Replies to this message are sent to The Chevelle Mailing List
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First I thought you were talking about me, before I seen the included
past-post....
I forgot to mention the necessary tire size when quoting RPM's, MPH's and
gear ratios. I'm running a 245/60-R15 tires in the rear. I just bought a
speedometer ratio adapter to finally get my speedo to show correct, but when
I gave them the numbers, I quoted a 255/60-R15 tire, since that is what I'm
going to buy shortly...simply to drop the RPM's a bit...it'll drop them
around 50-75rpm or so from what I have now.
Other Tom is using P275's....so his RPM's would be lower...the numbers seem
to make sense to me. As with my 245's, I'm running about 2800rpm at around
50mph.
Tom
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Tom's 1966 Chevelle SS
http://home.earthlink.net/~tmagyar/chevelle
----- Original Message -----
From: "Clifford E Klimas" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Wednesday, July 25, 2001 11:42 AM
Subject: Re: [Chevelle-List] 4.10 gears
>
> Replies to this message are sent to The Chevelle Mailing List
> ------------------------------------------------------------
>
> Hey Tom -
> Are you sure your speedo and tach are reading right? My Chevelle has
the
> same rear tire size with a 3.42 gear (car sees lots of highway time) and
I'm
> seeing 2950rpm @65mph with a Holeshot 2400 converter behind the 406. I
figure a
> 4.10 gear in my car would come in around 35-3600rpm which is what the
other list
> members are seeing with their cars. I can't vouch for the absolute
accuracy of
> my tach (Auto Meter Sport Comp 5" Monster), but it is relatively new and
my
> speedo was calibrated by the trans shop when they installed the TH400 two
years
> ago. I don't think I'm getting any extra slippage with that converter at
that
> rpm because the cruise rpm was the same with my old TH350 trans and
> off-road/heavy duty converter (tighter than stock). Anyway, I was just
curious.
>
> Cliff Klimas Hamilton, NJ
> '71 406 Chevelle (500+hp 427 SBC coming next month!)
> '88 CSC (slow as s**t but looks/sounds good)
>
>
> > I run about 2800 RPM at 65 and about 3000 at 70. I have a 2500 stall
behind
> > a 500 HP 454. I am running 275 60 15 rear tires. Believe it or not I
> > actually get fairley good gas mileage on the highway about 14-15 mpg.
Also
> > keep in mind that it is a true 4.10 gear with tires that are 26 inches
tall
>
>
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