Low end torque loss with HFC
07-09-2009, 07:39 AM
#16
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07-09-2009, 08:40 AM
#17
Yep.. thats what intakes, hfc's, headers, etc do. Stock components are designed to make power from approx 2k-4k rpm. Most ppl drive in that range so thats where the intake length is set to take full advantage of the acoustic tuning effect (reflective waves). I love the flat torque curve of the engine in stock form, very drivable car.
07-09-2009, 12:15 PM
#18
That's true, but if you think about it most people aren't going to be hitting it wide open throttle at 2200rpms, they would most likely downshift. So even though there is some torque loss down low it's very minimal. You would only really feel it on the highway stuck in 6th gear giving it gas. I'm only going by those charts though, I'm sure with exhaust and intake bolt-ons there's more torque loss then what is actually advertised.
07-09-2009, 12:44 PM
#21
^ I was told by the dealer A/F should be under 20. If you were at 10.0 that is very lean, not rich.
Either way you have to be in the middle.
I am like 14.0 at WOT.
but it jumps around depending on throttle position,Intake temp.
Since the Cobb has so much going on, why not upload your data to COBB?
They could tell you more of whats going on with your paticular set up.
(Isn't that why we paid for this thing, is to get some real adjustments)
Either way you have to be in the middle.
I am like 14.0 at WOT.
but it jumps around depending on throttle position,Intake temp.
Since the Cobb has so much going on, why not upload your data to COBB?
They could tell you more of whats going on with your paticular set up.
(Isn't that why we paid for this thing, is to get some real adjustments)
07-09-2009, 12:51 PM
#22
^ I was told by the dealer A/F should be under 20. If you were at 10.0 that is very lean, not rich.
Either way you have to be in the middle.
I am like 14.0 at WOT.
but it jumps around depending on throttle position,Intake temp.
Since the Cobb has so much going on, why not upload your data to COBB?
They could tell you more of whats going on with your paticular set up.
(Isn't that why we paid for this thing, is to get some real adjustments)
Either way you have to be in the middle.
I am like 14.0 at WOT.
but it jumps around depending on throttle position,Intake temp.
Since the Cobb has so much going on, why not upload your data to COBB?
They could tell you more of whats going on with your paticular set up.
(Isn't that why we paid for this thing, is to get some real adjustments)
14.0 is way too lean
10.0 is way too rich
Optimum power would be in the 12s. My car is getting a custom tune next Friday. I don't even have my Cobb installed anymore because the numbers were too ridiculous on any of the staged maps.
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