l've got a ZZ4 motor in my 87 camaro, its got a 750 demon carb, now l know the ZZ4 comes with forged aluminum pistons (hypereutectics) is it safe to run any amount of nitrous through the ZZ4? has anyone ever done it successfully? any info or details would be greatly appreciated
thanks a lot

 

hypereutectics are not the same as forged aluminum. Forged aluminum is much stronger. I would not recommend anything over 150hp shot on hypereutectics.

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91 Camaro RS 5.0L Black Convertible 700R4
** Added so far **
*GM Wonderbar,Alston SFC's,spohn LCA's and Panhard rod
*Turbo City Inj Spacer
*Dual Snorkel Air Filter
*March Performance Pulleys
*GM 3.42 Gears with OEM Zexel POSI
*Edelbrock headers
*3" High Flow Cat
*3" Dynomax Exhaust
*Walbro 255 lph Fuel Pump
***Future 330hp Vortec Crate with LT4 hotcam and 454 TBI

 

oh ok, well l beleive the ZZ4 actually comes with forged aluminum pistons, correct me if l'm wrong. forged aluminum pistons can handle a decent amount of nitrous though, right?

 

Yes, forged pistons can handle more. However, I'm sure that the ZZ4 comes with Hypers. You should be fine with a 100 shot. Just dont run it lean.

Rob

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1987 IROC-Z Auto (LB9)
Black/grey interior with the stance of a streetfighter
I like to think of her as Arnold Schwartzeneger in a dinner suit

Mods
Custom exhaust. 4 Inch pipe from the headders all the way back to a single muffler at the rear. No Cat. K&Ns, AFPR and Air foil.

Future mods:
Cam change
New torque converter
New heads (maybe corvette L98)
Strut brace
Sub frame connectors
Ram Air

Current G-Tech times
0-60mph 6.26 seconds
1/4 14.74@100.2mph

 

ZZ4's don't have forged pistons. They have a forged crank, but the pistons are hyperutectics.

 

ok thanks, so the hypers should handle about 100-150 HP worth of juice, or is it best just to leave it at around 100?

 

I wouldn't temp fate...go with a 100 shot.

 

A 100 shot is what I would go for too.

 

I run a 250 shot on keith black hypers in my 383

 

well the pistons are designed for NA applicatons on the ZZ4 so I would do 100-150 shot. No big deal. it will hold up if you have it set up right.

if you want to go hardcore, pull the motor apart, use nitrous pistons, better rod bolts, and o-ring/reciever the block and heads

then strap the BIG shot on

Matt
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LS1, TH400, TNT 2 stage

 

I hope it will hold up I have 150 jets in and getting my bottle filled for the first time this weekend.

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1991 Z28 ZZ4 with LPE superram base, SLP runners, LPE 58mm T-body,Random Technology ramair,TES headers,24#svo injectors,ZEX nitrous,Walbro 255lph f-pump,Accel AFPR,Random Technology catback,!cats,and mutch more.