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4.080" pistons... where? #545178
12/04/09 06:17 PM
12/04/09 06:17 PM
Joined: Dec 2008
Posts: 127
Phoenix, Arizona
HerboldRacing Offline OP
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Phoenix, Arizona
I'm trying to find pistons for my 340/418 stroker build. It needs to run on premium pump gas - using eddy performer rpm heads (65cc chambers). So far I could only find 2, a dished one from KB and a flat top one also from KB. I would love to run some coated hyper pistons... but can't find any! :-\

Thanks for any help...


Marvin Herbold 1973 Plymouth Duster 340 Drag Car Blog - http://www.HerboldRacing.com Videos - http://www.YouTube.com/mherbold Pictures - http://gallery.herbold-family.com/main.php?g2_itemId=10331
Re: 4.080" pistons... where? [Re: HerboldRacing] #545179
12/04/09 06:31 PM
12/04/09 06:31 PM
Joined: Dec 2009
Posts: 242
Upland, California
Spode Offline
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Spode  Offline
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Upland, California
Ross, Diamond, JE ?

Re: 4.080" pistons... where? [Re: Spode] #545180
12/04/09 07:00 PM
12/04/09 07:00 PM
Joined: Dec 2008
Posts: 127
Phoenix, Arizona
HerboldRacing Offline OP
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HerboldRacing  Offline OP
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Quote:

Ross, Diamond, JE ?




I don't care who makes them. The only off the shelf 4.080 pistons I could find for my 340 were a couple of KB pistons, one dished and one flat top. Nothing else so far...

I'd love to have dished coated hypereutectic 4.080" pistons for my 340/418. :-\


Marvin Herbold 1973 Plymouth Duster 340 Drag Car Blog - http://www.HerboldRacing.com Videos - http://www.YouTube.com/mherbold Pictures - http://gallery.herbold-family.com/main.php?g2_itemId=10331
Re: 4.080" pistons... where? [Re: HerboldRacing] #545181
12/04/09 09:11 PM
12/04/09 09:11 PM
Joined: Sep 2004
Posts: 122
St. Clair Shores, MI
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JohnM Offline
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St. Clair Shores, MI
Unless something's changed recently, off the shelf 4.08 bore stroker pistons is not going to happen, but most any of the piston mfgrs will make them any size you want, and it's not all that much more $$$ - at least it wasn't when I bought mine.

Re: 4.080" pistons... where? [Re: JohnM] #545182
12/04/09 09:19 PM
12/04/09 09:19 PM
Joined: Jan 2003
Posts: 1,607
Lapeer, MI.
todd440 Offline
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Diamond makes a 4.080 dish for that, with a dish. It'd be about 9.5 to 1 with 65 cc heads. Part number 51413. It's a non-stocking number, so it's made to order, just not stocked on the shelf. Same price as shelf stock items.

Re: 4.080" pistons... where? [Re: HerboldRacing] #545183
12/04/09 09:41 PM
12/04/09 09:41 PM
Joined: Mar 2008
Posts: 5,746
Ontario, Canada
Dodgem Offline
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Since you are racing do yourself a favour and get a diamond custom piston. with aluminum heads and a big cam you can run 11 to 1 or more on 91
252/262 110 lobe center would be a good start??

lots hear for that marv
http://www.diamondracing.net/MoParSection.pdf

Re: 4.080" pistons... where? [Re: Dodgem] #545184
12/04/09 09:58 PM
12/04/09 09:58 PM
Joined: Dec 2008
Posts: 127
Phoenix, Arizona
HerboldRacing Offline OP
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Quote:

Since you are racing do yourself a favour




Hey Dodgem - not racing with this motor - this is for my 65 Dart street car.


Marvin Herbold 1973 Plymouth Duster 340 Drag Car Blog - http://www.HerboldRacing.com Videos - http://www.YouTube.com/mherbold Pictures - http://gallery.herbold-family.com/main.php?g2_itemId=10331
Re: 4.080" pistons... where? [Re: HerboldRacing] #545185
12/04/09 10:35 PM
12/04/09 10:35 PM
Joined: Mar 2008
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Ontario, Canada
Dodgem Offline
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Dam you building two strokers?? What about the leaning tower of power?? With the clifford valve cover!!
Diamond will build you what you want in two weeks out the door or less. that 9.5 to one piston would work good on the street with a mild cam.

You know when I seen eddy I thought didn't he had a couple sets of W5's?? LOL!!
Dodgeboy8

Re: 4.080" pistons... where? [Re: Dodgem] #545186
12/04/09 10:51 PM
12/04/09 10:51 PM
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Las Vegas, NV
dodgeboy11 Offline
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Do yourself a favor and run the forged pistons. They will handle tons more abuse than the hyperucracktic pistons and they're lighter too.

Re: 4.080" pistons... where? [Re: dodgeboy11] #545187
12/04/09 11:48 PM
12/04/09 11:48 PM
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Posts: 683
CENTRAL MINN
1965_PLYMOUTH Offline
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CENTRAL MINN
here's a heads-up. hypereutectic pistons aren't built for street use and won't last. they are made for race only. my

Re: 4.080" pistons... where? [Re: Dodgem] #545188
12/05/09 01:11 AM
12/05/09 01:11 AM
Joined: Dec 2008
Posts: 127
Phoenix, Arizona
HerboldRacing Offline OP
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HerboldRacing  Offline OP
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Phoenix, Arizona
Quote:

Dam you building two strokers?? What about the leaning tower of power?? With the clifford valve cover!!
Diamond will build you what you want in two weeks out the door or less. that 9.5 to one piston would work good on the street with a mild cam.

You know when I seen eddy I thought didn't he had a couple sets of W5's?? LOL!!
Dodgeboy8




Yep yep two strokers - the W5 build is for the Duster and I do have an extra set of virgin W5's that I am going to put up on ebay pretty soon. I'm not sure what I am going to do with the /6 with the clifford stuff yet... probably Ebay that too.

@dodgeboy11 - hyper pistons are lighter than forged. Forged will handle more power but I'm not building a race motor. Hyper will be a win in a street motor because they are lighter - less rotating mass.

@1965 plymouth - a lot of OEMs use hyper pistons. They are fine for street use.


Marvin Herbold 1973 Plymouth Duster 340 Drag Car Blog - http://www.HerboldRacing.com Videos - http://www.YouTube.com/mherbold Pictures - http://gallery.herbold-family.com/main.php?g2_itemId=10331
Re: 4.080" pistons... where? [Re: HerboldRacing] #545189
12/05/09 08:05 AM
12/05/09 08:05 AM
Joined: Jan 2003
Posts: 1,607
Lapeer, MI.
todd440 Offline
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I gave you the wrong part number for that piston. That one has the small block chevy pin size. The mopar pin size number is 51412. They also make a flat top, number 51010, and would yield about 11 to 1. The gas is so bad today, you just can't run that high on the street. Keep in mind, not all detonation is able to heard.

Re: 4.080" pistons... where? [Re: todd440] #545190
12/28/09 03:58 PM
12/28/09 03:58 PM
Joined: Dec 2008
Posts: 127
Phoenix, Arizona
HerboldRacing Offline OP
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Letting you guys know I am going with the Diamond 51412's. Just ordered them from Mancini a few minutes ago - I asked to speak to Wes and he gave me a $35 discount for a set of 8.


Marvin Herbold 1973 Plymouth Duster 340 Drag Car Blog - http://www.HerboldRacing.com Videos - http://www.YouTube.com/mherbold Pictures - http://gallery.herbold-family.com/main.php?g2_itemId=10331
Re: 4.080" pistons... where? [Re: HerboldRacing] #545191
12/28/09 05:43 PM
12/28/09 05:43 PM
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Ontario, Canada
Dodgem Offline
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Wes will always treat you right!

Re: 4.080" pistons... where? [Re: 1965_PLYMOUTH] #545192
12/29/09 09:17 AM
12/29/09 09:17 AM
Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
patrick Offline
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Quote:

here's a heads-up. hypereutectic pistons aren't built for street use and won't last. they are made for race only. my



yeeeoooowwwwkay...except just about every factory engine from the last 15-20 years have had hypereutectic cast pistons....

418 cubes, 65cc heads, .039" thick, 4.14" dia gasket, 0 deck and 23cc dish will net you 9.9:1 comp, 20cc will be 10.2, 15cc will be 10.7.

9.9 with a moderate cam (230@.050), aluminum heads and tight quench will probably run on 87 with a moderate timing curve. if you get real aggressive with spark advance you might have to bump up to 89 on warm days.


1976 Spinnaker White Plymouth Duster, /6 A833OD
1986 Silver/Twilight Blue Chrysler 5th Ave HotRod **SOLD!***
2011 Toxic Orange Dodge Charger R/T
2017 Grand Cherokee Overland
2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)
Re: 4.080" pistons... where? [Re: patrick] #545193
12/29/09 12:42 PM
12/29/09 12:42 PM
Joined: Dec 2008
Posts: 127
Phoenix, Arizona
HerboldRacing Offline OP
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Quote:

418 cubes, 65cc heads, .039" thick, 4.14" dia gasket, 0 deck and 23cc dish will net you 9.9:1 comp, 20cc will be 10.2, 15cc will be 10.7.




It'll be 418 ci, 63cc heads, .035" thick & 4.125" dia gasket, 0 deck, 21.5 cc dish. The CR will be 10.3 to 1... I am probably going to run the 20-230-4 comp cam. Should see about 450 HP at 5500 RPM and 500 tq at 3500 RPM. Agree?


Marvin Herbold 1973 Plymouth Duster 340 Drag Car Blog - http://www.HerboldRacing.com Videos - http://www.YouTube.com/mherbold Pictures - http://gallery.herbold-family.com/main.php?g2_itemId=10331
Re: 4.080" pistons... where? [Re: HerboldRacing] #545194
12/31/09 09:35 AM
12/31/09 09:35 AM
Joined: Mar 2008
Posts: 5,746
Ontario, Canada
Dodgem Offline
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Dodgem  Offline
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You will be happy with those pistons

Hypers are week street pistons and seen lots where a little detonation breaks them toot sweet!

Re: 4.080" pistons... where? [Re: Dodgem] #545195
12/31/09 11:08 AM
12/31/09 11:08 AM
Joined: Dec 2008
Posts: 127
Phoenix, Arizona
HerboldRacing Offline OP
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Phoenix, Arizona
Hey - what piston to wall clearance do these Diamond pistons need?


Marvin Herbold 1973 Plymouth Duster 340 Drag Car Blog - http://www.HerboldRacing.com Videos - http://www.YouTube.com/mherbold Pictures - http://gallery.herbold-family.com/main.php?g2_itemId=10331
Re: 4.080" pistons... where? [Re: HerboldRacing] #545196
12/31/09 03:05 PM
12/31/09 03:05 PM
Joined: Mar 2008
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Ontario, Canada
Dodgem Offline
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It will be in the instruction specs but I know they like .005 on a 440 base??

Re: 4.080" pistons... where? [Re: Dodgem] #545197
12/31/09 03:55 PM
12/31/09 03:55 PM
Joined: Jan 2003
Posts: 1,365
elmira ny
hp340nos Offline
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elmira ny
a pic of my diamond dish ,340, 4" stroke (418cid) ,4.080 bore piston in the block.

5700592-418stroker023.jpg (214 downloads)
Last edited by hp340nos; 12/31/09 03:56 PM.






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