o no i completely understand. its just the people who dont really want to learn and are into it cause its the cool thing to do. then if the fad drops then they are out like flies. i help the people who truly love the sport/hobby like i and most others do on this site.

 

Yea some guy came to my school from car quest askin what year my skyline was..

some guy workin at autozone told me he had 3 transmissions in his cutlass

 

wow pretty impressive

 

Its just sad how many people fail to realize this.

I love it when kids are like "Man when my car hits OD its like a rocket" LOL.

 

Just like that one night we can from the causeway at the gas station at the end of the bridge and we was right behind "Nismo" with the Cedric and clearly heard some faggot ass rican kid tell his dad "Dad look at that skyline" pointing at his car i could have tell he was either 17 or 16 as i sake my head while lauging on how much of a dumbass could he had really been!

 

yea two in the trunk he stole from auto zone.. he was not bragging he was "fencing"

 

4th is "near" 1:1 I'd have to look it up again but .947:1 comes to mind, close enough where it does not matter much. and to clear up confusion, typically numerically higher gears are a lower total. remember the : can also be documented as number of teeth. eg. 13/21 or 1:1.62 aka .619:1 they are all the same ratio but are all greater then 1:1 just how it's documented. treat the : as a division sign (putting the 2nd number on top) and it might make more sense to you. since when you divide1 by a number <1 you get an output >1..

however when you factor in the final drive ratio. (I'll use your vette example) 3.42:1 is where the overdrive ceases to be. since even at (6000 RPM / .570:1 (6th) = 10526RPM) then through the final drive which is 3.42:1 (10526rpm / 3.42= 3078 RPM. 3078/6000 1.949:1 engine to wheel ratio in 6th on a Vette, still numerically higher then 1:1 or a lower gear ratio then 1:1.

so really it's irrelevant what the transmission ratio is since the dyno has no idea, it does know wheel speed and it knows RPM (if your using a pickup) I don't know where the 1:1 dyno statement comes from? Most Tuners just try and find the gear that gives them the highest peak numbers on their given dyno. (since most dyno customers just want bragging rights anyway)

That's why I put little to no value in dyno numbers in compairing cars to one nother. as a tuning tool, sure! but proper power delivery is way more complicated then XXX max wheel horsepower. Using the Spec V vs. the Honda Civic Si for example. If you followed the dyno graphs the SI should distroy the Spec-V it's got 11% more peak power Also 6 speed, and LSD and is a bit lighter. but it Never does... Nissan put way more time into getting the Ratios correct to use 100% of availble torque and keeping that car in the meat of the torque curve is what makes it so dangerous on track. regardless if it's suspension was taken of an 18th century ox cart.

 

After building transmissions for a while, there will always be an overdrive regardless of what the final drive is. If you went stupid and put in a 6.11:1 final drive, would that make 2nd gear an overdrive? No. A transmission has what a transmission has regardless of your final drive in the world I was used to dealing with. All of a sudden, a 4L60E wouldn't "lose" an overdriven planitary because of a gear swap, it still maintains the ratio internally as the transmission doesn't care about anything past the output shaft. It is still in reducing or multiplying the power/rpms transmitted from the input shaft to the output shaft.

Even though you don't say that there is a numerical overdrive, there still is when you look at the sheer ratios.

 

I had a kid at a party argue cars with me, then proceeded to tell me I was stupid and probley thought a rb26det was a 2.6 liter and all this other crap that didn't make any sense.

 

your correct, in all except your final drive statement, a 6.11:1 would actually lower all the effective gear ratios. since it's stated as Input:output and is a lower gear ratio then for example a 3.73:1 .

oh and Some older transmissions 2-3 speed auto's and manuals had no overdrive but we are talking about 1960's (early 70's at latest) tech and it's irrevelant to anything we are going to deal with today. those cars used "highway" final drive ratios some in the 2:1 range to allow them to acheive even a modicum of speed on the open road.

but in those days you would order the car based on your usage, but those were the days you actually could order a car, not just pick one off the lot.

Keep in mind I'm keeping this simple since Tire diameter acts as an effictive 3rd ratio. but this can not be computed unless your comparing it against a known quantity. or two varying outside diameters. I think it's silly that for marketing the car companies do not invert the ratios > 1:1 since then numerically higher gear would be higher in effect. (I think less confusing) I know it's early, but lots of people make this mistake, and say (I'm gonna put some higher 4:11 gears over my 3.73 gears) but it's a lower gear ratio.. (but I guess anyone getting this detailed 'should' know the diffrence)

I'm not busting your chops, It's early in the morning, but it's one of my pet peeves. That's why I leave final drive out when referring to "overdrive" vs. "Under drive". because your right.. even with the "stupid" 6.11:1 gears if the 6th gear ratio is higher then 1:1 (numerically lower) it's still an overdrive gear. despite it running out of revs at 50 MPH

I don't usually consider semantics, but inverting ratios, and People referring to shock Damping as "Dampining" are a couple things that grind my gears (pun intended) I can tell that YOU understand, but if we consistently refer to things in the proper vernacular it will help those less fortunate then yourself to understand, or at least I can pray.