[s-cars] Pressure specs.

[Mihnea Cotet]

Mark, see answers below,

At 20:52 8/04/2003 -0400, Mark Strangways wrote:
>Has anyone ( I know someone has) measured the deltaP across the STOCK
>intercooler, and the deltaP across the stock air filter.

I didn't do it but it's pretty minimal and necessary... what would you do
with deltaP=0 but with super hot air?

>I understand these will vary with flow, but I need some baselines to play
>with a turbo map.

They don't have anything to do with a compressor map, deltaP is so low that
it doesn't affect the way your engine reacts to a compressor... and the air
filter doesn't affect the compressor either, if it is clean at least...


>Also, how many Lbs/min converts to HP,

Dunno in lb/min but you can work it out with this formula: 0.09 kg/s=100 HP
for a gasoline engine.

>If I induce 30 Lbs/min of air from the Turbo, what fuel would I need ?

about "that" much... 30 lb/min @ what RPM?

>Can I base it on 14:1 ratio air fuel ?

Sure no, at WOT and with a turbo engine you can base on 12.5:1 to 13:1 AFR
but it all depends on the exhaust temperatures you get with a certain
mixture, which also depends on timing advance...

>Or should I use a fatter ratio to have some spare fuel sitting around.
>On the subject of injectors, what are the stock and RS2 rated at (lbs/hr.)

Ummmmmm, damn lbs/hr units :-))) from the information that I have, an RS2
injector flows 415cc/min @ 3.8 Bar, thus about 40 lbs/hr @ 3.8 Bar or about
32 lbs in the normal "@ 3 Bar" ratings.

Hope this helps,


Mihnea