alky & nitrous

[tom j]

I have razors kit and will be tuning the car with t-pro and wideband. What method should be used? Do you use a wet shot with the alky or dry? If you use a wet shot do you use the alky for the wet portion if so what is the aplication that should be used? How would you now how much alky to use on top of the normal tune or just use fuel for the wet portion also what about just running it richer via the t-pro

 

[Razor]

Tune the car on pump alky first.

Then roll in the nitrous. Start on a low shot and get that dialed in. You will need to figure out what meth pressure your running so you can calculate jet size for methanol. Then you can "T" of the main line and run alky/nitrous wet.

But your tuneup has to be dead on nuts before getting into the nitrous stuff.

On my car I used my correction to setup my meth jetting with the nitrous.. if I do a pass and its adding fuel to get the target AF.. then I bump up the meth jet until its back to zero correction.

HTH

 

[neat]

That's trick man, I hadn't thought of using Meth instead of gasoline for the wet side of the kit.

Let us know what you come up with!

 

[Syclone0044]

Wouldn't you need a alcohol-specific solenoid to use alcohol for the wet portion? With such small shots (35-50HP) would there be much difference between running a traditional wet gasoline side, versus an alcohol wet side?

Great info!!! :biggrin:

 

[Razor]

Its all about octane. You can use fuel.. but methanol has better octane. So thats a decision you can make. Just like running higher boost on fuel.. you make decisions to get to your means.

Almost all the nitrous vendors sell meth compatible solenoids.. non-issue.

 

[tom j]

What about the boost setting, say I am running 22lbs and tunned well do I leave it there assuming it is going to jump or does the fuel corection /nitrious/more alky cover this problem

 

[Razor]

If your boost controller does its job, boost will stay the same. If it doesnt.. it will jump to ???

If your on a speed density system, it will add more fuel as the boost increases, just like it will add more alky as the boost increases.. so if the boost jumps up.. you should be ok as long as the jetting is correct.

HTH

 

[yullose]

The nitrous kit I threw together for my T-type just pulled fuel off the schrader fitting in the fuel rail.
Monitoring with a WB O2 sensor on a chassis dyno, I noticed the O2's were very similar to a non-nitrous tune due to the fact that as boost increased, so did the fuel pressure.

I might even have a dyno graph somewhere in this laptop showing both on/off nitrous O2 readings...

If I find it, I'll update later.

Edit to add:
Here ya go... The first run was no nitrous, the 2nd run was with nitrous.
You can see it initially dip way rich, then settle out as the nitrous caught up to the fuel. (Probably as a result of not purging the nitrous line.)

 

[PaCemkr86]

so what target a/f do you shoot for? 11.5 11.8 ??