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You made a lot of good points demon. To sum things up the way I understood them, If I spent all the money on the forged interals and run a lot of boost I could be wasting my money due to the platform of our cars, I would not have the traction to do use any of that power. I want this to be a powerful street car. It has to be relible and trustworthy, and be very fast. So say I decided to throw in those sealed power pistons that tom gave to me. From I understand about these pistons They are comparible to the revised 3L pistons, they fit the stock bore and they keep the stock compresion ratio. My main question is if installed these ( with a fidenza flywheel and a DMD) would I need a rebalnce?. Please correct if any of this information is incorrect about these pistons. But these "Sealed power" pistons have a different style ring arrangemnt and they will seal better than stock pistons? There for I could run more boost. Quote:
Our engine design is very good at being very resistant to detonation. (I.E. 13+psi from a T28 on 10.31 CR!)
Tom ran ~10psi on both his 10.25-10.3CR 3L and 10.1CR oval port 3L
So 13psi is the highset known boost level on the stock CR? So say on my dual satge boost controller I ran 7psi all day on the street and I put 12psi on the switch... Would that be safe?
Quote:
Stock oval port cams for 5-9psi. (mad early TQ hump & they can't support high rpm anyway)
SVT cams for 9psi and above. (nice TQ, FLAT TQ, KILLER HP above 5000rpm)
Or I could run 9psi all day and 12psi on the switch since I will be using SVT cams.
Demon, Please give me your thoughts on those sealed power pistons and everything stated above. Thanks
-Jeff-
1998 Black SVT
Morette Twin headlight conversion
Street flight turbo kit collecting dust!
Rebuilding my 3.0L
check it out
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I think it's a question of the rings more than the material of the piston. But it is true that forged pistons are less likely to melt from detonation. . .I was at the same cross roads as you and I decided that I wasn't going to risk it and just go all forged, and running street trim at 10psi and track trim at whatever Keyser finds to be safe. . .
Bringing the CR to 9:1 is the MOST optimal CR you can get because you won't have to worry about lag or power loss, nor do you have to boost the bejesus out've your engine, allowing less wear on the turbo and the entire setup in the long run. . .the Minus is of course the fact that you risk detonation. . .but even Tom and I have talked about this, and at 9:1 you'd be ok to "test the limits" of a forged piston, ie safe on 10psi or more. . .the Ross Forged Pistons at 8.5:1 are a great option for 3L and should be seriously considered, if not only because they are forged, but because of the safe relocation of the rings so that the 2nd to oil gap is larger. . .
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The sealed power pistons have the revised ring lands.
They are a high quality hypereutectic piece.
The revised OEM pistons are high quality as well.
A Forged piston does give you a higher strength if you wanted to push the boost/power level up.
However with your range of 7-10psi you would not need them.
2000 SVT #674
13.47 @ 102 - All Motor!
It was not broke; Yet I fixed it anyway.
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Quote:
at 9:1 you'd be ok to "test the limits" of a forged piston, ie safe on 10psi or more. . .the Ross Forged Pistons at 8.5:1 are a great option for 3L and should be seriously considered, if not only because they are forged, but because of the safe relocation of the rings so that the 2nd to oil gap is larger. . .
So if I wanted a bulletproof bottom end for my 3L, I could run either CR.
Right now the setup I am considering is.
My stock 3L block, pauter rods and the diamond forged 9:1 pistons. That is the most expensive setup  But I really want to build this car right. It will probably take me up to next year to finish it but I think in the end, I will be happy with it. I belive with the setup stated above I should be able to boost up to 15psi easy and put down serious hp/tq numbers. And it would be a wicked fast freeway monster  But just for my curiosity I would like to take a poll.
Thanks guys,
-Jeff-
1998 Black SVT
Morette Twin headlight conversion
Street flight turbo kit collecting dust!
Rebuilding my 3.0L
check it out
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9:1!!!
It's what I'm running (going to run I guess, once built)
It's What Chris at SF is doing,
BurritaSVT is doing it.
We're ALL DOING IT.
Like I said, I think the Ross Ones are great, I don't know how much .5CR will change spool time, how much extra boost you'll need, etc. BUT, it depends on your $$$$. If you have access to the Diamonds, go for it. I know the Ross ones are at Draxas.com, and they're CHEAP TOO!! (comparatively).
both are awesome companies, go with the $$$ factor (Does diamond have to make another set for you?)
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crap I just looked, go with the Ross. . .they COME with the rings, the diamond ones you'll have to find a set (unless Diamond will contract with Power Seal or whatever the hell rings we got. . .rings are like $150!!). . .and they're $600+shipping, that's dirt cheap man. . .GO FOR IT!
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The diamond pistons came with total seal file to fit rings, at least mine did when I had them 
'99 Silver svt
For sale
19" Axis Neo wheels
3.0 parts, pre-98 trunk,
Check classifieds
bp.powell@comcast.net
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the only thing you may have to do is get your engine reboned since the ross racing pistons are a 1mm overbore. They come with everything you need though.
arent they purdy? 
Jim Hahn
1996 T-Red Contour SE Reborn 4/6/04
3.0L swap and Arizona Dyno Chip Turbo Kit
364 whp, 410 wtq @ 4,700 rpm
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Originally posted by ssmumich00:
crap I just looked, go with the Ross. . .they COME with the rings, the diamond ones you'll have to find a set (unless Diamond will contract with Power Seal or whatever the hell rings we got. . .rings are like $150!!). . .and they're $600+shipping, that's dirt cheap man. . .GO FOR IT!
The money is not a big issue to me, At first I was anxious to have this motor built by this summer time, and now I just want to build it right, I can wait and save money.
The deal is,
If I buy the forged rods I can get the ross pistons for $500, If I just buy the pistons they are $600
The diamond pistons with rings and wrist pins are $714.
So there is not too much of difference. I just want what is best.
Also I just noticed that, the diamond pistons I had were only a .5mm over bore, and the ross are 1mm overbore... How much will that come into play?
Beyondloadedse: You are using the 8.5:1 CR correct? your car is running now? how do you like it?
-Jeff-
1998 Black SVT
Morette Twin headlight conversion
Street flight turbo kit collecting dust!
Rebuilding my 3.0L
check it out
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interesting, the Ross pistons aren't flat topped???
The diamond ones are flat topped, Demon-how's that affect detonation, etc.???
Mine came with total seal rings, I forgot the name of the company, but we did have to pay extra with the GB,
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