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pistons?

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Old May 3, 2007 | 04:19 PM
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355tpiz's Avatar
355tpiz
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From: columbus,ohio
Car: 1987 iroc z28
Engine: 355 vortec HSR
Transmission: T-5
Axle/Gears: 3.45
pistons?
Is there any way to tell what kind of pistons are in my 355 shortblock? I bought the engine awhile ago and the seller dident know anything about it. But everything looks real fresh, i would like to know before i consider nitrous
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Old May 3, 2007 | 05:01 PM
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jonmark1985's Avatar
jonmark1985
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From: Central Illinois
Car: 89' Pontiac Firebird
Engine: L03 carb Ported #87s new shortblock
Transmission: 700r4
Axle/Gears: 2.73 open
Re: pistons?
is they're any part number on the top of the pistons?
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Old May 3, 2007 | 05:16 PM
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355tpiz
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From: columbus,ohio
Car: 1987 iroc z28
Engine: 355 vortec HSR
Transmission: T-5
Axle/Gears: 3.45
Re: pistons?
theres no part number that i can see
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Old May 3, 2007 | 05:49 PM
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Pennocks91ws6
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From: alberta,canada
Car: 91 formula ws6
Engine: 1 peice roller scat 383 4 BOLT!!
Transmission: 5 speed
Axle/Gears: 3.42
Re: pistons?
maybe you can see a number on the inside of the pistons from the botom, if not pictures or removal of them are needed.
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Old May 3, 2007 | 07:11 PM
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jonmark1985's Avatar
jonmark1985
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From: Central Illinois
Car: 89' Pontiac Firebird
Engine: L03 carb Ported #87s new shortblock
Transmission: 700r4
Axle/Gears: 2.73 open
Re: pistons?
he doesn't have a receit for the machine work does he?
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Old May 3, 2007 | 07:52 PM
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355tpiz
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Joined: Nov 2005
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From: columbus,ohio
Car: 1987 iroc z28
Engine: 355 vortec HSR
Transmission: T-5
Axle/Gears: 3.45
Re: pistons?
I found a number inside the skirt of the piston it reads H
3497 99
Last edited by 355tpiz; May 3, 2007 at 07:53 PM. Reason: error
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Old May 3, 2007 | 08:25 PM
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355tpiz
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From: columbus,ohio
Car: 1987 iroc z28
Engine: 355 vortec HSR
Transmission: T-5
Axle/Gears: 3.45
Re: pistons?
I think i found them
http://www.kb-silvolite.com/spistons...tails&S_id=255

so are these decent pistons ?
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Old May 3, 2007 | 08:28 PM
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Apeiron's Avatar
Apeiron
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Posts: 20,981
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From: Mercedes Norte, Heredia, Costa Rica
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
Re: pistons?
They're budget hypereutectic rebuilder pistons. You could put a modest amount of spray on them if you were careful.
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Old May 3, 2007 | 08:29 PM
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Pennocks91ws6
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From: alberta,canada
Car: 91 formula ws6
Engine: 1 peice roller scat 383 4 BOLT!!
Transmission: 5 speed
Axle/Gears: 3.42
Re: pistons?
id say 100 shot max, and dont do it to often . they aint no forged pistons!
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Old May 3, 2007 | 09:29 PM
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355tpiz's Avatar
355tpiz
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Joined: Nov 2005
Posts: 20
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From: columbus,ohio
Car: 1987 iroc z28
Engine: 355 vortec HSR
Transmission: T-5
Axle/Gears: 3.45
Re: pistons?
So id probably be better off to not run nitrous.
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Old May 3, 2007 | 10:01 PM
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DIGGLER's Avatar
DIGGLER
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From: SC
Re: pistons?
they arent that bad.... you can run a 150 shot on them fairly safely. well, as long as you keep it tuned right.
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Old May 4, 2007 | 03:30 AM
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5678TA's Avatar
5678TA
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Joined: May 2006
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From: Maui, Hawaii
Car: 1984 Trans Am
Engine: broken 385sbc
Transmission: G-Force rebuilt T-5
Axle/Gears: Currie 9" Ford 4.30:1
Re: pistons?
150 max.. make sure it has nice ring gaps and the tune is spot on.. too rich or too lean will destroy those pistons..
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