KiwiBacon wrote:How smokey is it?
First I ran the figures from airflow, working through to see how much fuel could be burnt with a hot and smokey, but not instant meltdown A/F ratio (16).
rpm 3300
BSFC 300 (ballpark, could be 10% either way)
AF 16 (smoke limit on a healthy engine, but very hot whether smokey or not)
Boost 36psi
VE 80%
Compressor 70% efficient
Intercooler 60% effective
Ambient 20C
Sealevel
Results:
Fuel burnt 137 cc/1000 shots.
Torque at crank 670Nm
Power at crank 231kw
Now if we keep the airflow the same and crank the fuel up, the results get less accurate. Simply because you're dumping a large amount of fuel out the back unburnt (clouds of black smoke) which doesn't contribute to extra power.
With 190cc/1000 shots of fuel we get these results.
Power at crank 320kw (this won't happen)
A/F ratio 11.5:1 (this will happen)
An A/F ratio this low isn't producing power, it's just destroying engines. Massive amounts of smoke, dangerous EGT's etc. Though the excess diesel will evaporate and cool somewhat like a rich petrol mixture does, this isn't a good thing.
Take the A/F ratio back to 14.55:1 (stoich) and see what the limit of power will likely be.
Fuel 151cc/1000 shots
Power 254kw (343hp)
Torque 735Nm.
My opinion, not enough boost to develop 300hp at the wheels with big rubber, but it'll be close. It's a very hot and smokey tune either way you cut it.
We are running 15.1:1 AFR At given Hp , Leans out in the top end just to help with EGT'S
On the gymkahana High speed runs massive Back straight i seen 830Degree pre turbo exhaust temps . so yes at given hp if we held it in steady state it
would melt to pieces but load of car isn't enough it either breaks traction or
accelerates
Its funny that your fueling figures are lower than i expected to get given hp,
because i bet everyones fueling figures (mine included) are done with
12sd12 iso7440 test injectors wich may flow more than the std injectors?
i might make some a size to a size lines up one day and do the excercise
Thanks for your time Kiwibacon
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