anyone out there running a 200+ shot on TRW forged pistons... i am building a 355 and wanna see if the pistons will take the shot i want to put on it

 

They will be able to handle it just fine, as long as your compression ratio is correct, and you dont have detonation. Even though forged pistons are strong, detonation will kill them as well, so keep an eye on that.

 

i was planning on running about 10.25:1 compression... and burning my own chips stuff with a buddy... so i will be able to keep detonation down

 

The pistons will handle it but with that much spray you want to make sure you have a really good set of piston rings.

 

get a set of the gapless piston rings i hear that those are great stuff

 

yeah but i have heard gapless rings are bad to use on a daily driven car... i would rather stay away from gapless... what rings would you suggest other than gapless?

 

I recommend against using gapless on blown or nitrous cars. I recommend TRW pistons. As far as gapless rings, I was told that pressure can build up between the top and second rings causing them to pressurize that area and 1) lock in the bore, 2) try to separate the top and bottom halves of the piston by ripping it in half. I didnt believe it and did what I wanted. you will notice the beggining of this phenomenon on the piston pictured. when holding the piston you can definitely see how the top of the piston is lifted even though the picture it is not really extremely visable due to the angle of the photo. TRW's are the toughest (albiet heaviest) off the shelf forged piston there is. some of the manufacturers can "build" you a tougher piston with special ring spacing but this piston is from a 13.6:1 compression 347 stroker on a ford that ran 9.30's running a NX 250 shot. this wasnt found until the end of season tear down. Leakdown testing was within specification.

 

well i always went witht he rule of 20-25 hp per cyl for nitrous if on a well built motor and/or big cube'd motor. but if stock a 100 is enough. BTW, i thought compression ration had nothing 2 do with how much nitrous u can run. as long as u have enough fuel it should be fine. BTW, i have some custom ROSS racing 10.39:1 comp forged (du'h) pistons in the 406...

 

You could get by with a file to fit speed pro ring as well.

Good luck.