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whats the fastest in a 4.6 have you gone i have gone 110 once but only have a shot of going a lil over 100MPH in my sig
 

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well...

I hit 115mph but it was scary as hell. The car was all over the road. I wont do it again. The car is alright up to about the 98mph mark, after that you better be holding on. It was just swaying around the road. I also dont think its to good on the stock driveshaft.

BTW: I think mine does that because I got Cobra R's on my car. Before I put them on I could get up to 100 and it was fine. Also need to replace some bushings.
 

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well I've had mine up to 125.

I would have gone higher but my driveshaft won't handle it yet I still have to get an alluminum one.;)
 

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You can hit 108- 110 in a 94 stock 4.6 in 3rd gear when you shift into 4th it cuts it down to 105 - 106. Difference in speed between driveshaft limiter and the top speed limit.


Later,
jay
 

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A few months ago...

driving back from Jery's Dyno Fest in Cali I took my
'Bird up briefly just to see what she would do. Mind
you, I had good Z-rated tires and upgraded drive shaft
among other mods, and she hunckered down and suprisingly
easily pulled to 120+ before I let off - I didn't want to
loose my oem torque convertor. With a few more mods I'm
hoping to hit 140+ by the end of the summer....we'll see.
 

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mine doesn't take very long at all

to reach 120 it gets there rather quickly if you ask me and with the assistance of the nitrous that I'm in the process of reinstaling on my car now that I have more things done to it I will be able to get it up that much and more.
 

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What a trip....

I'd love to fly one of those other "'Birds" you
work on....if I had the rating, that is.

Mager Thom CFII
 

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110mph..

but that is because I had 235/70-15 tires at the time. the speedo read 105, but my friend in my SHO said the SHO's speedo (correct) said 110mph.

btw, I thought it was 105mph?
 

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In approx 12.8 seconds I reach 109 and change in the 1/4 mile, does that count? Fastest I've gone was 120 mph because that's where the speedo stops. Also, the drag strip wasn't long enough to haul it down safely, but I think it reached 130 or so.

A-Train
 

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Cruising at 130 between Amarillo and Dallas last fall for miles at a time.
Good suspension and both hands on the wheel.
Very little vibration from my car with the 17's. It sucks down to the road at about 90 and just gets tighter.
 

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Hmmmm, I guess it's really true then....

that our "Bird's" shape really was developed for
those high speed track boys.......:D
 

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I got to 130MPH!!!! w/my 145 speedo.....had to slow down or miss my exit n/m

:D n/m
 

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140! Well, thats what the math tells me anyway..

I have a 2000 GT engine in my 94 with 3.27 gears. At 2000 rpm It's doing 70 mph. Well one Saturday night I got it up to 4000 rpm before I let off. The rate at which I was catching up to the traffic ahead of me was a trip!! Anyway if 2000 rpm is 70 mph then 4000 rpm is 140, right?


" The fast ones always ride for free" Andrew Wood- Mother Love Bone
 

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huh?

Well I dont want to start any problems but... I dont think rpms work like that. I can slam on the gas and hit 5500rpm does that mean im going 160mph? no. Let see if i can gather thought in my head here.

I believe that I faster you go the faster you engine has to spin to go that speed. (duh) But you get fiction in there and it slows stuff down. So yea your car goes 70mph @ 2000rpms but the faster you go the more fiction on your car (road/wind) So if your going at 4000rpm's that doesn't mean your going at 140mph. I hit speeds of 90-95 everyday. and i believe at 90-95 im at around 3200rpm. And I can also do 70mph @ 2000rpms So if that math works out. At 4000rpm I might only be going at 110-115mph

Well if anyone understood that they are doing good. And if you did am I right or wrong?
 

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rpms do work like that. i am reminded of a heated debate i had with a friend of mine about this years ago in regards to his mustang vs. a tbird.

this was back before i was into thunderbirds, but i still argued the point avidly. he argued that even though both had the same engine, transmission and rear end the tbird would be going slower at the same engine speed in the same gear than the mustang, due to weight. this is simply not true. there is friction that will give force against the car, but parts wont slip (except the TC) enough to get any tangible difference at speed.

so yea, IMHO you are wrong. rpms are rpms, double the rpm and you double your final speed.

also, your example of punching it from a stop and not going 150... you are still in first gear, maybe second if you are putting down some decent power. your rear tires are spinning as fast as your speedo says. true they arent going 150, but if you had the power to spin them up that fast through all the gears from a dead stop, they would be.
 

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Without getting into an incredibly...

complicated monlogue, BlackTbird96 might be approximately
correct. There are three types of drag and two forms of
drag....suffice it say, drag increases as a function of
the square of its velocity....in other words drag increases
are not linear with respect to speed...more like four times
an increase as speed doubles....despite the excellent contours
the designers gave our 'Birds for the high speed tracks,
the drag loads above 100mph are horrendous....so my GUESS
also would be around 115mph at 4000rpm....max.
 

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im not saying the drag isnt there, but you cant say that the drag is causing the driveline to slip. its simply causing the engine to work harder. if you can get the engine up to that rpm then you are indeed going that fast, the question is whether you make enough power to overcome that drag.

i guess ill ask you what you think is actually slipping, causing the speed loss.
 

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Oh no look what I started. Well I agree with MagerThom and all the techincal stuff. Thats what I was trying to say. He just made it sound better. haha :D

Edit:::
I think I have to do a test tomorrow. I will get up to 115 or so and see where my tach is. Maybe i should take a picture too :) Now, im not saying that J-rob is wrong, he might be correct but it just doesn't sound right to me. Lets all do a test and get back to this tomorrow. ha :p
 
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