3.27 vs 3.73 vs 4.10 (Took A Couple Hrs 2 Complete... Enjoy)

99RioGT · May 13th, 2010, 09:22 AM

Originally Posted by Eagle2000GT

I don't know. CliffyK is a tech guru and he uses .62:1 for his 2003 Mustang GT's T3650 (reference the Paladinmicro link above). I've also compared rpms with guys who have T-3650s and 4.10s. The results were what I wrote. Maybe someone else can shed some light on this.

It should be easy to test out. We'd need someone with an 02-04 GT with 3.73's to see what rpm's they're seeing at 75 - if it's 2530 rpm like you found or something a bit lower.

therat1989 · May 13th, 2010, 10:04 AM

I am beginning to think I have a T-45. Which makes me somewhat happy. After my 3.73 install according to that calculator 5000rpm is equal to 148mph. Now 148 mph before 3.73's= around 4400. According to my dyno 4400rpm= 251whp and at 5000rpm I will be making my peak horsepower of 268whp. I wonder if the extra bit of power will actually increase my top speed slightly and finally make it to where I can bury my speedometer. (on a closed course)

M.P. Cobra Fan · May 13th, 2010, 10:15 AM

Thread is being copied to the stickied 99-04 info thread.

therat1989 · May 13th, 2010, 10:25 AM

Originally Posted by M.P. Cobra Fan

Thread is being copied to the stickied 99-04 info thread.

Awesome. Also that calculator has provided me with some great information. I have detailed out all the gains my car receives from doing a roll on race between stock 3.27's and 3.73s. The average power difference in 3rd and 4th gear roll from 60-100 is about 25whp. I can see now why gears will help so much. I cannot wait for the install. Also the calculator has helped me figure out my optimal shift point when comparing to my dyno.

F8L GT · May 13th, 2010, 10:44 AM

Originally Posted by M.P. Cobra Fan

Thread is being copied to the stickied 99-04 info thread.

yeah that would be good. It was always in the modular section but never in the 99-04

1_nice_03_gt · September 11th, 2010, 03:22 PM

sweet 4.10's do kill ur mph it seems, but can u also write a 1/4 rating to see if it does change

tbirdscwd · September 11th, 2010, 04:09 PM

edit: I guess cliffyk's calc was already posted above LOL

maxgst · September 11th, 2010, 05:00 PM

that says that 5th can go all the way up to 216 mph?? but whats the real top speed that can be archived by these cars?

0949er · September 11th, 2010, 05:41 PM

im sure those above readings neglect air resistance, friction, etc.

Just wana add that w/ 4.10s I was pushing 115 MPH @ 6200 RPM at the track

khern1 · September 24th, 2010, 02:12 AM

Nice write up bro

Eagle2000GT · September 24th, 2010, 07:33 AM

Originally Posted by therat1989

I am beginning to think I have a T-45. Which makes me somewhat happy. After my 3.73 install according to that calculator 5000rpm is equal to 148mph. Now 148 mph before 3.73's= around 4400. According to my dyno 4400rpm= 251whp and at 5000rpm I will be making my peak horsepower of 268whp. I wonder if the extra bit of power will actually increase my top speed slightly and finally make it to where I can bury my speedometer. (on a closed course)

You might still have a T-3650. One of the Tremec sites I've been to said that they didn't change the fifth gear ratio in the T-3650 to .62:1 until October 2001.

Eagle2000GT · September 24th, 2010, 07:55 AM

Originally Posted by maxgst

that says that 5th can go all the way up to 216 mph?? but whats the real top speed that can be archived by these cars?

This one doesn't. This has been posted before in this thread but its worth posting again.

PaladinMicro

You can only go as fast as your horsepower allows. In the calculator it takes 188 hp to go 145 mph. For a T-3650 thats around 4000 rpms in fifth. It doesn't matter if you dyno 250 hp at 5000 rpms, wind and friction will stop you from going faster than 145 mph unless you have more than 188 hp at 4000 rpms.

You need to know your power curve in order to determine top speed. At the top of the page Cliffyk has posted a link to his dyno sheet for reference.

Bullitt5566 · September 24th, 2010, 08:15 AM

An alternate location for gear info.

Gear Tables

Everett · October 19th, 2010, 12:26 AM

nice work....what kind of mileage with the 323s

Wayfarers All · November 30th, 2010, 05:29 PM

Here is a graph with adjustable values to figure out your gears, trans, and tire sizes...

PaladinMicro

ojb226 · January 28th, 2011, 12:31 PM

thanks dude that is just what i needed

WickedSnake00 · January 28th, 2011, 01:23 PM

This should definitely be an excel spreadsheet. That would also let you graph shift points, as well as torque curves.

Plus auto's could be done but you'd have to figure the slip coefficient, and when the TC goes into lockup. Or you could just do top gear when lockup is engaged.

Just a thought. I do this stuff for work. I could probably help.

DSG2vGT · May 15th, 2012, 01:20 AM

awesome, awesome thread....

May 13th, 2010, 10:04 AM	#62
therat1989 Enthusiast Join Date: Dec 2008 Posts: 706 iTrader: 0 reviews	I am beginning to think I have a T-45. Which makes me somewhat happy. After my 3.73 install according to that calculator 5000rpm is equal to 148mph. Now 148 mph before 3.73's= around 4400. According to my dyno 4400rpm= 251whp and at 5000rpm I will be making my peak horsepower of 268whp. I wonder if the extra bit of power will actually increase my top speed slightly and finally make it to where I can bury my speedometer. (on a closed course) __________________ 1/8mile 8.71@80mph on street tires.

May 13th, 2010, 10:15 AM	#63
M.P. Cobra Fan It's in the details Mod! 01 Cobra Vert Nov 09/10 ROTM! Join Date: Mar 2009 Location: Ft Stewart/Naples/Hampton/Tampa Posts: 11,013 iTrader: 1 reviews	Thread is being copied to the stickied 99-04 info thread. __________________ Pinup in signature by loish.net Modded Mustangs Cobra Club#007 Military Crew E5 VOTED MM's BEST SIGNATURE 2010. THANKS STANGGTR07

September 11th, 2010, 04:09 PM	#67
tbirdscwd MM Fanatic 2004 Mustang GT 12.88 @ 109.45 N/A Join Date: Feb 2010 Location: Davis, CA Posts: 3,417 iTrader: -1 reviews	edit: I guess cliffyk's calc was already posted above LOL __________________ Fun: 2004 Mustang GT DD: 1994 Ram 2500 Cummins 4x4 Borla "Stinger" Exhaust Vids

September 11th, 2010, 05:00 PM	#68
maxgst Hardcore Enthusiast 2000 Mustang GT Join Date: Jun 2010 Location: Miami, Fl Posts: 2,392 iTrader: 1 reviews	that says that 5th can go all the way up to 216 mph?? but whats the real top speed that can be archived by these cars? __________________ .............................2000 GT Vert............................. How To Cut/Remove springs

September 11th, 2010, 05:41 PM	#69
0949er MM Fanatic 2004 Mustang GT 12.85 @ 114 Join Date: Apr 2010 Location: Charlotte Posts: 3,224 iTrader: 0 reviews	im sure those above readings neglect air resistance, friction, etc. Just wana add that w/ 4.10s I was pushing 115 MPH @ 6200 RPM at the track __________________ MODS: Vortech V1 T-Trim @ 7.5 PSI (tuned down) Comp Cam Stage 2's + more 432 rwhp / 396 rwtq 02/27/2011 NEW VIDEOS! It takes ~$60 a rwhp (over stock) for a 99-04 Mustang GT. Do the Math C2H5OH on the horizon

September 11th, 2010, 03:22 PM	#66
1_nice_03_gt Hardcore Enthusiast 2003 ford mustang gt 13.9 stock Join Date: Sep 2010 Location: bay area Posts: 1,473 iTrader: 1 reviews	sweet 4.10's do kill ur mph it seems, but can u also write a 1/4 rating to see if it does change

September 24th, 2010, 02:12 AM	#70
khern1 Regular 1988 ford mustang GT 5.0 Join Date: Aug 2010 Location: east stroudsburg,pa Posts: 78 iTrader: 0 reviews	Nice write up bro __________________ [SIGPIC][/SIGPIC]

September 24th, 2010, 08:15 AM	#73
Bullitt5566 Regular 2001 Mustang Bullitt 5566 Join Date: May 2009 Location: South Carolina Posts: 347 iTrader: 1 reviews	An alternate location for gear info. Gear Tables __________________ True Blue Bullitt 517hp 456tq Vortech \| Aftercooler \| MHS Blower Cams \| MAC LT \| Lethal Xpipe \| SLP PowerFlo \| MM RCA TQA PHB FLSC

October 19th, 2010, 12:26 AM	#74
Everett Hardcore Enthusiast 2000 gt Join Date: Oct 2010 Location: Saskatoon Posts: 1,053 Blog Entries: 1 iTrader: 2 reviews	nice work....what kind of mileage with the 323s

November 30th, 2010, 05:29 PM	#75
Wayfarers All Newbie 1998 Mustang GT Join Date: May 2010 Location: Asheville, NC Posts: 16 iTrader: 0 reviews	Here is a graph with adjustable values to figure out your gears, trans, and tire sizes... PaladinMicro

January 28th, 2011, 12:31 PM	#76
ojb226 Newbie 2000 Mustang GT n/a Join Date: Jan 2011 Location: Roanoke Posts: 30 iTrader: 0 reviews	thanks dude that is just what i needed

January 28th, 2011, 01:23 PM	#77
WickedSnake00 MM's king of Neon's 404 - car not found 17.81@87 Join Date: Aug 2010 Location: Diesel Engine Capital of the World, Columbus, IN Posts: 7,374 iTrader: 0 reviews	This should definitely be an excel spreadsheet. That would also let you graph shift points, as well as torque curves. Plus auto's could be done but you'd have to figure the slip coefficient, and when the TC goes into lockup. Or you could just do top gear when lockup is engaged. Just a thought. I do this stuff for work. I could probably help. __________________ Official Secondhand Snake Build Thread Here Looks Like a Cobra, Sounds Like a Cobra, Tastes Like a Cobra, Not a Cobra. For Sale: P71 Interceptor motor

May 15th, 2012, 01:20 AM	#78
DSG2vGT Regular 1999 Mustang GT stock 14.00@101 Join Date: Nov 2011 Location: Washington Posts: 332 iTrader: 0 reviews	awesome, awesome thread.... __________________ Dark Satin Green 1999 GT \| K&N \| B&M Short Shifter \| H&R SS\| MM C/C Plates \| Flow Master 40s \| Mac O/R H \| \| 275/40/17 Front 315/35/17 Rear \| NT555's \| Visual stuff \| YES I HATE BBK WAITING TO BE INSTALLED K&N FIPK, Accufab TB/Plenum, FRPP 4.10

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