OK I looked at the stickies and FAQ and saw nothing about this... I have run N2O before on a couple of Mustangs but never on my SRT 4. I just need to know if you can get away with running a 100 shot w/o going direct port. I really don't want to go any bigger than this as I already have a 50 trim and this is my daily driver. I just want more than a 75 shot but really don't want the hassle and expense of a direct port system. So is there a problem w/cylinder distribution imbalance going bigger than 75 w/a single nozzle? Who has run 100 shot w/o a direct port system?
OK I looked at the stickies and FAQ and saw nothing about this... I have run N2O before on a couple of Mustangs but never on my SRT 4. I just need to know if you can get away with running a 100 shot w/o going direct port. I really don't want to go any bigger than this as I already have a 50 trim and this is my daily driver. I just want more than a 75 shot but really don't want the hassle and expense of a direct port system. So is there a problem w/cylinder distribution imbalance going bigger than 75 w/a single nozzle? Who has run 100 shot w/o a direct port system?
i have run up to 150 shot with no problems other than spinning the wheels at 120
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i have run up to 150 shot with no problems other than spinning the wheels at 120
You have run a 150 shot through a simple wet system on the SRT4? Thats guts. Did you have any problems?
The only thing about running that much nitrous with a single nozzle is distribution of the nitrous. The amount of nitrous going to each cylinder can vary with a single nozzle and the higher you go the greater the difference. It happens even on carburated cars. The larger the engine the larger the amount of nitrous you can use before it can become a problem. The thing is that there is no way to fix it if it is off, and with out having a way to monitor the a/f ratio of each cylinder there is really no way to tell. Most manufacturers say that a 75 shot is the max you can use on a 4cylinder but that is conservative so they dont get sued and I have run more, I think I have run close to a 100shot but my car does not really see street time. With a 75 shot you will see anywhere from 100hp at the wheels to about 125hp at the wheels if you dont have a race front mount intercooler or meth/water injection. If you want more you can try larger shots but at your own risk. Can you get away with it? Probably but there are no guarantees. If you really want to run that much nitrous and you are going to use it often just go with a direct port nitrous system. It is 100% safe, well maybe not for the driveline, but it will not damage your engine unless something goes wrong. I think the extra $400 or so is worth the extra safety.
Also you say you are already running a 50 trim? Do you have it maxed out? That is a whole lot of power to run on a stock bottom end, if it is in fact stock, and you have that 50trim maxed out.
You have run a 150 shot through a simple wet system on the SRT4? Thats guts. Did you have any problems?
The only thing about running that much nitrous with a single nozzle is distribution of the nitrous. The amount of nitrous going to each cylinder can vary with a single nozzle and the higher you go the greater the difference. It happens even on carburated cars. The larger the engine the larger the amount of nitrous you can use before it can become a problem. The thing is that there is no way to fix it if it is off, and with out having a way to monitor the a/f ratio of each cylinder there is really no way to tell. Most manufacturers say that a 75 shot is the max you can use on a 4cylinder but that is conservative so they dont get sued and I have run more, I think I have run close to a 100shot but my car does not really see street time. With a 75 shot you will see anywhere from 100hp at the wheels to about 125hp at the wheels if you dont have a race front mount intercooler or meth/water injection. If you want more you can try larger shots but at your own risk. Can you get away with it? Probably but there are no guarantees. If you really want to run that much nitrous and you are going to use it often just go with a direct port nitrous system. It is 100% safe, well maybe not for the driveline, but it will not damage your engine unless something goes wrong. I think the extra $400 or so is worth the extra safety.
Also you say you are already running a 50 trim? Do you have it maxed out? That is a whole lot of power to run on a stock bottom end, if it is in fact stock, and you have that 50trim maxed out.
No it is not maxed out, veerry conservative street tune.. and to be honest I probably won't go over 75 shot. I just wanted to know if anyone here had tried it.
Yes many of us have and as far as I know no one has blown there engine from this foruum, but it is possible and someone may have and just not mentioned it out of embaresment.
Yes many of us have and as far as I know no one has blown there engine from this foruum, but it is possible and someone may have and just not mentioned it out of embaresment.
Hayabusa
I got abuddy with a 50trimm and a 50 shot and he tryed to do it all with a SAFC2 and went threw two motors trying to get it right.
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I got abuddy with a 50trimm and a 50 shot and he tryed to do it all with a SAFC2 and went threw two motors trying to get it right.
OK, I need more info on this...I could see that happening w/a stock fuel system. How much boost was he running? Did he have a wideband? Was he running lean? My fuel system is far from stock, I have a 255 lph, bottleneck fix, rewire, return line, 3/8" line all the way to fuel rail and currently have stg2s but will be putting in 750s this weekend (once I raise boost past 16 psi). My SAFC2 has to work it's ass off to get rid of fuel!
I run stage 3 rail, stage 3 injectors, and a walbro 255. That is it for my mods. I run 24 psi on the stage 3 turbo and my AFRs are right around 10.9 - 11.2. I spray a 55 shot wet and they go up to 11.4.
For all those people who say you "need" a return line boo to them!
As for size of shot without direct port, its more dangerous, but hell, look at the LS1 guys. We spray a 300 shot on a cusotmers 414 vette through a FAST 90/90 intake. That distribution is no better than our stock manifold. Sure, its better for the motor to go direct port, but you can get away without it just fine.
--mark
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Yes many of us have and as far as I know no one has blown there engine from this foruum, but it is possible and someone may have and just not mentioned it out of embaresment.
Hayabusa
I only remember one guy that had problems with his nitrous set up and that was due to his mechcanical switch getting stuck! he does not post anymore so no idea what the final outcome was/is.
most guys don't stick around the nitrous forum very long. They normally go big rubo or sell the car.
You need to place the nozzle so that the intake charge tumbles before entering the intake tract. The design on the intake manifold is a great design, but with a high pressure nitrous shot within 4-6", it will over whelm the 1# cylinder. If you mount your nozzle correctly, you will get almost equal distribution to all cylinders. This is a true case of location, location, location. Trust me.
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You need to place the nozzle so that the intake charge tumbles before entering the intake tract. The design on the intake manifold is a great design, but with a high pressure nitrous shot within 4-6", it will over whelm the 1# cylinder. If you mount your nozzle correctly, you will get almost equal distribution to all cylinders. This is a true case of location, location, location. Trust me.
I personally would mount it so that it sprays & hits the 90 before entering the intake tract. You get the air to tumble into the intake, it stead of a spray thats only going to 1 & 2. I would stay even with the air intake temp, or before it. I mounted mine alot closer and about 60% of my shot went into the 1# and bent the rod, scuffed a piston and cracked the block internally.
I know you will think I'm crazy when I tell you this, but. I've mocked up the intake, tb, intercooler piping, and with a 3 second burst from the nozzle showed me, what I learned from the damage I could see. The inside bend of the river doesn't flow as fast as the wide outside bends. I found that with my nozzle location if I spray the shot almost directly into the wall of the inside tubing toward the openings on the manifold it almost gave me equal distribution. But I experienced problems that noone here gave me any input on. I plan to start all over again, all forged internals. I already have my 4 nozzle. I was planning to shoot for the moon, but like NASA I experienced technical difficulties.
Ive personally never heard of any problems mounting the Nozzle 4 to 6 inches away. You are the first person I have heard of that had that problem. What size shot are we talking here? I am not saying it didnt happen, just that I have never heard of it happening. I have my nozzle about 6 inches away with it pointed to have the most direct path. I have run around a 100 shot at times and have used it well over 100 times with no problems. Most SRT4 owners have there nozzles in the exact same place you describe(4 to 6 inches away) and all nitrous manufacturers recommend it there.
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100 shot w/single nozzle?
I just want more than a 75 shot but really don't want the hassle and expense of a direct port system. So is there a problem w/cylinder distribution imbalance going bigger than 75 w/a single nozzle? Who has run 100 shot w/o a direct port system? 
.. and to be honest I probably won't go over 75 shot. I just wanted to know if anyone here had tried it.
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