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01-27-2012, 04:35 AM | #101 |
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Join Date: Feb 2008
Location: Sacramento, Ca
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Re: Gears - to answer the questions once and for all
yes exactly!!! ive posted videos and people still cant believe it.. they just cant get over the "feeling" and "visual" (rpm tach) of 410s and up...
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2003 Mach 1 5spd Black with IUP Engine Mods: cone filter, Crower stage 2 cams, Hooker long tubes, SLP Powerflo exhaust Rear end: Cobra diff, moser axles, 3.73 gears, Ford Racing aluminum driveshaft Suspension: Eibach Pro kit with poly isolators And some other small things... 348.6/331.6 sae |
01-27-2012, 08:14 AM | #102 |
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Join Date: Apr 2003
Location: Phoenix, AZ
Posts: 2,336
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Re: Gears - to answer the questions once and for all
Unless there is a difference in the parasitic loss I don't see how the car would know the difference between 355's and 410's from a roll? Running two different ratio's against each other would give one or the other an advantage depending on the speed/rpm of the start.
The exception would be a car with a blower/turbo. |
04-18-2012, 02:41 PM | #103 |
What's Shakin'
Join Date: May 2011
Location: St Albert Alberta
Posts: 706
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Re: Gears - to answer the questions once and for all
The majority of any gear set difference will be off the line and in the first two gears, once the ratio of 3rd with 3.73 as opposed to say 4th with 4.30, (may not be an exact calculation) add up they will be the same. It's the combination of the two ratios at any given speed that will be the comparison.
Also, if you are running the 1/8 mile and you are shifting with a 100 feet of track left, you should either gear up so you shift earlier, my choice, or go with a slightly taller tire so you dont have to shift at all.
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1971 Mustang Coupe Sold 1985 Mustang GT T-tops Sold 2003 Azure Blue IUP Automatic One of 453 #2290 of 9652 Built on February 24th 2003 Eibach Pro-Kit, no ISO's in rear Magnapacks CatBacks Mac O/R X-pipe K&N Drop in filter 4.10 Ford Racing Gears SCT Tuned by Bama Best 1/4 13.34 @ 104.40 Instagram @johnny_kipp |
09-04-2013, 12:23 PM | #104 |
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Join Date: Aug 2013
Location: lowell, in
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Re: Gears - to answer the questions once and for all
should i go 3:90 or stay 3:55 on my automatic 03 mach with a p1 procharger.... my friend had 3:90s on his 99 cobra and i was def impressed.... if anyone has tried one on a blown mach id love to see what ya thought
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09-20-2013, 03:14 PM | #105 |
LS1-stock
Join Date: Dec 2003
Location: Chandler, AZ
Posts: 1,550
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Re: Gears - to answer the questions once and for all
I guess I should update this thread with another calculation since this seems more appropriate now for my garage queen mach...
4th gear (1:1), trap speeds at 6100rpm (stock engine peak) 6500 rpm (minor bolt-ons shift point), 6800 rpm (psr/cobra cams shift point) HTML Code:
26" tire: Gear 6100rpm 6500rpm 6800rpm 3.55: 133 141.7 148.2 3.73: 126.5 134.8 141.1 3.90: 121 129 134.9 4.10: 115.1 122.7 128.3 4.30: 109.8 117 122.4 4.56: 103.5 110.3 115.4 28" tire: Gear 6100rpm 6500rpm 6800rpm 3.55: 143.2 152.6 159.6 3.73: 136.3 145.2 151.9 3.90: 130.3 138.9 145.3 4.10: 124 132.1 138.2 4.30: 118.2 126 131.8 4.56: 111.5 118.8 124.3 4.88: 104.2 111 116.1
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2013 gt - TBD 2004 mach1 - 12.31@110.17, 1.645 60' - SOLD |
09-20-2013, 05:27 PM | #106 |
Dark Knight
Join Date: Nov 2009
Location: Albuquerque, NM
Posts: 5,759
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Re: Gears - to answer the questions once and for all
For what its worth, my buddy went from being really far back in his bolt on 3V to being a lot closer to my Mach when he switched from 3.30s to 4.10s.
However he only traps 96mph vs my 104mph. (282hp dyno vs my 315hp).
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Vortech V2 S-trim, E85, A2A Treadstone, Comp cams, built engine, full exhaust, built rear, built 4r70, more mods. Tuned by me with SCT Advantage |
03-21-2018, 02:24 PM | #107 |
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Join Date: Jan 2018
Location: Central Kentucky
Posts: 161
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Re: Gears - to answer the questions once and for all
In our group, all the guys had 4.10 gears with a few bolt ons. I was stock with 3.27s (we're talking GTs here). In street races, I'd stay fender to fender with them every time, whether from a dig or from a roll. After I did some bolt-ons but left the gears stock, I started to pull on them. They couldn't figure out why and swore that I had nitrous or something. Nope...it's just that while my car was winding out, they were in the next lane shifting like crazy.
So... for this Mach 1 I'm planning to leave the 3.55s in place. Car seems to pull really well against highly modded 3V cars, so I'm happy with it.
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2003 Mach 1 - TR3650 - Mac O/R H-pipe - Ford Racing driveshaft - Modified air intake - Nitto Motivo 315/35s on 10.5" FR500 wheels - Steeda clutch adjuster |
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