what length rod?
Thread Starter
TECH Veteran
iTrader: (6)
Joined: Feb 2002
Posts: 4,766
Likes: 0
From: Phoenix, AZ USA
what length rod? 388 all bore motor (4.125" bore with stock 3.622" stroke crank). What length rod (6.000", 6.100", 6.125", 6.200", etc...) should I use? I WILL be doing a forged rod (of some kind).
TECH Senior Member
Joined: Nov 2001
Posts: 9,246
Likes: 3
From: Troy, AL
Re: what length rod? "longer rod will give you less cylinder wall pressure."
...Which is a good thing. I'd go with the longest rod you can sqeeze in there that won't cause a ring problem. 6.2s can be used even with 4" strokes so they would certainly be no problem to use with a stock stroke. You just gotta get the right piston to go with them.
Longer rod = lower piston velocity, less side loading of the piston, more time spent at TDC. These are all very good things.
...Which is a good thing. I'd go with the longest rod you can sqeeze in there that won't cause a ring problem. 6.2s can be used even with 4" strokes so they would certainly be no problem to use with a stock stroke. You just gotta get the right piston to go with them.
Longer rod = lower piston velocity, less side loading of the piston, more time spent at TDC. These are all very good things.
Trending Topics
TECH Fanatic
Joined: Feb 2002
Posts: 1,782
Likes: 0
From: Friendswood TX
Re: what length rod? I know its a good thing Colonel 
All I was saying is that they are really easy to find, and maybe even used for cheap. I got my Eagles for a lot cheaper than you can buy them new. Some higher strength rod bolts and im in business. 
All I was saying is that they are really easy to find, and maybe even used for cheap. I got my Eagles for a lot cheaper than you can buy them new. Some higher strength rod bolts and im in business. LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?
Pouria Savadkouei
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
TECH Senior Member
Joined: Nov 2001
Posts: 9,246
Likes: 3
From: Troy, AL
Re: what length rod? I don't really know for a street engine. I have 6.2s in my 4" stroke 434 but it's far from being a street engine. My guess is that it would be fine but I'd want to do some checking first.
