RPM at MPH

[5.0zone]

I have a 88 4speed without a tach.
I was wondering if someone could tell me what RPM the motor is turning at 55mph, 65mph and 70mph in 4th gear.

Thanks

[festivaWES]

I have no idea I don't drive my festiva often enough to give you an accurate answer, but i kknow someone will chime in. Go get a tacho cluster and swap it.

[Damkid]

not sure what the MPH is but at 4000 rpm in 4th i'm doin roughly 120 - 125 KPH, and around 3000 rpm it's around 100 KPH, tomorrow on my way to work i'll find out more for ya

[5.0zone]

Ok guy's. If it wouldn't be too much trouble, on your way to work this week could someone please get me these numbers?
Thanks a bunch.

[packrat427]

I will make you a little vid on the way to work this morning
I was going to do it the other day , sorry .

[packrat427]

Not real sure if this will help Jeff , but here was one at 5:45 am , and one when I got off at 3 PM .

remember this is a 5 speed .
This video on top worked after I downloaded it ?? now it will not play, click the pic to the right , if it does not play >>



Yes you can hear the speedo cable in this one , it was 15 degrees , and it only does it for a mile or so .
:lol:

[ajb999]

15 degrees and you didn't even let it warm up? jk. 10 minutes of warming up and mine reads like it was just started.

[5.0zone]

Doug, that was awesome :shock:

I wasn't looking for maxed out numbers though.

Since mine doesn't have a tach, I was just wondering what the RPMs were at different highway speeds in 4th gear.

[packrat427]

Sorry I could not resist , that is how I drive all the time .
Looks like 74 MPH @3,500 RPM's in 4th .

[Diego]

I spin about 3800 at 70mph in my 4 speed

[muscle_Car1]

What tire size you guys running?

[Damkid]

okay, on my way to work today i left my car fourth to get some numbers for ya, hopefully this is what you're looking for

45MPH @ 2400rpm
50MPH @ 2700rpm
55MPH @ 2900rpm
60MPH @ 3200rpm
65MPH @ 3500rpm
70MPH @ 3750rpm
75MPH @ 4000rpm
80MPH @ 4300rpm

now keep in mind my speedo is in KPH and i was looking at the small numbers for MPH and trying to watch the road and see my tach at the same time so the speed @ rpm's might be a hair off but it should be very close

by the way i got my stock 12 inch tires on the car too

[packrat427]

175 /70/13 on mine

[5.0zone]

Damkid, THANK YOU! , thats just what I was looking for. 80? - you went above and beyond the call of duty.

Packrat, I like the Camaro burnout vids.
Being the Chevy guy you are, what about taking the drivetrain out of the new 305hp Impala's and putting in the rear of a Festy?

[packrat427]

It is a small enough package to fit , but I am not sure what kind of suspension to fab for it , to make it work from a FWD to a RWD set up .

How about a AWD set up from a SS Trailblazer 396 hp . OH YEAH