 Rod Ratios, Type 4 |
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| r_towle |
 Jan 2 2007, 11:47 AM
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#1
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Custom Member  Group: Members Posts: 24,705 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States 
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Hi, I searched (Phrase rod and ratio) and got over 1000 hits...
I think search just does not work right...I cant figure it out... Anyways... What is the optimum rod ratio for a type 4. I would like to hear lots of opinions on this one. Rich |
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| Jake Raby |
Jan 2 2007, 10:05 PM
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#2
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Engine Surgeon Group: Members Posts: 9,398 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
Optimum rod ratio is dictated by the RPM range goal for the engine as well as the cam and head work as well as the longevity goal...
For engines I design I shoot for 1.75:1 for street engines, but I have some powerful combos that run as little as 1.55:1. Our race engines that sustain RPM use 2:1 or more There is no perfect rod ratio for the engine. "Its all in the combo". as always. |
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Posts in this topic
r_towle Rod Ratios Jan 2 2007, 11:47 AM
smontanaro Try
+rod +ratio
Skip Jan 2 2007, 12:27 PM jd74914 According to BrettW in this thread the optimal typ... Jan 2 2007, 12:35 PM jd74914 Hmm . . . this graph migh interest you, as well as... Jan 2 2007, 12:41 PM Twystd1 What are you looking for as far as HP / TQ..????
... Jan 2 2007, 01:18 PM
Borderline Dema Elgin (local SF Bay area cam grinder) has an ... Jan 3 2007, 12:39 AM |
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