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03-11-2002, 02:15 PM | #1 |
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Join Date: Sep 2001
Posts: 6
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4.6l
Hey guys!
Thanks to everyone who has been answering my questions, but I have yet another. Actually, it's more of a rumor I wonder about. I hear conflicting reports about the upgradability of the 4.6L. Some people tell me it's an untapped resource and the engine with the stock bottem end, while others say with the '03 Cobra, it will be pushed almost to the max. Which is correct? I'm thinking of getting one, but just like any car, you get too accustomed to the horsepower and want more. Could I put 450 hp to the wheels (not the crank) consistantly on pump gas with the 4.6L, neglecting Nitrous, too? I really don't want to get a new car and upgrade the valves, pistons, rods, head, etc. Thanks, Vision |
03-11-2002, 02:32 PM | #2 |
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Join Date: May 1999
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This is really much better posted in Modular Madness. I don't know enough about the reliability factors to truely advise you. If I'm correct, the DOHC's have pretty weak rods.
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03-11-2002, 02:36 PM | #3 |
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Hammers Yellow Jacket (98 GT) has around 450HP at the flywheel. He has stock internals, SVO Intake and SVO heads and a Procharger. The problem he has (and anyone else with that much power) is with the rest of the drive train. The transmission can't take that much power and will fail eventually. I imagine the DOHC cars are even better. The DOHC Cobra has forged steel crank. Not sure on the pistons or Connecting Rods though.
Unit is right, post this in Modular Madness. |
03-11-2002, 06:27 PM | #4 |
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Join Date: Jan 2001
Location: McKinney, TX
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I would give Sean Hyland Motorsports a call. They seem to push the envelope the furthest with 4.6L power. They build a ton of race motors and beefed up 4.6's for exotic cars that use them.
Sean Hyland Motorsport 691 Jack Ross Ave Woodstock, ON N4V 1B7 PH. (519)421-2291 FAX (519)421-0991 http://www.seanhylandmotorsport.com/index.html
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Strike down the unroadworthy! 2000 GT Atl. Blue: '03 Cobra motor - 465rwhp/473rwtq, T-56 6-speed, full MM TA/PH & tubular K-member suspension, Saleen body, 17" Torq-Thrust II's, M/T ET Street radials, and lots more '94 Rio Red Cobra: All the bolt-ons, 3.73s |
03-11-2002, 09:34 PM | #5 |
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Join Date: Dec 1999
Location: Warrington, PA
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The '03 Cobra will be an untapped resource.
That motor will have SO MUCH untapped potential. There are several Lightnings running 11's with only bolt on's, and thats with 2V heads and weighing 4600+lbs. I expect to see some Cobra's running 10's with out opening the engine up. Put on a drag suspension, exhaust, gears, chip, and up the boost and that should do it IMO. *Cast Iron block instead of aluminum to handle the power *new aluminum heads that flow better on the exhaust side (exactly what SC engines need) *carryover forged-steel crankshaft, which is fitted with new Manley forged "H-beam" connecting rods (the rods were the only "weak" point in the Lightning engines. Weak point I mean that they start to give out at over 500 HP. Apparently SVT is going to make sure this isn't a problem, although its something they didn't have to do.) Forged pistons similar to those in the SVT F-150 Lightning (8.5:1 cr,) and an aluminum flywheel similar to the 2000 SVT Mustang Cobra R’s. So this thing has a fully built shortblock. It should handle 18+ lbs EASY, but I can see 20+ a possiblity. Power production will only be limited by the Eaton's efficiency. So expect Kenne Bell to step up with an aftermarket blower to pump 18 lbs into that engine. So, my take on it is, YES, you should be able to hit 450RWHP if you buy a '03 Cobra. That's if the Eaton is up to it. A number of lightnings are putting down between 400-450 rwhp with bolt on's, and thats through the auto and big 9.75" rear. So take it how you want it.
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'97 T-bird LX 4.6L 2V, auto SVO heads/intake, Vortech T-trim, front mounted intercooler, blower cams, Cobra crank, Manley H-beam rods, JE pistons, Aeromotive fuel system w/ 42# injectors, and much more No times yet |
03-12-2002, 07:15 AM | #6 | |
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Re: 4.6l
Quote:
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99 Silver GT Auto DTA Built Engine w/P&P heads, TDC Turbo (T-76), Built 4R70W, PI Multi-Disc 3200 T/C, Eaton 31 Spline Carrier, Strange 31 Spline Axles, Aeromotive 1000 HP fuel system, 66lb injectors, MSD DIS4, Accel DFI Gen VII & Mac 3" cat-back. Built by Jade Performance Best on Nitto D/Rs 11.698 @ 120.898 @ 12 psi (built block) Best on Slicks 10.922 @ 122.95 (stock longblock) |
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03-12-2002, 09:57 AM | #7 |
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I think the '03 Cobra's factory ratings are very modest. All you modular guys probably know that when you strap a blower on a 4V it makes crazy horsepower. I'll bet money the '03 makes a helluva lot more than 390 at the crank. Because even with stock heads and intake the Cobras can make well over 400 RWHP with modest boost. I think Ford is keeping the factory ratings down to lower the cost to insure a Cobra and to avoid '99 Cobra incident. The hot ticket when it comes to modulars is definitley forced induction, and contrary to popular belief, the modulars are very strong even with the stock shortblock. They are stronger than most of the newer 5.0's ('93-'95 weren't as strong as the older engines). The modular engine family's potential is now starting to be realized and this is only the beginning. You can find every you'll ever need to know about the modular engines here www.seanhylandmotorsport.com/modsquad.html
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03-12-2002, 09:58 PM | #8 |
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Location: Grass Valley, CA, USA
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1200 HP
or just a bit more is what john mehovitz made last week on the dyno with an shm 4.6l cobra motor before a couple of rods went. the rods were only rated for 800 HP.
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