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posted by B20Paul. on Sat Feb 3 01:29 CST 2007
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last visit: Mon Oct 20 10:54 CST 2014

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I've built long rod motors in the past. As long as 158mm with 77.5mm stroke. (for a sub 2 litre engine, 90.5mm x 77.5mm)

longer rods increase the dwell time at TDC. if you need more info than that i'll link you to a bunch of articals and tecnical papers.

Please post the links. My opinions on long rods is that they are a good fix for some overall design flaws. Plenty of people have done back to back tests on typical 350 cube SBC’s comparing 5.7” to 6” long rods & the mechanical advantages of the longer rod are marginal at best. The NASCAR folks use long rods on big ovals, but it’s unlikely that they would on a road circuit. Lots of people talk about the ideal ratio & back in the ‘80’s & ‘90’s that was something around 2:1. Now it’s something around 1.75:1, but if you look in BMW’s & Honda’s best motors they are using around 1.5:1, as do the humungous SBC & SBF with the great heads that are available these days.

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My Turbo 164 project [140-160]
posted by Tim164 on Tue Jan 23 22:20 CST 2007 >

My Turbo 164 project [140-160]
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My Turbo 164 project [140-160]
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My Turbo 164 project [140-160]
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My Turbo 164 project [140-160]
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My Turbo 164 project [140-160]
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My Turbo 164 project [140-160]
posted by Michae1 on Sat Jan 27 19:41 CST 2007 > V
- My Turbo 164 project [140-160]
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  - My Turbo 164 project [140-160]
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        Hey Kyle..... [140-160]
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        Hey Kyle..... [140-160]
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My Turbo 164 project [140-160]
posted by KLR142 on Wed Jan 31 04:53 CST 2007 > V

My Turbo 164 project [140-160]
posted by someone claiming to be wideband on Thu Feb 8 15:10 CST 2007 > V

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Volvo RWD 140-160 Forum

Wait a minute... 140-160