3.27 - 4.10 Gearing ???

[420nitro]

Originally posted by JBeryleC
Well if there is someone out there who can tell me exactly where my rpm's will be at 75mph in 5th gear... then I can atleast compare to what I'm running right now.

I'd like to know that info for 3.73 & 4.10 gears...

Is there a calculation I can use?
i.e. using the tire diameter, rpm's, speed, gear ratio.. ect ect

Yes...look at this sites Analyzer..
It's about 2800 rpms if your tires are 24 inches in height.

[explicitone]

Originally posted by 420nitro
Yes...look at this sites Analyzer..
It's about 2800 rpms if your tires are 24 inches in height.

the analyzer on this site i thought uses a t-5s gearing which has a .68 5th gear like the t-45 but the 3650 has a .62 so it would be lower and the gts come stock with a 25.7 in tire

[explicitone]

4.10s should be between 2400-2500 @ 75

[420nitro]

Originally posted by explicitone
the analyzer on this site i thought uses a t-5s gearing which has a .68 5th gear like the t-45 but the 3650 has a .62 so it would be lower and the gts come stock with a 25.7 in tire

Yes,very true my bad.
As goes for the tire though, what does he have on? Stock 275/45/17's ???

[explicitone]

Originally posted by 420nitro
Yes,very true my bad.
As goes for the tire though, what does he have on? Stock 275/45/17's ???

stock is 245/45/17 which is 25.7 the same as a 275/40/17

[420nitro]

ok

[JBeryleC]

Ok.. I forgot about the anlyzers...

And yes it's off a little because my tranny's 5th gear is different, as stated by explicit.

?? use a slightly different tire diameter to get the exact rpm's I run now... then just used that same tire diameter to get the rpm's I would be running with the different gears??

by the way, I run Goodyear 245/45 ZR17

And I cant find a anlyzer that made for this specifically.. the closest match is asking for HP.. blah blah
I'll go check out someother sites for a anlyzer thats exactly what we need to figure this one out

Thanks for the help peoples

[JBeryleC]

Ok... I found a more accurate calculater...
Results:
(on a completely stock setup, with 245/45R17 tires)
(only accurate for the final drive ratio of the TR-3650)

3.27 @ 75mph = 2507rpm
3.73 @ 75mph = 2859rpm
4.10 @ 75mph = 3143rpm
4.30 @ 75mph = 3296rpm

So.. about the highest I am willing to go is 3.73's

Maybe I'll just have to do that
Thanks for the info guys!!

[explicitone]

Originally posted by JBeryleC
Ok... I found a more accurate calculater...
Results:
(on a completely stock setup, with 245/45R17 tires)
(only accurate for the final drive ratio of the TR-3650)

3.27 @ 75mph = 2507rpm
3.73 @ 75mph = 2859rpm
4.10 @ 75mph = 3143rpm
4.30 @ 75mph = 3296rpm

So.. about the highest I am willing to go is 3.73's

Maybe I'll just have to do that
Thanks for the info guys!!

that is way off
I dont spin that high with 4.10s and I have a t-45 and .68 5th

my buddy has a 03 with the tr-3650 and 4.30s and he is lower then it says here with 4.10s hes at 3000 at 80 and im at 2800 at 80 with 4.10s

so that is not accurate at all

[JBeryleC]

Ah crap... you're right.. I messed that up big time!!

Here are the real numbers...

(on a completely stock setup, with 245/45R17 tires)
(only accurate for the final drive ratio of the TR-3650)

3.27 @ 75mph = 2004rpm
3.73 @ 75mph = 2286rpm
4.10 @ 75mph = 2512rpm
4.30 @ 75mph = 2635rpm

sorry about that... those number should be right on!
It's accurate for my gearing, I know that atleast.. lol

And if those numbers are right, then I wouldn't mind gearing to 3.73's

Remember, I dont drag, so I dont need any more than that

[explicitone]

Originally posted by JBeryleC
Ah crap... you're right.. I messed that up big time!!

Here are the real numbers...

(on a completely stock setup, with 245/45R17 tires)
(only accurate for the final drive ratio of the TR-3650)

3.27 @ 75mph = 2004rpm
3.73 @ 75mph = 2286rpm
4.10 @ 75mph = 3512rpm
4.30 @ 75mph = 3635rpm

sorry about that... those number should be right on!
It's accurate for my gearing, I know that atleast.. lol

And if those numbers are right, then I wouldn't mind gearing to 3.73's

Remember, I dont drag, so I dont need any more than that

its still off
for the 4.10s and 4.30s it would be more like
4.10s 2500
4.30s 2650

those cal. are not all that good

you have to go by real world numbers

like I said before in 5th gear a car with a 3650 is at almost the same rpm at 75 with 4.30s that i am with 4.10s

[JBeryleC]

Holy crap I cant believe I just did that!!!

those last two numbers are supposed to be in the 2k's not 3k's... I'm editing it now... sorry!!

See what happens when we try to reply to fast? lol

[explicitone]

Originally posted by explicitone
its still off
for the 4.10s and 4.30s it would be more like
4.10s 2500
4.30s 2650

those cal. are not all that good

you have to go by real world numbers

like I said before in 5th gear a car with a 3650 is at almost the same rpm at 75 with 4.30s that i am with 4.10s

its not about drag racing it about driving and I will tell you this and most that done this will agree
most guys that go with 3.73 change them in a short time time to 4.10s or higher

DONT FEAR THE GEAR

I dont want to sound like a jerk
but a few of us as told you the same thing and you dont want to listen and the guys telling you this know what they are talking about
if you want 3.73s thats cool its your car but I would never go with a 3.73 gear in my car its not worth it to me

last but not least
do you know with the price of cams and install is going to be about 1000$(for 15 hp) you dont have alot of stuff that are needed for the cams to make real power

plus is you should get valve springs to even if the cam specs say they are not needed cause it cost an extra 185 dollar for the springs but if one should break the how much do you think a motor will cost I can tell you now ford WILL NOT COVER BLOWN MOTOR if its cause you puts cams in it that caused it to know

you say you have done a lot of research on the mods you want but I dont think you have otherwise you would know this

[JBeryleC]

The only reason for the 3.73's IF I even gear it, is because I dont want such high rpm's on the freeway... and since I dont race, I have to find a happy medium, thats all

I tell ya what... if this car wasnt my primary get around.. I'd go straight to 4.30's!! I agree with all of you on the gearing totally.

Realize this... everyone (including you explicit) who says to go with 4.10's or 4.30's spends their weekends at the track
I dont, so there is always a but or if factor involved... lol
I'm not as extreem as some of you, infact I am happy with the stock gearing.. ha!

Yes I know the valve springs are a must. And yes I know the cost. But as far as installation... my bro and I will be doing the install. (He has done the cams on his mod, along with many other motors.. he works at Ford, in service) I've rebuilt a 302 and a 351.. so I have enough basic know how Hopefully!

Plus.. cams aren't that hard of an install, now that they're up top We'll do it in a weekend, hopefully!
but then again.. you might see me posting how to's on here when it comes time to do the install... lol

[explicitone]

Originally posted by JBeryleC
The only reason for the 3.73's IF I even gear it, is because I dont want such high rpm's on the freeway... and since I dont race, I have to find a happy medium, thats all

I tell ya what... if this car wasnt my primary get around.. I'd go straight to 4.30's!! I agree with all of you on the gearing totally.

Realize this... everyone (including you explicit) who says to go with 4.10's or 4.30's spends their weekends at the track
I dont, so there is always a but or if factor involved... lol
I'm not as extreem as some of you, infact I am happy with the stock gearing.. ha!

Yes I know the valve springs are a must. And yes I know the cost. But as far as installation... my bro and I will be doing the install. (He has done the cams on his mod, along with many other motors.. he works at Ford, in service) I've rebuilt a 302 and a 351.. so I have enough basic know how Hopefully!

Plus.. cams aren't that hard of an install, now that they're up top We'll do it in a weekend, hopefully!
but then again.. you might see me posting how to's on here when it comes time to do the install... lol

yes and no the cams are harder to time then the 5.0 and valve spring removal is a pain with the heads on the car
plus with most cams on the mod motor it needs to be tuned just idle

and if your bro know so much about mustangs why are you asking us for simple info and why did he tell you they have 265rwhp?

dont get me wrong its your car and you must do what you want and will make you happy I just know from exp. that alot people that listen to ads and magazines are not happy when done and spend 2xs they money on the same stuff
like gears the 3.73 was great for a 5.0 but they suck for 99+ mod motor even if i was not a drag racer I would still go with 4.10s just cause of the fun factor on the street. IMO

i had my 00GT for 6 months before putting in my 4.10 and I only went to the track with this car 1 time in that 6 months cause I had a 87lx that I raced so as you can see the 00 was my street car at the time and I would have been kicking myself if I went with 3.73s
but I sold the 5.0 to help fund the 00 cause of how its

yes I have a few hard core race parts on my car that poeple think are not streetable but I can have just as much fun on the street and I can take a road trip across the country if i wanted and it not be a problem

what i am and others are doing is just trying to help you from spending money on something most people would not like



tony

[blue00gt]

My car is my daily driver and hardly ever sees track time (T-45 in my car, so yours will turn lower rpms). I love the 4.10s. Why are you so afraid of turning a little higher rpms on the freeway? It won't affect your gas mileage by more than 1-2 mpg in my experience. I have driven over 1000 miles in a weekend with my 4.10s and it's not bad at all. You need to drive or at least ride in a mod motored car with gears. It's not like back in the day when everyone ran a 3-speed auto or a 4-speed manual and if you geared your car aggressively it was almost topped out in the 1/4 mile.

[explicitone]

Originally posted by blue00gt
My car is my daily driver and hardly ever sees track time (T-45 in my car, so yours will turn lower rpms). I love the 4.10s. Why are you so afraid of turning a little higher rpms on the freeway? It won't affect your gas mileage by more than 1-2 mpg in my experience. I have driven over 1000 miles in a weekend with my 4.10s and it's not bad at all. You need to drive or at least ride in a mod motored car with gears. It's not like back in the day when everyone ran a 3-speed auto or a 4-speed manual and if you geared your car aggressively it was almost topped out in the 1/4 mile.

agreed
and before it get said no it does wear on the car more
cause even though your at a higher rpm the motor is under less load

[xxxBlakexxx]

ok guys, once last dam time. Gears are going on on Friday on my car. I am planning on the FRPP 3.73's due to plans to add nitrous. Do you guys agree with this assesment, or should I just go with the 4.10's. I am hoping I can just trade them when I get to the shop as they have them in stock if I decide on the 4.10's. A couple of hundred more rpms with the 3.73 is nothing.

You know, Ive been thinking, how often will I be actually pushing the N02? Most of the time, it will be non-NO2.

Give me you most honest opionion.

[JBeryleC]

Well brothers mod was a t bird... auto.. so it's different.

And (dont laugh) but he didnt tell me 265rw... my mistake and blamed him.. lol

As far as gearing goes.. I'll hold off all together untill I can find someone to ride with who's already geared

Thanks

[420nitro]

Originally posted by xxxBlakexxx
ok guys, once last dam time. Gears are going on on Friday on my car. I am planning on the FRPP 3.73's due to plans to add nitrous. Do you guys agree with this assesment, or should I just go with the 4.10's. I am hoping I can just trade them when I get to the shop as they have them in stock if I decide on the 4.10's. A couple of hundred more rpms with the 3.73 is nothing.

You know, Ive been thinking, how often will I be actually pushing the N02? Most of the time, it will be non-NO2.

Give me you most honest opionion.

You want my honest opionion... run the 4.10's and don't look back! For someone starting to play with the N2o, you will most likely not go over a 150 shot. After a 150 shot the motor will start to need more of an agrasive tune for the spray and become more criticle. Not to say that it won't be criticle with less but alot less forgiving at that point, and the most you will pick up on, will be a 150 shot. Most people start off at a 50-75 shot and work they're way up. Usually at the 150 level people start to either back off (because they know better, or just worried about their tune.) After 150 shot the point of dimish is not quite there unless its cam and built for it.
So to wrap this up, run the 4.10's and use the nitrious when needed.
My.02's