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Topic: ID this piston

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AZKC

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Posted: May 06 2005,7:53 am

Post # 1

OK I've got some numbers off the piston I'm trying to match, looked around a little but not much luck.

You guys try.... :stupid

1010 6436 #7 GM

Thats all I see but we all know about me and seeing things :banghead

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GoFastRacer Male

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Posted: May 06 2005,8:29 am

Post # 2

I can't find it, probably an aftermarket?????, :stupid

just measure the dome and get the same thing, it all has to be balanced again anyhow!.. :good

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AZKC

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Posted: May 06 2005,9:40 am

Post # 3

Which one did you copy paste from HB or Dougs :comp

How the hell do ya measure the dome and can I not match the weight to one of the other piston rod assmblies :stupid

How do ya tell if its cast or forged?

Doesn't the GM make it OEM?

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Sleek-Jet

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Posted: May 06 2005,9:43 am

Post # 4

Quote (AZKC @ May 06 2005,9:40 am)

Which one did you copy paste from HB or Dougs :comp

Ã‚Â How the hell do ya measure the dome and can I not match the weight to one of the other piston rod assmblies :stupid

How do ya tell if its cast or forged?

Doesn't the GM make it OEM?

What, you don't have a graduated cylinder and plate to do a CC measurment???

Since they are flat tops, I wouldn't think that the valve reliefs are more than a few CC's worth of volume.

A dog doesn't care if you're rich or poor, educated or illiterate, clever or dull. Give him your heart and he will give you his.

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GoFastRacer Male

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Posted: May 06 2005,10:06 am

Post # 5

Quote (AZKC @ May 06 2005,10:40 am)

Which one did you copy paste from HB or Dougs :comp

Ã‚Â How the hell do ya measure the dome and can I not match the weight to one of the other piston rod assmblies :stupid

How do ya tell if its cast or forged?

Doesn't the GM make it OEM?

Ok just took another look, you don't have a dome, never seen those before, they may be a truck piston :stupid

That is cast for sure but the easy way to tell is a cast piston has a metal support in the casting aroung the wrist pin, a forged don't, not to mention a cast piston looks like shit, :laugh

You can match the weight but you will have to take a piston off one of the other rods to do that!.. I'd take one over to Larry and see if he knows what it is, he deals with that stuff on a daily basis, I'm sure he's seen those before, I just use normal stuff!.

I know what I would do though!..

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AZKC

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Posted: May 06 2005,10:21 am

Post # 6

Quote (Sleek-Jet @ May 06 2005,9:43 am)

Quote (AZKC @ May 06 2005,9:40 am)

Which one did you copy paste from HB or Dougs :comp

Ã‚Â How the hell do ya measure the dome and can I not match the weight to one of the other piston rod assmblies :stupid

How do ya tell if its cast or forged?

Doesn't the GM make it OEM?

What, you don't have a graduated cylinder and plate to do a CC measurment???

Ã‚Â

Since they are flat tops, I wouldn't think that the valve reliefs are more than a few CC's worth of volume.

I was just going to use Saran Wrap and a measuring cup that should get me close :break

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AZKC

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Posted: May 06 2005,10:26 am

Post # 7

Got a part number from one of our parts suppliers, just need to figure out if its cast or forged, the number crossed to either or :stupid

Forged was a L2377F Cast is a H661CP .

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GoFastRacer Male

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Posted: May 06 2005,10:37 am

Post # 8

Quote (AZKC @ May 06 2005,11:21 am)

Quote (Sleek-Jet @ May 06 2005,9:43 am)

Quote (AZKC @ May 06 2005,9:40 am)

Which one did you copy paste from HB or Dougs :comp

Ã‚Â How the hell do ya measure the dome and can I not match the weight to one of the other piston rod assmblies :stupid

How do ya tell if its cast or forged?

Doesn't the GM make it OEM?

What, you don't have a graduated cylinder and plate to do a CC measurment???

Ã‚Â

Since they are flat tops, I wouldn't think that the valve reliefs are more than a few CC's worth of volume.

I was just going to use Saran Wrap and a measuring cup that should get me close :break

Ã‚Â

Damn wish I could afford all that high tech equipment!.. :eek

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GoFastRacer Male

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Posted: May 06 2005,10:39 am

Post # 9

Quote (AZKC @ May 06 2005,11:26 am)

Got a part number from one of our parts suppliers, just need to figure out if its cast or forged, the number crossed to either or :stupid

Forged was a L2377F Cast is a H661CP .

The compression height is probably the same but I bet the configuration won't be!.. :stupid

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AZKC

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Posted: May 06 2005,10:40 am

Post # 10

Configuration??

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Sleek-Jet

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Posted: May 06 2005,10:46 am

Post # 11

Quote (AZKC @ May 06 2005,10:40 am)

Configuration??

Valve reliefs and ring lands I'm thinking??

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GoFastRacer Male

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Posted: May 06 2005,11:13 am

Post # 12

Quote (AZKC @ May 06 2005,11:40 am)

Configuration??

Yeah, the top ain't going to look like this!.

Attached Image

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AZKC

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Posted: May 06 2005,11:31 am

Post # 13

Well it will have one valve relief for sure by description. Trying to locate one locally to compare.

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AZKC

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Posted: May 06 2005,11:33 am

Post # 14

Quote (GoFastRacer @ May 06 2005,10:06 am)

That is cast for sure but the easy way to tell is a cast piston has a metal support in the casting aroung the wrist pin, a forged don't, not to mention a cast piston looks like shit, :laugh

I remember those steel plates from the last motor I junked they are still laying in the bottom of the Milidon pan :break

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GoFastRacer Male

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Posted: May 06 2005,11:38 am

Post # 15

Quote (AZKC @ May 06 2005,12:33 pm)

Quote (GoFastRacer @ May 06 2005,10:06 am)

That is cast for sure but the easy way to tell is a cast piston has a metal support in the casting aroung the wrist pin, a forged don't, not to mention a cast piston looks like shit, :laugh

I remember those steel plates from the last motor I junked they are still laying in the bottom of the Milidon pan :break

Yep, those would be cast pistons!.

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GoFastRacer Male

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Posted: May 06 2005,11:40 am

Post # 16

Quote (AZKC @ May 06 2005,12:31 pm)

Well it will have one valve relief for sure by description. Trying to locate one locally to compare.

Ya know, if you go to one of those "fleet" rebuilder places I bet they would have them on the shelf, just thought of that!.. :banghead

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AZKC

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Posted: May 06 2005,12:00 pm

Post # 17

I went out and looked at the piston and I see some sort of plate but it runs parallel to the ring lands right about at the oil ring area. I don't see anything around the wrist pin area. I seem to remember those metal plates having a hole or round part that went around the wrist pin :stupid

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AZKC

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Posted: May 06 2005,12:07 pm

Post # 18

This is a cast piston out of the 40 over block. The piston I'm chasing doesn't seem to be similar.

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AzMandella Male

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Posted: May 06 2005,12:20 pm

Post # 19

Quote (GoFastRacer @ May 06 2005,12:13 pm)

Quote (AZKC @ May 06 2005,11:40 am)

Configuration??

Yeah, the top ain't going to look like this!.

Hey Art is that a pic of one of Kevins pistons?That doesn't even look like a true flat top.It looks like it has a small dish.If so he needs to make sure he gets the same cc dish.

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AZKC

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Posted: May 06 2005,1:46 pm

Post # 20

Yep thats one of mine :good

Squezin Spectra seems to have a match over on Hotboat. :rolleyes

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GoFastRacer Male

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Posted: May 06 2005,2:35 pm

Post # 21

Quote (AZKC @ May 06 2005,1:07 pm)

This is a cast piston out of the 40 over block. The piston I'm chasing doesn't seem to be similar.

Yep that is cast, you can also tell by the casting lines!.. The one you're looking for is from a different MFG that's why it don't look the same!..

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GoFastRacer Male

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Posted: May 06 2005,2:37 pm

Post # 22

Quote (AZKC @ May 06 2005,1:00 pm)

Different MFG's have different ideas on how to make stuff!..

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GoFastRacer Male

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Posted: May 06 2005,2:37 pm

Post # 23

Quote (AzMandella @ May 06 2005,1:20 pm)

Quote (GoFastRacer @ May 06 2005,12:13 pm)

Quote (AZKC @ May 06 2005,11:40 am)

Configuration??

Yeah, the top ain't going to look like this!.

Hey Art is that a pic of one of Kevins pistons?That doesn't even look like a true flat top.It looks like it has a small dish.If so he needs to make sure he gets the same cc dish.

Yep it does have a dish!.

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