Thank you Bruno for clarifying what it is you are trying to do. Yes I believe that you can safely do it. You seem to know where your A/F ratios are and you already have a nitrous controller so I dont see why not. My friend used to street race with that much nitrous on his 13B RX-2 back in the mid 80's without the help of a nitrous controller or A/F meter. Not to mention your 3/4's of the way there already.

 

Yeah, but how long is that good for? A second or two, till the temperature changes. And it'll change during the day with different temps of the air.

But then again, thats like saying that if you know the compression of an engine, and you know the amount of air it takes in per revolution, then you should be able to figure out the HP. But thats not true. Different engine designs are more effecient. So there is no ONE formula. Maybe one formula per engine, but no one universal formula. Not to mention the exhaust manifold design can make a difference, and the efficiency of other parts of the set up. So factor those in there. Now how about giving me the actual equation if you know so much about it.

Blake

 

Here is the equation I use to calculate airflow, the point is that you have to start with something, I agree with you. that type of rotors used, apex seal used, exhaust system used, type of fuel used, spark plugs and all other factor that you mentioned play an important roll when it come to producing power. the formula used it will give you theorical air flow and from where I see it has work worked for me. the same goes when you want to calculate air flow for a turbo and want to figure out which compresor wheel to use.

all the calculations used wont give you an exact figure in real life, but they should be very close to what you have calculated, otherwise there is something wrong with the calculations used or with a component of your engine. ( exhaustsystem, spark plugs, apexseals, airfuel mixture, etc)

 

I make over 500 on 22psi

 

are you using methanol? street porting? peripheral porting, is it rotary? if you are using 1600 cc injectors it looks to me that u are using peripheral porting, otherwise you wolud not be able to maintain a stable idle with just big injectors. if you are staging them cause if you are runnng then together will be imposible. are those 500 hp flywheel or rwh. are they sae HP or DIN? what A/R housing are you using?

why dont you tell what are you using in your car?

 

Blake
Can ya chill a bit? Can you respond with a little less attitude? First you attack me and now your giving Bruno attitude, like he thinks he's somekind of know-it-all. I haven't found Bruno's posts to be arrogant in any way. He is simply posting information on what he knows or believes.


Temperature changes? Dude, what the heck are you saying? How far off do you think the horsepower ESTIMATE is gonna be with temp changes?

You talk about efficiency, didn't you tell me not to post if I didn't know what I was talking about, well look in the mirror buddy. Have you ever heard of BSFC? Well obviously you haven't or else you wouldn't have written what you did. BSFC stands for Brake Specific Fuel Consumption, and as far as I know, it the standard efficiency parameter for ANY internal combustion engine. BSFC takes into account ALL parts being used on an a specific engine.

If showing a little respect is too difficult, then show your disrespect elsewhere.

 

just post your technical reason why you think the way you think and back it up with information. dont express your ignorance with arrogance and stupid arguments.

 

you forgot to mention that the engine is a 20B right?

 

you will have to start using a aftermarket computers like haltech, motec, microtec, etc, etc,
with those you can compensate for those variations that you mentioned. and by the way we are talking rotary engines in here not pistons.
Intercolers play a very importan factor with tempeture and you have to know how much heat to disipate in order to desing one, or buy one.

well if what are you saying is true there would not be a ecu capable of mananging the fuel mixture in a engine. the ecu processes information coming from the engine and accordinly the ecu responds to those changes, giving the engine the exact amount of fuel needed for proper operation. Now if you know how much fuel the engine takes at a certain point you can calculate an estimate of HP deliver to the wheel. whether your drive the engine on the desert, at 6000 feet above sea level or alaska.

 

Nos is the easiest and most cost effective way of adding power. If done correctly extreme power numbers can be produced. However if done wrong you can loose ur engine. BUT-unlike the fast and the furious- your car will NOT blow up. If however you still think its dangerous then by all means leave it alone and let people who know how to use it do so. Ill just be laughing as I pass you.

Play nice.