a progressive tuner is better,
I'd look on line for a good one
I don't have any good recommendations,
as to who's is any good now
take a lil' timing out at a time, as it goes down the track
manage the bottle pressure too, run it at a constant like 900psi
highs & lows will mess with the hp & the accuracy' or effeciancy of the tune
to be repeatable
don't/won't kill so much power down low,
running like 20*-24*s of timing because you're runing 300 shot of N2O
taking all 12* out at the hit, does work but not as well
as the more N2O is added
(I've been out of it for a while now, used to run it quite a bit,
I ran 3 kits a 150-300hp (depending on track prep) plate kit under the carbs used at the launch,
release of the transbrake button
a 300-500hp spraybar kit plumbed & epoxied inside the manifold, much like a plate kit but more flow
& closer to the tops of the runners
& a 350-500hp port kit (generic named Fogger an NOS co. term)
down on the bottom of the intake aimed at the centerline of the intake valve
most 'full passes on fully prepped tracks'
take out about 2-3* of timing going down track
for every 100-150hp of N2O added,
thru a progressive timer
some 3 full N2O kits
ranging from 800hp total to 1300hp total, when I used all 3
some places I could only use 1 or 2 maybe
I never lifted
an intake top or had a failure, backfire because of N2O tune
by the time I got down track, I started out at like 34*-36* total,
I was at like 12*-16*s total crossing the stripe 1320 or 660 on 1/8th mile
It worked well for what we had back then
ran best of 6.69 @ 217 1/4 mile, Sears Point IIRC a mild 526cid T/S combo
back in early 2000's , run in the 4.20's in 1/8 mile like 178-185mph-ish
talk to an expert that's up on it, "the current technology"
don't build/tune by committee
the technology is constantly changing
make sure to run a dedicated pump/s & bypass/s style regulator (multiple if neccessary),
adiquate for your HP & needs for the N2O,
seperate from the fuel system, that you run for the engine EFI or carbs
I'd also look into & running really good quality solinoids,
don't be cheap/not there
(
I used Powerdyne not sure they are even still in business, best closed pressures
& best seats to stay closed at the time I was using them)
if one hangs open (or closed) it can be dramitic (especially open)
& very expensive to say the least,
It's also mandatory to have good battery power
'constantly' too
fluxuations in any of them can be really
BAD
good luck
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