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Author Topic: 38" vs 47"  (Read 3593 times)

Offline Irish_Alley

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38" vs 47"
« on: March 30, 2009, 12:18:44 am »
this is what i have now 38" w/ 456 ratio and 465 tranny. when I'm doing 50 my rpms are about 2000 but if i put the 47s on it will be doing about 1600. now my question is will this lower my rpms too low. the set up now limits me to about 70 mph, with the 47 I'm think more bout 85 not saying ill go that fast but when on the highway when the speeds 65 I'm pushing the engine to hard so it will help me out there. but my main concern is on take offs, I'm thinking ill have to use Granny allot more than b4. any help on this situation would be helpfull
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Offline JRConnieK10

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Re: 38" vs 47"
« Reply #1 on: March 30, 2009, 10:32:25 am »
With the same transmission as you have when I had my 44"s I ran a 5:38 gear it was great for highway and I also put a speed ratio converter so my speedo was accurate @65mph I turned around 2300.
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'85 K10 LWB 350/SM465
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Offline Irish_Alley

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Re: 38" vs 47"
« Reply #2 on: March 31, 2009, 02:12:29 pm »
as much as i would like to have the 47s its just going to be too much i think for driving on road more than off.
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If you can’t tell yourself the truth, who can you tell it to?~Irish_Alley

When you have eliminated the impossible, whatever remains, however improbable, must be the truth ~Sherlock Holmes
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