4:30 Gears

03FstStngKB · August 21st, 2008, 03:28 AM

Originally Posted by EThompson6

I think 4.30's are way too much gear for a 2v.

4.30's are a must for an auto IMPO. It is a great street gear and you can still cruise under 3000 rpms if your not a manic on the highway. Drag racing is a different story though. Manuals can get away with 4.10's and still trap pretty high in the 110+ mph range before running out of rpm's. If your going to trap higher than 105+ mph with a 4.30 geared auto then you need to either choose or downgrade to a taller gear or increase the overall diameter of your tire...these two things will get your revs back down so that you may increase your top end speed.

thepizzle44 · August 21st, 2008, 09:37 PM

well i have 315's in the rear for tires with a manual so i should be able to get my revs back down for higher speeds

SMSPerformance · August 21st, 2008, 09:48 PM

the reves between a stock 245/45r17 tire and a 315/35r17 tire will be about the same. they are the close to being the same diameter.

2kGT · August 21st, 2008, 09:48 PM

Originally Posted by EThompson6

I think 4.30's are way too much gear for a 2v.

False. Good gear for a N/A car, especially an automatic.

thepizzle44 · August 21st, 2008, 09:54 PM

yea not plannin on gettin a blower...maybe some nitrous but still deciding

whtpny · August 21st, 2008, 11:25 PM

Originally Posted by SMSPerformance

the reves between a stock 245/45r17 tire and a 315/35r17 tire will be about the same. they are the close to being the same diameter.

actually they seem identical to the first decimal point.. very interesting

SMSPerformance · August 21st, 2008, 11:32 PM

i beleive a 245/74R17 is 25.71" in dia. and a 315/35R17 is 25.79" in diameter so that little bit wont effect the rpms at all.

whtpny · August 21st, 2008, 11:33 PM

yeah i checked it on the calculator and it was identical, good info man

SMSPerformance · August 21st, 2008, 11:36 PM

i found that out researching tires trying to find a larger diameter tire for the back of my car. it looks like i still have the stock springs in the back after putting my roush lower control arms in.

August 21st, 2008, 09:37 PM	#22
thepizzle44 Regular 2003 Mustang GT Con. Join Date: May 2008 Location: RI Posts: 148	well i have 315's in the rear for tires with a manual so i should be able to get my revs back down for higher speeds __________________ SLOW!! Magnaflow Cat Back, BBK Shorty Headers, BBK UD Pulleys, JLT CAI, MSD Coil Packs, Bullitt Deep Dish Soon to Have 4:10 Gears, Eibach Springs, Tokico D Specs, MGW Shifter, Mac Prochamber, Mac Ceramic Coated Long Tubes, Zex Wet Kit

August 21st, 2008, 09:48 PM	#23
SMSPerformance Enthusiast 2002 Mustang GT 13.422@103 Join Date: Jul 2008 Location: Michigan Posts: 865	the reves between a stock 245/45r17 tire and a 315/35r17 tire will be about the same. they are the close to being the same diameter. __________________ Mineral Gray Club Member #3 Winter Plans= FRPP 31 spline trac lok, Moser 31 spline axles, FRPP 3.73 gears. 256RWHP, 299RWTQ All Mods In My Garage

August 21st, 2008, 09:54 PM	#25
thepizzle44 Regular 2003 Mustang GT Con. Join Date: May 2008 Location: RI Posts: 148	yea not plannin on gettin a blower...maybe some nitrous but still deciding __________________ SLOW!! Magnaflow Cat Back, BBK Shorty Headers, BBK UD Pulleys, JLT CAI, MSD Coil Packs, Bullitt Deep Dish Soon to Have 4:10 Gears, Eibach Springs, Tokico D Specs, MGW Shifter, Mac Prochamber, Mac Ceramic Coated Long Tubes, Zex Wet Kit

August 21st, 2008, 11:32 PM	#27
SMSPerformance Enthusiast 2002 Mustang GT 13.422@103 Join Date: Jul 2008 Location: Michigan Posts: 865	i beleive a 245/74R17 is 25.71" in dia. and a 315/35R17 is 25.79" in diameter so that little bit wont effect the rpms at all. __________________ Mineral Gray Club Member #3 Winter Plans= FRPP 31 spline trac lok, Moser 31 spline axles, FRPP 3.73 gears. 256RWHP, 299RWTQ All Mods In My Garage

August 21st, 2008, 11:33 PM	#28
whtpny Hardcore Enthusiast 2002 Mustang GT Join Date: Feb 2007 Location: Gainesville, GA Posts: 1,817	yeah i checked it on the calculator and it was identical, good info man __________________ Mods: Fidanza Al Flywheel, Steeda UDP, EMP/Stewart Components WP, PP Plenum, K&N FIPK, Mac Prochamber, Pypes Violator Catback WhtPny's Videos

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August 21st, 2008, 11:36 PM	#29
SMSPerformance Enthusiast 2002 Mustang GT 13.422@103 Join Date: Jul 2008 Location: Michigan Posts: 865	i found that out researching tires trying to find a larger diameter tire for the back of my car. it looks like i still have the stock springs in the back after putting my roush lower control arms in. __________________ Mineral Gray Club Member #3 Winter Plans= FRPP 31 spline trac lok, Moser 31 spline axles, FRPP 3.73 gears. 256RWHP, 299RWTQ All Mods In My Garage

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