okay i am at 180 wheel hp now

i am going to add a stillen supercharger with the stock pulley

so lets say that puts me at 240 hp (i think that is correct?)

next im going to put a 5124 NOS kit in. im not sure what size jets it is but it is equal to a 60 shot.

my goal is 300 hp wheel wise.

180 stock + 60 hp blower + 60 shot NOS = 300 ???

im not worried about tq right now cause that will only confuse the situtation even more. it seems like blowers barely add tq and nos adds more tq than hp. i figure if i have the hp the tq will come.

obviously one step colder plugs is a must.

could i bump it up to a 70 shot safely?

any input welcome.

 

Just wondering why don't you just save the money and run a smaller pulley on the S/C instead? You could use the money saved to dyno tune your car...

LEMAR

 

I would have to agree with the above quote. I can see adding the NOS for insane HP (ala MardiGras) but if your looking to go from 240 to 300, I would say drop down to a 3.25 and get the VI... You should be 300+ FWHP. If your insistent on the gobs of Torque available from the NOS (that's the only real reason I can see to go that route on the stock SC pulley) then go for it, but tuning it may prove to be somewhat difficult because of the FMU and the already high Fuel Pressures that you will be running on boost alone.

So go for the SC, and drop it down a few pulley sizes, get the VI, and go from there. If you really need the torque, or want to use the NOS as a chill down factor in your intake charge, it is totally understandable, start small, 40 shot, and tune it in on a Dyno, I know Bosco had a hell of a time tuning his setup in.

Personally I chose the smaller pulley route. Torque is nice, and the ability to flip a switch and pull that much harder is nice, but I like consistency, therefore, 2.87, VIM, and J&S was my ultimate choice.

 

WOW, you must've spent a LOT of time on the dyno, a 2.87 is a VERY small pulley size

 

No not really, the car is a work in progress, I never drive it, so I don't have to worry about blowing it up.

LOL!

 

I agree with the smaller pulley deal Even though im running a very small nitrous express shot with the supercharger if you just want 300fwhp you will accomplish that much easier by just going with the smaller pulley. But good luck either route you choose.
Boost + Juice =

 

hmmmm i see said the blind man.

 

PM Mardigras

 

Yup

 

Carl- are you just concerned with ouput numbers? or how well the car runs?

And you and I both know the stock pulley is a waste.

Step up to the 10 psi pulley, then do a 40 shot that is set up from like 2300-5000 rpm.. then that way when the nitrous hits you get the TQ and spool your SC. When your near redline you'll have the HP. and if you cap it at 5000 rpm there will be no chance of the big boom theroy

My 2 cents

 

well i was trying to do a different set up than the average. but i read everyones posts and will follow suit. probably.

 

With my Auto + 3.25" pulley + VIM, I'm at 277.

Figuring out 10% difference between a Auto and 5spd maxima at the wheels, a 5spd with those mods should be at 302hp.

IanS

 

The problem with running NOS with a s/c is fuel pressure. I'm running a 30 shot with a 3.125" pulley. You need atleast 60 psi f.p. boosting to spray a 30 shot (and not detonate). The problem is, if your boosting 12 pounds with a 8:1 FMU disk, that means at 6500 RPM your pushing ~136 psi of f.p. (blown engine). So if you drop it down to a 6:1 FMU disk, at 6500 RPM you'll be pushing 112 psi. This is a lot safer than 136. The only problem is, you cant spray your nos until 3500 rpm because with the 6:1 FMU disk your f.p. is at 60 psi. Belwo 3500 rpm, your f.p. is below 60 and you'll probably detonate.
You cant use the f.p. riser (the one that comes with the nos kit) with the Vortech FMU, because they act against eachother, and at 3000 rpm when you spray, your f.p. will be around 120 psi.
Another option is the 300zx injectors. This is safer, but requires much more tuning. You can also up the shot b/c you can get more fuel at lower rpm's, and with a fpr you can keep the fp from jumping too high.
Its very hard to tune, but with a lot of though and time, it can be done.

 

Yes it can

 

how many lbs of boost is that 3.25 pulley? what other mods do you have ? i have probably read them before but cant remember.

 

is that how much boost you are pushing 12lbs? spraying at 3500 rpms i thought was ideal. even in a NA set up i thought you wasnt suppose to spray until after 3grand anyway.

so bosco what you are saying is that the fmu creates too much fuel pressure at the low and high rpms?

 

Yep that is what he is saying. Running a wet shot and a boost referenced fuel pressure riser is a bad idea.

This is what SteveSC Chicago did that I copied.

Set up your fuel pressure with an 8:1 so its very rich. With the Fields you have 3 different settings. Use one setting as a boost only tune and then use another seting as a boost and juice setting. You have to have the fuel very rich before you start tuning with the fields because when you get in the higher RPMs you will be at 100% duty cycle on the injectors and you cant add any fuel with the AFC above that point, just add pressure. So its safer to use the AFC to just lean back down to safe AFR levels. You will need to spend a few hours on a dyno with wide band O2 to get this done safely.

The only draw back of the fields is that the adjustments are all the time, not like a Apexi AFC that switches between them depending on throttle position. The way I have my fields set up is setting 2 is full race tune for all RPM points, setting 3 is full race tune or all rpm points with nitrous, setting 1 is my every day tune. On setting 1 I have zero adjustments from 1k-4k which are my daily driving rpms part throttle cruising etc., from 5k-6k I have copied the race trim adjustments. If I hit 5k-6k on I am usually at full throttle and racing the motor up. What the problem is that if you used the Fields in setting 2 with the adjustments for all the rpm ranges the ECU would learn them while you drive around the streets and over ride them. So using setting one hides the adjustments until you floor it and hit 5k. At the track, or if I have time on the street for a quick race, I switch over to setting 2. Its kinda a pain but it works.

http://forums.maxima.org/showthread....ds+afc+nitrous

 

I'm getting 8PSI of boost with my 3.25" Pulley (V1 SC), Stillen exhaust, WSP B-Pipe, MEVI, and Cartech adjustable FMU.

(Soon to come APEXi S-AFC)

IanS

 

do you have a y-pipe? im assuming you mean stillen y-pipe.

 

Oops - Warspeed Y-Pipe also.

 

Well I have the V2 with the 3.25 and I am seeing 9-10 psi.

 

The V2 boosts 1-1.5PSI more than the V1.

 

Do you have messenger or anything like that I would like to talk to you about the mevi?

 

Check your PM's

 

I have a suggestion...I'm not blown, but use NX 50 shot. I use to want a blower (still do!) but I am very pleased with the NX. I have sprayed 75 before, and dont feel like I need to. I still plan on SC, but for the difference in prices, the NX is definitely worth it (comparing 5k to 1k on the N2O). I know it's not always there, and you gotta pay for a bottle refill (about 30 bucks), but it is still a cheap way to beat Z28's and others with ease. Just check out Jime's time slips, maybe compare them to some of the SC guys. I have a lot of fun with the NX and saved a lot of money. I think you should probably do a little more research before you decide. Just a thought, hope it helps....good luck man, and email me if you have Q's