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Discussion Starter #1
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?
 

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TRW, and manley both make good pistons as does probe industries, and manley makes good rods along with crower.
 

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by the way, summit racing is my favorite place to shop for parts on the net.
 

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measure teh bore in the block and get the pistons that match that bore.
Unless your block has been bored in the past, you should be using stock size pistons.

Also, are YOU going to bore? Just get the size you need depending on how big you bore (.010, .020 over, etc).
 

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Stock is 3.551 with very little to choose from on summit.... Would the 3.552 work? Much more variety
I was under the impression that stock is 3.552".

Where did you get the info 3.551" is stock?
 

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I was under the impression that stock is 3.552".

Where did you get the info 3.551" is stock?
I searched 95 thunderbird pistons on summit, showed 3.551

What's piston head volume? More is better?:confused:
Compression distance?
Wrist pin style press fit or floating?
There all 3.552 but have different sizes in these i just mentioned
 

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What's piston head volume? More is better?:confused:
Compression distance?
Wrist pin style press fit or floating?
There all 3.552 but have different sizes in these i just mentioned
Wrist 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"

For Reference:
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.....
 

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I'm a fan of oliver and carrillo. Manley is good too.
 

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U need Mahle pistons and Manley rods I know were some are
 

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Discussion Starter #15
Wrist 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"

For Reference:
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.....
Thanks for the info
:zbeer:
 

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When my motor sucked a bolt in a couple years back the Manley rod took the hit like a champ and is still doing the up/down thing. The CP piston however made a nice ashtray.

-Scott
 

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95chickn,

I've got Diamond pistons and Manley rods with a cst crankshaft in my big bore / SVO setup which pushes 12 lbs of boost. The rotating assembly has held up well for 7,000 miles and a lot of dragstrip passes.
 
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