Max Power said:An I the only guy that loves the sound of my engine at 3500rpms? If you get decent heads, a lumy cam and decent exhaust, it's music to my ears.
Max Power said:Am I the only guy that loves the sound of my engine at 3500rpms? If you get decent heads, a lumy cam and decent exhaust, it's music to my ears.
ultrastang said:If you are running a C-4, C-6 automatic, or Top-Loader 3- or 4-speed manual transmission (all 1:1 in high gear), then you are greatly limiting the capability your car has in both performance and economy.
The best choice is to run a lower gear ~3.25-3.70:1 in conjunction with an overdrive transmission, such as an AOD or T-5 manual 5-speed (typically .68:1 in overdrive).
The overdrive will allow you to take advantage of off-the-line acceleration with a lower rear end gear, but at cruising speeds, the engine RPMs will drop drastically once the transmisssion goes into overdrive.
As an example, if you had a 26" tall tire, 3.00:1 rear end ratio, and non-overdriven transmission, your engine RPMs at 60 MPH would be ~2,326 RPMs. Given this very same senario, except coupled to an overdrive transmission, your cruising RPMs at 60 MPH would be 1,582 RPMs --744 RPM drop.
A T-5, in overdrive, coupled to a 3.50:1 rear end ratio would cause the engine to "see" the rear end ratio as being 2.38:1 (3.50 x .68 = 2.38:1). Even though the rear ratio may be 3.50:1, in overdrive, the engine thinks the rear ratio is 2.38:1 --That's even higher than a stock 3.00:1 ratio with no overdrive, so you would actually get better mileage with the 3.50s over the 3.00:1s, and still have much more accelleration in 1st - 4th gears with a T-5, or 1st - 3rd with an AOD.
http://www.ultrastang.com/Rearinfo.asp?Page_ID=3
Max Power said:All diffs are third members. There are diffs with integral carriers, and diffs with removable carriers. It takes special tools and a knowledge of how to set gear patterns. It's not for a novice.
What gears do you have now? I am willing to bet that they are real close to 3:00 to 1.
bad68coupe said:I have changed out gears before on the kind of rear end where there is an inspection plate, but not like the one on my 68. i didn't think it was that difficult, a little time consuming but not to hard. so how hard is it to change my stangs compared to the other style?
I am not sure what gears i have right now, it is a stock 68 rear end. i will check the tag later and post it.
doug68hoss said:just get another third member with gears close to what you want...
bad68coupe said:thats too expensive
Max Power said:No it isn't.
You can swap in a non-posi 3.00 chunk for probably about $50.
Nobody wants em.
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