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207 Posts
Run was made on a dynojet. Pump/race fuel mixture of 5gal/12gal. Pulled TRAC fuse,
overdrive off, outside temp. was around 82 degree F.
My mods are below in the sig. Set the boost
limit to 1.25 bar. The dyno tech could not
figure out where to put the RPM sensor so
my run was for HP only, so my power is power
curve is plotted as HP vs. Speed.
Brought the car slowly up to 3rd gear and at 60 MPH, I floored it all the way to redline
for both runs.
First run, DSBC ratio=65,gain=5 max. boost
hit 1.07bar(~15.4psi)and only 261 RWHP.
Second run, DSBC ratio=72,gain=5 max. boost
hit 1.09bar(15.7psi) and only 268 RWHP. WTF!
I can routinely hit my 1.2 bar boost limit on the street with ratio=72.
When I look at both curves, I let off at redline and the dyno was only registering
125mph!!! When I floored it at 60mph both
curves show the power coming on, at 80mph the
car is making 240HP, but then the power abruptly drops by about 25HP, and the curve after that is alot flatter. Max. HP is only at around 105 mph.
On my way home, I could hit 1.2bar and did
not hear any death whine.
What the heck is going

overdrive off, outside temp. was around 82 degree F.
My mods are below in the sig. Set the boost
limit to 1.25 bar. The dyno tech could not
figure out where to put the RPM sensor so
my run was for HP only, so my power is power
curve is plotted as HP vs. Speed.
Brought the car slowly up to 3rd gear and at 60 MPH, I floored it all the way to redline
for both runs.
First run, DSBC ratio=65,gain=5 max. boost
hit 1.07bar(~15.4psi)and only 261 RWHP.
Second run, DSBC ratio=72,gain=5 max. boost
hit 1.09bar(15.7psi) and only 268 RWHP. WTF!
I can routinely hit my 1.2 bar boost limit on the street with ratio=72.
When I look at both curves, I let off at redline and the dyno was only registering
125mph!!! When I floored it at 60mph both
curves show the power coming on, at 80mph the
car is making 240HP, but then the power abruptly drops by about 25HP, and the curve after that is alot flatter. Max. HP is only at around 105 mph.
On my way home, I could hit 1.2bar and did
not hear any death whine.
What the heck is going