LS1 vs. Cobra motor?
There is LS6 blocks but that alone doesn't make power. Just thought I'd clarify that.
As far as comparing a ZO6 to a stang, that is a sin my friend and you need to repent.
Not even in the same ballpark, the ZO6 is ions ahead of the stang.
If GM only could bring back the camaro with LS2 as Z28 base and LS7 for SS.
Now those would be some *** whooping power.
Immagine a stock 427 SS against a stock 06 SVO Cobra.

The ls1 is the pinacle of performance for the 5.7 and in this sense is perfection.
-chris
A well written post. So much of what is written on this thread is by guys ignorant of a lot of facts. Fords mod motor truely sucks. It has horrible flow which is why it will not make power without FI.
MT just tested the new mustang stripped down "race car" with the 5.0 Cammer engine(a bored out na cobra engine) and it barely ran high 13's in the quarter. Sean Hyland is the guru of these engines and he only gets 400 flywheel hp out of the dohc 4.6. You can take a 4.8 ls truck motor put in an ls 6 cam and ported heads and get 400 hp easy. The europeans do the same thing all the time...they have high horsepower, high rpm multivalve engines that have low torque numbers and get poorer mileage than gms old fashioned engines. Also take one on these high tech motors and drop the clutch at 5,000 revs a few times ( which you have to do to compete against american cars) and the clutch and or driveline needs thousands of dollars worth of repairs. It reminds me of the spaceshuttle compared to how Burt Rutaan is doing it. Anyway thanks for some intelligent dialog. By the way, I have an 03 cobra with bell blower & 504 rwhp and blew the head gaskets at 9000 miles with only 14 lbs of boost. chuck
Im a GM guy by nature..I know my car pretty well.
The last time I was at the track my LS1 ran 12.7xx at around 113.
I had an 01 LS6 cam,intake,lid,Mac mids/ORP/cutout,& 3.73's..the car put down 363 rwhp.
My brother bought an '04 Cobra...His car bone-stock put down 365 rwhp,& was just about as fast..
With a basic cold air,2.80 pully(14lbs),bassani catted X, Borla stingers,Accufab TB,& a predator 91 octane pulley tune..It made 451 RWHP..& ran 12.2 flat at 116...at nearly 6000 ft DA!
03-04 Cobras flat freakin' rock!
Are they better than LS1 powered anything?At stock levels they're pretty close..But who leaves their **** stock?I was amazed how easy it was to bolt on some serious power to a supercharged cobra compared to my F-body.
When I get my car back on the road,I'm hoping to just stay ahead of avarage pullied Cobras...Not to mention the fact that nearly every Cobra I know of in town is running at least a 50-75 shot.Encounter one with a KB or a Whipple & stand the **** by..They are stupid fast..(600 RWHP on 14lbs is not unheard of)
They will be legendary in the way of 86-87 turbo Buicks..
They do have some durability issues,as my brother can attest(the piston thing)But that's avoided by cooling system upgrades & minimizing top end banzai runs on hot days.
LS1's arnt immune from problems either..Bent valves/pushrods,high oil consumption,piston slap,etc..The cars they are installed in arnt perfect either..Weak 10 bolts come to mind. I've experienced all of those.
But after all's said & done..Im still a GM guy & I will make my **** work..It's lighter,more aerodynamic,handles well,stops great(with aftermarket rotors)..& best of all,it's paid for!
My brother still owes 30 k..
Last edited by BYE RICE; Mar 13, 2005 at 05:31 PM.
It is tough as nails to get the foxbodies quicker than 12's n/a! Uhh most likley..
My buddy with a '99 snake needed 4.10's & full exhuast to just keep up with me when I was mostly stock..
As far as I know,'03 was the first year Ford built a N/A 32v car(Mach 1) that was competitive against stock LS1 F bodies.(Not including 2000 Cobra R's)
The Best V8 Stories One Small Block at Time
<This is what any Mustang kill receives from me, it is really a #1 for GM lol!The reference to the Vette makes it in on page 65. Here is the reference paragraph in its entirety:
If you crave huge amounts of additional power along with Saleen's other alterations, that's entirely possible. Though not quite ready for press evaluation, Saleen's 400-bhp S281 Supercharged is claimed to go toe-to-toe with a C6 Corvette, and the S281 Extreme should be in the 500-bhp range. With all sort of V-8 urge, the better-located rear axle should prove useful.
Here is the best Ford has to offer so far that is tested, (same article)
Test results of the 440bhp GT-R and the 475bhp Shelby GT-500E they are $175K and $147K respectively. ?? The GT and Steeda numbers are not worth posting lol!
Mustang GT-R 0-60= 5.0sec. 1/4mile= 13.6sec. @104.2mph Wt.3700lb.
Shelby GT-500E 0-60= 4.2sec. 1/4mile= 12.5sec. @114.0mph Wt.3500lb.
Those Shelby numbers look like a stock C6 numbers for $147K. Get a load of the fat porky weights. The GT and Steeda top the scales at 3560lb. each lol! Give me that C6 and $900 for a cam, valvesprings and pushrods, and I can make all those Stangs, even the Saleen S281 Extreme, see my taillights through a pair of binoculars, naturally aspirated, because they will need a telescope if the C6 gets a supercharger to make it an even playing field.
Gee, a supercharged LS7 C6 ZO6....................Ford will need to rent the Spaceshuttle with an uplink to Hubble to see those taillights.
<Ford Last edited by zo6vetteman2003; Mar 13, 2005 at 06:23 AM.
Anyway, give me Chevy High Performance mag. or GM High Tech Performance mag. any day of the week.
I see all the Mustang guys in the letters to the editor complaining when they found out that the new, redesigned Mustang was 500lbs. too heavy. Damn, can't blame them, have to blame Ford.
Last edited by zo6vetteman2003; Mar 13, 2005 at 07:19 AM.
There is LS6 blocks but that alone doesn't make power. Just thought I'd clarify that.
As far as comparing a ZO6 to a stang, that is a sin my friend and you need to repent.
Not even in the same ballpark, the ZO6 is ions ahead of the stang.
This topic has been beat to death. I have all the respect in the world for the Cobra motor's. Most issues with modded Cobra's have to do with the drivers not knowing how to drive, those positive displacement superchargers lay down massive torque in modded form right off idle, that makes them really hard to stick.
As far as the NA 4.6's go, you have to be willing to spend bucket load's of money on them to get decent power out of them. Go to www.modularpowerhouse.com & look at their heavy hitter's. They are dumping bucket loads of money in them to try to squeeze them into the 9's. It's taking built motor's & shitload's of boost for them to do it. They are getting there & I have all the respect in the world for what they are doing with their rides, but the cost associated with them to get in the 600 rwhp area is phenominal. My car is a stock bottom end, H/C + spray car that makes the power their heavy hitters are making for probably less than half the price of a built 4.6 & that doesn't include the blower's that they are using. I don't know if I've seen any NA 4.6 motor making a streetable 400 RWHP & that includes the pre 03 DOHC Cobra's.
Dollar for dollar, pound for pound, LS1's win in my book. Would I take an 03, 04 Cobra or any Gen II Lightning, hell yeah.
It is tough as nails to get the foxbodies quicker than 12's n/a!
Built 351's N/A = 9's
This topic has been beat to death. I have all the respect in the world for the Cobra motor's. Most issues with modded Cobra's have to do with the drivers not knowing how to drive, those positive displacement superchargers lay down massive torque in modded form right off idle, that makes them really hard to stick.
As far as the NA 4.6's go, you have to be willing to spend bucket load's of money on them to get decent power out of them. Go to www.modularpowerhouse.com & look at their heavy hitter's. They are dumping bucket loads of money in them to try to squeeze them into the 9's. It's taking built motor's & shitload's of boost for them to do it. They are getting there & I have all the respect in the world for what they are doing with their rides, but the cost associated with them to get in the 600 rwhp area is phenominal. My car is a stock bottom end, H/C + spray car that makes the power their heavy hitters are making for probably less than half the price of a built 4.6 & that doesn't include the blower's that they are using. I don't know if I've seen any NA 4.6 motor making a streetable 400 RWHP & that includes the pre 03 DOHC Cobra's.
Dollar for dollar, pound for pound, LS1's win in my book. Would I take an 03, 04 Cobra or any Gen II Lightning, hell yeah.
will allways be one step ahead of ford in engine design and biulding.Let see me a new ford do 400hp with a cam only useing new ford pony and by the way thanks ford for byeting are ls1 intake and now they whant to do their motors all aluminuem like ls1's since 1997.That's a big *** step behind GM ,born a GM man will die a GM man 
what rock are you living under?
try 2 x 5psi, C5's run 9 - 10 psi stock bottom end with a good tune no problem. put an ATI/Vortech on a C5 stock bottom end and 550rwhp is not hard. most start having problems around 12psi.
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