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Old 03-31-2015, 01:28 PM   #19
SCOTI
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Join Date: Apr 2001
Location: DALLAS,TX
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Re: Manifolds VS Headers round two thousand

Quote:
Originally Posted by Bigstevex4 View Post
Ok agree about gears got a 90 jimmy with 410s and 36s set up works good and sucks gas on hyway.
Found a cool calculater for eng rpm speed and diff and tran ratios.
http://www.csgnetwork.com/multirpmcalc.html
Other than putsing around a small town 25 mph has a nice tourgy Rpm 3rd its quite and low rpm 35 and 45 are good in 3rd. I live 7 blocks from I90 In western south dakota. So jump on it 75 MPH soon to be 80 with 273s will be 2450rpm 4th with 373s you can add amost a grand to that. with my trans 3rd you can run it up to 65 easy like 3800. if i did any gear change to diff would be more like 308s. I other than snow have not been able to do Less than 75 because of traffic in the 50 miles to rapid city. since moved out Denver 5 yrs ago.
Then if not changing gears, I would change the motor. Get some Vortec heads (or similar EX: high velocity @ lower valve lift levels) & a smaller (torque producing) cam profile.
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Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive.
It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar.....

Cubic inches is like Indiana Jones with a cheap pistol.
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