Ford Performance Cobra Jet Intake Manifold - Page 2 - Ford Mustang Forum
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Joined: Jul 2016
Location: Phx
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Originally Posted by Leo41 View Post
Dude.. wow that graph.. perfectly illustrates.

I had no idea the stock intake dropped like rock after 6100 rpm, guess we need to change our stock shift points. Unless maybe it is in the stock tune (were you tuned stock? .. doubtful by the before).

I don't like the drop in everything below 2800 rpm, but wow on the over that part.

How does it feel off idle in normal driving? That drop is pretty rough.

Still stuck on stock putting out nothing about 6100.. I do wonder if they stopped the test stock at that RPM.. it's like a rock.
It doesnt

12 GT Brembo, MT82, 3.73 rear
Wheels/Tires - 19x10/11 SVE S350 w/ 285/35 Sumitomo HTR Z III & 305/35 Michelin Pilot Super Sports
Suspension - Strange Adj Shocks/Struts - FRPP K-Spring front, Eibach Sportline rear - J&M CC Plates - BMR LCA/Relo - Steeda Adj UCA - BMR Adj Panhard - FRPP Sway Bars - FRPP Jounce/Bump Kit
Drivetrain - Blowfish Racing Bracket - Spec Stage2 Clutch/Steel Flywheel - SVE Clutch Cable - ShaftMasters Aluminum Driveshaft
Exhaust - DNA T-304 1-7/8 Shorty Headers - Solo Mach Full Catback
Engine - Stock, for now...

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The graph is screwed up, the RPM's are wrong in one of the two runs; I can't quite decypher which one. You basically need to shift one curve to the left so it lines up at the beginning, or vice vesa.

That's pretty confusing; I did not realize it works that way; I thought the RPM data was engine RPM taken from the RPM lead so you should be able to overlay the two runs correctly. I don't know how you can back-calculate the engine RPM from rear wheel RPM unless you plug in the tire size and gear ratios, and I don't think they do any of that when you do a dyno run. I know for sure they did not ask for any of that information when I had my car dynoed. I've tried to think this math through a few times without success.

| 2010 GT coupe | Daily Driver with some Steeda and GT500 take-off stuff for the occasional track day
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