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Re: New 470 build needs your help!!! [Re: DanteGray] #1258472 07/03/12 11:18 PM 07/03/12 11:18 PM
Joined: Jan 2003 Posts: 5,875 communist bloc of new jersey J jamesc master
jamesc master J Joined: Jan 2003 Posts: 5,875 communist bloc of new jersey	Quote: Yea I have been looking at the 1.320piston and 6.7 rod. The pistons are over $700 with no rings, by Diamond Racing. what piston would that be? i don't know of any stocking piston they list to fit these dimensions, at least i didn't see it in their catalog when i was looking. i can't remember all the standard dimensions but i thought the rods were 6.76

Re: New 470 build needs your help!!! [Re: jamesc] #1258473 07/03/12 11:52 PM 07/03/12 11:52 PM
Joined: Aug 2006 Posts: 2,141 junction city oregon V viperblue72 top fuel
viperblue72 top fuel V Joined: Aug 2006 Posts: 2,141 junction city oregon	1.32ch piston is a very popular piston as it is used in stroker 440 combos too. The 6.7 rod is an aftermarket rod for chevy's. But can be used for other motor combos.

Re: New 470 build needs your help!!! [Re: viperblue72] #1258474 07/04/12 12:32 AM 07/04/12 12:32 AM
Joined: Jan 2003 Posts: 5,875 communist bloc of new jersey J jamesc master
jamesc master J Joined: Jan 2003 Posts: 5,875 communist bloc of new jersey	ok i was figuring he must have meant a chevy rod but didn't know 6.7 was a stocking size i always remember chevy rods as being mostly 6.x35" until you get into the 7.xx". i was also looking at the lo deck offerings as opposed to the RB i was looking around for a dished piston for a 470" setup i have but wanted to use the 6.76 manley sportsmasters i have. i couldn't find anything and best i can tell (and it's a guess) it looks like when you get into a 1.32CH dished piston they may push the ring pack down so the wrist pin ends up in the oil ring whereas with a 1.32CH standard crown the pin isn't in the ring. do people ever run into skirt/counterweight interference problems when going off a CH that's listed for a different rod length than the one being used as long as the assembly stacks up the the desired deck height. and anyone know why would these pistons weigh as much as they do? i realize it's not a top shelf piston but still a 1.32 coming in at 709 grams i just can't believe that's not a misprint. http://www.cnc-motorsports.com/icon-ic837-033-forged-dish-pistons-4-375-bore-1.html

Re: New 470 build needs your help!!! [Re: jamesc] #1258475 07/04/12 12:50 AM 07/04/12 12:50 AM
Joined: Jan 2003 Posts: 5,875 communist bloc of new jersey J jamesc master
jamesc master J Joined: Jan 2003 Posts: 5,875 communist bloc of new jersey	incidentally the pistons i have are the Ross 99496 which is a 4.375, 1.238CH piston with a .990 pin and the pin is in the oil ring. i was looking to drop the CR some to run pump gas. i even called ross and asked about minimum crown thickness and where i "might" be able to remove some material to drop the CR. i wrote down the info then promptly lost it

Re: New 470 build needs your help!!! [Re: jamesc] #1258476 07/13/12 03:26 PM 07/13/12 03:26 PM
Joined: Jun 2010 Posts: 15 Ruther Glen, Virginia D DanteGray OP member
DanteGray OP member D Joined: Jun 2010 Posts: 15 Ruther Glen, Virginia	Quote: ok i was figuring he must have meant a chevy rod but didn't know 6.7 was a stocking size i always remember chevy rods as being mostly 6.x35" until you get into the 7.xx". i was also looking at the lo deck offerings as opposed to the RB i was looking around for a dished piston for a 470" setup i have but wanted to use the 6.76 manley sportsmasters i have. i couldn't find anything and best i can tell (and it's a guess) it looks like when you get into a 1.32CH dished piston they may push the ring pack down so the wrist pin ends up in the oil ring whereas with a 1.32CH standard crown the pin isn't in the ring. do people ever run into skirt/counterweight interference problems when going off a CH that's listed for a different rod length than the one being used as long as the assembly stacks up the the desired deck height. and anyone know why would these pistons weigh as much as they do? i realize it's not a top shelf piston but still a 1.32 coming in at 709 grams i just can't believe that's not a misprint. http://www.cnc-motorsports.com/icon-ic837-033-forged-dish-pistons-4-375-bore-1.html With the 6.76 rod you could have used the 1.270 BBC piston off shelf (454+1.25). The piston difference is the piston you are talking about is a "step dish" not a "dish" piston, they might contact the heads I dont know. Plus the weight difference is about 30g ea or 1oz, probably nothing I will see on the street but knowing I'm using the good light parts. Yea the Rods I just got are BBC 6.700 eagle H-beam(CRS67003d)2.20 and .990 pin weigh 815g. Im ordering Diamond pistons #52407 4.375 bore, 1.320ch, 12.5 dish in .990 pin 537g + 140g pin = 677g. Ordering Indy EZ w/ MAX wedge intakes @ 77cc. about 10.9 static compression. Looking at Voodoo solid roller #60334, that will yeld 8.3 dynamic compression and 600+hp and 600+tq on pump gas . Now I just have to figure the suspension out (600+hp and 600+tq) Any comments?

Re: New 470 build needs your help!!! [Re: DanteGray] #1258477 07/13/12 11:10 PM 07/13/12 11:10 PM
Joined: Jan 2003 Posts: 17,924 Akron, Ohio ProSport I Live Here
ProSport I Live Here Joined: Jan 2003 Posts: 17,924 Akron, Ohio	That will be a very easy and fun combo, my old 3050# DartSport ran 9.80's with a low deck 451, cheap 590 purple shaft solid cam, Edelbrock heads and 2" MadDog headers. 7291578-100_9055-vi.jpg (66 downloads) 1970 Challenger, all aluminum 528 Hemi, HDK suspension, Tremec 5 speed manual

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