Just needed to know before I got worried that I was gonna blow my new motor 
Pinning crank?
Pinning crank? You guys are going to have to forgive my mild retardation on the matter. I have a tendency to over read and over think when working on my car and wind up with more questions and concerns than I need.
Going turbo this winter and just making sure that I don't need to pin my crankshaft. From everything I've read this seems to be something done for supercharged cars. Am I right thinking that? Just making sure this isn't something I should be doing before I crank up the boost. Thanks guys!
Going turbo this winter and just making sure that I don't need to pin my crankshaft. From everything I've read this seems to be something done for supercharged cars. Am I right thinking that? Just making sure this isn't something I should be doing before I crank up the boost. Thanks guys!
On The Tree
Joined: Aug 2011
Posts: 131
Likes: 0
From: Lakeland, Fl
A supercharger is driven off of the crankshaft, a turbo is not. Superchargers put a lot of strain on a single keyed crankshaft and will often shear the key. The engine is seeing instant boost with a supercharger. Your engine will not until the turbo spools up.You should not have that issue with a turbo.
The LS1 crank is NOT pinned from the factory. If supercharged, the blower puts alot more stress on the engine and can cause the balancer to spin on the crank. Its less than $100 for the front pinning kit and the piece of mind is priceless.
https://ls1tech.com/forums/forced-in...nning-kit.html
And it has nothing to do with my question. Like I said I searched and searched and only saw pinning cranks on supercharged applications, not turbo. I get the piece of mind thing but in theory a turbo setup shouldn't place much additional stress on the balancer/crankshaft relationship since it's not belt driven and won't be spinning past the stock rev limiter. Am I right in thinking that or is it simply the additional power that adds the stress?
Last edited by Adam86; Nov 7, 2011 at 10:43 PM.
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The additional power would allow the engine to build RPM faster thus putting more stress on the crank. It would probably be ok, but for under $100 I'd do it for safety. The Front pinning kit takes like half an hour and dosent require the balancer to be removed. Its also my belief that this way is stronger and has alot less chance of the pin breaking.
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