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Raptor 700 Information => 700 Motor Mods => Topic started by: wobble on July 16, 2010, 09:17:39 AM

Title: Piston Weights
Post by: wobble on July 16, 2010, 09:17:39 AM

Weights stated below include piston, rings, clips, and wrist pin.

Stock piston setup is 535-540 grams

JE 12.5:1 102mm = 487.7 grams
JE 10.75:1 105.5mm = 490 grams
JE 12:1 105.5mm = 506.8 grams
Venom 14.25:1 105mm = 521 grams
CP 11:1 102mm = 524.9 grams
CP 12:1 105mm = 533 grams
Wiseco 11:1 103mm = 535.4 grams
CP 11:1 102mm (corrected deck height) = 545 grams
RE 14:1 102mm Lightweight = 545 grams
CP 13:1 105mm = 554-559 grams
RE 14:1 105mm Lightweight = 575-579 grams
Barkers Diamond 14:1 105mm = 596 grams

Title: Re: Piston Weights
Post by: Colorado700R on July 16, 2010, 09:19:34 AM

When I pull my CP 102 bore 12-1 I'll weigh it to add to the list Dave :thumbs:

Thanks for the post!

Title: Re: Piston Weights
Post by: Peelz on July 16, 2010, 09:39:02 AM

very cool.

Title: Re: Piston Weights
Post by: wobble on July 16, 2010, 09:41:27 AM

Read the 2nd line of my post.  ;)

Title: Re: Piston Weights
Post by: Peelz on July 16, 2010, 09:52:51 AM

Quote from: wobble on July 16, 2010, 09:41:27 AM

Read the 2nd line of my post.  ;)

I don't know what you are talking about. :ninja: :lol:

Title: Re: Piston Weights
Post by: Troy31 on July 16, 2010, 08:13:47 PM

Quote from: Colorado700R on July 16, 2010, 09:19:34 AM

When I pull my CP 102 bore 12-1 I'll weigh it to add to the list Dave :thumbs:

Thanks for the post!

You do know it won't run without a piston?

Title: Re: Piston Weights
Post by: Spartan on July 16, 2010, 08:28:18 PM

Quote from: Troy31 on July 16, 2010, 08:13:47 PM

Quote from: Colorado700R on July 16, 2010, 09:19:34 AM

When I pull my CP 102 bore 12-1 I'll weigh it to add to the list Dave :thumbs:

Thanks for the post!

You do know it won't run without a piston?

He has a replacement to go in there :batman:

Title: Re: Piston Weights
Post by: DL700 on July 30, 2010, 08:29:08 PM

the NEW 11:1 CP 102 bore are about 5 grams heavier then stock on my scale...

Title: Re: Piston Weights
Post by: wobble on July 30, 2010, 08:31:25 PM

Thanks Daniel!

Wow. 17 grams heavier than the old version? Sounds like they added quite a bit of material to get it corrected deck height.  ???

Title: Re: Piston Weights
Post by: DL700 on July 30, 2010, 08:35:38 PM

yes, stock weighed 535-540 and the cp 545...

they added the material to the top of the piston to bring it up .030 from before

Title: Re: Piston Weights
Post by: wobble on July 30, 2010, 08:38:29 PM

Thanks! I appreciate the input.  :thumbs:

I noticed the three 105 bore 13:1 pistons I weighed were 554, 556, and 559. So there is definitely an acceptable +/- allowance for them, but this does give a good general idea.

Title: Re: Piston Weights
Post by: Spartan on July 30, 2010, 09:00:59 PM

So the new CP 11:1s are corrected deck now?

Title: Re: Piston Weights
Post by: DL700 on July 31, 2010, 11:01:09 AM

Quote from: Spartan727 on July 30, 2010, 09:00:59 PM

So the new CP 11:1s are corrected deck now?

yes and have been for a while.. same with the 12.

Title: Re: Piston Weights
Post by: Spartan on July 31, 2010, 04:34:12 PM

So do you happen to know if the one I got from you is corrected or not? It was about a year ago now...

Title: Re: Piston Weights
Post by: wobble on August 01, 2010, 01:13:47 AM

Look at the spec sheet that came with it.

Title: Re: Piston Weights
Post by: Spartan on August 01, 2010, 05:17:22 AM

Here's the sheet I found...Sorry for the semi-thread jack too..at least some good info is included in this post :lol:

Title: Re: Piston Weights
Post by: wobble on August 01, 2010, 08:46:46 AM

Compression height of 1.081 is not corrected deck height.

Title: Re: Piston Weights
Post by: Spartan on August 01, 2010, 08:47:12 AM

Damn I only got 9.9:1 compression then :(

Title: Re: Piston Weights
Post by: SprinterX on October 25, 2010, 11:22:37 AM

FYI - spoke with CP Pistons about their shelf pistons for the 700. They told me that all their shelf pistons have had the pin position relocated lower, thus increasing the compression height dimension and effectively making these "corrected height".

Also got the latest piston weights as follows:
(these include the pin, clips and ring set)

Stock   102mm     9.2:1    535-540g

M1039  102mm    11.0:1    521g
M1040  102mm    12.0:1    544g

M1041  105mm    10.75:1  528g
M1042  105mm    12.0:1    536g
M1053  105mm    13.0:1    558g
M1054  105.5mm 12.5:1    553g