NorCalChris
NAXJA Forum User
- Location
- Central Coast, Ca
Not only did I find the CP pistons, but its an .020 overbore. Haha. Never thought I'd find that. Figured I'd share with you guys. lol.
So today I was replacing a Head Gasket......and found CP pistons!
- Thread starter NorCalChris
- Start date
NorCalChris
NAXJA Forum User
- Location
- Central Coast, Ca
Haha no Im ok. I got this engine originally to use the block for my 4.7 build, evidently someone else has already been into it. It must have been an overheated engine that they rebuilt and had to bore slightly.
NorCalChris
NAXJA Forum User
- Location
- Central Coast, Ca
So I guess they arnt CP pistons like I thought, but cheap sealed power pistons.
I have +.030" sealed power h825cp30s in my 4.6. H=hyperteutectic, CP=coated skirts. The non-coated Sealed Powers were the 677p. Even though it's over-bored .020", the pin height on the SPs are .010" lower, and the dish is bigger than the stock piston, so no compression increase.
edit: If head wasn't shaved, nor block decked, yours went from 8.8:1 down to 8.5:1.
edit: If head wasn't shaved, nor block decked, yours went from 8.8:1 down to 8.5:1.
Last edited:
Boostwerks.com
NAXJA Forum User
- Location
- Colorado
Boost 
NorCalChris
NAXJA Forum User
- Location
- Central Coast, Ca
Well it says 577cp .020 03-106-16-c
I didnt rebuild this one so I have no idea whats been done, its already back together so I'm not going to measure anything. Interesting find though.
I didnt rebuild this one so I have no idea whats been done, its already back together so I'm not going to measure anything. Interesting find though.
NorCalChris
NAXJA Forum User
- Location
- Central Coast, Ca
I just pulled the head on that engine to port it, and replace the head gasket. While cleaning off the tops of the pistons I noticed they had a stamp. That's all I did. If it says CP then I'm sure they have coated skirts. The XJ It came out of I bought for $500. I made about 750 off it plus kept the engine, trans and tcase combo. So far I have no regrets on parting that XJ out. lol.
DanMan2k06
NAXJA Forum User
- Location
- Damascus, MD
Those are the best deals. Grab it, take what you need, flip it and make loads of bread.
I'm still tempted to carmax my $750 xj lol. I'd probably get around $3000 for it.
I'm still tempted to carmax my $750 xj lol. I'd probably get around $3000 for it.
