2013 nitrous question

[Neal@]

We recommend that spark plug reading done at any shot. A true spark reading would be doing one blast on a brand new plug, immediately killing the car and pulling the plugs with out idling, then reading the strap for timing and porcelain for the fuel ring. Idling for as little as 10 seconds can wash a plug reading out. The fuel ring would be down at the bottom of the porcelain and usually requires cutting the plug apart to read it correctly. If done correctly this is the best way to tune and can tell you more than any wideband could ever tell you. Its something that you can learn for sure. Nothing to hard once you learn how to read plugs.

Honestly if you want the most out of nitrous and be safe read the spark plugs or just throw it on the dyno and have a reputable shop or tuner tune the car.

Even at 100 hp jetting we have seen mail order tunes just be way out of the ball park. We have seen timing just be so pulled out that the car make an extra 20-60 hp when tuned right.

 

[sixohtofiveoh]

You should be fine motor wise with a 100 shot, I've got the Nitrous Outlet Plate Kit Brisk plugs, JLT, BBR catless x and a Magnaflow exhaust on my car. Its drank about 10 bottles with no hiccups MOTOR wise. However I toasted the MT82, and the clutch was glazed really bad. The car went to the track twice a month for 4 months spraying it right off the line. Car went 1.6x 60's, 7.4 1/8th at 98.7.

 

[rubicon79]

Well I made the plunge to nitrous on my 13 yesterday. The intake is on but still waiting on the bottle and some other things to get here. It'll probably be a few weeks until everything is sorted out and I'm ready to spray it. Right now it's jetted around 160hp or so.

Before



During



After!



Thanks to Chris at HPX motorsports on working with me.

 

[Fastnature]

damn that is crazy looking. let us know how it works out

 

[RSKtakR]

I had a Nitrous Express wet kit on my 2011 GT, never shot it though. Decided to sell in favor of the dry JMS kit, and that kit will be going on my Boss. If I remember correctly its not a big deal to spray a 75-100 shot without a tune. If I can spray the 100 dry shot without a tune (other than the track key tune), I will for SURE run it. (I dont want to change my tune at all.)

 

[Clipboard]

looks like medusas head if you painted that green n black

 

[rubicon79]

It's my understanding you must run a tune with nitrous. All the tune is doing is pulling timing though. Something like 1.5-2 degrees per 50hp of nitrous thereabouts seems to be the general consensus. I will also be running one step colder plug.

 

[Neal@]

It's my understanding you must run a tune with nitrous. All the tune is doing is pulling timing though. Something like 1.5-2 degrees per 50hp of nitrous thereabouts seems to be the general consensus. I will also be running one step colder plug.

2 degrees of timing pulled is the rule of thumb for nitrous. Sometime it might require more timing got be pulled and sometime you can add back in some timing.

 

[Seer]

run 100 octane and only pull 2-3* or so for a 150 shot, problem solved

 

[rubicon79]

The problem I have now is the smallest nitrous shot I can run is around 160 since the fuel jet would be too small to use any less. Running 60 psi of fuel pressure with a direct port means tiny fuel jets altogether. I've been thinking of doing a dedicated fuel system for the nitrous. Has anyone done this yet? I could fill it with c16 to help a little on the fuel side too. Would a 1 gallon tank be enough? I'd like to be able to run 5.5 lbs of fuel pressure to increase my tuning options with fuel jets.

 

[Neal@]

yeah its hard to run small shots on a direct port with 60 psi. We have a lot of customers running direct ports with dedicated fuel systems. One reason is to run low pressure, which in turns allows you to fine tune your tune with fuel pressure on the dedicated.

Second reason to run a dedicated on a direct port is that you run a larger orifice jet on the fuel, making it less of a chance that a contaminate jet stuck in the jet.

 

[Need4Speed12]

Not only should you pull timing with nitrous, but the commanded A/F in the tune should be changed. Im running a BBR nitrous tune with the a 100 shot NX plate kit. My nitrous tune has 17 degrees total timing and a commanded A/F of 11.5. I have been 10.85 at 126 with a 1.55 60ft on drag radials. When Im not planning to spray I have my BBR N/A tune loaded which has upwards of 29 degrees of timing and an A/F of 12.15

 

[Neal@]

Not only should you pull timing with nitrous, but the commanded A/F in the tune should be changed. Im running a BBR nitrous tune with the a 100 shot NX plate kit. My nitrous tune has 17 degrees total timing and a commanded A/F of 11.5. I have been 10.85 at 126 with a 1.55 60ft on drag radials. When Im not planning to spray I have my BBR N/A tune loaded which has upwards of 29 degrees of timing and an A/F of 12.15

17 degrees of total timing! wow thats a ton of timing pulled out of that car for a 100 shot. Im pretty sure you could get some timing back in that tune and pick up some horsepower.

If i were you i would put a fresh set of plugs in and do a quick blast and see if you have a timing mark on the plug. Its probably got so much timing pulled that you wouldn't even have a timing mark on the plug. I would love to get that tune dialed in. It sounds like you have some power left on the table.

 

[Seer]

17 degrees of total timing! wow thats a ton of timing pulled out of that car for a 100 shot. Im pretty sure you could get some timing back in that tune and pick up some horsepower.

If i were you i would put a fresh set of plugs in and do a quick blast and see if you have a timing mark on the plug. Its probably got so much timing pulled that you wouldn't even have a timing mark on the plug. I would love to get that tune dialed in. It sounds like you have some power left on the table.

Wow, you're right thats a ton.

 

[Neal@]

Wow, you're right thats a ton.

Its very common in mail order tunes. They have to stay safe but man there is a lot left in that tune. They could have probably pulled half that and still be safe.

 

[Seer]

Its very common in mail order tunes. They have to stay safe but man there is a lot left in that tune. They could have probably pulled half that and still be safe.

when I had my old nitrous setup tuned it was a mail order. It was 1 degree per 25 shot pulled.

 

[Neal@]

when I had my old nitrous setup tuned it was a mail order. It was 1 degree per 25 shot pulled.

Yeah that is the rule of thumb and usually is pretty safe. Sometimes you can even add some timing back in from that rule.

We tune our shop car and customer cars by plug. All you need to know, AFR, Timing, and Heat

 

[Seer]

Yeah that is the rule of thumb and usually is pretty safe. Sometimes you can even add some timing back in from that rule.

We tune our shop car and customer cars by plug. All you need to know, AFR, Timing, and Heat

Ya, typically the first 50 shot can negate the need for timing being pulled by the cooling factor of nitrous. Although in the end, cylinder temps are still higher.

I typically don't ignore the first 50, unless I'm running 100 octane or so.

 

[Need4Speed12]

17 degrees of total timing! wow thats a ton of timing pulled out of that car for a 100 shot. Im pretty sure you could get some timing back in that tune and pick up some horsepower.

If i were you i would put a fresh set of plugs in and do a quick blast and see if you have a timing mark on the plug. Its probably got so much timing pulled that you wouldn't even have a timing mark on the plug. I would love to get that tune dialed in. It sounds like you have some power left on the table.

My tuner said that these coyote engines on nitrous love the timing pulled. I questioned it and he said they absolutely love it and that adding timing back in would probably not improve power by much if any. I also like the fact that its ultra safe. Im extremely happy that with my light mods I ran the times I did on 100 shot, and also on the little 26" drag radials.

I didnt mention that the tune was written for a 150 shot, but I havent sprayed 150 yet. First time to the track I wanted to get some clean passes with the 100 jets first. Will have some times with the 150 jets in the next few weeks.

 

[stratman]

So a 75 shot of dry safe without a tune?