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Old 02-22-2006, 12:21 PM
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Dished Forged piston and nitrius question?

Ok iam building a 377cid i have a 509 400 block and the parts too get are a cat 3.48 stroke crank with 400 mian (so i wont need main bearing spacers) and cat6.0 inch hbeam rods and i dont know about the bearings i was thing about king bearings. But the pistions are the biggest part to go for id like to have about 8:1 to 1 compresion ratio. But i plan on spray 2 to 3 stages of nos a 175 shot off the line and a fogger system in 2-3 gear. So my real question is what pistion should i get and what rings and bearings? Also should i get Wiseco, Je and Srp, Mahle, Ross pistons or any sugestions would be greatly apriceated. Oh and i forgot to mention later on when i feel the earge for more power id like the pistons to be suitable for forced induction with nos too.

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Old 02-22-2006, 01:54 PM
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Is this a strip only car or a street/strip?

My guess is you are choosing to run a low 8.1 CR for the later planned super charger?

If you are going to spray that much nitrous I would call JE or Ross and talk with them. They make a dedicated nitrous piston and can point you in the direction of the correct ring.

This is just my experience.... watch out for the CAT branded stuff. I would have a good machinist check it out before assembly.
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Old 02-22-2006, 01:58 PM
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Street and strip

Well ima take it out here and there on the street heh but iam shhoting for a good bottum end that is very versital. And thanks for your advice.
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Old 02-22-2006, 04:23 PM
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You better find your self a different crank before you run over the cat brand.
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Old 02-22-2006, 04:54 PM
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Get Eagle or Scat for the same money and more peace of mind.


Larry
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Old 02-22-2006, 07:38 PM
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The brand of pistons is a personal choice,the good ones usually cost more,but for nitrous,just make sure they are forged,and use chromemoly rings.

Go with a good brand name.
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Old 02-22-2006, 09:17 PM
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Definately go with an Eagle forged crank or Scat, I just built my 406 and used Speed Pro Hellfire rings, they are hardened steel for nitrous and blower applications, under extreme circumstances Moly rings can flake. They are not cheap though about $160 for a set.
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Old 02-22-2006, 11:01 PM
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Ok thanks guys for the replys. What do you think i should go with a 13:1 dome or about a *;1 or inbetween or what are your sugestions???
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Old 02-23-2006, 07:51 AM
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If it is going to see any street time at all I would stick with a 10.x ratio. If you go aluminum heads you can get away with 11.1.

As everyone else has stated....CAT stuff if not the best. Eagle or Scat would be much better suited.

If you planning on spraying it with 300+ of nitrous I would not buy just an ordinary forged piston......make a call to one of the major manufacturers and talk with them.

With that much GAS.. you better have your tune pretty close to dead on or BADS things will happen no matter what bottom end you have
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Old 02-23-2006, 10:08 AM
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Ok thanks guys for the replys and does anyone kow anything about Ohio Crankshaft products??
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Old 02-23-2006, 12:31 PM
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Along the same lines a Cat.


For a tadd bit more than a scat or Eagle brand crank you can get a Callies. You'll never break it. Even if you do you can find those who will repair it.
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Old 02-23-2006, 02:43 PM
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pistons

I've heard Mahle pistons are pretty tough they're a little more money but its probably worth it. I think they also come with a ceramic coating to help prevent detonation.
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