[IS300GTE]

Re: I have a question

no one can tell you how to spend your money, no one knows whats best for you, but you

one correction, you reaction time will not effect your quarter mile time or mph, the only time that reaction times count, are in bracket racing. maybe you mean your 60 foot? if so, what was it?

-gte

I was reading the uncomplete turbo list and read an interesting fact. I was reading that at SRT Stage 2 ran a [email protected] in the 1/4. With the mods in my profile i have run a [email protected] in the 1/4 mile (shitty reaction time on my part). I was thinking about getting that exact kit. So the question is should i try to tune and break into the 12's and save money or get turbo like i want to? I was planning on using nitrous with the turbo kit which would make my times better. But, after reading that it kind of makes me want to pursue the 12's on a non-turbo setup. Any opinions are welcome and i thank you for your input.

 

[IS300GTE]

alright, lots of misinformation

nitrous has a "cooling effect" because it changes from a liquid to a gas at around 600F under atmospheric pressure. when it goes into the intake manifold, its a gaseous form, because the intake manifold is below ~600F

the reason nitrous is hard on the drivetrain is torque. an extra 100hp or tq from nitrous is just that, in less then a second that much extra torque (which is also stress) is applied to an engine. which is much harder than gradual application of extra torque.

for example, how do you break something loose, such as a rusted bolt ... do you sit there and pull, and steadily increase the pressure put on the bolt with your arm muscles, or do you "jerk" on the rachet hoping that the sudden impact will loosen the bolt? i don't know about you all, but i'll jerk on it, that sudden change in torque is much harder on the bolt (comparable to the crankshaft) and will break it loose. if you were to steadily increase torque on the bolt by 25 foot pounds per second, there is a good chance it would not break loose at all

its all about the steep variations

-gte

 

[IS300GTE]

the piston and rod are the lever arm at which creates torque on the crank, which is then transfered through the clutch/drivetrain, to the wheels ...

herego (j/k)

nitrous increases cylinder pressure and temperatures, and it does it at a rate that is much steeper than a turbo or supercharger. it also makes it harder to control, and less forgiving if shit happens, which is why it could be harder on the internals.

the internals don't care how peak cylinder pressure is given, be it nitrous, turbocharger or supercharger, its stress, period, if the peak is the same ... but how quickly it is reached, and how controlled it is, can be the breaking point, or savior to the life of the motor.

see the rusty bolt analogy, and think of it in terms of stress

-gte

ook. but what about the internals? why do i hear that nitrous is bad for the internals? isn't it because of the high heat it creates with a larger explosion?

 

[IS300GTE]

i also think (although i have no measured data to support this) that nitrous, and its violent or sudden changes in cylinder pressure, creates greater hot spots in the cylinder

it also reaches peak torque much faster, which is good for performance, bad for cylinder pressure

-gte