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Old 03-29-2009, 07:29 PM
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sorry been busy I would like to have a car that's not looking for another gear on the highway as that is were it spends most of its time about 65 miles a day to work and back. it has true duals with no cats headers will follow shortly. I would like to get in the range of 17-19 mpg on the highway. Now to get a few more HP which brings me to the L-31 heads but along with the raise in compression comes a different cam and there goes the 17-19 mpg. So the question now is what to do.

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Old 03-29-2009, 08:18 PM
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cam-what to do

first of all you must decide what you want gpm or power? i'v replied to so many emails it's hard to keep up with who is running what! i need to know which car i'm talking about and the perticulars of your car, engine, tranny, gears, tire size etc, etc, if you want just email me at with your spec's and i'll try and help you as much as i can, thanks BUTCH
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Old 03-29-2009, 08:26 PM
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Originally Posted by ap72
Ok, I think I see what your looking at, some people refer to numerically lower gears as taller and higher gears as shorter. (God knows why )

a bigger cam requires a numerically larger, taller, steeper, or whatever else you may wish to call it gear.
Why? Because that's the way it has been for 100 years. A 2.80 is a tall gear. A 4.56 is a short gear.
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Old 03-29-2009, 09:33 PM
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i think there has been a mistake made here? i'm not the one that said anything about tall or short gears, that was someother guy that repleid to something that had nothing to do with what i said, so your responding to something i didn't even say. i know gear ratios and can only tell you from my experince and others who i know, as to what helped them. like who would of thought that a 69 mustang would have a lug bolt pattern of 4.25 and not a 4.5 and it's a 9" rearend where my 66 stang is an 8" with the 4.5, but its true and whats even stranger is it has a set of origenal "GT" rims on it, so my point is when it comes to cars anthing can happen, and everyone has a diff way of doing things. example: what would happen if you would put a realy short low profile tire on? that would change your rpm range as say a taller tire which would slow things down a bit, thats why it's important to decide what you want. i don't remember comenting on your gears and thats why i left you my email address, so we can talk without interferance from someone else putting the 2 cents in, so if you want me to help then i need to know what you are talking about, sorry for the confusion, butch
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