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Thread: Which nitrous pistons?
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02-23-2017, 01:22 AM #1
Which nitrous pistons?
It's time to order some some pistons. Building a 355 with stock crank, forged eagle I beam rods (5.7), and forged pistons. But which pistons is the question. The plan is to spray a 150 shot (for now) with the direct port wet kit I currently have. After doing a LOT of reading I was set on forged SRP professional pistons, but I'm not sure if they are the best for nitrous. Also looked into Wiesco and Ross as well. All are relatively close in price so just trying figure out which ones to go with. Any advice would be greatly appreciated.
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02-23-2017, 07:45 AM #2Xtreme Member
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Supporting Member2021 Charger Scat 392
1994 Firebird Formula 381 stroker - Carrying the torch! - 9.90 @ 134.3mph on a 200 shot
The wrench/driver for LTConvert's 94 Z28- Ellwein 383/LE Trickflows/ D1SC / CPT Ultra Pro Race 4L60E
10.78 @ 125mph. Shooting for 9.99 for Frank Cahall!
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02-23-2017, 10:57 AM #3LTx Guru
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You don't want to push the wrist pin too high on a nitrous piston. Typically, they drop the ring pack down on a nitrous piston, to avoid the intense combustion temperatures and to strengthen the piston crown above the top ring, the wrist pin is into the oil ring. You can add ring rails - I have them with 5.85" rods on a 3.75" stroke - but why press the issue. I'd stay with a 5.85" rod. I run BME 2618-T61 pistons, but you don't need or want those for a 150-shot, mostly street-driven application. 4032 is a decent choice, and Wiseco or Mahle are good.
SOLD - GONE TO A (VERY) GOOD HOME ! - 94 Formula A3+1: 381ci forged stroker - Callies Stealth, Oliver 5.85 billet rods, BME nitrous pistons / CNC LT4 heads / CC solid roller / TH400+GearVendors OD / 4.11 Strange 12-bolt / 300-shot N2O / Spohn Suspension / roll bar / MoTeC M48 Pro engine management system /a few other odds 'n ends.
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The Following User Says Thank You to Injuneer For This Post:
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02-23-2017, 01:39 PM #4
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02-23-2017, 01:41 PM #5
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02-23-2017, 05:15 PM #6
I'm running cp bullet pistons. There nice off shelf piston. I'm running 6in rods in my 355 as well.
94 trans am forged 355, le 21* trickflows, le cam, a4 3800 stall
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02-24-2017, 11:50 AM #7
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02-24-2017, 05:45 PM #8
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02-24-2017, 08:47 PM #9
I'm running the one for 3.5 stroke. Yes spraying them with 200 so far.
94 trans am forged 355, le 21* trickflows, le cam, a4 3800 stall
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02-25-2017, 12:37 AM #10
Awesome, so they work with a 6in rod and 3.480 crank?
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