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Pistons for 360 #840087 10/27/10 08:25 AM 10/27/10 08:25 AM
Joined: Jul 2004 Posts: 143 New Brunswick, Canada C CoyoteJack OP member
CoyoteJack OP member C Joined: Jul 2004 Posts: 143 New Brunswick, Canada	I am in the planning stages of building a 5.9 magnum with a 6/71 on top. I was wondering if anybody else had built a 5.9 whether it be blown or turbo'd. If they have, what pistons did you use? I am trying to get down to 8 to 1 compression with Magnum heads. Jack

Re: Pistons for 360 [Re: CoyoteJack] #840088 10/27/10 09:46 AM 10/27/10 09:46 AM
Joined: Feb 2003 Posts: 4,953 Houston, Texas TheOtherDodge master
TheOtherDodge master Joined: Feb 2003 Posts: 4,953 Houston, Texas	Best bet are to run some custom pistons so you can move your rings lower and get any compression height you desire. I run JE.

Re: Pistons for 360 [Re: TheOtherDodge] #840089 10/27/10 12:58 PM 10/27/10 12:58 PM
Joined: Sep 2007 Posts: 468 Dirty Dena, Maryland dodge turbo mopar
dodge turbo mopar Joined: Sep 2007 Posts: 468 Dirty Dena, Maryland	Ross custom here...8:1 comp with a x-head..ceramic coated tops all for around $500 78 Adventurer 150small block turbo'd 360w/Borg S475....smoke'em

Re: Pistons for 360 [Re: dodge turbo] #840090 10/27/10 01:59 PM 10/27/10 01:59 PM
Joined: Jul 2004 Posts: 143 New Brunswick, Canada C CoyoteJack OP member
CoyoteJack OP member C Joined: Jul 2004 Posts: 143 New Brunswick, Canada	Quote: Ross custom here...8:1 comp with a x-head..ceramic coated tops all for around $500 That seems like a pretty good price. Jack

Re: Pistons for 360 [Re: CoyoteJack] #840091 10/27/10 05:54 PM 10/27/10 05:54 PM
Joined: Feb 2003 Posts: 4,953 Houston, Texas TheOtherDodge master
TheOtherDodge master Joined: Feb 2003 Posts: 4,953 Houston, Texas	WOW! $500 for a blower piston with coating? Did you get some sort of special deal? Coating tops for a set of pistons is about $120 + pistons!

Re: Pistons for 360 [Re: TheOtherDodge] #840092 10/27/10 07:32 PM 10/27/10 07:32 PM
Joined: Jan 2005 Posts: 3,635 Oakland, MI D dizuster master
dizuster master D Joined: Jan 2005 Posts: 3,635 Oakland, MI	I was thinking the same thing. Probably more like $1000+ for something like that. I can tell you to get to 8:1 on a 5.9 with iron heads is going to take a custom piston though. I'm in the middle of doing a 360 with open chamber '308 heads, and I couldn't get the compression to 8:1 with an off the shelf piston. The closest thing I could get was a Probe SRS series piston. 14.5cc dish, but even with that you'd need a crazy thick head gasket to get to 8:1

Re: Pistons for 360 [Re: dizuster] #840093 10/28/10 07:50 AM 10/28/10 07:50 AM
Joined: Jul 2004 Posts: 143 New Brunswick, Canada C CoyoteJack OP member
CoyoteJack OP member C Joined: Jul 2004 Posts: 143 New Brunswick, Canada	Quote: I was thinking the same thing. Probably more like $1000+ for something like that. I can tell you to get to 8:1 on a 5.9 with iron heads is going to take a custom piston though. I'm in the middle of doing a 360 with open chamber '308 heads, and I couldn't get the compression to 8:1 with an off the shelf piston. The closest thing I could get was a Probe SRS series piston. 14.5cc dish, but even with that you'd need a crazy thick head gasket to get to 8:1 That's exactly what I am finding. A friend thought of going with a chevy piston and getting my rods bushed to the chevy pin size, but up here the machinist's want a small fortune. Jack

Re: Pistons for 360 [Re: CoyoteJack] #840094 10/28/10 09:51 AM 10/28/10 09:51 AM
Joined: Feb 2003 Posts: 4,953 Houston, Texas TheOtherDodge master
TheOtherDodge master Joined: Feb 2003 Posts: 4,953 Houston, Texas	My custom JE pistons were $950, + rings. Since custom, I put the ring pack low, 9.3:1 compression with my heads, .927 pin. I bought 6.200 rods with 2.200 journals.

Re: Pistons for 360 [Re: CoyoteJack] #840095 10/28/10 10:03 AM 10/28/10 10:03 AM
Joined: Mar 2006 Posts: 9,841 MI, usa dvw master
dvw master Joined: Mar 2006 Posts: 9,841 MI, usa	I have a 340. 7.9-1 with a 6.25 rod. Venolia pistons were $500 in 1991. Doug

Re: Pistons for 360 [Re: dvw] #840096 10/29/10 01:32 PM 10/29/10 01:32 PM
Joined: Jan 2005 Posts: 3,635 Oakland, MI D dizuster master
dizuster master D Joined: Jan 2005 Posts: 3,635 Oakland, MI	Depending on the cam, the chevy pistons might not work anyway. Valves are in a different location/different angle... How much boost are you going to try to run with this thing? I mean you can always get a .120" thick cometic gasket, but they are expensive...

Re: Pistons for 360 [Re: dizuster] #840097 10/30/10 08:23 AM 10/30/10 08:23 AM
Joined: Jan 2003 Posts: 1,607 Lapeer, MI. todd440 top fuel
todd440 top fuel Joined: Jan 2003 Posts: 1,607 Lapeer, MI.	Depending on what you want, I can have custom Diamond pistons made. If you go to a full dish design, then up to a 50cc dish is not a problem. I can even do a group buy if I get at least 5 sets of the same piston.

Re: Pistons for 360 [Re: dizuster] #840098 10/30/10 09:25 PM 10/30/10 09:25 PM
Joined: Jul 2004 Posts: 143 New Brunswick, Canada C CoyoteJack OP member
CoyoteJack OP member C Joined: Jul 2004 Posts: 143 New Brunswick, Canada	I am only looking at running 8 lbs of boost. But you know how that goes. If 8 lbs is good then 10 must be better, and so on. LOL Jack

Re: Pistons for 360 [Re: todd440] #840099 10/30/10 09:27 PM 10/30/10 09:27 PM
Joined: Jul 2004 Posts: 143 New Brunswick, Canada C CoyoteJack OP member
CoyoteJack OP member C Joined: Jul 2004 Posts: 143 New Brunswick, Canada	Quote: Depending on what you want, I can have custom Diamond pistons made. If you go to a full dish design, then up to a 50cc dish is not a problem. I can even do a group buy if I get at least 5 sets of the same piston. What kind of money are you talking about. By the way I won't be building this until the spring. Just trying to get my head around what is required first. Jack

Re: Pistons for 360 [Re: CoyoteJack] #840100 10/31/10 08:56 PM 10/31/10 08:56 PM
Joined: Jan 2005 Posts: 3,635 Oakland, MI D dizuster master
dizuster master D Joined: Jan 2005 Posts: 3,635 Oakland, MI	Are you trying to run this thing on pump gas? Even so, I wouldn't be afraid to run 8~10psi with a 6-71 at 8.5:1. You could get there with the Probe's that I mentioned above. The top ring is .320" down from the crown as I remember. So not a bad choice for a blower piston... With a splash of race gas, you could run even more if you wanted to "turn it up".

Re: Pistons for 360 [Re: dizuster] #840101 11/01/10 08:36 AM 11/01/10 08:36 AM
Joined: Jul 2004 Posts: 143 New Brunswick, Canada C CoyoteJack OP member
CoyoteJack OP member C Joined: Jul 2004 Posts: 143 New Brunswick, Canada	Quote: Are you trying to run this thing on pump gas? Even so, I wouldn't be afraid to run 8~10psi with a 6-71 at 8.5:1. You could get there with the Probe's that I mentioned above. The top ring is .320" down from the crown as I remember. So not a bad choice for a blower piston... With a splash of race gas, you could run even more if you wanted to "turn it up". Yes on the pump gas. This is going to be a street engine to replace my current LA/Magnum hybrid. A great working engine but I want the eye candy sticking out of the hood. Not to mention the extra thrills of close to 600 HP and TQ. Do you have a part number for that probe piston? I would like to check it out. Jack

Re: Pistons for 360 [Re: CoyoteJack] #840102 11/01/10 03:39 PM 11/01/10 03:39 PM
Joined: Jan 2005 Posts: 3,635 Oakland, MI D dizuster master
dizuster master D Joined: Jan 2005 Posts: 3,635 Oakland, MI	Sure, no problem... http://www.probeindustries.com/Chrysler_360_14_5cc_Reverse_Dome_SRS_Pistons_p/12351.htm I got them from www.cnc-motorsports.com They were BY FAR the best price. Just call them and tell them what you want to order, it's not on their website.

Re: Pistons for 360 [Re: dizuster] #840103 11/01/10 03:55 PM 11/01/10 03:55 PM
Joined: Jul 2004 Posts: 143 New Brunswick, Canada C CoyoteJack OP member
CoyoteJack OP member C Joined: Jul 2004 Posts: 143 New Brunswick, Canada	Quote: Sure, no problem... http://www.probeindustries.com/Chrysler_360_14_5cc_Reverse_Dome_SRS_Pistons_p/12351.htm I got them from www.cnc-motorsports.com They were BY FAR the best price. Just call them and tell them what you want to order, it's not on their website. They must have added them to the website since you bought them. Strange that the compression ratio is a little different from Probes site. I would still have to use a thick gasket to get down to the compression ratio I want, but I can live with that. Thanks Jack

Re: Pistons for 360 [Re: CoyoteJack] #840104 11/01/10 04:17 PM 11/01/10 04:17 PM
Joined: Sep 2007 Posts: 468 Dirty Dena, Maryland dodge turbo mopar
dodge turbo mopar Joined: Sep 2007 Posts: 468 Dirty Dena, Maryland	like i said call Ross they will make you a custom piston for the same price as a shelf piece 78 Adventurer 150small block turbo'd 360w/Borg S475....smoke'em

Re: Pistons for 360 [Re: dodge turbo] #840105 11/01/10 08:14 PM 11/01/10 08:14 PM
Joined: Jan 2005 Posts: 3,635 Oakland, MI D dizuster master
dizuster master D Joined: Jan 2005 Posts: 3,635 Oakland, MI	I'm sorry man... but you can't get a Ross custom made for $499 shipped with pins... The off the shelf Ross flat top is $100 more then that, and they don't even offer a dished shelf piston from what I see... How can they be cheaper then that? BTW... not to hi-jack but Dodge Turbo your truck is awesome... check your PM...

Re: Pistons for 360 [Re: dizuster] #840106 11/01/10 08:24 PM 11/01/10 08:24 PM
Joined: Jan 2003 Posts: 1,607 Lapeer, MI. todd440 top fuel
todd440 top fuel Joined: Jan 2003 Posts: 1,607 Lapeer, MI.	I'm still waiting to hear back from my Diamond rep for pricing. The way I figure it, at 62cc head, 9.0 cc gasket, ect, you would need a 30cc dish to get you to 8.4 to 1. That's based off of .030 over on a 360, stock stroke.

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