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Can some ID this piston please? #1074437 09/13/11 04:16 PM 09/13/11 04:16 PM
Joined: Jan 2003 Posts: 4,288 Danville, NH M Mopar_Mike OP master
Mopar_Mike OP master M Joined: Jan 2003 Posts: 4,288 Danville, NH	Told it was for a 440.. I see its .040 over, it is an aluminum piston. Says SQ on the top, inside says U.S.A 1650 and 350P I want to know what compression etc. Thanks! 6824727-piston.JPG (94 downloads) RS23L7 4-Speed

Re: Can some ID this piston please? [Re: Mopar_Mike] #1074438 09/13/11 05:18 PM 09/13/11 05:18 PM
Joined: Jan 2004 Posts: 27,347 Today? Who Knows? 1_WILD_RT Management Trainee
1_WILD_RT Management Trainee Joined: Jan 2004 Posts: 27,347 Today? Who Knows?	It's a flat top, measure the compression height & it'll be pretty easy to figure it out..... "The Armies of our ancestors were lucky, in that they were not trailed by a second army of pencil pushers."

Re: Can some ID this piston please? [Re: 1_WILD_RT] #1074439 09/13/11 05:22 PM 09/13/11 05:22 PM
Joined: Jan 2003 Posts: 75,126 A Banana Republic near you. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 75,126 A Banana Republic near you.	Quote: It's a flat top, measure the compression height & it'll be pretty easy to figure it out..... , more than likely a low compression ash tray , you have a set of 8 to give out as Xmas gifts to your motorhead friends ...

Re: Can some ID this piston please? [Re: 1_WILD_RT] #1074440 09/13/11 05:24 PM 09/13/11 05:24 PM
Joined: Dec 2006 Posts: 235 Tucson AZ. RADAMX enthusiast
RADAMX enthusiast Joined: Dec 2006 Posts: 235 Tucson AZ.	found this I think it is a speedpro 440 350P E424K 66-71 30,40,60 9.4-1 compression, Flat top no valve reliefs, can be used in 1972 thru 1979 440 if you want more compression than those engines had stock from the factory, ch=1.990"

Re: Can some ID this piston please? [Re: RADAMX] #1074441 09/13/11 05:27 PM 09/13/11 05:27 PM
Joined: Jan 2004 Posts: 27,347 Today? Who Knows? 1_WILD_RT Management Trainee
1_WILD_RT Management Trainee Joined: Jan 2004 Posts: 27,347 Today? Who Knows?	Quote: found this I think it is a speedpro 440 350P E424K 66-71 30,40,60 9.4-1 compression, Flat top no valve reliefs, can be used in 1972 thru 1979 440 if you want more compression than those engines had stock from the factory, ch=1.990" CH of 1.99 & an Advertised compression ratio of 9.4... but a true compression ratio closer to 8.0-1 "The Armies of our ancestors were lucky, in that they were not trailed by a second army of pencil pushers."

Re: Can some ID this piston please? [Re: 1_WILD_RT] #1074442 09/13/11 06:37 PM 09/13/11 06:37 PM
Joined: Jan 2003 Posts: 26,039 Rio Linda, CA John_Kunkel Too Many Posts
John_Kunkel Too Many Posts Joined: Jan 2003 Posts: 26,039 Rio Linda, CA	1.991" is the CH of the original '67 or '70-'71 HP piston, with 90 cc chambers and a .020" gasket it would have a true CR of about 8.8-1 The INTERNET, the MISinformation superhighway

Re: Can some ID this piston please? [Re: John_Kunkel] #1074443 09/13/11 07:58 PM 09/13/11 07:58 PM
Joined: Nov 2003 Posts: 6,293 Rock Springs Bob_Coomer master
Bob_Coomer master Joined: Nov 2003 Posts: 6,293 Rock Springs	Looks like a sealed power or a Federal Mogul.. Speed Pro is the same company... [color:"red"]65 Hemi Belvedere coming soon [/color] [color:"#00FF00"]557" Indy engine 1.07 60ft 144mph in the 8th 2100 lbs package [/color]

Re: Can some ID this piston please? [Re: 1_WILD_RT] #1074444 09/13/11 09:24 PM 09/13/11 09:24 PM
Joined: Jan 2003 Posts: 4,288 Danville, NH M Mopar_Mike OP master
Mopar_Mike OP master M Joined: Jan 2003 Posts: 4,288 Danville, NH	Thanks all. I agree this is the optional higher CR piston. I ended up finding the same link as you 1_Wild_RT.. Thanks. RS23L7 4-Speed

Re: Can some ID this piston please? [Re: Mopar_Mike] #1074445 09/14/11 09:50 AM 09/14/11 09:50 AM
Joined: Jan 2003 Posts: 13,417 Marion, South Carolina [><] an8sec70cuda I Live Here
an8sec70cuda I Live Here Joined: Jan 2003 Posts: 13,417 Marion, South Carolina [><]	Looks like the speedpro/federal mogul/etc L2266 piston. It doesn't give anywhere near the advertised compression ratio. My first 440 had a set of them in it. I swapped them out for some ROSS flattops...big difference. CHIP '70 hemicuda, 575" Hemi, 727, Dana 60 '69 road runner, 440-6, 18 spline 4 speed, Dana 60 '71 Demon, 340, low gear 904, 8.75 '73 Chrysler New Yorker, 440, 727, 8.75 '90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt '06 GMC 2500HD LBZ Duramax

Re: Can some ID this piston please? [Re: Mopar_Mike] #1074446 09/14/11 10:00 AM 09/14/11 10:00 AM
Joined: Jan 2003 Posts: 75,126 A Banana Republic near you. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 75,126 A Banana Republic near you.	Quote: Thanks all. I agree this is the optional higher CR piston. I ended up finding the same link as you 1_Wild_RT.. Thanks. Optional HIGHER compression ratio ??

Re: Can some ID this piston please? [Re: JohnRR] #1074447 09/14/11 10:31 AM 09/14/11 10:31 AM
Joined: Jan 2003 Posts: 4,288 Danville, NH M Mopar_Mike OP master
Mopar_Mike OP master M Joined: Jan 2003 Posts: 4,288 Danville, NH	Quote: Quote: Thanks all. I agree this is the optional higher CR piston. I ended up finding the same link as you 1_Wild_RT.. Thanks. Optional HIGHER compression ratio ?? John, go to this link, you will see the two different pistons offered.. http://www.campbellenterprises.com/mopar_sealed_power_cast_pistons.htm RS23L7 4-Speed

Re: Can some ID this piston please? [Re: Mopar_Mike] #1074448 09/14/11 11:36 AM 09/14/11 11:36 AM
Joined: Jan 2003 Posts: 13,417 Marion, South Carolina [><] an8sec70cuda I Live Here
an8sec70cuda I Live Here Joined: Jan 2003 Posts: 13,417 Marion, South Carolina [><]	I may be wrong, but I believe the only FM/Speed Pro/Sealed Power forged piston that gives a decent compression ratio is the L2355 "six pack" piston. It has 4 valve reliefs. CHIP '70 hemicuda, 575" Hemi, 727, Dana 60 '69 road runner, 440-6, 18 spline 4 speed, Dana 60 '71 Demon, 340, low gear 904, 8.75 '73 Chrysler New Yorker, 440, 727, 8.75 '90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt '06 GMC 2500HD LBZ Duramax

Re: Can some ID this piston please? [Re: an8sec70cuda] #1074449 09/14/11 12:26 PM 09/14/11 12:26 PM
Joined: Jan 2004 Posts: 27,347 Today? Who Knows? 1_WILD_RT Management Trainee
1_WILD_RT Management Trainee Joined: Jan 2004 Posts: 27,347 Today? Who Knows?	Quote: I may be wrong, but I believe the only FM/Speed Pro/Sealed Power forged piston that gives a decent compression ratio is the L2355 "six pack" piston. It has 4 valve reliefs. Yup... Don't know how I got singled out above, I'm certain it's a low compression pig piston... "The Armies of our ancestors were lucky, in that they were not trailed by a second army of pencil pushers."

Re: Can some ID this piston please? [Re: Mopar_Mike] #1074450 09/14/11 04:37 PM 09/14/11 04:37 PM
Joined: Jan 2003 Posts: 75,126 A Banana Republic near you. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 75,126 A Banana Republic near you.	Quote: Quote: Quote: Thanks all. I agree this is the optional higher CR piston. I ended up finding the same link as you 1_Wild_RT.. Thanks. Optional HIGHER compression ratio ?? John, go to this link, you will see the two different pistons offered.. http://www.campbellenterprises.com/mopar_sealed_power_cast_pistons.htm What that says and what is real are 2 different things, to get close to the 9.4 that link claims you would have to have a head that's no bigger than an 80 cc chamber, that piston is roughly .090 in the hole.

Re: Can some ID this piston please? [Re: 1_WILD_RT] #1074451 09/14/11 04:46 PM 09/14/11 04:46 PM
Joined: Jan 2003 Posts: 26,039 Rio Linda, CA John_Kunkel Too Many Posts
John_Kunkel Too Many Posts Joined: Jan 2003 Posts: 26,039 Rio Linda, CA	The 1.991" piston in question was first used in the '67 440 with closed chamber heads and it was advertised as being 10.1 The piston was resurrected for use in the lower compression '70-'71 440 with open chambers and was advertised at 9.7 unlike the "low compression pig" that followed in '72. In those years the standard 440 and the HP 440-4 used the same piston. The INTERNET, the MISinformation superhighway

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