Just wondering where I can get some d-cup pistons. Never found any. I think I'll use my Vortec heads with the new Vortec base TPI intake, but I'd like a 9:1 compression ratio. These heads are 64cc's. I want d-cup to keep a tight quench area, without the full dish. So these are my 2 choices..a 355 bottom end with d-cup forged pistons and a blower (future) or a flat-top 383 with a small shot of happy gas, perhaps. Intake is a SR, LT-4 hot cam. Anyway, where can I find these d-cup pistons (under a gajillion dollars)? My bottom end selection depends on it.

Anybody know what a 383 with the LT-4 cam sounds like???

 

KB makes 2 dish pistons for 383s with 5.7 rods.
The KB135 has a 18cc dish and the Kb197 has a 12cc. I think the 135 uses 5/64ths rings and the 197 uses 1/16s

KB also makes a 350 piston with a 12cc dish - Kb193 They do have a D type dish, but they arn't forged.

Speedpro makes a forged 350 with a 21cc dish
F2441 (38bucks each) You might have to get ross or JE to make you a set. I would not cut corners on the bottom end if you are going to try to SC it.



[This message has been edited by jcb999 (edited April 23, 2001).]

 

Now's an appropriate time to ask a question. I know there's 3 common types of pistons, cast, hyperutectic and forged. KB and speedpro make hyperutectics to the best of my knowledge. Maybe it's bull, but I heard someone somewhere say something about forged hyperutectics. Are the forged pistons KB and speedpro are referring to comparable to TRW forged pistons, or is this BS, sales gimmick? In other words, is a forged hyperutectic real, does it even exist?

 

TRW = SpeedPro = Federal Mogul

Laterzzzzzzzzzzzzzzzzzzzzz

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Matt

1987 GTA L98 MD8 GW6

"Stop Lights timed for 35Mph are also timed for 70Mph"

 

So I'll assume that speedpro forged pistons are comparable to TRW. I know there was a relationship between speedpro and FM, but not TRW.

 

there are no forged Hyperutetics. SP makes both HP and forgings.

 

Cool

 

Hypers are brittle, so if you are planning boost or happy gas, I would stick to forged, they tolerate the abuse better.

 

They are all the same Company. Federal Mogul is the parent company.

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Matt

1987 GTA L98 MD8 GW6

"Stop Lights timed for 35Mph are also timed for 70Mph"

 

I wouldn't worry about the hyperutectics...I'll only use them if I was building a N/A motor. Thanks for all you help, guys.

 

i have a set of 21cc dish TRW forged 350 std. bore pistons for sale. designed for supercharged or turbocharged engines.

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85 IROC 350 11:1keith blacks,.555lift erson roller cam,1.5 crane roller rockers,edelbrock intake,holley 4150 750dbl pumper, nitrous oxide,full length heddman headers,true dual exhaust, 11"stall converter, 700R4, 3.73 locker