ce in 3.55 and 3.73 gears?

1jimmy__d · 03-17-2003, 09:51 PM

just wondering the difference in 1/4 mile times (if any) between these two gears. my 89 had 3.73's and my 90 has 3.55's. with all the mods my 90 has, the 89 feels so much more quicker throught first and second gear. itt actually throws you back in the seat pretty good. the 90 with 3.55's doesnt feel as quick to me from start. i know the 90 should kill the 89, but does anyone know if there is a difference between the gears in the 1/4 mile? if so, i may switch to 3.73's

thanks-

Coupe50h · 03-17-2003, 10:01 PM

You Feel harder accelleration with 37's, but time difference not much, or any, my friend went 373 to 410 and saw no e.t. gain, but it felt snappier on takeoff, if you swap gears, get 410 to feel a bigg difference, might get a tenth at the track, with slicks the more gear the better at the track.

Ackbar00 · 03-18-2003, 12:45 PM

Yeah, what he said.

03-20-2003, 04:11 PM

Quote:

Originally posted by 1jimmy__d
just wondering the difference in 1/4 mile times (if any) between these two gears. my 89 had 3.73's and my 90 has 3.55's. with all the mods my 90 has, the 89 feels so much more quicker throught first and second gear. itt actually throws you back in the seat pretty good. the 90 with 3.55's doesnt feel as quick to me from start. i know the 90 should kill the 89, but does anyone know if there is a difference between the gears in the 1/4 mile? if so, i may switch to 3.73's thanks-

3.73s are a little quicker than 3.55s...but I've had both & you can't tell that much of a difference. I think the difference that you are feeling is that the car you bought with the Holley Systemax combo on it with heads/cam/intake...your powerband has changed. Your '89 with the stock motor in it produces tons of torque and can really snap your neck back when nailed at low rpms, especially with the 3.73s. Your new motor probably doesn't make as much torque as the '89 motor does at low rpms...between 1500-2500. But once you get the motor in the '90 up to 3000+rpms...that's when it makes all the power!

And obviously the power in the '90 motor continues on up way higher in the rpm range than the '89 stock 302, pulling hard to 6000rpms or maybe even a tad higher. 3.73s would better suit your Holley combination. Or if your car sees a lot of track time (1/4 mile) & not as much street use...you could go for the 4.10s.

Dark_5.0 · 03-21-2003, 05:57 PM

3.55's are the absolute worst gear other than stock. I would rather have 3.27's than 3.55's

The reason being that you end up hitting 4th gear just as you are crossing the line and that hurts your ET.

Coupe50h · 03-23-2003, 01:20 AM

Quote:

Originally posted by Dark_5.0
3.55's are the absolute worst gear other than stock. I would rather have 3.27's than 3.55's

The reason being that you end up hitting 4th gear just as you are crossing the line and that hurts your ET.

I dont know dark50, i have never driven 3.55, but that's what my 3.27's do, i seem to hit my shift point right befor i cross, and im running out of rpm in 3rd, but going to 4th will cause me to coast over the line, all in all i think i do pretty well with these, im getting off the line rather quickly for the ratio it has.
i do know when i swap, it will be 37, or 410.

Dark Knight · 03-24-2003, 12:27 PM

I like the 3.55's in mine, 6100 thru the traps in 3rd gear...
tire size has a big effect on the ration too..

I also ran 4.30's too..they pulled HARD off the line..but freeway driving sucked.. went thru the traps at the same rpm.. but in 4th..
not a big difference in ET though..

03-17-2003, 09:51 PM	#1
1jimmy__d Registered Member Join Date: Apr 2002 Posts: 299	ce in 3.55 and 3.73 gears? just wondering the difference in 1/4 mile times (if any) between these two gears. my 89 had 3.73's and my 90 has 3.55's. with all the mods my 90 has, the 89 feels so much more quicker throught first and second gear. itt actually throws you back in the seat pretty good. the 90 with 3.55's doesnt feel as quick to me from start. i know the 90 should kill the 89, but does anyone know if there is a difference between the gears in the 1/4 mile? if so, i may switch to 3.73's thanks- __________________ 90 lx hatch, holley systemax II kit, rebuilt 302, BBK 155 lph fuel pump, pro M bullet mass meter wtih BBk cold air intake, 30 # injectors, 70 mm TB, jacobs ignition system, edelbrock water pump, BBk longtube headers with h-pipe, flowmasters, b&m ripper shifter, 3.55 gears, Proform electric fan, subframe connectors/removed smog pump and ac! 75 shot of nitrous! 13.2 at 112 1/4 mile- no traction!

03-17-2003, 10:01 PM	#2
Coupe50h Registered Member Join Date: Aug 2002 Location: SanAntonio, Tx Posts: 957	You Feel harder accelleration with 37's, but time difference not much, or any, my friend went 373 to 410 and saw no e.t. gain, but it felt snappier on takeoff, if you swap gears, get 410 to feel a bigg difference, might get a tenth at the track, with slicks the more gear the better at the track. __________________ X-Texas highway patrol ssp 1990 coupe - exploder Gt-40 iron heads, Explorer intake, 19 lber's. E-cam. crane 1.7 rollers. 190fp. 75mm maf. 65mm tb, tubular subframe connectors, mac cai, Asp crank pulley, T-5, king cobra clutch, flowtech 1-5/8 unequals, mac X-pipe Frpp driveshaft, lakewood Lca's. race weight 3,160 12.69 @ 107.35, 1.71 60' 26x8.5 drag's 3.90 gear 13.20 @ 106.91 - 235/60/15 firestones 2.3 60' 3.27 gear

03-18-2003, 12:45 PM	#3
Ackbar00 Rebel Fleet Commander Join Date: Oct 2001 Location: Huber Heights, OH Posts: 1,003	Yeah, what he said. __________________ 1993 Mustang GT, PTK w/ T-64 - My Cardomain Webpage 11.25@123.5 on only 8 psi. 10.84@121 on only 1 headgasket "The Truth is, Your the Weak, and I am the Tyranny of Evil Men!"

03-21-2003, 05:57 PM	#5
Dark_5.0 Registered Member Join Date: Apr 2001 Location: Staging lane Posts: 4,337	3.55's are the absolute worst gear other than stock. I would rather have 3.27's than 3.55's The reason being that you end up hitting 4th gear just as you are crossing the line and that hurts your ET. __________________ 92' LX-Big brakes, Lots and lots of suspension, GT40X heads, Ported cobra intake, stock cam, Vortech SC trim. 00' Lightning-Stock 88'CRX-13 second ego killer

03-24-2003, 12:27 PM	#7
Dark Knight Registered Member Join Date: Oct 1998 Location: Az Posts: 854	I like the 3.55's in mine, 6100 thru the traps in 3rd gear... tire size has a big effect on the ration too.. I also ran 4.30's too..they pulled HARD off the line..but freeway driving sucked.. went thru the traps at the same rpm.. but in 4th.. not a big difference in ET though.. __________________ 84 convt,roller 302,AFR's, performer 3.55's, underdrives BBK shorties stock cam, 1.7's 13.58@102.84 and a '68 stang .. project 8 sec street car... 557 big block + N20 :-) http://members.cox.net/darkknight302/68nwrear.jpg

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
3.73 gears	roundeye82	Modular Madness	12	11-29-2003 04:20 PM
3.73 gears	ghostfacedriver	Modular Madness	3	08-28-2003 04:33 PM
RPM With 3.73 gears	Badass_yellowGT	Modular Madness	2	07-15-2002 01:39 PM
AdjustTiming & 3.73 Gears install	Blue01GT	Modular Madness	2	03-20-2002 02:46 PM
3.55, 3.73 or 4.10	Mouse Eater	Windsor Power	12	01-15-2001 08:03 AM