cyotani

iTrader: (8)

I think that's mostly due to the compressor efficiency which will affect temperature out which was assumed constant in the super ghetto PR * NA HP equation. Just use that to get a ball park idea of HP per Psi but compressor maps are the way to go but it sounded like reading compressor maps were beyond the scope of the OP.

Kens_Clubman

Anyone asked what fuel (Pump vs E85) and ignition timing he's running?

sixshooter

iTrader: (12)

Doesn't matter. All engines pretty much make the same power at the same boost pressure regardless of other variables. It's called dynamic linearity. You can't argue with science.

18psi

iTrader: (76)

Took the words straight outa my head...........from yesterday

GET OUT OF MY HEAD CHARLESSSSSSSS

aidandj

iTrader: (5)

Here is an overlaid dyno plot of 2 different setups at 8psi. This is why you can't compare.



Exact same MAP, 50ft/lb difference.

sixshooter

iTrader: (12)

That's like, your opinion, man. Post some numbers to back it up.

thumpetto007

iTrader: (15)

Can you explain this further? Or were you just joking.

Even the same car, same boost, same setup, makes drastically different power/torque with different ignition timing. I'll be running 16psi at 7000rpm from a c30-94 rotrex... are you saying I'll make 350whp regardless of my ignition timing, fueling, altitude? That doesn't seem right. Not trying to argue, just curious.

Thanks

hi_im_sean

iTrader: (3)

aidandj

iTrader: (5)

It's more than just efficiency. Its bigger and moves more air. A gt40 will move way more air than a 2554. At the same psi. Even if they are both perfectly efficient.

18psi

iTrader: (76)

krissetsfire

iTrader: (1)

ridethecliche

iTrader: (2)

I don't know how I ended up down the rabbit hole to this thread, but this picture needs to come back into the limelight.