Piston/Rod Help- 572 Hemi
#2473289
03/28/18 01:10 PM
03/28/18 01:10 PM
|
Joined: Dec 2004
Posts: 1,548 DC, MD Suburbs
440PURSUIT
OP
pro stock
|
OP
pro stock
Joined: Dec 2004
Posts: 1,548
DC, MD Suburbs
|
I have a 4.5 Block with a 4.5 Crank.
What Rod Length and Compression Height should I use to get Pump Gas Compression with Aluminum MP heads.
Thanks
1969 Hemi Charger R/T, 1970 Charger 472 Hemi 6 Sp 1969 Charger Pro Tour Project 1971 Barracuda Convert 1970 440 6pack Superbird, 1968 Fury I Police Pursuit 440 Super Commando 2 door sedan (Black/Blue) 1967 Barracuda Convert 1968 Barracuda Coupe 1972 Charger w 383 1972 Sebring Plus 440-6 Clone 1969 Coronet Pro Street 2009 Challengeer SRT8 stick 1992-1986 Body 2500 4x4 440 stick 1982 Ramcharger 318 Sniper- getting enhanced. 1997 Ram B3500 Van 5.9 1991.5 W250 Cummins- Big Chief
|
|
|
Re: Piston/Rod Help- 572 Hemi
[Re: 440PURSUIT]
#2473307
03/28/18 01:58 PM
03/28/18 01:58 PM
|
Joined: Jan 2012
Posts: 2,645 Stuttgart, Arkansas
rickseeman
master
|
master
Joined: Jan 2012
Posts: 2,645
Stuttgart, Arkansas
|
Most everybody uses a 7.1"/.990 pin rod for that. Hopefully your crank is 2.20 pins. Make sure of the width. It's easier to find rods if your crank pins are Chevy width. Compression height doesn't tell you everything on a Hemi because of the dome. Just call Ray Barton and tell him what you have and he will get you pistons. I have a beautiful set in my shop. I can get you the number if you need it.
2011 Drag Pak Challenger
|
|
|
Re: Piston/Rod Help- 572 Hemi
[Re: 440PURSUIT]
#2473313
03/28/18 02:10 PM
03/28/18 02:10 PM
|
Joined: Aug 2003
Posts: 43,157 Bend,OR USA
Cab_Burge
I Win
|
I Win
Joined: Aug 2003
Posts: 43,157
Bend,OR USA
|
I have a new World 4.500 bore block that I'm building a 572 C.I.pump gas motor for a local customer with FHO CNC ported Stage V street heads, I used a set different set of rods(Manley SS I beam rods) and had Diamond make the pistons. This motor ended up with 11.04 to 1 compression ratio due to me thinking those heads would be 175.0 CC, they aren't Their 169.8 CC They can make what ever piston compression ratio you want or need as long as you know the stroke, bore size you want, head CC size, rod length and wrist pin size Most of the other decent piston companies will do that also for you
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
|
|
|
Re: Piston/Rod Help- 572 Hemi
[Re: rickseeman]
#2473316
03/28/18 02:15 PM
03/28/18 02:15 PM
|
Joined: Jan 2012
Posts: 2,645 Stuttgart, Arkansas
rickseeman
master
|
master
Joined: Jan 2012
Posts: 2,645
Stuttgart, Arkansas
|
Look at that weight. Nice. And the pin doesn't go into the oil ring. Nice. Gas ported. Thin rings. (But I wouldn't be afraid to go thinner.) Modern pistons like these are one of the reasons why Hemi's make 800 HP today instead of 425. Life is good.
2011 Drag Pak Challenger
|
|
|
Re: Piston/Rod Help- 572 Hemi
[Re: 440PURSUIT]
#2473361
03/28/18 03:34 PM
03/28/18 03:34 PM
|
Joined: Jan 2003
Posts: 13,362 Marion, South Carolina [><]
an8sec70cuda
I Live Here
|
I Live Here
Joined: Jan 2003
Posts: 13,362
Marion, South Carolina [><]
|
Mine uses 7.00" BBC rods. Custom Diamond pistons spec'd for big nitrous. It is around 11:1 w/ MP aluminum heads. The folder w/ all the info on it is at home...I can get you my measurements tomorrow.
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: Piston/Rod Help- 572 Hemi
[Re: 440PURSUIT]
#2473372
03/28/18 04:03 PM
03/28/18 04:03 PM
|
Joined: Jan 2004
Posts: 4,566 Motor City
6PKRTSE
master
|
master
Joined: Jan 2004
Posts: 4,566
Motor City
|
I am not worthy. Mine is only a 528" Hemi.
Custom (Nitrous) 10.5:1 Compression (pump gas, street car) 1/16, 1/16, 3/16, didn't go hi-tech on ring pack due to street driven Mopar Heads, 10.5:1 Compression, 2.250"/1.900" Valves 4.503" Bore 4.150" Stroke 7.100" BBC Rods CH 1.370" (I think) I would have to look at my build sheets again also.
1963 Belvedere 440 Max Wedge Tribute 1970 Charger R/T S.E. 440 Six Pack 1970 Challenger R/T, 528 Hemi 1970 Charger 500 S.E. 440 4 BBL 1970 Plymouth Road Runner 383 1974 Chrysler New Yorker 440 1996 2500 RAM 488 V-10 4X4 2004 3500 Dually Cummins 4x4 2012 Challenger R/T Classic.
|
|
|
Re: Piston/Rod Help- 572 Hemi
[Re: 440PURSUIT]
#2473418
03/28/18 05:44 PM
03/28/18 05:44 PM
|
Joined: Jan 2004
Posts: 4,566 Motor City
6PKRTSE
master
|
master
Joined: Jan 2004
Posts: 4,566
Motor City
|
I missed that part on mine. My pistons are JE's. Nothing wrong with JE, ICON, Diamond or Gibtec's.
1963 Belvedere 440 Max Wedge Tribute 1970 Charger R/T S.E. 440 Six Pack 1970 Challenger R/T, 528 Hemi 1970 Charger 500 S.E. 440 4 BBL 1970 Plymouth Road Runner 383 1974 Chrysler New Yorker 440 1996 2500 RAM 488 V-10 4X4 2004 3500 Dually Cummins 4x4 2012 Challenger R/T Classic.
|
|
|
Re: Piston/Rod Help- 572 Hemi
[Re: 440PURSUIT]
#2473539
03/28/18 09:08 PM
03/28/18 09:08 PM
|
Joined: Mar 2006
Posts: 2,675 Mt. Eden Ky.
Hemi Allstate
master
|
master
Joined: Mar 2006
Posts: 2,675
Mt. Eden Ky.
|
I am using 7.100" rods with CP pistons . 1.37 compression height .064 , .064, .218 ring pack. Pistons weight 703 grams. 572"
Mark
1996 Ram 1500 Sport 1968 road runner 1952 Sears Allstate licensed, pump gas, Hemi 5.98 @ 115.73 1.33 60 ft. The best is yet to come. Painless Performance / Street RODDER magazine Top 100 for 2019
|
|
|
Re: Piston/Rod Help- 572 Hemi
[Re: an8sec70cuda]
#2475911
04/02/18 10:52 AM
04/02/18 10:52 AM
|
Joined: Jan 2003
Posts: 13,362 Marion, South Carolina [><]
an8sec70cuda
I Live Here
|
I Live Here
Joined: Jan 2003
Posts: 13,362
Marion, South Carolina [><]
|
Mine uses 7.00" BBC rods. Custom Diamond pistons spec'd for big nitrous. It is around 11:1 w/ MP aluminum heads. The folder w/ all the info on it is at home...I can get you my measurements tomorrow. A lil late, but as promised...
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: Piston/Rod Help- 572 Hemi
[Re: 440PURSUIT]
#2576925
11/10/18 10:19 PM
11/10/18 10:19 PM
|
Joined: Jan 2003
Posts: 17,844 S.E. Michigan
ZIPPY
I Live Here
|
I Live Here
Joined: Jan 2003
Posts: 17,844
S.E. Michigan
|
Much as it's never been in style to say anything nice about Indy, Diamond makes a stocking/shelf piston for them that looks pretty nice with a 7.100 rod. It does use support rails for the oil ring pack.
It uses a 990 pin, has 1.35 compression height, weighs 695 grams and uses standard 1/16-1/16-3/16 rings. There aren't any tricks in them, just a relatively short compression height. Has a 73.9 cc dome per specs, I have not CC'd yet. 804IN is the package number.
Rich H.
Esse Quam Videri
|
|
|
Re: Piston/Rod Help- 572 Hemi
[Re: 440PURSUIT]
#2577050
11/11/18 10:57 AM
11/11/18 10:57 AM
|
Joined: Feb 2006
Posts: 1,051 The Great White North
RAMM
super stock
|
super stock
Joined: Feb 2006
Posts: 1,051
The Great White North
|
OP you can't go wrong with any piston MFG that has been mentioned, however , after touring JE pistons facility this year at EMC and using 2 sets of them recently I doubt anyone else can meet their quality vs price. My vote is to call Ron Beaubien @ Diamond or Jim Irwin @ JE and tell them what you want. Either will deliver. J.Rob
2009 PHR\EMC Competitor 2010 PHR\EMC Competitor 2011 PHR\EMC Competitor 2012 PHR\EMC Competitor 2013 PHR\EMC Competitor 2014 HotRod/EMC Competitor 2015 HotRod/EMC NoShow 2016 HotRod/EMC 3rd place SPEC Bigblock 2018 HotRod/EMC 7th place G3
|
|
|
Re: Piston/Rod Help- 572 Hemi
[Re: 440PURSUIT]
#2577527
11/12/18 04:15 PM
11/12/18 04:15 PM
|
Joined: Jan 2012
Posts: 2,645 Stuttgart, Arkansas
rickseeman
master
|
master
Joined: Jan 2012
Posts: 2,645
Stuttgart, Arkansas
|
I have a 4.5 Block with a 4.5 Crank.
What Rod Length and Compression Height should I use to get Pump Gas Compression with Aluminum MP heads.
Thanks
Mine are listed as 1.34"
2011 Drag Pak Challenger
|
|
|
Re: Piston/Rod Help- 572 Hemi
[Re: 440PURSUIT]
#2578628
11/15/18 02:40 AM
11/15/18 02:40 AM
|
Joined: Jan 2011
Posts: 4,785 Utah and Alaska
astjp2
master
|
master
Joined: Jan 2011
Posts: 4,785
Utah and Alaska
|
I bought a set of NOS $250 mopar performance weisco slugs and got the K1 6.86 rods and K1 4.5 stroke crank with standard Hemi Journals...Had less that $1600 into the complete rotating assembly including balancer and 130 tooth flywheel. Tim
1941 Taylorcraft 1968 Charger 1994 Wrangler 1998 Wrangler 2008 Kia Rio 2017 Jetta
I didn't do 4 years and 9 months of Graduate School to be called Mister!
|
|
|
|
|