I was told by this Cobra guy that "my buddy has 800rwhp with 28lb on a stock Cobra motor". Now I am thinking BS b/c if this was true that why wouldn't the Pro drag racers use that motor I mean stock 800hp and on the stock supercharger. What would it do built!

I have seen 540hp on a Stock motor cobra and it lasted 3-4months before it craped out. And even the 600hp guys say "well I got 600+hp but I have it turned down on the street.

Is there a Power level they can hit and stay at relieably? with the stock motor and supercharger! Oh and that 540rwhp car ran A 11.82! I saw it!

 

I don't know a whole lot about Cobras, but I gotta call

 

that sucks bigtime for that kinda power.

 

i was thinking the same thing

 

I don't even think the stock cobra supercharger could even put out 28lbs.

 

Whoever is telling you this stuff is an idiot. X2C Motorsports has a T-88 stock motor '03 Cobra that is cranking out 800rwhp though. The limit hasn't been found yet. They believe 1000rwhp is attainable. I doubt it would live at the track though. 540rwhp is damn near impossible to reach on the "stock" blower. It would HAVE to be ported to get to 500rwhp along with all the bolt ons. My buddy has a 660rwhp '03 Cobra 'vert that drives like a dream on the street. He's running a Kenne Belle blower.

As for someone running an 11.82 with 540rwhp, I wouldn't doubt it. There are a lot of non-driving fools. I've seen Z06's run 14's. That doesn't mean they all do.

 

It can't. I'm will be spinning mine to 16psi (currently 14.5psi) and it's extremely inefficient at that point. It can be spun higher, but the power just isn't there.

 

Forget the engine, think about the S/C. The stock blower is a 112 (112ci per S/C rev). At 2:1 engine to SC overdrive, that only flows about 750 CFM. At 2.5 times engine rpm (15,000 blower rpm at 6000 engine rpm - pulley change) that's about 950 cfm (at about 11-12 psi). The Eaton blower (stock Ford) can be run reliably to about 17,000 rpm. At that cfm (950) the engine can support somewhere around 525 crank HP, maybe a little more. So I do believe 540 crank HP. The stock 4.6L bottom end could live there (don't know how long, but a while). The stock 112 S/C just doesn't put out enough CFM for 28 psi on 4.6 liters. Not even a ported 112 can do that much on a 4.6! 'Cause it still puts out only about 112 ci per S/C revolution - period. Porting only helps the output temp, not a lot on the cfm. The 112 on a 3.8 liter GM V6 only puts out 18-20 psi! The numbers just don't add up! Turbo could do it, but not a stock Eaton blower! Fun story, though.