3.73 gears
 

If I was to get my Stang dyno tested with the stock gears , would I see a difference with a dyno test with 3.73 gears? It would be with the same mods for both gears. Im new at this stuff so any help would be great. <img border="0" src= smileys/smiley1.gif> How much does a dyno test usually run?



-KO-

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it should be different, but not by that much. dynos arn't cheap, so i would wait till you had a bunch mods on there to check it. your probably @ 225-230 rwhp with what you have

3.73 gears
 

can you give a general $ amount for the typical dyno, just curious myself

3.73 gears
 

A gear change should show a difference on the dyno. Gears dont add horsepower.

3.73 gears
 

I meant to say it SHOULDNT show a difference.

3.73 gears
 

Knight I dont know where youre from but, alot of the shops around here run dyno specials on saturday mornings. The first 10 cars to show up get 3 pulls for like $50. Ask some of your local shops.

3.73 gears
 

where is "around here" if you don't mind my asking, anywhere near southeastern michigan

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I live in Vegas. I know they dont add HP, but heard it feels like it does. LoL!!!



-KO-

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I live in central NJ but I wish I lived in Vegas!!! Knight you bastard!!!!

3.73 gears
 

<blockquote>Quote: Originally posted by lloydchristmas on 10 March 2003<hr>
I live in central NJ but I wish I lived in Vegas!!! Knight you bastard!!!!

<hr></blockquote>



LoL!!!

If your ever out this way, let me know.



I just ordered my 3.73 gears today. I read somewhere that a speedo gear will need to be changed? What tooth count and where can I pick one up?



-KO-

3.73 gears
 

OK gents i just went out with my bro tonight in his GT to G-tech it to test rear wheel HP and you do get more rear wheel HP with a lower gear.Engine HP doesnt change dont get me wrong but rear wheel does as long as ya can hook the tires with the lower gear.I dont know if ya all are familar with a g-tech but they are very accurate.

3.73 gears
 

Please explain how you get more rear wheel horsepower without getting more flywheel horsepower. It doesnt make sense. In fact its impossible as RWHP is FHP- the drag of the trans and rearend.

3.73 gears
 

u loose approximatle 15% of your fwhp by the time it gets to the rear wheels.... just to let ya know...and what lloyd said it's impossible..

3.73 gears
 

well ok,

ill try to explain.ur not making more engine HP. ur just freeing up HP to the rear wheels is all. think of it like this .when ur riding a 12 speed bike and ur taking off in 12 gear or trying to climb a hill in 12.then u put it in first gear. Fellas i just tell what the G-tech says and its very accurate they have ran tests and tests with it.

3.73 gears
 

C'mon

3.73 gears
 

Thank you Noslow.

3.73 gears
 

It's true fellas, contrary to popular belief, gears DO add HP. Actually, they add torque, but HP=TQ*RPM/5252, so in essence, they do add HP. Cougar actually had a very good analogy. Try putting your car in 5th and take off at a light. Hard to do without stalling it, isn't it? Put it in 1st and see what happens. You're putting more torque down. Look at it this way. With 2.73's in your car, you pretty much have to start in first to get a good launch at the track. If you start in 2nd, the car will most likely bog down, right? Ok, with 3.73's, if you start in 1st on street tires, all your gonna do is spin. 1st gear with 3.73's is pretty much useless. however, 2nd will get you a launch as if you were to launch in 1st with 2.73's. Why? Because your putting more torque to the wheels. And as said before, HP is directly related to TQ.



Class is in session all this week . . .j/k

3.73 gears
 

You guys are killing me with this nonsense. I hate to braek it to you but gears do not add horsepower, and its impossible to increase RWHP without increasing FHP. Common sense 101

3.73 gears
 

g tech pro is a pile... so inacurate... this is the same pile that said my bros car ran a 14.8 when we went to the track it ran a 15.3.... yea real good.. pos

3.73 gears
 

ok, we have a performance shop in town with a dyno.I asked him because i wanted to be sure and guess wot&gt;&gt;u can increase RWHP without touching the engine. here is some things u can do to increase rear wheel HP&gt; GEARS, CONVERTER, TRANNY, just to name a few so there ya go. Know tell me that the dyno is wrong to. like i said before ya not gaining engine HP ur just FREEing up RWHP.

example #1 3200 pound car with 308 gear take about375 RWHP to run 12s same car same engine only takes 300 RWHP with 3.73 gear,WHY, besauce ur freeing up RWHP.Same thing with tranny ,it takes more power to turn an AOD trans than say a C-4 there for ur gona gain RWHP with a C-4. It dont take a smart guy to figure out it takes more RWHP to turn a 3.08 gear than it takes to turn say 4.11 gear. but maybe thats why my car runs 11s and 10s on the nos because i dont know what im talkin about RITE LOL LOL LOL

3.73 gears
 

Ok, gears don't add hp, so I guess the faster acceleration you get with gears is just in your head? You're saying that 2.73's and 3.73's have the same acceleration? So what's the point of buying aftermarket gears? Truth is, gears do add hp, it's just kinda hard to believe cause you're not touching the engine. That's why putting 3.73's in a stock mustang will beat another stock mustang with 2.73's. How else could you beat another car unless you're putting more power to the ground (assuming drivers are equal)? This debate can go on forever, but if you can prove to me how putting gears in your car makes it go faster without adding power to the wheels, I'll admit my mistake and stop talking.

3.73 gears
 

Gears just make you get up into your RPM range quicker. Thats why you pick up bottom end but lose top speed. Take your G tech and throw it in the river. LOL

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Tell the shop who told you that to sell his dyno and close his doors.Because he is wrong just like you are

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LOL i luv it when a guy thinks he is rite and some one prooves him wrong.Ill bet lloyd dont even have a clue wot rwhp is.

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As soon as someone proves me wrong you can make a statement like that. Horsepower is made in the engine. For guys like cougar who dont seem to get it, the engine is the BIG AIR PUMP IN THE FRONT OF THE CAR. Modifications made to this air pump, the ENGINE, will usually result in an increase in power. The more air you can push through the engine the more power you can make. Stay with me here, this is where it gets tricky. The horsepower rating at the fly wheel will always be greater than that at the REAR WHEELS. (RWHP) That statement right there proves Cougar wrong, and youre right It is cool. The power at the rear wheels is less because of the amount of pwer use to turn the trans, driveshaft, gears and so forth. The last time I checked, changing gears or converter or what ever else, did not add air or fuel to the ENGINE thereby NOT INCREASING HORSEPOWER. Now that I have explained it to you go watch the Fast and the Furious again because that is the kind of dime store racer you have proven yourself to be. If you want to hang with the big boys you should get your sh!t straight before you talk smack. The chance of you EVER knowing more about how a car works than Myself or Noslow or anyone else who was on the right side of this argument is slim if not non existent.

Mayber instead of being Lloyd I should be called Lord.

3.73 gears
 

No see thats where ur wrong dude. what happens when u put roller rockers on a engine or take a power steering belt off? ur not adding air or compression,ur just freeing up frictoin. With translates to more HP.rear wheel can be done just like that.when you use a lower gear ur getting rid of friction.Same as when u go from a AOD trans to a C-4. The C-4 uses less friction to turn so wot happens ? the RWHP and Torq go up&gt;&gt;&gt;.........

3.73 gears
 

Oh and i never said it increases HP at the engine infact i said it dont increase engine HP just RWHP.

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Wow I guess you are right. I apologize dude. I put a short shifter on my car today and picked up 5 horsepower!!! With out adding fuel or air to my motor!!!! You are a genius

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If you think all roller rockers do is reduce friction maybe you should find a new hobby after listening to you I dont think the whole car thing is your cup of tea.

3.73 gears
 

RR's do add hp though, don't they? They increase valve lift and improve efficiency, or am I wrong? Either way, I still think gears add hp, lol.

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91GT- See you are a sensible guy with some kowledge and I can talk to you on a human level. Yes RR's add horsepower, they increase valve lift and allow MORE a/f mix to enter the combustion chamber.

Oh yeah I almost forgot. Gears dont add HP LOL.

3.73 gears
 

They DO however bring you into your powermaking RPM band quicker. THAT is what gears do.

3.73 gears
 

Ok, I believe you, but I don't believe you. I'm gonna have to see dyno runs comparing two different gear ratio's to see if they do or don't myself. Until then, this debate is over on my end.

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Fair enough dude. Lets end this whole stupid thread

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Sorry for starting it. LoL!!!



-KO-

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LOL well, it IS a discussion forum. Sometimes they get out of hand though. Its all in good fun anyway. Hope everyone is still cool.

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Ya, my question got answered somewhat. LoL!!!

One more about the gears. Will the 3.73 change my gas mileage alot?



-KO-

3.73 gears
 

It will if your coming from stock gears. The best way to minimize fuel consumption is to shift at 2500 or below, and I'm not sure what cruising RPM's with 3.73's are on the freeway, but try to keep it around 2000-2500.

3.73 gears
 

You might notice achange in mileage but not to the point where its not worth doing. I had 4:10's in my last stang and the gas mileage was horrible but I was having sooo much fun It didnt matter. Put the 73's in and you'll see why its easy for people to think that gears give you HP. Its one of the most noticeable changes you can make to a car!!!!

3.73 gears
 

Follow the advice of 91GT hes exactly right.