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04-29-2002, 07:43 AM
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#1 |
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Registered User
Join Date: Mar 2002
Location: Bondurant, IA but in Worcester, MA for school
Posts: 767
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4.57s Too Much???
I have a 1970 C-20 Camper Special and it looks like I have 4.57s in the rear. I am making my truck into a nice dropped sport truck and was wondering the 4.57 will get me off the line real good right? and how much worse of the line will 4.11s be? Or what do you guys recomend I put in the back to get the best off the line/top end? BTW its a 350cid with a TH350 tranny. Thanks for the help
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1970 Chevy C-20 350 V-8 Turbo 350 w/ shift kit Dana 60 w/ 4.10 gears AND Powr-Loc POSI New Additions: Summit Headers 135amp alternator Proform HEI Edelbrock 1406 600cfm carb Sunpro Tach Powr-Loc POSI Edelbrock Performer RPM Intake MSD 6A Ignition Box AIM: HotRod929 Visit My Site: http://1970chevy.netfirms.com/ |
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04-29-2002, 08:33 AM
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#2 |
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Registered User
Join Date: Aug 2001
Location: rock island,il,usa
Posts: 5,382
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IMO,the best all around gear(based on about a 28" tall tire ),is a 3.73. I have 1/2 ton parts under the longhorn,& run a 275/60/15 tire(28" tall). My 12 bolt has 4.10 richmond coggs. The combo is a lot of fun,but I dont reccomend a lot of long road trips,rpm @ 60 is 3000-3100. I can crank it up to 125,but am runnin 6200-6300 at that speed.......69 longhorn.
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http://community.webshots.com/user/hotrodhorn |
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04-29-2002, 09:02 AM
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#3 |
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Account Suspended
Join Date: May 2000
Location: IL
Posts: 0
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youe not gonna want ot use that 3/4 topn rear for pewrformance though, gonna want a smaller rear like a dana axle or 13 bolt or 8 3/4 chrysler or something thats not a full floater, you would have to build one hell of a hi revving engine for use with 4.57 gears, youll be redlining all over the place, steel crank hi duration cam, lots of stall, lots of $$$$$$$
------------------ Randy- Lincoln, IL randy@ccaonline.com 2177353230 -71 C-10 350/CH465/3.07, assemble it, yeah right, that'll happen in this world,(not) -84 Z28 Camaro 5.0L 700R4, 3.73, beater, paid way too much for it like an idiot,, -84 Firebird SE 2.8L T-5, rod knocking, dammit,, -82 Firebird 350 4bolt (TBL)/TH350, not running, dammit... buy/sell/hoard/trade most any GM vehicle parts of any kind -parting out: '81 Cutlass Supreme Brougham *Paint is overrated © RSS Enterprises 2000 |
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04-29-2002, 09:50 AM
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#4 |
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Senior Member
 
Join Date: Jan 2001
Location: Orem, Utah
Posts: 7,854
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I have the eaton 4.57 in my 3/4 ton. I all you want to do is smoke some tires, it's great. If you want to go over 65, it sucks. I'm in the process of converting a newer 3.73 posi to fit my suspension.
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I have sworn upon the altar of God, eternal hostility against every form of tyranny over the mind of man. - Thomas Jefferson |
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04-29-2002, 10:27 AM
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#5 |
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Registered User
Join Date: Mar 2002
Location: Bondurant, IA but in Worcester, MA for school
Posts: 767
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What is the best toss up b/w acceleration and top end for my truck? I still wanna be able to kick little imports a$$!!!
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1970 Chevy C-20 350 V-8 Turbo 350 w/ shift kit Dana 60 w/ 4.10 gears AND Powr-Loc POSI New Additions: Summit Headers 135amp alternator Proform HEI Edelbrock 1406 600cfm carb Sunpro Tach Powr-Loc POSI Edelbrock Performer RPM Intake MSD 6A Ignition Box AIM: HotRod929 Visit My Site: http://1970chevy.netfirms.com/ |
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04-29-2002, 10:32 AM
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#6 |
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Do it well or don't do it
Join Date: Apr 2002
Location: Georgia
Posts: 457
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I'd agree with 69 longhorn 3:73 would be the best compromise.
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Try to be the person your dog thinks you are. Excellent paint and body site: http://www.autobody101.com/ Visit my Web Site http://home.attbi.com/~agfosteriii |
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04-29-2002, 03:18 PM
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#7 |
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Registered User
Join Date: Aug 2001
Location: Wichita Kansas
Posts: 104
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I have a BB with 3.73 gears and I must advise you not to go with anything bigger unless you are sporting tall tires or have a 700R4 or equivelant if you plan on making this a daily driver. As far as getting off the line it is awesome. I can burn them in 1st and lay a heavy scratch in 2nd but like mentioned in earlier replies you will be rev'n the heck out of it when you get to highway speeds. At 65 MPH I am at 3900-4000 RPM's. If you got the cash throw in a new tranny with O/D then you will have the best of both worlds :> )
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1972 Cheyenne Super 88K miles 2002 Impala (real nice) http://community.webshots.com/user/shawn72chevy Wichita, KS |
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04-29-2002, 04:56 PM
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#8 |
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now thats a true COON DOG
Join Date: Nov 2000
Location: Franconia, NH
Posts: 1,977
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I also argee with the 3.73's Butt I deffentlly would NOT go any taller then 4.11's!
------------------ 71 SWB Stepside, was a 250, now is a 402 Big Block with 4 speed and 3.73's 72 LWB 4x4 350 4-speed 3.08's posi wearing army olive drab green (SOLD!) 68 BURB 50TH LOOKALIKE with built 350 4-speed 4.11's and posi
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current project 67  402BB stout th350 3.08's with a locker. Plan on tubs 18.5's out back! (thanks Burnsman!)71 SWB Stepside, was a 250, now is a 402 Big Block with 4 speed and 3.73's ( was crushed by a tree, bed sold, motor pulled)  was my first truck!... oh well...72 LWB 4x4 350 4-speed 3.08's posi wearing army olive drab green (SOLD!) 68 BURB 50TH LOOKALIKE work in progress, soon to have 250-I6 with a 3-speed on the tree 4.11's and posi ( currently sitting in back yard tarped awaiting time, $$$, and lots of love!) 67 1 TON- work truck 396 sm 420 4-speed, flat bed 4.57 gears "big red" (my first landscape truck, very rusty and crusty! but still gets the job done when needed!) |
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