LT1-LT4 Modifications 1993-97 Gen II Small Block V8

200mph? Can it be done?

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Old Sep 11, 2004 | 08:19 PM
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Default 200mph? Can it be done?

Ok this might sound like something stupid or dangerous, but i want to know what it would take ot break 200mph. I plan on putting in a 3.23 rear (i have a 2.73), LE stage 1 heads/cam, gasket match the intake, CAI, LT's, 3" true duals, 30lb injectors, 160 stat, descreened mas, TB bypass, and a tune.

I was wondering if this would be possible, and if so should i keep the 2.73's or install the 3.23's. From what i've done in my head, not anything extensive, the 3.23's might barely make it to 200mph as far as gearing goes if i raise the rev limiter to 6500rpm. What are everyone else's thoughts? It's a 1995 Firebird Formula with an A4 transmission.

Thanks guys,
Shawn
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Old Sep 11, 2004 | 08:24 PM
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You need about 150+ more rwhp than your probably putting out. About 550 or so would do it.
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Old Sep 11, 2004 | 08:35 PM
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Really?! That's what i dont get. In my TT 3000gt weighing like 3900lbs, i hit 186 and i just had bolts on. Now this Firebird wieghs 3420 with me in it (i weight 140) but i have a speed limiter at 115mph which i have yet to remove. I only have the mods listed in my profile, not the ones i listed above. Those should be done around January (gotta love graduation presents )
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Old Sep 11, 2004 | 08:52 PM
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For the top end, I'd keep the 2.73's. You don't need 550+ hp to make that speed happen. Hell, I've got less than 350hp, and I hit 165 with ease. Word of advise though.... don't do it. If you're hell bent on 200mph+, get yourself all the safety goodies, because chances are you're going to need them. Also, look into modding the body to create more downforce. That '95 Formula is going to turn into a frisby by about 175.

Now that I re-read your post, are you asking if it can be done how your car is now? Because the answer to that would be no. Your car probably tops out around a buck fifty right now.
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Old Sep 11, 2004 | 08:52 PM
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what your car weighs has nothing to do with it's top speed. weight affects acceleratiion quite a bit, but not top speed.
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Old Sep 11, 2004 | 08:59 PM
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Originally Posted by CaptUSA
For the top end, I'd keep the 2.73's. You don't need 550+ hp to make that speed happen. Hell, I've got less than 350hp, and I hit 165 with ease.
My car has only 340 rwhp and has been radar verified at 172 mph, It had a little more left in it so you don't need to tell ME how much hp it takes to go these speeds. My car would probably go 175 or so. However you'd be amazed at how much more hp that last 25-30 mph would take to reach 200. You might get there with only 500 rwhp but I can tell you for sure that a Mustang with 490 rwhp won't do it even with massive aero mods. It went 198 to be exact

Keep in mind I'm talking about radar verified speeds, not speedometer overly optimistic speeds
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Old Sep 11, 2004 | 09:01 PM
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vr-4's are the most amazing geared cars ive ever been in. u can easily do 90 is like the middle of 3rd gear. very nice cars. id say work on some aerodynamics.
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Old Sep 11, 2004 | 10:10 PM
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things grow exponentially not linearly. if your really searious about doing this then do some searches for NataSS Inc. he's done the 200mph mark or pretty damn close to it in his fbody. its not as easy as you make it seem.

Last edited by jrp; Sep 11, 2004 at 10:23 PM.
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Old Sep 11, 2004 | 10:17 PM
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Yeah i geared my vr4 through 4 trees dodging an already dead animal at only 50mph. With 183k miles on it the other 3/S guys an I decided it must have been the rear steering because the girl following me said the rear end hopped up in the suicide lane (i didnt swerve back), then just slide around. She showed me where i lost control then where i ran off the road. She said i held the car completely sideways the entire time until my front wheels went into the ditch. It was a good 300ft so i dont think it was a spur of the moment panic that caused the accident. It was more of "My car's AWD and AWS and i can dodge anything i want" type of thing.

Anyway, no not right now how my car is, i plan on doing those mods not listed in my sig around January or so. I am waiting to do everything at once since it will be much eaiser that way, plus i will only have to get a tune once.

BTW in the 1st gen 5spd vr4's you can go to 129mph in 3rd gear, that's what i loved - not having to shift into 4th at the end of the 1/4 mile.
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Old Sep 11, 2004 | 10:26 PM
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Yeah exponential i understand. Just like it's alot easier to go from 11's to 10's than from 10's to 9's. Why is it so hard to break 200 in an F-body? I would have thought it would have been easy with their shape.

As for aerodynamics, what can i get for more downforce? I'd rather shoot myself than put on an aluminum wing. Mine is the Formula so it doesnt have the raised spoiler. Would a trans am spoiler help any?
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Old Sep 11, 2004 | 10:35 PM
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Originally Posted by Shawn MacAnanny
Yeah exponential i understand. Just like it's alot easier to go from 11's to 10's than from 10's to 9's. Why is it so hard to break 200 in an F-body? I would have thought it would have been easy with their shape.

As for aerodynamics, what can i get for more downforce? I'd rather shoot myself than put on an aluminum wing. Mine is the Formula so it doesnt have the raised spoiler. Would a trans am spoiler help any?
A Trans Am spoiler would help ALOT. NataSS drives an SS and his stock spoiler didn't do anything. He put on an LG spoiler to help him at speed. The Trans Am Spoiler is actually VERY good at high speeds. I fully expect mine to take me as fast as I dare to go in the future.

Taping up body seems, removing side mirrors and other tricks will help alot in your top speed pursuits.Getting your car as low as possible while still retaining enough suspension travel will also help a bunch. Your just going to have to get used to the idea that going 200 is NOT like the movies. Many people will tell you they've gone 200. Very few really have. Air is violent at those speeds and your car has to be set up perfectly to do it safely.
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Old Sep 11, 2004 | 10:44 PM
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Even if you get the hp to do the job and you"re going to need about 650 hp under the hood,you have NO room for error or experimenting I mean ONE #uck-up and you are history in the making!!!I would re-think the 200 mph deal,you may never live to brag about it!!I remember when I was your age,you think different when you get a little older.
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Old Sep 11, 2004 | 10:57 PM
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Originally Posted by FASTONE
Even if you get the hp to do the job and you"re going to need about 650 hp under the hood,you have NO room for error or experimenting I mean ONE #uck-up and you are history in the making!!!I would re-think the 200 mph deal,you may never live to brag about it!!I remember when I was your age,you think different when you get a little older.
650 seems a little bit much..?
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Old Sep 11, 2004 | 11:10 PM
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In GM High Tech Performance (Jan. 2000) there is a Patriot Red Z28 owned by Michael Mooney that hit a radar verified 212 MPH! It stated in the article that once everything was set up right, they thought it was capable of 240?? It is powered by a blown and aftercooled 383 with a T-trim and 18 pounds of boost. The car made 650 at the wheels and was 6spd equipped with 2.73 gears. Just some interesting info.
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Old Sep 11, 2004 | 11:39 PM
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Yeah, dunno what the exact hp figure needed to reach 200mph would be, and it would vary depending on the particular car you're using (drag, gearing, etc). Because air drag increases exponentially at those high speeds, you might need another 50hp to go from 195 to 197mph, whereas closer down to stock performance levels 50hp would get a much bigger top speed increase.

4th gen F-bodies aren't all that aerodynamic - I read once they're not much different in drag coefficient than the 3rd gens. A Corvette has less frontal area, so the same hp vette has the potential to top out at a higher speed than your car

As for wings, you want enough aerodynamic downforce to counter any lift being created (CaptUSA's frisbee reference) but too much wing will increase drag as well, and slow the top speed.

So yes, it's possible (with the right aerodynamic mods and enough hp) but its stupid and dangerous, and NO you shouldn't try to do it. Besides, where could you ever hope to drive it that fast??
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Old Sep 12, 2004 | 02:53 AM
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Breaking 200 seems equivalent to a 10 second car. I figured i might as well be different with my goal. I live on backroads in Delaware of all places so i can get plenty of practice. No it's not safe to do that, not just for the residents sake (all 5), but because of deer and such.

If i can hit 180 i think i'll be happy. 200 is a little far i guess. I'm hoping for a mid 11 second car with $4k in mods. It can't hurt to dream. I'm only 17 so i can't afford to supercharge a 383 to 18psi right now, but i can afford to kick ricers asses. Some of them have the nerve to drive down my 1/4 gravel driveway and ask me to race.... They never win. Someone brought a Dodge Avenger the other day. I was like wtf?! Then tonight a CRX cut me off where i turn to go to my house so i had to pull into the other lane to go around. He wanted to race which of course i floored it and i lost sight of him at the speed limter.

Anyway here's my ultimate goal. I just thought of it and it's really cool... WHEEL STAND! So your sitting there at the light. The guy turns on his neon lights (i DO NOT have these) or stereo and looks over at you so you know he wants to race. He revs his engine looking around at all of the other cars. He laughs and smiles, says "I got this sh*t" to his passenger the light turn green and BOOM my front wheels come off the ground. Man that would be cool. It's 3:53am right now so I'm gonna stop talking and go to bed.
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Old Sep 12, 2004 | 06:22 AM
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Hey man. Take that $4K you've got. Sit on it a few months till it grows to be $6K. Go FI with that B, and call it a day. I'm sure you'll be more than happy w/ your ride after that.

To Racehead: I wasn't trying to sound like an ***. I see you've got a lot of experiance w/ powerful cars. But I still don't see it taking 550+. A lot of these supercars make less than that, and go 200 all day long. Notice how I casually half way apologize, but then stand by the thing I sounded like an *** for to begin with. I've got to work on that.
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Old Sep 12, 2004 | 11:13 AM
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Originally Posted by CaptUSA
To Racehead: I wasn't trying to sound like an ***. I see you've got a lot of experiance w/ powerful cars. But I still don't see it taking 550+. A lot of these supercars make less than that, and go 200 all day long. Notice how I casually half way apologize, but then stand by the thing I sounded like an *** for to begin with. I've got to work on that.
No problem. Besides I don't think you need to work on anything. When you've got something down to an artform like you do you might as well utilize it lol ! As I've said you might be right and 500 rwhp "might" get you there, but IMO it would be just barely if at all. At this point the "anywhere near stock" tires would blow themselves off of the wheels causing the car to crash into the mountains and killing all onboard

FYI the supercars that will go this fast generally are making 400+ hp and their Cd co-efficient is very very good. Much better than the .34 of the fbody, which is also pretty good. Just because a lambo with 450 hp will go this fast that doesn't mean that an fbody will.
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Old Sep 12, 2004 | 08:31 PM
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Originally Posted by Shawn MacAnanny
Anyway here's my ultimate goal. I just thought of it and it's really cool... WHEEL STAND! So your sitting there at the light. The guy turns on his neon lights (i DO NOT have these) or stereo and looks over at you so you know he wants to race. He revs his engine looking around at all of the other cars. He laughs and smiles, says "I got this sh*t" to his passenger the light turn green and BOOM my front wheels come off the ground. Man that would be cool. It's 3:53am right now so I'm gonna stop talking and go to bed.

LMFAO...somebody's been watching The Fast and The Furious too much!!! There's thins thing called traction that your gonna need to stand the front wheels up.
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Old Sep 12, 2004 | 08:57 PM
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Lol no not like that, but i would like to hop the front wheels off of the ground.
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