Nitrous Oxide N20

35 shot. tune needed?

Old 05-23-2014, 12:48 AM
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35 shot. tune needed?

Found a good deal on a lightly used dynotune setup. Was thinking about running just a small 35 shot. Do I need to get retuned and pull some timing? Or should I be ok? Planning on spraying pre blower. Current mods are 2.8, 60s and zzp tune. Soon to have dual pass and option b as soon as my gaskets get here.
Old 05-23-2014, 07:33 AM
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Is it wet?
Old 05-23-2014, 08:21 AM
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when would you spray after the blower? And all nitrous should be tuned. Wet or dry. It's your risk of blowing **** up then.
Old 05-23-2014, 08:24 AM
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You can spray post blower too.
Old 05-23-2014, 08:33 AM
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interesting, either way, wet or dry, you should tune for nitrous.
Old 05-23-2014, 08:40 AM
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Post blower is going to be more of a direct shot.
Pre blowers is going to put the No2 into the SC and there are debates on if this is good for the rotor coating (same goes for meth). It is also said that it will cool IAT2 temps some as well.

Regardless, I have always used a minimum of two nozzles and had them postioned in a way that the no2 had a straight path into the cyliners. On an LSJ I would do post blower with a nozzle on the 1-2 side and another on the 3-4 so there is little risk of cyliner pooling.
Old 05-23-2014, 08:43 AM
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a lot of effort for just a 35 shot
Old 05-23-2014, 08:51 AM
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Originally Posted by redcobalt07
a lot of effort for just a 35 shot
Ive never bothered with a shot that small....
I am only giving my experience and my thoughts.

Personally, OP should run a 50 shot wet
Old 05-23-2014, 08:55 AM
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me either, I run a 100 wet shot on my g8 but I have timing pulled for it. I'd be real nervous running nitrous without a tune. Plus, these safe shots, would you even feel a 35 shot?
Old 05-23-2014, 09:05 AM
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a 100 shot on a v8 is like a 50 on a 4 cylinder.


A 35, I would imagine you would know, but not really feel it.
Old 05-23-2014, 09:07 AM
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I mean a 100 shot is plenty..for now at least. Knocks a solid .9 off in the 1/4
Old 05-23-2014, 09:51 AM
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Blackss you have any pics of your nitrous setup?
Ill be doing a 50 shot as well
Old 05-23-2014, 09:57 AM
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I don't think he actually has that done.
Old 05-23-2014, 10:47 AM
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I dont, not on this car.
Last car I had nitrous on was my sc2.
It blew up because shitty Saturn motor.
Old 05-23-2014, 10:48 AM
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nitrous on that kind of a saturn? wow
Old 05-23-2014, 10:53 AM
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Originally Posted by redcobalt07
nitrous on that kind of a saturn? wow
One of the motors was supercharged with a genIII eaton.
It blew up too.

Problem with doing any mofications to those cars was the shitty locked PCM. It was all very basic and not tunable. You had to rely on piggy backs, EIC's, or megasquirt SAEMS. But they were cheap, parts are plentiful, and the suspension I ran made it handle like it was on rails. It was quick on on the auto-x course.
Old 05-23-2014, 11:02 AM
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ive seen basic lsjs with gm stage 2 + 50shot do some work...not tuned for nitrous either..
Old 05-23-2014, 11:17 AM
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Originally Posted by jonathan923
ive seen basic lsjs with gm stage 2 + 50shot do some work...not tuned for nitrous either..
Ive also seen people all over this place say that OEM 42's can do a 2.8 pulley yet I was watching my car run 147% duty cycle on the OEM Stage 2 3.06" pulley.....
Old 05-23-2014, 11:19 AM
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Originally Posted by BlackSSstg2
Ive also seen people all over this place say that OEM 42's can do a 2.8 pulley yet I was watching my car run 147% duty cycle on the OEM Stage 2 3.06" pulley.....
with no cooling mods
Old 05-23-2014, 11:19 AM
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whats you afr at WOT?
Old 05-23-2014, 11:21 AM
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Originally Posted by BlackSSstg2
Ive also seen people all over this place say that OEM 42's can do a 2.8 pulley yet I was watching my car run 147% duty cycle on the OEM Stage 2 3.06" pulley.....
ppl near me want the OEM 42s to work with a 2.7
Old 05-23-2014, 11:23 AM
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Originally Posted by redcobalt07
with no cooling mods
With the car completely stock.

Originally Posted by jonathan923
whats you afr at WOT?
When the car was acting like that, the tune was the GM stage 2 flash. AFR at would was rich as GM likes, 10.2-10.4

Originally Posted by ECaulk
ppl near me want the OEM 42s to work with a 2.7
Ive seen it.... face palm

Last edited by blueLNFftw; 05-23-2014 at 11:23 AM. Reason: Automerged Doublepost
Old 05-23-2014, 11:39 AM
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Originally Posted by BlackSSstg2
Ive also seen people all over this place say that OEM 42's can do a 2.8 pulley yet I was watching my car run 147% duty cycle on the OEM Stage 2 3.06" pulley.....

did you have clogged injectors ?

u can adjusts the maf hrtz table and pull fuel out of it since your AFR was 10.0 ... that would drop your duty cycle.
Old 05-23-2014, 11:44 AM
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Originally Posted by yellowsupercharged06
did you have clogged injectors ?

u can adjusts the maf hrtz table and pull fuel out of it since your AFR was 10.0 ... that would drop your duty cycle.
No.

I did. I got it down to about 125% running a 11.5 AFR at WOT and tuning in the MAF. My whole point was that people do no think about altitudes when they say "GM tune can handle this" or "LSJ can do that." Just because some one or some people do it, doesn't mean its necessarily right for the car. I had people telling me that the duty cycle I was running was fine actually. It all comes down to know what your car is actually doing before you start tossing more stuff at it. Thats why I was logging my car OEM Stage 2.
Old 05-23-2014, 11:47 AM
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ahhhh ok lol .... thought u were headed back to tuning 101 for a min. lmao


your pretty much at sea level though dwn there in the sunshine state tho right ?

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