized (RB)deck height of ~10.725". Whats been altered here. live every 24 hour block of time like it's your last day on earth

Re: need a piston part # guru [Re: RapidRobert] #185228 01/07/09 12:02 AM 01/07/09 12:02 AM
Joined: Feb 2008 Posts: 26 prescottvalley,az W wino OP member
wino OP member W Joined: Feb 2008 Posts: 26 prescottvalley,az	so if i undestand corrcetly this bock has been decked quite abit. will this piston / block combo work on a uluminum headed eng. be ok?

Re: need a piston part # guru [Re: wino] #185229 01/07/09 12:05 AM 01/07/09 12:05 AM
Joined: Jan 2003 Posts: 9,826 las vegas 70AARcuda master
70AARcuda master Joined: Jan 2003 Posts: 9,826 las vegas	maybe the compression height is wrong. it is in a list of acceptable pistons...and all say 1.94 compression height... Tony 70 AARCuda Vitamin C 71 Dart Swinger 360 10.318 @ 128.22(10-04-14 Bakersfield) 71 Demon 360 10.666 @122.41 (01-29-17 @ Las Vegas) 71 Duster 408 (10.29 @ 127.86 3/16/19 Las Vegas)

Re: need a piston part # guru [Re: 70AARcuda] #185230 01/07/09 12:37 AM 01/07/09 12:37 AM
Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska	It would appear to be though thats an ungodly amt to have been milled from a deck. The stroke & rod length doesn't vary too much & if that is the actual CH of those pistons then there's nothing else. Yes with .018" in the hole & the right gasket you can end up with excellent quench for your aluminum heads but stay on top of what your CR will end up being & enough valve/piston clearance. live every 24 hour block of time like it's your last day on earth

Re: need a piston part # guru [Re: RapidRobert] #185231 01/07/09 02:45 AM 01/07/09 02:45 AM
Joined: Jan 2003 Posts: 9,826 las vegas 70AARcuda master
70AARcuda master Joined: Jan 2003 Posts: 9,826 las vegas	here is a copy of the excel file from nhra..scroll down to find the 440 list.. google does not bring up anything on sealed power 2286p. need to find someone with an old sealed power catalong... 4929368-CopyofChrysler.xls (138 downloads) Tony 70 AARCuda Vitamin C 71 Dart Swinger 360 10.318 @ 128.22(10-04-14 Bakersfield) 71 Demon 360 10.666 @122.41 (01-29-17 @ Las Vegas) 71 Duster 408 (10.29 @ 127.86 3/16/19 Las Vegas)

Re: need a piston part # guru [Re: 70AARcuda] #2287396 04/14/17 12:26 AM 04/14/17 12:26 AM
Joined: May 2008 Posts: 171 Las Vegas, NV C chargerbr549 member
chargerbr549 member C Joined: May 2008 Posts: 171 Las Vegas, NV	n Last edited by chargerbr549; 04/14/17 02:50 AM.

Re: need a piston part # guru [Re: 70AARcuda] #2287739 04/14/17 04:28 PM 04/14/17 04:28 PM
Joined: Feb 2005 Posts: 4,316 Prospect, PA BSB67 master
BSB67 master Joined: Feb 2005 Posts: 4,316 Prospect, PA	The L2286P is the original forged NHRA replacement piston for the 68-69 440. It has a 2.034" CD Same piston? I don't know. You still need to cut the deck a bit to get a 0.018". Probably a 0.030" to 0.040" cut.

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