View Full Version : To Spray or Not to Spray


bigboy576103
11-13-2009, 12:11 PM
Hey i just got done installing all my nitrous stuff and was wanting to go play this weekend but some guys was telling me that i need to wait and put it on a dyno to make sure everything is gonna be safe.

I dont ahve a wideband or anything to tell me my A/F ratio so that kinda concerns me, but i put colder plugs and pulling timing 6 deg on a 150 shot..

Would i be ok to go out and make a few passes this weekend???

custm2500
11-14-2009, 07:49 AM
It will be safe. What is a good idea though is to make a few passes and read the plugs. They will tell you if you are lean or rich. Obviously listen for knock but with the steps you have taken I am confident you are on the safe side. Very few people(almost no one), dynos there car after installing nitrous only.

bigboy576103
11-14-2009, 07:57 AM
ok cool it wouldnt be so bad if i had a damn wideband..lol...

custm2500
11-14-2009, 08:06 AM
To do all the extras in good and dandy. But when running nitrous it quickly becomes VERY costly if you get crazy with dyno, wide band, 10 controllers for timing, and safety shutdown. If I am going to do all of that I am going to spend $10 more and turbo charge or super charge and make power all the time.

It also becomes scary if you starting listening to all the idiots who know nothing about it but all want to offer you advice.

streetassasin
11-14-2009, 08:10 AM
I wouldnt run a 150 without at least getting the afr checked, x2 on it being expensive I have between $1800-$2000 in my set up

custm2500
11-14-2009, 08:13 AM
I wouldnt run a 150 without at least getting the afr checked, x2 on it being expensive I have between $1800-$2000 in my set up

For me that is foolish. For nearly $2000 you can almost turbo and make power all day long. Everyone has there own ideas but it just doesn't make sence unless you are running 2-3 stages with a tottal output of 400-500 hp.

streetassasin
11-14-2009, 08:24 AM
find me a compete front mount turbo kit for $2k and Ill buy it right now and Im hoping for 550-600rwhp through a stalled auto, its going to be a ticking time bomb :jest:. Maybe I worded it wrong, I didnt spend that much but thats what it would have cost if I bought everything brand new

bigboy576103
11-14-2009, 09:58 AM
I appreciate the suggestions and i think what i might do is make a short run on a extra safe setup like you said and pull a plug and see how i looks.. what yall think?

my controller has a a/f lean/rich cutoff switch in it that i can set wherever i need it to shutdown at but no wideband to hook up to it..lol

custm2500
11-14-2009, 11:54 AM
find me a compete front mount turbo kit for $2k and Ill buy it right now and Im hoping for 550-600rwhp through a stalled auto, its going to be a ticking time bomb :jest:. Maybe I worded it wrong, I didnt spend that much but thats what it would have cost if I bought everything brand new

As you know I am good for used parts to save money! I know it is more than $2000 to turbo but I bet you can do it for $2500-$3000. So if you pay $2000 for all new parts then run 15 bottles through it at $4 a pound you are pushing 3 grand. Anyhow back to the original point.

Sounds like you get the idea. If you want to be really carefull to start take you fuel jet up one size from what you calculated, run it a few times see how it looks then pull fuel out or add some more juice.

mitch cobb racing
11-14-2009, 12:56 PM
i think you already know what i think... :) haha

LoudGM
11-14-2009, 06:52 PM
Just wait till you check the A/F.......better safe than sorry right?? (:

FBODYMAROZ28
11-16-2009, 01:56 AM
Check af!

Nick@HSW
11-16-2009, 10:59 AM
I always recommend getting it on the dyno at least once to verify everything is functioning properly and that you have a nice consistent a/f. Nothing worse than spraying a car that a)the pump can't keep up or b)the regulator has issues. Not saying that your particular set up will, just that things happen.

Nick

Ryan_Z28
11-17-2009, 10:05 AM
as others have said its always best to be tuned on the dyno...DEPENDING on the tune you are currently running the 6 degree's you pulled MAY be enough timing...I know alotta people say on a factory tune for an f-bdoy a 150 is approaching the limits of safety. I personally when I first used my kit ran a 100 shot on the stock tune and started with the rich fuel jet for the 100 and read the plugs. So if you cant wait to be tuned to spray I would suggest starting off at the 100 mark a little on the rich side and look at the plugs for tell tale signs of a lean condition, worst case situation is you'll run rich and not make max power but your motor will live through it.