3.55 vs 3.73 S.C. GT

Shaun03GT · February 20th, 2010, 02:52 AM

So I took my dads car out for a spin, 03 Mach exhaust intake and the stock 3.55's.

The car feels so sick in 3rd gear. I fuckin love how hard it pulls, and its a nice long pull.

So for track purposes, would 3.55's hurt me? Hitting 4th alittle before the traps? Or will I still be good? Im not sure how long the gears are with 3.73's, but just on his Mach with 3.55's making 290rwhp and 314rwtq feels amazing. Never mind around 360/360.

GTermi · February 20th, 2010, 02:53 AM

3.73s if ur going for the track, 3.55s are more of a highway gear

GTermi · February 20th, 2010, 02:54 AM

youll be fine at the track, i have no problems with my 4.10s

Scott2001GT · February 20th, 2010, 02:55 AM

min 3:73's

/thread

Shaun03GT · February 20th, 2010, 03:00 AM

I might be doing highway shit too. How are u going through the traps with 4.10's? Taller tire?

I can get 3.73's for $100 brand new from someone. Which saves me $50, but I wanan be happy with my gear selection.

I8ACMRO · February 20th, 2010, 03:01 AM

Originally Posted by Shaun03GT

I might be doing highway shit too. How are u going through the traps with 4.10's? Taller tire?

I can get 3.73's for $100 brand new from someone. Which saves me $50, but I wanan be happy with my gear selection.

You will be disappointed if you DON'T get 3.73's

Scott2001GT · February 20th, 2010, 03:03 AM

IMO 4:10s would be good for 450rwhp below(depending on application) But yea you need a 28in tall for the track but street your fine. Depends what your looking for. There are S197 guys with KB's and TVS with 4:10s and love it.

Shaun03GT · February 20th, 2010, 03:03 AM

Yea fuck it ill go 3.73's...they pull long as shit too. I looked up the gearing for them. Okay I agree with scott...

/thread

Shaun03GT · February 20th, 2010, 03:05 AM

Originally Posted by Scott2001GT

IMO 4:10s would be good for 450rwhp below(depending on application) But yea you need a 28in tall for the track but street your fine. Depends what your looking for. There are S197 guys with KB's and TVS with 4:10s and love it.

Yea true. Accually theres a guy on Youtube, he has like 514rwhp and running 4.10's. All street, I think, he has 28" tires...maybe 26" not sure.

I wonder what Ill be trapping at, at the track. I should be making Cobra numbers stock at the very least. They weigh more because of the IRS, and they suck at launching because of the IRS...not suck, but not as good as SRA.

I think they trap at 114mph stock right? So around that area Id think?

Scott2001GT · February 20th, 2010, 03:07 AM

they are heavier motors too, trans, and irs yeah.

Depends you want a highway monster or track monster?

Shaun03GT · February 20th, 2010, 03:09 AM

Lol both. Which is possible to do. Ill do more track then highway. Occasional highway shit, but most id go in a race is like 120...maybe alittle more if it was neck and neck.

But Im not into building a full out track car. I wanna make it really good in the twisties too.

Scott2001GT · February 20th, 2010, 03:11 AM

4:10s IMO then.

highway I would say 3:73s since your top speed will be higher.

but you have a centri, so remember RPM builds boost.

Shaun03GT · February 20th, 2010, 03:13 AM

I know i know, I cant do 4.10's...I accually dont want to. The one thing I hate about 4.10's is not really feeling any gear pull that long. It wraps up so quick.

Ill just go 3.73's for sure. And have a built rear end too

Scott2001GT · February 20th, 2010, 03:16 AM

so you know you want 3:73s why start a thread lol

Shaun03GT · February 20th, 2010, 03:20 AM

I was up in the air about the 3.55s too. Cause they feel sick....but I wanted to hear some other peoples opinions

Scott2001GT · February 20th, 2010, 03:22 AM

don't do 3:55's.

GTRACER88 · February 20th, 2010, 04:38 AM

For a supercharger you don't want long gears. Superchargers USE rpms to make power. The faster your engine spins the faster it makes power to the ground. Simple concept. I know this guy who was running 700 rwhp with 4:10 gears and he says he would be dissapointed if he had 3:73. If I were supercharging my car I would keep the 4:10's in.

Smoothgrandmama · February 20th, 2010, 06:22 AM

I have run 3.27's 3.31's 3.55's and 3.73's I have run 220, 240, 260 and 440 rwhp. For a 12-13 sec car I suggest 4.10s. For an 10-11 sec car I suggest 3.73's. I would not run 4.10s on the streets in houston with over 400 hp.

GTRACER88 · February 20th, 2010, 11:32 AM

Personal opinion. Everyone is entitled to one. A buddy of mine has a 680 rwhp cobra has a kenne bell on it, and he has 4:10s and will not change them.

JayC · February 20th, 2010, 12:10 PM

So much fear for the gear

Most people under-gear for silly reasons. That just give us the advantage with our 4.10's

February 20th, 2010, 02:52 AM	#1
Shaun03GT I Post Entirely Way Too Much 2003 Mustang GT 1/8 - 8.09 @ 91.39mph 1/4 - 12.35 @ 114.52mph Join Date: Sep 2009 Location: Weymouth, MA Posts: 12,063 iTrader: 11 reviews	3.55 vs 3.73 S.C. GT So I took my dads car out for a spin, 03 Mach exhaust intake and the stock 3.55's. The car feels so sick in 3rd gear. I fuckin love how hard it pulls, and its a nice long pull. So for track purposes, would 3.55's hurt me? Hitting 4th alittle before the traps? Or will I still be good? Im not sure how long the gears are with 3.73's, but just on his Mach with 3.55's making 290rwhp and 314rwtq feels amazing. Never mind around 360/360. __________________ 2003 Mustang GT Vortech V1 Intercooled SAE Corrected - 380rwhp & 380rwtq @ 9psi Uncorrected - 401rwhp & 400rwtq @ 9psi Tuned By: Pete @ Performance Dyno Affordable Supercharger Build Guide Supercharger Info for Noobs

February 20th, 2010, 02:53 AM	#2
GTermi Enthusiast 2004 Mustang GT Join Date: Mar 2009 Location: Fort Worth Posts: 640 iTrader: 0 reviews	3.73s if ur going for the track, 3.55s are more of a highway gear __________________ My Car- 2004 Mustang GT Her Car- 2011 V6 Auto Premium Saving up for either a 2009 Shelby GT500 or a 2011 5.0...Can't decide!

February 20th, 2010, 02:54 AM	#3
GTermi Enthusiast 2004 Mustang GT Join Date: Mar 2009 Location: Fort Worth Posts: 640 iTrader: 0 reviews	youll be fine at the track, i have no problems with my 4.10s __________________ My Car- 2004 Mustang GT Her Car- 2011 V6 Auto Premium Saving up for either a 2009 Shelby GT500 or a 2011 5.0...Can't decide!

February 20th, 2010, 02:55 AM	#4
Scott2001GT BYAHHHH! 2001 Mustang GT 13.874 Join Date: Mar 2008 Location: Missouri Posts: 14,628 Blog Entries: 1 iTrader: 3 reviews	min 3:73's /thread __________________ Precision Turbo\|TurboSmart\|TeamZ\|Strange\|Hellion\|BBK\|SCT\|Edge Converters\|Fairbanks\|CG Fabrications\|Treadstone 4V swap in the works

February 20th, 2010, 03:00 AM	#5
Shaun03GT I Post Entirely Way Too Much 2003 Mustang GT 1/8 - 8.09 @ 91.39mph 1/4 - 12.35 @ 114.52mph Join Date: Sep 2009 Location: Weymouth, MA Posts: 12,063 iTrader: 11 reviews	I might be doing highway shit too. How are u going through the traps with 4.10's? Taller tire? I can get 3.73's for $100 brand new from someone. Which saves me $50, but I wanan be happy with my gear selection. __________________ 2003 Mustang GT Vortech V1 Intercooled SAE Corrected - 380rwhp & 380rwtq @ 9psi Uncorrected - 401rwhp & 400rwtq @ 9psi Tuned By: Pete @ Performance Dyno Affordable Supercharger Build Guide Supercharger Info for Noobs

February 20th, 2010, 03:03 AM	#7
Scott2001GT BYAHHHH! 2001 Mustang GT 13.874 Join Date: Mar 2008 Location: Missouri Posts: 14,628 Blog Entries: 1 iTrader: 3 reviews	IMO 4:10s would be good for 450rwhp below(depending on application) But yea you need a 28in tall for the track but street your fine. Depends what your looking for. There are S197 guys with KB's and TVS with 4:10s and love it. __________________ Precision Turbo\|TurboSmart\|TeamZ\|Strange\|Hellion\|BBK\|SCT\|Edge Converters\|Fairbanks\|CG Fabrications\|Treadstone 4V swap in the works

February 20th, 2010, 03:07 AM	#10
Scott2001GT BYAHHHH! 2001 Mustang GT 13.874 Join Date: Mar 2008 Location: Missouri Posts: 14,628 Blog Entries: 1 iTrader: 3 reviews	they are heavier motors too, trans, and irs yeah. Depends you want a highway monster or track monster? __________________ Precision Turbo\|TurboSmart\|TeamZ\|Strange\|Hellion\|BBK\|SCT\|Edge Converters\|Fairbanks\|CG Fabrications\|Treadstone 4V swap in the works

February 20th, 2010, 03:09 AM	#11
Shaun03GT I Post Entirely Way Too Much 2003 Mustang GT 1/8 - 8.09 @ 91.39mph 1/4 - 12.35 @ 114.52mph Join Date: Sep 2009 Location: Weymouth, MA Posts: 12,063 iTrader: 11 reviews	Lol both. Which is possible to do. Ill do more track then highway. Occasional highway shit, but most id go in a race is like 120...maybe alittle more if it was neck and neck. But Im not into building a full out track car. I wanna make it really good in the twisties too. __________________ 2003 Mustang GT Vortech V1 Intercooled SAE Corrected - 380rwhp & 380rwtq @ 9psi Uncorrected - 401rwhp & 400rwtq @ 9psi Tuned By: Pete @ Performance Dyno Affordable Supercharger Build Guide Supercharger Info for Noobs

February 20th, 2010, 03:11 AM	#12
Scott2001GT BYAHHHH! 2001 Mustang GT 13.874 Join Date: Mar 2008 Location: Missouri Posts: 14,628 Blog Entries: 1 iTrader: 3 reviews	4:10s IMO then. highway I would say 3:73s since your top speed will be higher. but you have a centri, so remember RPM builds boost. __________________ Precision Turbo\|TurboSmart\|TeamZ\|Strange\|Hellion\|BBK\|SCT\|Edge Converters\|Fairbanks\|CG Fabrications\|Treadstone 4V swap in the works

February 20th, 2010, 03:13 AM	#13
Shaun03GT I Post Entirely Way Too Much 2003 Mustang GT 1/8 - 8.09 @ 91.39mph 1/4 - 12.35 @ 114.52mph Join Date: Sep 2009 Location: Weymouth, MA Posts: 12,063 iTrader: 11 reviews	I know i know, I cant do 4.10's...I accually dont want to. The one thing I hate about 4.10's is not really feeling any gear pull that long. It wraps up so quick. Ill just go 3.73's for sure. And have a built rear end too __________________ 2003 Mustang GT Vortech V1 Intercooled SAE Corrected - 380rwhp & 380rwtq @ 9psi Uncorrected - 401rwhp & 400rwtq @ 9psi Tuned By: Pete @ Performance Dyno Affordable Supercharger Build Guide Supercharger Info for Noobs

February 20th, 2010, 03:16 AM	#14
Scott2001GT BYAHHHH! 2001 Mustang GT 13.874 Join Date: Mar 2008 Location: Missouri Posts: 14,628 Blog Entries: 1 iTrader: 3 reviews	so you know you want 3:73s why start a thread lol __________________ Precision Turbo\|TurboSmart\|TeamZ\|Strange\|Hellion\|BBK\|SCT\|Edge Converters\|Fairbanks\|CG Fabrications\|Treadstone 4V swap in the works

February 20th, 2010, 03:20 AM	#15
Shaun03GT I Post Entirely Way Too Much 2003 Mustang GT 1/8 - 8.09 @ 91.39mph 1/4 - 12.35 @ 114.52mph Join Date: Sep 2009 Location: Weymouth, MA Posts: 12,063 iTrader: 11 reviews	I was up in the air about the 3.55s too. Cause they feel sick....but I wanted to hear some other peoples opinions __________________ 2003 Mustang GT Vortech V1 Intercooled SAE Corrected - 380rwhp & 380rwtq @ 9psi Uncorrected - 401rwhp & 400rwtq @ 9psi Tuned By: Pete @ Performance Dyno Affordable Supercharger Build Guide Supercharger Info for Noobs

February 20th, 2010, 03:22 AM	#16
Scott2001GT BYAHHHH! 2001 Mustang GT 13.874 Join Date: Mar 2008 Location: Missouri Posts: 14,628 Blog Entries: 1 iTrader: 3 reviews	don't do 3:55's. __________________ Precision Turbo\|TurboSmart\|TeamZ\|Strange\|Hellion\|BBK\|SCT\|Edge Converters\|Fairbanks\|CG Fabrications\|Treadstone 4V swap in the works

February 20th, 2010, 04:38 AM	#17
GTRACER88 Hardcore Enthusiast Join Date: May 2008 Location: Houston, TX Posts: 2,153 iTrader: 1 reviews	For a supercharger you don't want long gears. Superchargers USE rpms to make power. The faster your engine spins the faster it makes power to the ground. Simple concept. I know this guy who was running 700 rwhp with 4:10 gears and he says he would be dissapointed if he had 3:73. If I were supercharging my car I would keep the 4:10's in. __________________ Super Slow 2011 Grabber blue V6...

February 20th, 2010, 06:22 AM	#18
Smoothgrandmama MasterDeBater 12 GT 8.46@88 1/8 Join Date: Apr 2007 Location: Willis,Texas Posts: 6,893 iTrader: 6 reviews	I have run 3.27's 3.31's 3.55's and 3.73's I have run 220, 240, 260 and 440 rwhp. For a 12-13 sec car I suggest 4.10s. For an 10-11 sec car I suggest 3.73's. I would not run 4.10s on the streets in houston with over 400 hp. __________________ Join The MM Facebook: Modded Mustangs Facebook Vote For Modded Mustangs Ride of the Month Eskimo Brothers To Smooth: Safi, Blitz34, Graystang01, WillTheThrill, Bwal

February 20th, 2010, 11:32 AM	#19
GTRACER88 Hardcore Enthusiast Join Date: May 2008 Location: Houston, TX Posts: 2,153 iTrader: 1 reviews	Personal opinion. Everyone is entitled to one. A buddy of mine has a 680 rwhp cobra has a kenne bell on it, and he has 4:10s and will not change them. __________________ Super Slow 2011 Grabber blue V6...

February 20th, 2010, 12:10 PM	#20
JayC Hardcore Enthusiast 2001 Mustang GT Join Date: Jan 2007 Location: Southern Indiana Posts: 1,333 iTrader: 2 reviews	So much fear for the gear Most people under-gear for silly reasons. That just give us the advantage with our 4.10's __________________ tuned by SPEEDY DYNO 12.41 @ 109 mph w/ CMS stage II cams 11.13 @ 122 mph NX 150 shot Launch soft, shift slow, rev low, stay slow

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