RPM vs MPH

RBean20 · 07-05-2006, 09:45 PM

I have a 71 TR6 with a four speed transmission. I'm a little concerned that my tachometer isn't accurate. Right now, at 60mph, my tach reads over 4000 rpm. Does anyone know if this is accurate or normal?

I'm looking at the HVDA conversion with a Toyota 5-speed transmission. Most of the comments that I see seem to be positive.

excheezhead · 08-15-2007, 03:56 PM

Quote:

Originally Posted by RBean20

I have a 71 TR6 with a four speed transmission. I'm a little concerned that my tachometer isn't accurate. Right now, at 60mph, my tach reads over 4000 rpm. Does anyone know if this is accurate or normal?

I'm looking at the HVDA conversion with a Toyota 5-speed transmission. Most of the comments that I see seem to be positive.

i just got calibrated and at 55-60 my 73 4 spd tachs about 2500.
and what is this conversion/tranny?? it sounds like something i might do, either that or spend my retirement money on a 5 speed fron vicky!!

p.s. i changed my 50 profile tires to stock sized 205/70r15, and the tach reads 25-2600 at 55.

RBean20 · 08-15-2007, 08:25 PM

Check out the website http://www.blindmoosefab.com/hvda.htm.

my89rx7gtu · 08-20-2007, 07:07 PM

humm.
My TR6 did that 4k rpm at 60mph too.
Oh well.

-----------------
'74 TR6, Red, Weber carbs, upgraded ign. components.
Poor condition, been sitting for about 5 years, doesn't run now, ran 5 years ago, convert top and windshield smashed by a tree. I miss driving it.

excheezhead · 08-20-2007, 08:56 PM

Quote:

Originally Posted by my89rx7gtu

humm.
My TR6 did that 4k rpm at 60mph too.
Oh well.

-----------------
'74 TR6, Red, Weber carbs, upgraded ign. components.
Poor condition, been sitting for about 5 years, doesn't run now, ran 5 years ago, convert top and windshield smashed by a tree. I miss driving it.

thats a cryin' shame. res-store it don't destroy it!~!!!!!

opcorn:

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