Im looking for a Strong Rod n Piston kit for my SvO car. Car has pi heads and Stock 95 block.Lookin for something thats gone hold up well. What brand and website?
I searched 95 thunderbird pistons on summit, showed 3.551I was under the impression that stock is 3.552".
Where did you get the info 3.551" is stock?
Wrist pins on our engines are press fit - most 4v 4.6L engines have full floating.What's piston head volume? More is better?
Wrist pin style press fit or floating?
There all 3.552 but have different sizes in these i just mentioned
Thanks for the infoWrist pins on our engines are press fit - most 4v 4.6L engines have full floating.
The piston dish volumes come in many different sizes.
Stock for a 1995 TBird/Coug 4.6L is 10.49cc which with stock NPI heads results in about 9.2:1 compression ratio.
Popular swap is to bolt on PI heads which are 42.45cc as opposed to the NPI heads which are 51.8cc.
Used with the stock 10.49cc NPI piston results in a compression bump up to about 10.3:1.
Compression height is 1.223"
1992-98 Romeo NPI Engine Pistons: 10.49cc
1999-2000 Windsor PI Engine Pistons: 18.10cc
2000-2004 Romeo PI Engine Pistons: 15.80cc
1993-1998 4.6L 4v Engine Pistons: 2.66cc
1999-2002 4.6L 3v Engine Pistons: 4.54cc
1998-2000 5.4L 4v Engine Pistons: 0cc (flat-top)
(all these pistons have similar compression heights ranging from 1.220-1.223")
And to answer "more is better" question - think how you want to use your car and more specifically, what fuel you plan on using.
Obviously the smaller the chamber, the higher the compression.
If you run long-duration cams, you can get away with more compression than with stock PI cams and still run pump gas.
I'll let others take over as to what compression is best.....