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11-30-2012, 03:19 PM
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#1 |
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Registered User
Join Date: Mar 2005
Location: el paso tx
Posts: 133
iTrader: (0) Bronco Info: '79 400m 0.30 over comp cam edelbrock intake/carb double exhaust 4in lift 33in bfgs
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gearing advice
Hey guys looking for some advice. I have a 79 bronco with a 400 0.30 over edelbrock alum intake, comp cam, howell tbi, detroit on back running 33 tires.
I dont think truck is underpowered. I mostly run sand dunes and on long hill climbs truck maxs out would regearing help out any???? On highway it does approx 2-2300RPM at 60mph |
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11-30-2012, 04:22 PM
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#2 |
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Fullsize Member
 
Join Date: Oct 2010
Location: Emerald, PA
Posts: 1,987
iTrader: (8) Bronco Info: 94 C150, 351/zf,5"lift,35" xterains,flow40, mac headers,sag swap, elec fan, 4WDB
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What is your current gear ratio?
__________________
 It's not custom if you bought it from a catalog! Visit my build thread- http://www.fullsizebronco.com/forum/...d.php?t=211825 |
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11-30-2012, 04:34 PM
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#3 |
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TTB for short
Join Date: Nov 2003
Location: The House that Peter Bilt
Posts: 2,206
iTrader: (0) Bronco Info: '95 L,'93 Bronc,'96 Turbo Dizzle
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Whats the rpm range on the cam and intake? That will be the major factor...
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Charity is injurious unless it helps the recipient to become independent of it. John D. Rockefeller |
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11-30-2012, 09:32 PM
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#4 |
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Registered User
Join Date: Mar 2005
Location: el paso tx
Posts: 133
iTrader: (0) Bronco Info: '79 400m 0.30 over comp cam edelbrock intake/carb double exhaust 4in lift 33in bfgs
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Im running stock gears 3.5? Forgot to mention that in 4 hi it feels likevit wont even move so always wheel in 4 lo
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12-01-2012, 03:26 AM
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#5 |
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Driving Stuff Henry Built
Join Date: Oct 2006
Location: Pasadena, CA
Posts: 4,172
iTrader: (9) Bronco Info: -90 xlt, 351w, e4od, 3.55:1, sag, warn hubs, trans cooler, 35" bfg m/t, -73, 400, np435, 35s
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Sure, lower gears would give you more torque to the wheels. The trade off is higher revs on the highway, but your truck would probably appreciate it on the hills. 33's are larger than stock, so you currently have less torque to the wheels than it started out with.
Here's a good Gear Ratio Calculator. Plug in your current info on one side, & your new combo on the other, then hit Calculate on each to see what effect the changes will have.
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Baba Looey's Favorite FSB Links........................Common Replies to FAQs   “Don't find fault, find a remedy.” -Henry Ford |
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12-01-2012, 11:57 AM
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#6 | |
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Fullsize Member
Join Date: Jul 2009
Location: Florida
Posts: 1,480
iTrader: (1) Bronco Info: 90' 351/E40D 38" tires, 4.88 gears, full float 8.8, lockers F&R
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Quote:
1. Does it bog down and down shift. 2. Or do you mean that you are spinning the wheels as fast as you can in 3rd gear-low range and want more wheel speed? If 1, (hard to believe in low range) keep it in 2nd. If 2, get bigger tires. I think your gears are OK. |
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