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View Full Version : FS: 8 custom CP pistons 4.125 bore

tpepmeie
05-06-2010, 09:22 PM
I have a set of CP Pistons for 4.125 bore. These came without valve reliefs, so I had to order a second set for my motor. These are the "X-forging" very lightweight design. They would work great with a 4.000 stroke and 6.000 rods. CH=1.025. These are almost $700 wholesale/$1k retail. No pins or rings.

>> PRICE REDUCED << $400.

http://i1036.photobucket.com/albums/a441/tpepmeie/IMG_1577-Copy.jpg

http://i1036.photobucket.com/albums/a441/tpepmeie/IMG_1578-Copy.jpg

http://i1036.photobucket.com/albums/a441/tpepmeie/IMG_1580-Copy.jpg
VetteVet
05-08-2010, 12:42 AM
Todd,

I might be interested. Can you provide specs on the dish volume and ring sizes?
tpepmeie
05-08-2010, 10:47 AM
Todd,

I might be interested. Can you provide specs on the dish volume and ring sizes?

-17.6 cc dish volume. 1.2mm/.043/3mm ring pack.
tpepmeie
11-30-2013, 08:18 AM
TTT. These need to go to a new home. Surely somebody in the FBI crew is thinking about a AES big-bore motor. These are perfect for it.
pantera1683
11-30-2013, 10:03 AM
same price?
XfireZ51
11-30-2013, 10:09 AM
Any other configurations besides a 415?
cvette98pacecar
11-30-2013, 11:54 AM
409 with 3.82 regrind.
tpepmeie
11-30-2013, 01:48 PM
So, lots of guys asking about compatibility. These are 1.025" compression height.

figure the stock deck height is 9.025"

(stroke /2) + Rod length + 1.025" = 9.025

I use these with a 4" stroke and 6" rods, so
(4/2) +6 + 1.025 = 9.025

You could figure out other combinations.
tpepmeie
11-30-2013, 01:52 PM
could also do a 3.75" offset ground crank, with 6.125" rods.
tpepmeie
12-01-2013, 05:55 PM
Price reduced to $500. These need to go, or I might have to build a big bore 401 :)
Jagdpanzer
12-01-2013, 07:41 PM
Todd,
What does the static compression ratio work out to with stock size combustion chambers and stock head gasket?
tpepmeie
12-01-2013, 07:48 PM
Todd,
What does the static compression ratio work out to with stock size combustion chambers and stock head gasket?

13:1 with a 4" stroke, or ~12.25:1 with a 3.75" stroke.
tpepmeie
10-19-2014, 07:53 PM
$400, or make me an offer.
pantera1683
10-22-2014, 05:00 PM
Will these work with oversized valves?
tpepmeie
10-23-2014, 08:05 AM
Will these work with oversized valves?

Yes as long as the valve lift is kept in the .440 or less range.