Diamond Forged high compression flat top pistons

09-24-2011, 11:52 AM

#1

TheHitman

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Diamond Forged high compression flat top pistons

Category: Accessories
Price: $375
Part Fits: 2010+ Camaro, Corvette, 04-06 Pontiac GTO, 04+ Cadillac CTS-V
Location (State): TN
Item Condition: Used
Shipping Information: Item Can be Shipped
Engine: LS2/LS3/LS7/L92/LS9, LS1/LS6
LS Engine?: Fits LS Engine

Hello all. I am selling these diamond forged high compression pistons. They came were in an LS2 based forged 402 stroker shortblock that I ordered and the compression was too high for my needs. The pistons have 0 miles and are flat top pistons with with 2cc valve reliefs. The bore is .005 over and the pistons are good for 11:5.1 compression. I am letting these go for $400 local pick up or shipped.

EDIT: additional information on the pistons are as follows:

Part Number
11540
Bore
4.005"
Stroke
4.000"
Rod Length
6.125"
Comp. Height
1.115"
Wrist Pin
.927" x 2.500"
Top Ring Down

Last edited by TheHitman; 10-04-2011 at 11:46 PM.

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09-25-2011, 08:21 PM

#2

TheHitman

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These are diamond part number 11540. They come with rings already gapped and are for a 4.005" bore.

Top ring gap - .025"
Second ring gap - .020"

Last edited by TheHitman; 09-25-2011 at 09:07 PM.

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09-26-2011, 08:00 PM

#3

Pewter53

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Whats rod length and how much of a shot will these work with?

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09-26-2011, 08:05 PM

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deeloc1

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Do you have a part number for the pistons? They were 11:5 compression with what size cc head?

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09-26-2011, 08:22 PM

#5

deeloc1

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Here's the specs, guys! These are a little higher than i was looking for...was hoping more for like 11:5 comp with my 64cc heads since we only have 91 octane in California

http://www.excessiveracing.com/Diamond11540.aspx

Manufacturer: Diamond Racing Products
Part No.: 11540

Compression Ratios
62cc 12.3:1
66cc 11.7:1
70cc 11.2:1

* Includes Oil Rail Supports
Part Number
11540
Bore
4.005"
Stroke
4.000"
Rod Length
6.125"
Comp. Height
1.115"
Wrist Pin
.927" x 2.500"
Top Ring Down

.210" to .250"

Piston Material
2618 Alloy
Piston Style
Flat Top
Volume -2cc
Ring Stack

1.5mm x 1.5mm x 3.0mm

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