600hplt1sm

Hello, Im just curious. I recently had a motor built for a blower application. The CR is 8.8 to 1. Ive been having some issues with the blower itself and i am about fed up with it. The car is a mainly street car with occasional trips to the track. I know a N20 motor likes the higher compression but are there any potentinal problems with using N2o on a low compression motor

Ray@NitroDaves

nitrous doesn't care what the CR of the motor is

antne194

I was also wondering how the CR effects a nitrous application. I understand by injecting nitrous you are effectively creating boost, but does the nitrous prefer a greater CR? Is this a instance where you could run more nitrous due to the lower CR and still not exceed the maximum cylinder pressure for the application? I am planning on a motor build this winter and inquiring minds ask ALOT of questions. Thank You in advance and I hope the answers help the original post.

Ray@NitroDaves

Boost = higher than atmospheric pressure

Nitrous does not add "boost" to the engine, it is still at atmoshperic pressure. Nitrous cars are still considered naturally aspirated but have a power adder. Nitrous increases the amount of oxygen in the cylinder which allows you to burn more fuel.

CR is a factor of how much you are compressing the mixture in the cylinder. Boost wants a lower CR due to adding pressure with "boost". Nitrous doesn't care because it is still naturally aspirated.

Will you make more power with a higher CR, yes, is it required, no.

For the AVG street use nitrous car, build the car for good power on motor, then add a little nitrous on top of it.

antne194

I stand corrected. Thank You for the quick reply and the education.

600hplt1sm

Thank you for all the replies