Cobra vs ferrari 430

Intouch · #1 (**permalink**) 12-22-2008, 12:46 PM

here are the long overdue pics of my MKIII and some impressions:

we went out for a nice drive and lunch today. went to my buddies house with the cobra and he hopped into his F430.

we did some nice pulls and man is the cobra strong.....the F430 stands no chance in straight line acceleration.....

i do not take the cobra to speeds over approx. 160 km/h....whatever speed up to that mark the cobra is one hell of a fast car.

despite the wheels spinning, the tail sliding and having to shift a rather unprecise TKO-600 tranny the cobra really flies away.

on one run, my buddy had a clear jumpstart and i was in second gear at around 1800 rpm. i thought about abandoning as i thought i would have no chance but instead just mashed the throttle. in no time i was by his side and by the time i shifted into third i was clearly walking away. massive power really....good fun !

Intouch · #2 (**permalink**) 12-22-2008, 12:48 PM

2 more pictures

CBattaglia · #3 (**permalink**) 12-22-2008, 12:52 PM

What motor are you running?

Intouch · #4 (**permalink**) 12-22-2008, 12:59 PM

Quote:

Originally Posted by CBattaglia

What motor are you running?

Roush 427 IR (8 stack injected) 559 hp and 519 tq on the dyno.

SP01715 · #5 (**permalink**) 12-22-2008, 01:16 PM

Very nice, have fun with your SPF...

Doug I · #6 (**permalink**) 12-22-2008, 01:57 PM

engine dyno or chassis dyno ?

greg schroeder · #7 (**permalink**) 12-22-2008, 02:15 PM

Nice work on the the F430 assault.

I knew that thing was faster than you thought.

Buy yourself some Mickey Thompson ET street drag radials in the 275/60 15 size. You'll love it and you'll find it's going to take some seriously modified supercars to hang with you once you get the tires to stick.

SP01715 · #8 (**permalink**) 12-22-2008, 02:47 PM

Quote:

Originally Posted by Doug I

engine dyno or chassis dyno ?

Those are at the flywheel for that motor.

greg schroeder · #9 (**permalink**) 12-22-2008, 02:53 PM

Quote:

Originally Posted by SP01715

Those are at the flywheel for that motor.

Yeah, they make about 380 to 400 at the wheels with that set up.

Intouch · #10 (**permalink**) 12-22-2008, 11:54 PM

Quote:

Originally Posted by Doug I

engine dyno or chassis dyno ?

engine dyno. i guess driveline sucks less power then mentioned above. i believe the car would surely make at least 450hp at the wheels....

otherwise it would not leave the f430 standing. the 430 has 490 hp and f1 gearbox.

Intouch · #11 (**permalink**) 12-22-2008, 11:57 PM

Quote:

Originally Posted by greg schroeder

Nice work on the the F430 assault.

I knew that thing was faster than you thought.

Buy yourself some Mickey Thompson ET street drag radials in the 275/60 15 size. You'll love it and you'll find it's going to take some seriously modified supercars to hang with you once you get the tires to stick.

hey greg, i have 17's on order with michelin pilot sports coming in. 275 front and 315 rears. should provide far more grip and traction.

on my 997 gt2 i have michelin pilot cup's. sick tires. take a while to develop grip but once nicely warmed up they stick like crazy and are still road legal.

PANAVIA · #12 (**permalink**) 12-23-2008, 12:34 AM

Great photos , truly an exotic location for a cobra, but actually closer to where it was built I guess!

any possibility of youtube videos >?

Steve

madmaxx · #13 (**permalink**) 12-23-2008, 07:12 AM

Thanks for sharing, make sure to check all your bolts, fittings etc.

86Sebring · #14 (**permalink**) 12-23-2008, 07:47 AM

no speedtraps and cops with radars in Egypt...?

cheers

Maricopa · #15 (**permalink**) 12-23-2008, 08:12 AM

the 430 has 490 hp and f1 gearbox.

And another 700-1,000lbs to haul around.

Intouch · #16 (**permalink**) 12-23-2008, 09:28 AM

Quote:

Originally Posted by Maricopa

the 430 has 490 hp and f1 gearbox.

And another 700-1,000lbs to haul around.

actually i think they are pretty equal on weight. the 430 weighs about 1500kg ans i doubt the cobra is much less than that.

Maricopa · #17 (**permalink**) 12-23-2008, 09:37 AM

Hmm, I didn't think that most SPFs were much over 2,400.

Intouch · #18 (**permalink**) 12-23-2008, 09:53 AM

Quote:

Originally Posted by Maricopa

Hmm, I didn't think that most SPFs were much over 2,400.

depends on engine.....however, they are not as light as one would assume.

greg schroeder · #19 (**permalink**) 12-23-2008, 10:12 AM

Quote:

Originally Posted by Intouch

engine dyno. i guess driveline sucks less power then mentioned above. i believe the car would surely make at least 450hp at the wheels....

otherwise it would not leave the f430 standing. the 430 has 490 hp and f1 gearbox.

Don't get me wrong, the F430 is a quick car, but there are quite a few Superformance prepped 427Rs and 427IRs that have been to the drag strip to figure HP based on trap speed and weight.

In reality the engine HP is just a number. It's the wheel HP or usable HP that will have the most influence on performance. There is variation. From what I've noticed on and about the forum a 550 HP engine in a Cobra seems to range around 330 to 480 wheel HP depending on carb, tuning, exhaust, fuel delivery and stuff like which 427 from Roush. Some of them produce quite a bit less power than the single plane intake 427R and 427IR. My Roush 427R had 561 corrected engine HP in a Superformance. As dealer prepped it produced a little over 400 corrected wheel HP. After I looked into obvious power restrictions and changed things I ended up with 475 at the wheels. This seems about were a 561HP engine should be.

Actual wheel HP comes out really close to 1/4 mile trap speed if you use a racing calculator. In other words trap speed doesn't lie. It's very consistent if you can shift through the gears.

Time for the 1/4 mile is very dependant on how well you start. Each .1 second variation in 60ft time is about .2 seconds at the end.

Here's a drag race calculator. The trap speed portion is really accurate.
http://www.prosystemsracing.com/calculate.html

The lower the DA, density altitude, the more power an engine will make. Here's a sea level correction calculator with a DA calculator built in. Using this calculator you can compare performance of the same car on diffrent days or two diffrent cars in diffrent locations. It's really cool to compare apples to apples.
http://www.modulardepot.com/density.php

Sea level corrected, a 2550lb race weight Cobra with a real 475HP at the wheels should produce a 1/4 mile trap speed of around 131 to 132 mph and with a 1.7 60ft time should be about a 10.5 or 10.6 ET. With a 1.5 60ft the time would be around 10.3 or 10.4. A 1.9 60ft time would be about a 11.1. Trap speed would remain real consistent unless you totally screwed up the pass.

The pass in the video in my signature is starting from idle and only a 1.7xx 60ft time. I had my normal daily drive Mickey Thompson ET Street drag radials in a 275/60 15 with 20 psi. A 1.7 60ft time isn't all that great.

You can check around to see the Superformance cars with the Superformance headers, Superformance side pipes and 427R or 427IR usually trap about 123 to 126 mph at the drag strip. Plug it into the calculator with average weight with a guy in the car and half tank of gas, 2550lbs and you get the HP. There was a guy that took his Superformance with 427IR to a race day a while back on the forum. The car is just like yours. I looked up the weather data for the day and corrected the data to sea level for his drag race trap speeds. It came out about 380 HP at the wheels.

SP01715 · #20 (**permalink**) 12-23-2008, 10:26 AM

Quote:

Originally Posted by Intouch

engine dyno. i guess driveline sucks less power then mentioned above. i believe the car would surely make at least 450hp at the wheels....

otherwise it would not leave the f430 standing. the 430 has 490 hp and f1 gearbox.

They dynoed a SPF a few months ago at Hillbank with a Roush 427R, and it made about 480 at the rear wheels.