the pistons in the ZZ4 motor are hypereutectic, and I've heard quite a bit about nitrous and hypereutectics, but has anyone had any experience with running nitrous and hypers? my brother's car has an excellent high performance fuel pump, and a good HEI ignition system, the intake system is carbureted, with a 750 race demon, and and edelbrock performer dual plane manifold. the motor runs really well. I've got a 90 IROC Z with a 305 TPI, Ive been running nitrous on it since december, atleast 12 or 13 bottles so far, at 150 HP rate, my car honestly has never run better. my question is can 150 HP if wisely used, checked, and maintained, be used on hypereutectics, or is that just too much? and how does the fuel enrichment work with a carburetor? is it a fuel spray bar, and where does the extra fuel come from?

thanks a lot in advance

 

my motor has hyperu's,

check sig

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1991 Firebird
350 L98 (was a 305 TBI)
T-5 transmission
Edelbrock TES and cat back
Accel manifold
NOS
subframes
jegster torque arm
MSD Digital 6
AFPR
Lakewood lcas
Hurst linelock
SLP cam (206 212 .480 .486)
relocated battery
cold air
Hypertech chip
centerforce df clutch
poly bushings and mounts
AFR 190s
Harland sharp 1.5 rockers
a/f gauge
autopower rollbar

12.44 @ 114.63 juiced uncorrected

13.549 @ 102 non juiced uncorrected

 

hey, thanks a lot, thats the kind of info lm looking for, l'm assuming since the nitrous knocked off more than a full second, youre running 150, right?