MentalCaseOne

Assuming your engine can take advantage of it and there arent any programing issues I believe you can squeeze upto 500hp out of the Z06 MAF.

I got the information from this website:

http://pro-flow.com/tech%20info/sizing.htm

If the info there is correct that Z06 MAF will be the perfect size for my 400HP (flywheel) LT1 I wish to build some day.


Marvin

Beertestr

On a factory LS6, that is all the air it was pulling. Now, you need to factor in things like exhaust restriction, compression ratio and cam timing. YOu can pull that air, but you need to let the exhaust out without a lot of pressure (it takes power to push exhaust out a restrictive exhaust). If you are running 11+:1 compression like the LS6, you will be generating more cylinder pressure, and therefore more torque, and finally HP at the same RPM. Cam dimensions also dictate how long significant cylinder pressure exists, if the exhaust valve opens too soon, there goes power. Finally, ignition timing comes into play. THe sooner you can initiate charge, and reach max pressure, the longer you will be able to apply that pressure on the piston, and contribute to torque.

Now with all that said. YOu may be pulling 267 g/s, but you are under optimized in other areas, which affects the peak power. You could also say you are not making power as efficiently..

MentalCaseOne

Yeah that must be it. Lower volumetric efficiency? (wrong term?) or using more gas to make an equal amount of horsepower. (upto my max hp that is).


That reminds me, without any other boltons, if I slap a low restriction catback I wonder what my hp is gunna shoot up to.
I am gunna calculate whats the max hp (flywheel) I could get from efficiently burning 267grms/sec at say 13.5 air to fuel ratio with a volumetric efficiency of lets say 85%? then I minus the tranny losses (at sea level 75 degree air temp). Maybe I will do a spread sheet.

I just like to play with numbers and later see if I came close to them. Good pastime Keeps me from getting into trouble. =)


Thanks for the info. very interesting.


Marvin

Beertestr

Fun with Excel.. be careful, it can get to be time consuming playing with variables, but definitely a learning experience.

For trans losses, use 98/96/100/98% for gears 1-4 for gear efficiencies, and assume about a 8 ft-# loss through the trans. It is a rough rule of thumb, but useful for you purposes. COnvert the torque to HP using the engine RPM you are calculating for.

Use about 8% for power loss through the rear axle too..
All additive.

MentalCaseOne

I see what you mean

Should I get desktop dyno instead (cheat?) nawww
it would take the fun away. Hey that is some really good info you are giving me. That spread sheet is gunna be my spare time hobby. Thanks for the tip to convert to HP. I will do.


Marvin