I believe several years ago someone claimed 186 MPH to be the mechanical limit.

HP increased to 400 Crank HP and 6300 RPM ought to get close to 200.

 

You are probably right about that. An example I heard from a long time participant there, "Joe Dirt", went like this....A factory ZO6 Vette will do 186mph but you need another 300HP to break 200MPH....WOW, That would be 800HP! I don't think I can squeeze 800 out of a 55 AMG.....

 

Even if true; I think you'd need more than a mile to get it there.

 

I just checked the list of "200 MPH Club" members list HERE and didn't see any Crossfires listed, or Mercedes either. Dang, we need to change that stat....Right?

 

You need HP to reach 200mph. I have banged 160 in a mile more than once now. That next 40 mph will take some serious HP to push it up there. I hope they have some stopping room. And mike lowered the car and that seems to have a negative affect on top end from what I have heard. We shall see.

 

Yes you would.

And better thana mile to safely stop.

Not recommeded on a public road and few tracks will let you just bring your street car and try.

Look, at 180 MPH the 1/10 mile markers will pass by at one every 2 seconds
That's one Mississippi two Mississippi,. You will go 528 feet just moving your foot from the accelerator to the brake pedal.
(BTW don't do that bad bad Karma)

 

Need to be positive. Everyone should be behind a tribute run for Mike. He would love to see his car trying to break the 200 mph barrier.

 

So how tall a tire can we get on them for that "little bit" more?

And good to see you back with us StevE55 ... Do want to apologize for the knee jerk response when you first signed on! By the way, when the car was being sold if I'm not mistaken the stock hood was available with it.. We have a member who wrinkled his recently there in Texas and thought about you... did you by chance get that with the car?

 

I would agree but who will do it. StevE55 isn't likely to try, I already have two Crossies and no money to buy a third one.

Who's up for it?

It''ll take 330 HP at the wheel, a good flat stretch of unused road, nerves of steel or foolishness.

Sounds like you're qualified

 

Think that was StevE55 's intent.. but at TMS if memory serves correctly.. Thus the engine swap.

 

Whoah! I missed something here.i didn't see where StevE55 was moving forward with the engine swap..

Frankly that makes no sense. Not on a rare SRT when a cheaper NA (with an SRTSpeedo) would give the same results.Swap the engine,,,,upgrade the rear end and the brakes, pay your life insurance, sacrifice a lamb,,,,,,good to go

 

Correction, Texas Mile is where he plans to do it. Texas Mile is in South Texas.

 

400hp at the crank? Not likely. There are cars here that claim 400hp at the wheels aren't there?

 

You nailed it doc, serious HP is key...and yes ~Taller back tires will help to offset the lack of taller gear.
If you click here>> Texas Mile and dig a little you can see most of these guys are at 1000 - 1500HP.
I don't know that I will ever get to scratch this one off the bucket list but at my age the chase is what makes me tick right now and the effort for the skipper will be worth it... Way back in the Pantera glory days I visited the 180s several times and it was like warp speed sensation, tunnel vision like, just anxious to experience my youth again albeit a few seconds at a time.
HOOD, yes I did get the metal hood but believe it or not I'm toying with the idea of modding and putting it back on & off with the CF hood. Would your friend be interested in the CF hood?

 

Yes he would very much.. he's actually made a post in search of. Here's the link to his post.

https://www.crossfireforum.org/forum...ont-facia.html

 

You may well be right Dave. You know this stuff better'an anybody. I do not wish to argue with the mastert:

But then ole master of the numbers, I would suggest that the E55 SC would not make it happen either.

As I recall we have a 25% loss of power in the drive train. Taller gears will make that less.
Unless I have the wrong engine in mind that 465 HP will put about 350 HP at the wheel. Even the SC v/8 with 494 HP just barely gets you to 400HP at the Wheel.

Perhaps with over 500 Foot lbs of torque it will still get there.

 

I know nothing about this at all, but you slipped and said 400 at the crank, they have 330/349(?) at the crank off the assembly line.

 

Now you are making no sense. I said I believed one would need 400 HP at the crank to approach 200MPH. A guess yes. But why does that entitle you to be so onery?.

Obviosly the SRT6 does not come with that power. But, as you stated, some have tuned and modded them well over 400 HP to acheive 400HP at the wheel.

So explain how I "slipped" here.

If, by your claim, 400 HP at the wheel will not acheive 200MPH, then by your estimation, what will? And what crank HP would be required to acheive that on our SRT6 drive trains?

I would suggest if StevE55 were to invest a gosh awfull pile of money in his attempt, you might be helpful in educating him as to how far that engine swap has to go to succeed. Jus' sayin.

 

I am not getting into a pi$$ing match here, but you said 400 at the crank and later 330 at the wheel. That's only a loss of 70 hp = 17%. Later you use these figures.

Quote:

As I recall we have a 25% loss of power in the drive train. Taller gears will make that less.
Unless I have the wrong engine in mind that 465 HP will put about 350 HP at the wheel. Even the SC v/8 with 494 HP just barely gets you to 400HP at the Wheel.

This is a much higher loss, and the faster you go the losses keep multiplying. they do not go up in a fixed ratio. The drive train losses keep going up and resistance of all forms keep going up at the same time. You could say push a car from zero to 2mph but you could not push the car from 100 to 102 mph if you were standing on flat bed truck doing 100mph and pushing the car on the truck bed.

At these speeds losses are getting to 40% I'd guess.

 

It depends on 3 things:

• cross sectional area
• drag co-efficient
• power to the ground at that particular speed

There is an equation for drag-limited top speed:


Multiply 53.26 by the cubic root of power divided by the product of the drag coefficient and the area. That gives you the top speed for a particular power. Rearranged for power to go 200 mph:
hp=Cd*A*(200/53.26)^3

A super aerodynamic Bonneville racer might only need 100 hp to go 200 mph. On the other hand, a semi would need more than 4000. For normal cars, it will be between about 400 and 550 hp. And these are power numbers at the wheel, at that speed. You can't even use peak wheel hp. Power changes with rpms so while a car may peak at 500 rwhp @6000 rpm, odds are it won't be turning 6000 rpm @200 mph. For example, a manual Camaro SS would be turning 4620 rpm with the stock gearing and tire size. So you will need more peak power then you thought, in the case of the Camaro about 650 rwhp @5900 rpm.

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