Wsmatau said:The new Whipplecharger is supposed to turn between 500-550 RWHP on the 3-valve 4.6 and sell for $4500.
Rootus said:500-550 rwhp??? For about 5 seconds...
Dave
I wasn't. I was laughing. This whole whipple thing is just getting out of hand.Wsmatau said:Dave, no need to be an @sshole.
That should be your first clue. 6-7 psi on a 300 horsepower motor under optimal conditions could get you to 440 horsepower (flywheel). If you want 500-550 at the wheels, you are going to need something more along the lines of 15-18 psi.I'm just relaying what I was told by whipplecharger. They said 500-550 HP at the wheels at 6-7psi.
Cobras take a lot more than 6-7 psi to get to 500+ at the wheels. Stock boost is about 8 psi.Those #s seem a little high, but not unbelievable considering what '04 Cobras are doing with aftermarket twin-screws.
I learned that lesson when I lost my '94 Cobra....lol.Rootus said:IMO a realistic target for a Whipple supercharged GT (stock engine) is 375-425 rwhp. And save your pennies -- anybody who thinks they are just going to strap on a $5k whipple and be done with it is being overly optimistic. Horsepower is expensive.
Dave
Wsmatau said:I learned that lesson when I lost my '94 Cobra....lol.
Everything you are saying is true, but, the '04 Cobras that have Whipple/Kenne Bell superchargers are putting out 600+ RWHP. I don't thhink it is that big a stretch to approach 500 HP with the 3-valve. You are right that the internals in the '05 are not up to the '04 Cobra specs and probably shouldn't be pushed that hard. I don't have any experience with the new tranny and that is something I hadn't considered. After all the hassle I've had ordering this car, I'm thinking what I knew beforehand....I should just wait for the new Cobra.I suppose I was overly optimistic with what Whipple told me. I'm interested to see.
Rootus said:I wasn't. I was laughing. This whole whipple thing is just getting out of hand.
That should be your first clue. 6-7 psi on a 300 horsepower motor under optimal conditions could get you to 440 horsepower (flywheel). If you want 500-550 at the wheels, you are going to need something more along the lines of 15-18 psi.
Cobras take a lot more than 6-7 psi to get to 500+ at the wheels. Stock boost is about 8 psi.
And comparing the 2005 GT to a 2004 Cobra is folly. Just because the Cobra can put down those numbers easily enough does not mean that the GT can do the same. The block on the GT is strong enough, but the rotating assembly is built for natural aspiration, not forced induction. The GT has what, 9.8:1 compression? You try putting 15 psi through that. I stand by my earlier estimate -- 5 seconds. Now if you want to drop the compression to 8.5:1 and rebuild the engine with forged internals, *then* you can talk about making 500-550 rwhp with the GT. Remember that those power levels will also make short work of the 3650 tranny though, so add that to the list .
IMO a realistic target for a Whipple supercharged GT (stock engine) is 375-425 rwhp. And save your pennies -- anybody who thinks they are just going to strap on a $5k whipple and be done with it is being overly optimistic. Horsepower is expensive.
Dave
I know better than to say this on a website like thisMrDrezzUp said:I have been trying to decide between an 05 GT and an 03-04 Cobra for months. I like the 05 GT but I can't get my mind around the 430HP ceiling, and the 600 RWHP+ (on race gas) for a Cobra sends tingles down my spine!
My present plan is to buy an 05 GT, drop a Whipple/KB blower on it and hope I blow the bottom end! ;-) That will force me to buy a 8.5 CR forged shortblock!
Wsmatau said:I know better than to say this on a website like thisbut here goes...
I'm of the school that much more than 400 RWHP is pretty much useless on the street. I tend to shy away from the strip and if I do take my Stang to the races I normally go to an open track event. I'm not a good enough driver to effectively use 600hp, but I imagine 1/2 the guys that actually have those powerful cars aren't either but just won't admit it...
If anyone sees the official KB press releases soon...please post them up or provide a link.
Thanks
MrDrezzUp said:Wsmatau, there is no rolling of the eyes going on with me! I am in desperate need of information and opinions such as what you have just given. As someone who hasn't drivin anything high powered (other than slightly modified Mustangs and Corvettes) I openly confess to having NO IDEA as to how much power I should be shooting for. I read in a Mustang article once an author stating that anything over 500-550 HP was basically useless for the street. If 430 RWHP is sufficient (once again I have no idea) then whether or not to get an 03-04 Cobra or a 2005 Mustang is no longer a concern as I would simply get the 05 GT.
Wsmatau said:I was in the same boat a few years back. I wanted a stroked 351 dropped into my 94 Cobra when the guy at the performance shop asked me if I really had any idea what I was getting into. He was nice enough to let me drive his 347 which "Only" had 375 HP. It changed my mind pretty quickly. That is what Mustang clubs are really good for. Don't get caught up in the hype of magazine build-ups or peak numbers. Everyone I've ever spoken to that had a KB absolutely loved it. No, it won't put out the biggest numbers, but it is fun and more HP than anyone on the street will ever use IMHO. Spend the extra money on something like Skip Barber/ Bondurant and learn to use what you have to it's full potential. You'll win more races that you weren't supposed to (vs Corvettes/Vipers) than you'll lose. And you'll have a ton of fun at driving school.
Horsepower is VERY expensive (ususally breaking/replacing other parts behind the engine). If you can find a car (i.e 2004 Cobra) that is reliable or even warranted that makes you happy, then you do not have to deal with the grief that goes along with trying to be the biggest dog on the block.
Rootus said:The GT has what, 9.8:1 compression? You try putting 15 psi through that.
Dave
racinready300ex said:One thing your not thinking is that the 9.8:1 will make the same power as the 8.5:1 motor with much less boost. You won't need to run 15 psi, you can probably get similar results with 8 psi. It'll probably be harder to tune, but will make power. Also the pistons should hold up pretty good as long as they don't see any spark knock.
For a example, I could probably dig up the spec's of a guy in perto rico with a 2.5 ltr sti. Stock short block has the hyperwhatever pistons in them. He made 500 awhp on the dyno and trapped like 128 mph. The 6 speed tranny was hurting it, he damn near needed to shift into 6th before the end. Now that was a low compression motor, and he was probably running a bit over 20 psi of boost. But, that shows you don't need forged to make good power.
(note: I still think forged is the way to go, but that doesn't you can't make the power on the hypercrap pistons either.)
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