Longer Rods, Higher CR?
Supreme Member
Joined: Jan 2002
Posts: 3,852
Likes: 1
From: Valley of the Sun
Car: 82 Z28
Engine: Al LT1 headed LG4 305
Transmission: TH350
Axle/Gears: 3.73 posi with spacer
Because you get pistons with the coresponding change in compression height, so that the piston ends up in the same place.
Supreme Member
Joined: Apr 2000
Posts: 1,338
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From: Chander, Arizona USA
Car: 2006 Silverado 1500
Engine: 5.3L
Transmission: 4L60E
he's correct. you don't just switch rods without switching pistons. if you didn't, you'd have a piston meeting the cylinder head. 6 inch rods do allow you to run a bit higher compression than the 5.7 rod without detonation though.
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Senior Member
Joined: Aug 2001
Posts: 972
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From: Memphis, Tn
Car: 92' RS
Engine: 357
Transmission: TH350
Axle/Gears: 4.10
Thanks guys. Reason i asked is b/c i just read a post about a guy if he should use 5.7 or 6.0 rods and thy said nothing about using a different set of pistons than the ones he was going to use.
Supreme Member
Joined: Apr 2000
Posts: 1,338
Likes: 0
From: Chander, Arizona USA
Car: 2006 Silverado 1500
Engine: 5.3L
Transmission: 4L60E
nope, when i first got it, it was only good for 16.3. planning to break into the 14's before winter. i've also pulled off a 2.137 60' with it.
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