Can any one help me as to why i am having such high injector dutys? and i am wondering if the advance looks funny to anyone else. I am running a equivelent to stage 2 tune, with a 3.0 pulley, 42# inj, cold air intake, and corsa cat back
Can any one help me as to why i am having such high injector dutys? and i am wondering if the advance looks funny to anyone else. I am running a equivelent to stage 2 tune, with a 3.0 pulley, 42# inj, cold air intake, and corsa cat back
i forgot to mention its a 06 cobalt 2.0 sc
try this for IDC
[sens.112]*[sens.70]/1200
I sent him a copy of the GM Stage 2 equiv. His injector duty rates exceed between 110% - 130% at about 6,000 RPM (3in Pulley). When he was on a 2.8 pulley (we all know not a great idea), was sitting at 140-150% IDC.
He still has a CAT. I recommended checking injectors for them sticking, ditch the CAT and if he has an intake going back to stock airbox.
I have a friend with a 06 SS/SC his injector duty cycle is also between 110%-130% under WOT. He has a Gm stage 2, and was tuned on the dyno a week ago. On the dyno the IDC was only 46%.
thats what im using right now doc
Sounds to me like 50+lb injectors would be more ideal.
It doesn't have to be perfect, it just needs to be done in two weeks...
A wise man once said "google it"
Something is wrong. He is seeing higher numbers than someone using 42's and a 2.8" pulley.Originally Posted by Bill@HPTuners
This is an updated Stage 2 tune for a 2006.
I am curious if the other config file solves things. Either way, this tune is newer than the one you posted.
Show me the tune & scan from other said vehicle.
It doesn't have to be perfect, it just needs to be done in two weeks...
A wise man once said "google it"
The other cars I have done setup like yours were all in the same range mine included when I had my 3" and 42s in it.
is there anything wrong with the tune that would be causing high IDC????
Yeah just running the numbers through a rough injector sizing estimator says to get to 90% IDC with say 300whp you'd need 50lb injectors rated at 43lb/hr if your fuel pressure is at 58psi(not sure if thats what cobalt's run, just an educated guess really)
It doesn't have to be perfect, it just needs to be done in two weeks...
A wise man once said "google it"
not that I can see.
It doesn't have to be perfect, it just needs to be done in two weeks...
A wise man once said "google it"
my asumption is that it should run with no problems with this tune because it is "gm stage 2 tune" with "gm stage 2 pulley and ingectors" or am i wrong?
Cobalt Stage 2 Performance 245 hp Upgrade Kit 17803229 Description
17803229 Stage 2 Performance Upgrade Kit, Cobalt SS/Saturn ION Redline
For 04-07 Saturn ION Redline And Chevrolet Cobalt SS only. This Kit enhances engine performance to 245 hp (up from stock 205 hp). Includes high-flow injectors, supercharger pulley, new special length supercharger belt & specific performance engine calibration.
this is gms specs so your 300 whp is a little high of a estimate
Doc I guess we can try the stage 2 tune that YOU have however I believe the problem is not with the tune as it is something related to the hardware (GM Stage kit) that may be causing the issue.
Even at a 250hp estimate 45-46lb injectors is the estimated need.
Undersized injectors generally means you'll have high IDC's
It doesn't have to be perfect, it just needs to be done in two weeks...
A wise man once said "google it"
This is from a 05 SS/SC with 42# injectors and a 2.8 pulley. Its using the exact tune I posted.
Ok so you've got an injector duty cycle of 120%. Was your run on a dyno?
Either way its well over the point of making injectors no matter if your at 120%, 125% or 130% lol
It doesn't have to be perfect, it just needs to be done in two weeks...
A wise man once said "google it"
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