I might throw a new set of pistons and rods in while I have the engine out for the heads/cam swap.

What's a good, light, forged, piston.

and ringpack?

Motor will see 200+ of nitrous.

 

How often will it see the nitrous and how long of a rod are you buying?

 

Called Clayton and Cory recommended the CP Bullet series piston.

CP Bullet SBC Piston Set Features

* Set of sbc pistons balanced within 1 gram
* 2618 alloy for strength and durability
* Dual forced pin oilers
* Contact reduction grooves
* Accumulator groove
* Forged side relief
* FEA designed forging
* Tight tolerances
* Same manufacturing process as CP Pistons
* Rigorous quality control
* ISO 9000 certified

The CP weighed 407g.

Im looking at a wiseco piston that looks like it would do the trick:

K413X3

only 347g
• Radiused Valve Pocket.
• Skirt design allows for as little as .004"
clearance with excellent wear properties.
• Anti-detonation Grooves help keep the top
ring groove free of carbon.
• Pressure Groove for enhanced ring seal.
• Features Chrome Moly Pins and Spirolox®.
• ArmorGlide™ Skirt Coating.
• Taking the XLS Series a step further,
the GFX ring package and gas
ports reduce friction for noticeable
increases in power.
• Extra deep valve pockets and a
thicker deck allow for higher horsepower,
bigger cams, and more
radically milled heads.
• Skirt coated for lower friction,
reduced noise, and superior life.

The CP has 1.5 mm 1.5 mm 3.0 mm rings.

Wiseco is 1.2 1.2 3.0

Wiseco has several pistons with even thinner / less friction rings but at 200hp nitrous I'm not so sure that would be the best.

 

200+ Everytime to the track or street racing.

6" rod

 

mahle is what i would get

 

diamond total seal rings

 

Why.?

 

Cp and 6" rod fo sho

 

I run the CP pistons and ring pack. I strongley suggest them that and IF you were to have a failure CP sells them individually. They are made out of 2618 which tends to be a lot less brittle then the 4032 mahle or srp piston, making them more reliable on a large shot.

When I built my motor I talked to both companies, mahle saying they felt uncomfortable with anything more then 150 shot being put to their power pack product, and CP saying
"thats it" when asking them about a 200-250 shot. They are very confident in their product and the quality and consistancy in them were great.

Its nice to have a reasonably priced 2618 piston rather then going to a JE.

I also run the compstar H beams. But with your app. Id suggest scats 6" I beams with 7/16s bolts. They're reasonably light and extremely strong. Also whats in Ed Wrights 9 sec. 383.

 

check and see if you like them for a .030 bore diamond part number 29011

 

i dont think they recommend any of their piston for anything over a 200 or close.

 

the machine shop i used told me they were the way to go for the nitrous.

 

my machinist called them before i ordered my je's and that's what they told him.

 

i sprayed 175 to stock pistons for 5 years so why cant a forged piston take it? Its all in the tune up!

 

I've been spraying 175 on the stock pistons as well. But Im thinking about forging it while its out.

I've been looking at what Diamond has as well. So far I like the Wiseco piston the best.

Who knows what a stock piston weighs?

 

Diamond rings? What kind of piston did you use?

 

no sir, those are diamond pistons that i have from my last motor. i had hell fire rings. you can call diamond and get all the specs. they said those pistons would take a 300 without issue. if you want them i live about 3 miles from hpc coatings also

 

same thing i was thinking. i had 150 on mine with the stock fuel system leaning it out pretty bad im sure lol

 

According to this thread the stock piston weight is 532g.

The wisecos would be uber way lighter than the stock stuff...

 

Care to post the SCAT part number?