I am thinking about upgrading to an AMS GT37R turbo in the spring, but have concerns about the 4400 rpm spool up. I have heard of people putting a small nitrous shot on their cars to get them to spool.
Does anyone have any experience they could share on the subject?
Well I have heard the same thing. Whether or not it is the spooling of the turbo, or the fact that at low RPMS nitrous is like torque in a bottle I dont know. If you add a 50 shot to your car and have it come on at 3000 rpms you will not miss the low rpm boost at all. With a 50 shot you will end up with at least 75ft/lbs more torque at 3000 rpms. That will dismiss the affects of any turbo lag you will have. Then when the turbo does get spooled up the nitrous will help to cool the intake charge about 70 degrees. This in turn will make the turbo far more effective. I guess the turbo may even spool faster because with the extra air coming in at low rpms the more air will be expelled. Whether this makes as much difference as having the 75 ft/lbs of torque I dont know. I guess that is something an engineer would have to explain. Im just a lowly police officer/mechanic.
But anyways the two make an awesome duo. So far all the 10second cars I have seen have used a 50 shot to help either get them moving, or to help cool the charge. So yes go for it.
I've read articles on cars that needed that extra boost to spool their turbo on the line. On of them was a LS1 with a HUGE snail hung off the front. It is a pure racecar, mind you. They were having trouble keeping the boost up while stalling the trans. A 100 shot fixed that. It ran 6's I believe.
Now did they keep it on down the track I don't know.
are stock rods with upgraded pistons ok for nitrous, or are new rods a necessity as well? i mean for a 100 shot, max. (asking for friend who's not on the forum)
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are stock rods with upgraded pistons ok for nitrous, or are new rods a necessity as well? i mean for a 100 shot, max. (asking for friend who's not on the forum)
Yes. Stock internals are just fine with nitrous. With a basic wet kit I wouldnt recommend going over a 75 shot. I sometimes go to a 105shot or so, but I would never recommend that to someone asking this question. If he, or you, are going to run a 100shot all the time get a direct port system. The stock internals can handle the power levels over 75, but: When you put that much into the system before the TB it will, or might not be equally distributed. You could show an a/f ratio of 10/1 which is way to rich. One cylinder may have an a/f ratio of 8/1 while another cylinder be 20/1. You wont be able to adjust this with a basic wet system. With a direct port system this is not a problem at all.
Just keep in mind, no matter what you do, upgrade your internals.
When you say upgrade your internals are you refering to the original post going big turbo and nitrous? There is no reason to upgrade your internals for these levels of nitrous? Just ask aeronneon. He has a motor with well over 50,000 miles putting out over 400hp that he has run over 100 bottles through. He says the motor is still running strong. Going big turbo and nitrous would be different as the power levels can be outrageous. This would mean better internals are needed.
he's actually buying my 50 trim, and i'm going back to stock. he's looking at dp nitrous. are the stock rods ok for 125 shot or so, or are the pistons the problem?
Well with the 50trim you can max out the stock internals with the turbo alone. Adding that large of a shot to even a badly tuned 50trim will put you into power levels that wont be so good for the stock rods. Generally speaking when you upgrade just for a larger shot of nitrous you get pistons designed for nitrous. They are forged, and they actually make nitrous pistons, and special nitrous rings. If you are going to be changing the pistons you would go ahead and change the rods too. If he can afford to I would go ahead and change out both. The stock internals can handle the 50 trim and a small cooling shot of nitrous, a 50 shot or so, but that is still alot of power on the stock internals. I am no expert on what this engine can take as far as power numbers. I think I stated before that aeronneon has an engine with tons of miles on it pushing in the mid 400's, running stock internals. He has run more nitrous through that engine than probably anyone else here, but as he stated when he posted that, he has extra engines laying around if it goes.
I would go and ask one of the experts in one of the other sections how much power the stock internals can handle. I am no where near the 500+hp he could have with a 50 trim and a 125 shot of nitrous, not to mention the possible 600+ft/lbs of torque it could make.
are stock rods with upgraded pistons ok for nitrous, or are new rods a necessity as well? i mean for a 100 shot, max. (asking for friend who's not on the forum)
well im not sure what your freind is looking to do. if he just wants to use n2o to spool the turbo a single fogger 35HP shot should be all he needs, i think he will have major traction issues unless he plans on running a full slick and some suspension work. i think he should have his setup to use the turbo to make the power, not the n2o. he will get more mileage out of a 10lbs. bottle if he sprays the 35 shot. what are his power level goals. im sure he can make 500-600 hp its just going to cost a pretty penny.
I'm thinking about adding a 50 shot to spool my 60trim. I just like to tell myself that I would only spray from like 3K-4K rpms, but I have a feeling that I would spray till redline. I'm sure my stock internals wouldn't like that.
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Something to think about that I leaned from a Porsche guy a few years ago. He had a rear engine Porsche of some sort with ugraded turbos... almost a full on race car. It was a low 10 second car at the track, but had more potential that he could not unlock because in order to get a decent launch, he had to drop the clutch at an ungodly rev range. He continuously broke drivetrain parts.... until he started using nitrous....
A small shot... 50hp, that shut off when boost reached 10psi. He could then launch it at a lower rpm, saving the drivetrain. That was the BIG benefit... but there were other smaller bonuses:
He didn't need to upgrade the fuel system, it was already completely capable of 600+hp, and since he wasn't making any more PEAK hp, all was well.
He also didn't need to upgrade the internals, again, because no more stress ( in fact LESS stress) was put on the rotating assembly.
It's pretty much a win-win sutuation.
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I'm thinking about adding a 50 shot to spool my 60trim. I just like to tell myself that I would only spray from like 3K-4K rpms, but I have a feeling that I would spray till redline. I'm sure my stock internals wouldn't like that.
look up a company called FJO racing. They make the Maximizer 2 for NX. Its a TPS/RPM/2 stage switch that you can add a map sensor to and it will cut off the n2o at a set boost psi not rpm. pretty cool product
click here -->FJO Racing.com or NX Maximizer
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Nitrous To Spool A Big Turbo
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