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5.0L POWER WITH A SUPERCHARGER?
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Posted by: 94stocksnake

I was wondering what kind of power can a make my 5.0L COBRA produce by installing a vortec supercharger? Is it worth spending the $$$$$ on it. I want to at least hit above 300hp. This car is a 94 cobra 5.0L IT HAS 105K MILES ON IT (highway miles, running mobil 1 15-50 since it had 8400miles) I had the engine compression tested and they said the engine test good on all piston 160's. Aslo I am wondering if I should invest in this car or by a 98 cobra with 75k mile on it and beef it up. Any advise would be great.

Posted by: 86pushrod

if you installed a blower on a 96-98 cobra ya could hit 500+ and still drive it every day.... on your 94 you should have no problem hitting 300 at the rear wheels... im not a fan of the vortech blowers though,... had one seize up on a freind of mine... i would get the paxton novi 2000 or a procharger if i was shopping for a blower,... as long as you keep your boost repectable you shoulnt have any detonation problems,.... if i were you i would invest in a 96-98 cobra if thats what you truley want... a 88-92 5.0 would be the faster than your 94 with a blower.... just my .02 skrent.

Posted by: Tang

I also say go with a Procharger. I have a friend (who used to frequent here) who had a '94 GT with a 10psi Procharger. His car had 127k miles, Holley Heads, Trickflow intake and I think it was an E-303 cam then 65mm throttle body etc etc etc all the stuff that ya need pretty much. .I forget the exhaust specifics but I think it had long tube headers, I know it was an off road H and a Mac Pro Dump kit because he got a ticket for it being excessivly loud.

Anyway, his car made 436 rear wheel horsepower (around 500 at the crank)on the stock computer. He never put a chip in it or had it custom tuned. it ran 7.30's in the 1/8 at around 100mph, and run 11.30-11.40 in the 1/4, both on ET streets. A shop down the road said they could turn 500 at the rear wheels with a custom tune on the dyno.

The choice of cars is really whatever you prefer. The '94 can be turned into a monster as well, but a '96-'98 Cobra, they love boost and 4.10-4.30 gears.

Another thing to look into is Turbo Kits, the prices are gettign competitive with Superchargers now. www.proturbokits.com

Hope any of this helped you

Posted by: Tang

Here is a pic of his '94 GT, since this car he has had a '98 Cobra and is now driving a '95 Cobra that he won the FFW-Street Stang class in Bristol with.

Posted by: Grape Ape

I like the 5.0, but I'd opt for the 4.6 in this case. I'd like a turbo on it, which could net over 400rwhp pretty easily, while retaining full drivability. Installing a supercharger on a 5.0 is all good, but I wouldn't suggest you'd get over 300rwhp without also installing a good set of heads. It could happen, but it might take some tuning and it might actually cost you some streetability. The 4.6DOHC is a very strong engine, needing little more than a turbo or supercharger to see well over 300rwhp. Stock, they'd make about 265 to the ground(maybe less), meaning it wouldn't take much boost to get to your goal. The problem is, your goal will become more power still once you see how easily it gets to the 1st one..

Posted by: 94stocksnake

I would like the 4.6 but I have grown to like this 5.0l. The heads on thisd car are GT-40 heads. They where ported apolished. The machine shop said that theres really isn't better heads for this engine then whats on it. I was planning on put edelbrock heads but the power increase wouldn't differ much. This car being stock other than simple machine work and a little tuning pulls 255hp at the wheels an estimated 270 at the block. Thats not all that much different from your stats that you said about the 4.6L. I am not shure if it worth spending an extra $7K for a 98 cobra and then have to put an additional $4K to super charge it to reach 400hp. I have seen a report and meet others that had the same engine with a vortec supercharger and 45lb inj. reached the 450+ HP and still be able to use it a daily driver and be able to pass Nevada emissions. Would the 4.6L pass if the work you said needed on it was done? I am still think about it but I mostly set on the 5.0L The emission requirementa are HC ppm limit:220 CO% LIMIT 1.20
CO2 LIMIT:10.70 Let me know. Thanks

Posted by: Grape Ape

Quote:


	Originally posted by 94stocksnake I would like the 4.6 but I have grown to like this 5.0l. The heads on thisd car are GT-40 heads. They where ported apolished.

I thought you said the car was stock? It doesn't matter, but I really thought I read that before...

Quote:


	Originally posted by 94stocksnake The machine shop said that theres really isn't better heads for this engine then whats on it.

You need a knew machine shop if they truly believe that. There are numerous "better" heads available than the GT40 iron head.

Quote:


	Originally posted by 94stocksnake I was planning on put edelbrock heads but the power increase wouldn't differ much.

You'd probably gain 50 REAR WHEEL HORSEPOWER by swapping to a set of Edelbrock aluminum heads and intake. Fords cast iron heads just aren't very efficient.

Quote:


	Originally posted by 94stocksnake This car being stock other than simple machine work and a little tuning pulls 255hp at the wheels an estimated 270 at the block.

That doesn't make sense to me. Even at the lowest estimated "loss rate," you'd have well over 290fwhp if you were making 255rwhp. Stock ported heads COULD manage that, but not likely with a stock intake.

Quote:


	Originally posted by 94stocksnake Thats not all that much different from your stats that you said about the 4.6L.

If you really have 255rwhp(I doubt that with stock intake), you're only "near" the 98 Cobra's level, and the Cobra is a lighter car with far more "bolt on potential" without ordering cyl. heads or other high dollar parts once you buy it's forced induction. That's not to say the 5.0 is the wrong thing, but I don't think you have all the facts and figures worked out.

Quote:


	Originally posted by 94stocksnake I am not shure if it worth spending an extra $7K for a 98 cobra and then have to put an additional $4K to super charge it to reach 400hp. I have seen a report and meet others that had the same engine with a vortec supercharger and 45lb inj. reached the 450+ HP and still be able to use it a daily driver and be able to pass Nevada emissions. Would the 4.6L pass if the work you said needed on it was done? I am still think about it but I mostly set on the 5.0L The emission requirementa are HC ppm limit:220 CO% LIMIT 1.20 CO2 LIMIT:10.70 Let me know. Thanks

I don't know what the cost difference in the cars would be. I just know the 4.6L engined car would be more drivable with a power adder than the 5.0 engined car, if both are making over 350rwhp. The 4.6L engine burns so clean, it didn't even need(or get) a smog pump. Under any conditions there are, it's going to burn cleaner than the 5.0HO will. Maybe you mean 42 lb injectors, but I'm not sure about 450+HP, since I don't know if you mean fw or rwhp. Plus, that much power isn't coming from stock headed cars, so figure on neding to spend an additional $1,000(bare minimum) on a set of new heads that would help the HO make the power the 4.6 will make with a minimal power adder and a decent tune.

I've known literally hundreds of Mustang owners and I can tell you first hand what it's like to have a 450+rwhp Mustang... It ain't no garden variety daily driver, no matter what you read or who says they think it true. In fact, with a 302c.i. supercharged 5.0HO Mustang, one should feel "lucky" if it ever reaches that power, not to mention the questionable daily driver status. It would be downright UNRULY as a daily driver and it wouldn't likely pass an emissions test(which are basically identical across America where they're used) at that power, meaning tuning again to lower power(lower fuel rate or whatever). I'd be utterly impressed to see a Mustang 5.0HO make 450rwhp while retaining catalytic converters in the 1st place. E-checks are ridiculous anyway, but some silly fool in local or state government has bought into the lies about our cars emissions levels and now many places have those stupid rules.

The s/c or a turbo cost about the same anymore, so you're not saving anything there, depending on which kit you'd prefer.

Posted by: Tang

Quote:


	The machine shop said that theres really isn't better heads for this engine then whats on it

I agree with Grape here. You got Brodix, Canfield, Tirckflow, Edlebrock, Air Flow Research, all those would blow the GT-40's out of the water.

I haven't got to use any myself, but me personally I'd go with AFR, I like what I've seen.

AFR took a bone stock '95 GT with an automatic and tested it. Stock it made 179rwhp and 226 ft/lbs of torque. With nothing more than their 165 emissions legal head, it made 218rwhp and 270ft lbs. Stock it ran the 1/4 in 16.01 @ 88mph, after the heads it ran it in 15.23 @ 93.

Then they added somore more goodies on with it. Ford Motorsports 1 5/8" Headers, Bassani 2 1/2" Exhaust, March Pulleys,RPM Performer Manifold, BBK 65mm TBI, K&N Air Filter Super Chips,Pro Magnum Roller Rockers .

This time it put down 251rwhp and 280ft lbs, and still has the stock cam. This time it ran the 1/4 in 14.48 @ 98. And that was all with their 165 head, the 185 would be better suited for blowers or nitrous.

Posted by: 94stocksnake

I could be wrong or mislead so in some things a wrote in the statement. So new heads would make a big diffence. I finaully got ahold of the fomer owner and ask what the setup was on this car. Hers the engine setup as of now: stock cobra block with the factory botton end and factory crane cam, stock gt-40 heads with machine work, edelbrock lower intake, factory Cobra intake, different MAF Sensor, 65mm throtle body, K&N filter, and air silencer removed. Some for my concern it stock. This car was placed on a dyno and pulled 255rwhp @4860rpm. As of the Estimated 270rhp I was basing it on the 15% drive train loss, correct me if it is different I know each dnyo can differ and temp can make a diffence. But thats something to go on. conditions: 85deg desert so no humity on a dynojet.
To make an additional 30-50rwhp it would be worth it to spend $1100-1250 for a new set of heads. If I put new heads on, should I have the bottom end gone through meaning: better pistons&ring setup and have new main bearings & polish the crank. The engine was a highway driver so it wasn't abused, has 106k on it will it hold up. I had a camero I had new heads on it and the bottom end gave out. At this time I can't invest the extra money for the newer cobra so I am stuck with this one so any advise to make this car a beast would help.

Posted by: Grape Ape

Edelbrock lower and a Cobra upper?

It's apparent that the engine has several modifications, so it might make the power afterall. With all the other parts mixture, it's hard to say what it can really do, but you can bet that basically any aluminum head set would allow a major hp gain.

After switching heads and adding a s/c, you'll want to consider the weak points of the engine for the future. The pistons aren't the strongest available, but upgrading isn't cheap. The block will start to suffer abuse notably, if you reach 450rwhp or more due to crank walk. Below that hp level, the block should be fine. The stock pistons may not live that long though. You may want to think about adding a crankshaft girdle to make the block last at the higher hp levels.

Posted by: 94stocksnake

thanks for your help.

Posted by: 86pushrod

it can't have an edelbrock lower,... the ports on a cobra upper are round and the edelbrock has square runners.
with the combo you just described,.. im sure it can make the numbers the previous owner claimed. twisted wedge makes some killer outta the box heads as do brodix afr and canfeilds... don't get hung up on how much heads flow(although it is important) a head with a better cross section can make more power than a head with bigger flow on your engine... heads that flow big numbers normally like lots of air and that means lots of rpm.im guessing your cars power should be in the 3000-5500 range respectivley.its a street car.
hp isn't as important as broad hp.. across the rpms. if you went with bigger heads you would need a better/bigger cam,bigger intake,to really squeeze the heads.if you simply swaped the cam heads and intake,...(you dont need to but whatever) you could see an extra 100+ hp easy with a good tune.i run nitrous on my 86 and like it more and more everytime i race.
i think you would be happy with some juice on your car how it is with some high gears,..stickey tires and some beefy axles. it would cost a hell of alot less than a huffer or new heads as well.

Later

Posted by: RacingJason

If its a real Cobra it has Gt40 heads/intake on it from the factory. And yes the Edelbrock lower/gt40 upper is not happening.

Posted by: StoneFox

Are you sure its not a Truck lower, Edelbrock upper. Im not sure but I believe that would work

Posted by: Tang

He is talkign about the Cobra intake that game on the Cobras, isnt it the same one Summit and everywhere else sales for $499 or so.

But I think it still has the staggered ports, so ignore what iw as saying...lol

Posted by: Grape Ape

<~Actually a 351 lower, but the design matches.

<~Cobra/GT40 lower.

How's that for differences... ?? :btg:

Posted by: 86pushrod

dude some one get the man his mufuckin cookie

Posted by: Tang

Hows this for 5.0 power with a Supercharger ?

Posted by: Grape Ape

It's aight I guess.... :roll:

Posted by: Tang

I'd sure be happy with it....lol

Posted by: Grape Ape

I think I would too, except for I've already got a decent setup.

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