**** i wish i was you guys, im paying $9.50/lb

 

I looked at it like the power of a turbo with the powerband of a SC.


Also a question for the experts. On street tires would a 75 shot hurt for traction in 2nd? Wondering id a 50-60 shot would would actually be quicker.

 

depends on the pavement. as long as you are not running some garbage tires you shouldn't have traction issues

 

I'm actually on the stock tires. Getting some new ones at the end of the year, they aren't in too bad of shape.

 

Got a window switch? If so just program not to spray in first and spray 75shot at like 4-5k in 2nd..should have traction and keep by then

 

I haven't bought the kit yet. Is it able to program rpm in each gear? Anybody try one of those "progressive" controllers?

 

Exactly, then when the twin charged people cry about their IATs and have to use meth anyway....


Filling a bottle isnt exactly hard either.

 

Never knew there was a progressive controller. But the window switch can allow you to program what gear the nitrous sprays, turns on and turns off. Mine is set to spray in 2nd,3rd, 4th and 5th gear at 3500rpm and turn off at 7400. Rev limit is 7500rpm for now. Not spraying in 1st or 6th...1st obviously ill get no traction and 6th...well ill never need it in 6th...same with 5th but have it on just incase.

 

What window switch are you using?

Progressive controllers are neat, but they are really hard on the solenoids. They 'pulse' them like an injector until they get to 100%, at which point they just keep them open normally. Good for racing and if you are using big noids, but it will fry the smaller noids used by most people on basic street setups with regular use.

 

This is the type of thing I'm talking about. Haven't checked into it at all to see if the nitrous has to be in stages/etc. Anyways so when you shift nitrous sprays as soon as you hit the gas..is it a smooth transition?

http://www.amazon.com/gp/product/B00...YRY8G2ANN969KX

 

It won't come back on until you step down on the pedal again (assuming you have a WOT switch), and as long as you're on a reasonable shot it's not violent. My dad's truck on a 100 shot is noticable, it's a solid amount of power when the system activates at 3200rpms, but it's nothing crazy.

I get the feeling my Z on a 150 is gonna be slightly nuttier...

 

I havent used my nitrous yet so im not sure how its going to feel changing gears, should be smooth though since its only a 100 shot.

And im using the Zex TC Window Switch.

 

i can see a 75 shot being good but is a 100 shot still gaining you hp or just more trq at that point?

like a 125 or a 150 is not gonna get you 150 hp will it?

i only have experience with a 50 shot which felt really good, i upped it to a 75 and it was bearly even faster.


im trying to get some input cause my block is sleeved and forged and im looking to spray 100 shot i dont think anything bigger would work out any better than 100 shot.

also im looking to do it in 2 stages 50 and 50. right now i have a NOS SNIPER KIT with bottle heater and pressure switch. I will be using the wot box as my rpm window switch. i'll be running a 75 till i get my "add a stage" kit from dynotune

I have a 6 puck clutch, axles, motor mounts and slicks already from my turbo and twincharge builds.

 

Nitrous packs more air/fuel into a given space. Chemical intercooling. So if you peak at enough airflow for 400hp normally, nitrous could get you another 400hp at the same airflow with no problems, assuming the engine can handle the power.

 

ahh, so a 75 + 75 would get me close to 400 again?

the only weak link i have as far as a nitrous motor goes is the stock rods and the F35.

i got springs and nbs as well as CAI and shorty hdr and 3" catless with 3" exh. im on a 3.25 pulley i have 2.8 but i think it will only create more drag and heat cause my cooling system is still stock.



is there anything else i need to do to optimize the nitrous set-up?

bigger fuel pump maybe? or will the stock flow enough for a 150 shot. it was enough for my lsj turbo making 400whp. does that mean it will be fine for the nitrous fuel requirements too?

i was kinda thinking about do a fuel cell and external pump for the nitrous fuel supply. that way i can run RG and not waste it while not spraying. is that a good idea? or not worth it?

like use this pump that is activated by the arming switch? http://www.summitracing.com/parts/ZEX-82020/?rtype=10 this ones cheaper http://www.summitracing.com/parts/SUM-G3138/?rtype=10

and this fuel cell http://www.summitracing.com/parts/RCI-1031C/?rtype=10

would the fuel pump turn off when reach a certian pressure or how would i regulate that?

 

Nitrous acts as a cooling also so a 2.8 would work, personally i would go to a 2.9 if i was using nitrous on the balt. What italionjoe said is correct. Also to add to that, when you had a 50shot and added another 25 to make 75, not only do you have to keep in mine the AFR but also keep in mine the drivetrain loss. Just like adding bolt-ons, the power goes through the drivetrain. Just like im sitting at 280whp without the nitrous, im adding a 100shot so ill probably get 360-370whp

And your gonna wanna upgrade your fuel pump or get a return style fuel system. Correct me if im wrong gents, but the cobalt has issues with fuel presure as is, using 150 shot will require a fuel pump upgrade.

 

Yeah, fuel pressure at the rail might be an issue at a big shot level on the Cobalt.

I like the separate pump/cell/race gas idea, you'd have to have some sort of regulator on the second pump, you could also run it much higher pressure for a quicker response (nitrous is appx 1000 psi, so it moves through the lines much faster than the fuel, can cause a lean spike on activation if the fuel line is long), or run it at a very low pressure and have a ton of capacity at the pump (higher pressure means more work to move the same amount of fuel).

 

205/200/210/210

those are my compression numbers @ 47k miles on my 07 cobalt ss/sc spraying a 75shot

and old video since i haven't taken video's in forever http://www.youtube.com/watch?v=ZXNkcDJvJcc

**Current pictures taken February 5th, 2010**



**with out lower grille in these pictures below**



**picture below with the stock headlights**



60's, 2.80, cx h/e, cia header, cia 3" dp catless, stock cat back, 3" intake, ls4 throttle body, 75wet shot. in the above video it didn't have the 3" intake or ls4 tb

 

for those of you that already have nitrous, what is a safe-ish shot to run without tuning. I wanna just test out the system to make sure everything is working before i go get it tuned. I'm thinking a 30 shot? if the jets can even go that small

 

just go 50 shot. it wont hurt anything on that big v6

 

i ran gm stage 2, 2.80, airbox mod, cx h/e, 45wet shot (nos sniper kit), i ran that for a decent amount of miles and a couple bottles through it. haha ran fine for me. i'm at 47k miles now with a 75wet shot almost the same mod's just added a header/dp and ls4tb and 3" intake.

in my eyes the gm stg2 + 2.8 + 45wet shot ran the best for me w/o any problems or engine codes or anything. my compression numbers to date are 205/200/210/210 @ 47k miles on a 07 ss/sc. when i was gm stg2 + 2.8 + 45wet shot i was un-tuned just running the gm stage 2 tune. also the jets were 36nitrous i think and 22 fuel i think. i ran the fuel jet richer.

45shot dyno pull- http://www.streetfire.net/video/coba...jet_645209.htm
13.4 with gm stg2 + 45shot (street tires w/o bottle warmer on)- http://www.streetfire.net/video/coba...ssc_643894.htm

~Difference between gm stg2 with 45shot and w/o 45shot~
cobalt gm stg2 w/o nitrous- http://www.streetfire.net/video/no-n...evy_643889.htm
cobalt gm stg2 + 45shot- http://www.streetfire.net/video/nitr...hev_643890.htm

75shot vs gto(my car tuned but canned tune running 10.0 afr- http://www.streetfire.net/video/2006...ssc_649700.htm

 

Whats up Cboner...

 

I been lurking in this thread since it started. Lots of good information in this thread. This should be a sticky.

Anyways, I'm running a 55 shot on my SS/SC. The last time I trying spraying it was on the dyno. The n2o noid wasn't working, so I need to figure that out.

On a side note, I just realized I need to hurry up and rebuild the engine. My compression on all 4 cylinders is running no higher than 190. This wasn't caused by nitrous.

 

I've looked at all those vids before minus the last with the GTO. What did you trap/dyno on the 75?

 

You caught that 2 huh