BigJim

Ok well im gonna make a Console Based C++ program used to estimate hp. Now what i need is the % or HP gain from every item you all can think of for teh 12a and the 6 port 13b. I can look alot up, But your input would be very useful. Prices would be great as well. I need to know the estimated gain for each separate piece, and the entire set for multi item sets like racing beat exhaust. I would want the hp gain for hte header, loss for the presilencer, and loss for hte muffler. Hopefully this program can be used by newbie owners to figure otu what they want to do. Streetport and bridgeport and watnot estimates as well as price would be great as well. Stock hp for 12a adn 13b at flywheel and rear wheels would also be useful. Hopefully when i get this program done it will output flywheel hp, rear wheel hp, and price.

Keaponlaffen

are you going to figure in Torque values, including the RPM's that the torque curve is shifted to? That would be VERY useful 'Cause changing your exhaust setup changes your torque curve, as well as horsepower and horsepower peak....

Getting valid gain values is going to be very difficult, as a lot of the stuff people estimate by is "seat of the pants" dyno, meaning they think that removing the stock clutch fan gives them 75hp and 35 lb/ft of torque....

BigJim

Id like to be able to calculate a curve, but i think it depends on way way to many variables. As for torque, if i can find hte formula fo rfinding torque i may. As for valid gain values. I was just gonna use the percents that are given by the producer. RB says their exhaust setup gives like 15% so id do 15% over stock. Everything would be over stock because i doubt rb exhaust gives 15% gain over say a bridgeported, carbeurated, supercharged car. So everyhting would be over stock hp when using percents. Even if its not really accurate, itl give most of them a decent idea and a price.

mwatson184

The thing is, it isn't 15% over stock across the entire band. It might just be peak power, and there might be losses lower in the curve.

BTW horsepower = (torque * 5252)/RPM

torque = (horsepower * RPM)/5252

Ever notice that the hp and torque curves always cross at 5252 rpm (assuming they are using the same y axis)?

I think the idea is kinda cool, just know that these will be vague estimates with a very high error.

-Marques