What is your top speed? Post your MPH and Setup!

[Hazieview]

I love all the responces!

The main reason I asked this question is because I kind of thought one more thing was unusual...

Why would you need a 160mph Speedometer and a 10,000rpm tach in a square body? I would understand if you had a blower or raced all the time but with my sb400 I can't turn more than 6000 rpms without banging it out. I have .308 gears and a 350th trani so hitting 160mph isn't very likely to say the least.

I'm thinking 120mph max speedometer and a 8,000 rpm max would be just fine. I say 8,000 because it is hard to find a 7000rpm in 5" for a good price.

Thanks for the replies guys! Can anybody run 160mph and 10000rpms? That something I would love to see!

[gchemist]

3100 RPMs, 700R4, 3.08 gears, 27" tire = 115.5 MPH. The ZZ4 still has power. I'm curious if it can hit 3400-3800 RPMs (126-134 MPH) I'm still scared of taking it over 3100 RPMs. I need a salt flat or track. A few more mods and I'll push it more.

[3r!c84]

Originally Posted by Hazieview

I love all the responces!

The main reason I asked this question is because I kind of thought one more thing was unusual...

Why would you need a 160mph Speedometer and a 10,000rpm tach in a square body? I would understand if you had a blower or raced all the time but with my sb400 I can't turn more than 6000 rpms without banging it out. I have .308 gears and a 350th trani so hitting 160mph isn't very likely to say the least.

I'm thinking 120mph max speedometer and a 8,000 rpm max would be just fine. I say 8,000 because it is hard to find a 7000rpm in 5" for a good price.

Thanks for the replies guys! Can anybody run 160mph and
10000rpms? That something I would love to see!

pm me with more info on your 400sbc

[piecesparts]

I have a 700 R4 tranny, 3.73 gears, 383 stroker engine, 28" rear tires and I run at 70 MPH at 2500 RPMs. I can run clear off of the speedo at 2800 to 2900 RPMs. I have no need to run 3100 RPMs and really do not desire to.

[1985-GMC]

I got about where the 95 mark would be in my old dually with 4.10 gears, and 31" tires but without a tach I didn't want to push it much farther, and the speedo read about 5 under to begin with. It was a mild built 454 and it would get there pretty quick especially when I would take off in 3rd and only shift once at 55 to 4th.

[GmtGmt]

anyone know what top speed would be on with a N/A 6.2 Diesel 4 Speed no overdrive with 4.10 gears and 235/85/16 wheels its a crew cab big dooley

[GMC91]

I had a 100MPH speedo in my 76 and it was circling back around and hit 10. So I really have no clue exactly how fast, but I was passing interstate ppl like they were in reverse. SBC350 .040 over with a built TH350 and 3.08 rear end.

[hotrod_991]

fastest I have had my 77 long bed was when if first got it from my dad and it still have the old 305 punched 60 over with a cam. TH350 and unknown gears. was abotu 110 i took the pic at 100 then gave her alil more and slowed down.

[moneyeater]

When i had my baby on the dyno it made 243.2 hp at the wheels and 218 km/h wich would be 135 mph!
the dyno is not representative for real streetaction and driving over 100 mph requires a second pair of pants but i think 120 would be possible on the autobahn!
I have a worn out 1968 carter 625 cfm carb, a stock th 350 and 3.08 gears.
Volker

[willett]

i got my '78 up to 85 or 90 once. (140 km/h). 454, turbo 400 and 3.73 on 35" mud terrains.

the hood started to shake and for a brief moment it felt like the truck was hovering off of the ground.


forgot to mention.
650 cfm eddelbrock 4 barrel carb

[von guido]

Originally Posted by Hazieview

I love all the responces!

The main reason I asked this question is because I kind of thought one more thing was unusual...

Why would you need a 160mph Speedometer and a 10,000rpm tach in a square body? I would understand if you had a blower or raced all the time but with my sb400 I can't turn more than 6000 rpms without banging it out. I have .308 gears and a 350th trani so hitting 160mph isn't very likely to say the least.

I'm thinking 120mph max speedometer and a 8,000 rpm max would be just fine. I say 8,000 because it is hard to find a 7000rpm in 5" for a good price.

Thanks for the replies guys! Can anybody run 160mph and 10000rpms? That something I would love to see!

there are reasons tachs go up that high. my old super gas camaro had a 6000rpm stall and the 7al limiter was at 9000rpm.

[78 Chevyrado]

Originally Posted by Hazieview

I love all the responces!

The main reason I asked this question is because I kind of thought one more thing was unusual...

Why would you need a 160mph Speedometer and a 10,000rpm tach in a square body? I would understand if you had a blower or raced all the time but with my sb400 I can't turn more than 6000 rpms without banging it out. I have .308 gears and a 350th trani so hitting 160mph isn't very likely to say the least.

I'm thinking 120mph max speedometer and a 8,000 rpm max would be just fine. I say 8,000 because it is hard to find a 7000rpm in 5" for a good price.

Thanks for the replies guys! Can anybody run 160mph and 10000rpms? That something I would love to see!

Most of them are for show. It's like in my 87 1/2 ton while I never went over 80MPH, I hated that 85MPH speedo and wished I had the 100MPH one like I do in my 78.

While they do have a purpose and there are vehicles that would use the entire range, it's extremely limited and are for show on most cars.

I never saw a street car of any kind run 9,000 RPM or even 8 for that matter. Even the 8k tach is overkill in 90% or more cars. Most v8s dont go over 4500RPM, and even the bad motor scooters usually top out around 6500RPM. Seems the most common warmed over engines redline at around 5500RPM.


If I could find one, I'd love to have a 5k tach as I have an 8k tach and never been over 4500RPM in my truck, that's just all that's available in small tachs.


My focus has a 7k tach and its green all the way to 7k RPMS, but it has a 140MPH speedo and the cars governor cuts off at 105.

[camshaftgsxr]

Top speed for mine is 120ish beside a Mercedes (speed checker) is was pushing it she's a real beast to handle above 75.

Quick question, with 3.42 gears and a 700r4 what rpm should I see at 65 mph I can't figure out the math please pm the links to me as not to clutter this thread up

[gchemist]

If you are running a 28" tire, then 1900 RPMs = 65.5 MPH.
If the engine speed (for this example) RPM = 6000 revolutions/minute, then the driveshaft speed is the engine speed divided by tranny gear ratio R1 = ( 6000 / R1) revolutions/minute,and the rear axle speed is the driveshaft speed divided by rear-end ratio R2 = ( 6000 / (R1*R2) ) revolutions per minute. (Note: the symbol * indicates multiplication, and / indicates division)

So, the rear tire will be making 6000 / (R1*R2) revolutions each minute, causing the car to move forward (2*pi*r) * ( 6000 / (R1*R2) ) inches/minute (where r is the loaded tire radius in inches, and 2*pi = 6.28).

That is, the car will be moving ( 6000 * 6.28 * r) / (R1*R2) inches per minute.

Since 1 mile = 5280 feet = 63,360 inches, and 1 hour = 60 minutes, then the conversion from inches per minute to miles per hour is ( 60 / 63,360 ).

So, if the engine is turning 6000 rev/min then the car must be going (60 / 63,360) * ( ( 6000 * 6.28 * r) / (R1*R2) miles/hour.

Rewriting that all into a tidy form:

(0.00595) * (RPM * r) / (R1 * R2) = vehicle speed in miles/hour

where:
RPM = engine speed, in revolutions/minute
r = loaded tire radius (wheel center to pavement), in inches
R1 = transmission gear ratio
R2 = rear axle ratio

Get it? Okay use this http://wahiduddin.net/calc/calc_speed_rpm.htm

[big10ratrod77]

well its a stock 77 big 10 350/sm465/3.73 and 28's and ive had it wound past 100 pointing stright down and i figure like 130 as a guess? if i had a t5 five speed and a looooong enough strech of road i could crack 160... it would be tearably scary couse i might start loseing metal or somthing but yea it would do it if i could keep it between the ditches lol

[team39763]

Originally Posted by jrcaprai

What Cam, Rear end Gears, Tire Size, are you running? long bed, or Short bed?

It's was a 226/228 EFI cam from Nelson Performance. 4.56 gears, 28X10.5 slicks, and it's a shortbed. It was a slug out of the hole but ran good on the top end.

[Matt Man]

chevy c30 454/400 3:73 had it up to about 90 have no need to speed really... the motor was screamin.

[78GMC SIERRA CLASSIC]

I don't hit stop speed cause im a good driver

[silversnail86]

I know this thread is a few years old, but seein' as I just pulled 126 M.P.H. in my 86' I had to put it somewhere.
It's 364 cu. in. 10.5:1, 416 heads ported(305 h.o. heads), comp XE268 cam. Oh and T-5 and 28 in tires. 4th gear and 4150 rpms, it has a little more but I was getting close to my exit. And I gotta say, to those of you afraid to go over 100 in your truck, that's just sad.

[l1l]

well , I was looking through all the responds and guess what, no one had ever push his engine to the limit, check the following video out, its big block 454 long bed step side killing a porsche at almost 200 miles.

tell me what you think, and excuse the music

http://youtu.be/prAydy9W0Xc

[silversnail86]

That's kmh not mph so it's only 160 mph, still impressive though.

[INSIDIOUS '86]

Out mine to 135mph in a deserted hwy. had 308 gears and the wind stopped it cold at 130 and I had 1000rpm left of power and this was before beeing lowered. Looking forward to trying again with the 373s and after I've dropped it
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[78maliburat]

45 mph tops

[PAWS 72]

With the 400 that we had in the 72 back around 1988 the father in law floated the valves at 115.State trooper friend was behind us.

[meatwagon83]

i've had my needle pointing straight down quite a few times, not sure how fast that is, 83 crew cab dually 454 thumper cam, holly 770sa, air gap rpm, roller rockers, headers and a stock bottom end, th400 3.73 rear gears, 30 inch tall tires