Broken crank pulley
Racer
Joined: Jan 2010
Posts: 296
Likes: 33
From: Virginia Beach VA
You're the man 
As do I
That LT4 and LS7 build video is very cool. There's the hot balance machine in all its glory. It looks really expensive but it sure is neat. I'm assuming the balance at the front is at the pulley and rear at the flywheel, looks like the engine in the video did not require any correction, makes sense since the total unbalance of 0.382 oz-in doesn't exceed the 0.5 oz-in limit. Interesting stuff.
The LS3 build article's link doesn't work, looks like a ... got copied into the web address.
http://www.superchevy.com/how-to/vem...-engine-build/
I never fully understood the dry sump system.. i know i'll have to if i ever want to swap in a 427
As do I
That LT4 and LS7 build video is very cool. There's the hot balance machine in all its glory. It looks really expensive but it sure is neat. I'm assuming the balance at the front is at the pulley and rear at the flywheel, looks like the engine in the video did not require any correction, makes sense since the total unbalance of 0.382 oz-in doesn't exceed the 0.5 oz-in limit. Interesting stuff.The LS3 build article's link doesn't work, looks like a ... got copied into the web address.
http://www.superchevy.com/how-to/vem...-engine-build/
I never fully understood the dry sump system.. i know i'll have to if i ever want to swap in a 427
see if this works
http://www.superchevy.com/how-to/vem...-engine-build/
** now it looks like there's no text caption for the pictures?? I'll find the real article again**
Very expensive machine. The engine actually runs on natural gas for a short time, accelerometers in the machine tell the operator where to add weights if needed. Yes, front plane correction is done via the damper/pulley/balancer. Rear plane correction is done via the flywheel (with the pressure plate also attached).
It's hard to tell in the video shot if that balance was AFTER any weights were installed, or at the beginning check, and none were needed. In any event, yes, 0.5 oz∙in is the target. 0.5 oz∙in or lower.
The only reason the LS3 dry sump went through the same balance is this:
Only LS engines going into manual transmission vettes were taken through the hot balance. LS3 dry sump engines only went in to the C6 grand sports that happened to be manuals.
But wait, the only thing LS7's are going into now are Camaro Z28's, manuals, and they don't... have.... the torque.... tube...... harmonics... "issue"... ??? (SHHHHHHH......)
oh man, did I really just mention that??
Last edited by thbwlZ; Feb 29, 2016 at 04:28 PM.
Team Owner
Joined: May 2001
Posts: 36,836
Likes: 244
From: Dear Karma, I have a list of people you missed.
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
Assuming you're talking only about LS7s, there are lots of LS 427s (and larger) out there running around in a wet sump configuration in C5s. Easily done and much less expensive, especially in a C5.
HTH
Thread Starter
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Joined: Nov 2015
Posts: 88
Likes: 1
see if this works
http://www.superchevy.com/how-to/vem...-engine-build/
** now it looks like there's no text caption for the pictures?? I'll find the real article again**
Very expensive machine. The engine actually runs on natural gas for a short time, accelerometers in the machine tell the operator where to add weights if needed. Yes, front plane correction is done via the damper/pulley/balancer. Rear plane correction is done via the flywheel (with the pressure plate also attached).
It's hard to tell in the video shot if that balance was AFTER any weights were installed, or at the beginning check, and none were needed. In any event, yes, 0.5 oz∙in is the target. 0.5 oz∙in or lower.
The only reason the LS3 dry sump went through the same balance is this:
Only LS engines going into manual transmission vettes were taken through the hot balance. LS3 dry sump engines only went in to the C6 grand sports that happened to be manuals.
But wait, the only thing LS7's are going into now are Camaro Z28's, manuals, and they don't... have.... the torque.... tube...... harmonics... "issue"... ??? (SHHHHHHH......)
oh man, did I really just mention that??
http://www.superchevy.com/how-to/vem...-engine-build/
** now it looks like there's no text caption for the pictures?? I'll find the real article again**
Very expensive machine. The engine actually runs on natural gas for a short time, accelerometers in the machine tell the operator where to add weights if needed. Yes, front plane correction is done via the damper/pulley/balancer. Rear plane correction is done via the flywheel (with the pressure plate also attached).
It's hard to tell in the video shot if that balance was AFTER any weights were installed, or at the beginning check, and none were needed. In any event, yes, 0.5 oz∙in is the target. 0.5 oz∙in or lower.
The only reason the LS3 dry sump went through the same balance is this:
Only LS engines going into manual transmission vettes were taken through the hot balance. LS3 dry sump engines only went in to the C6 grand sports that happened to be manuals.
But wait, the only thing LS7's are going into now are Camaro Z28's, manuals, and they don't... have.... the torque.... tube...... harmonics... "issue"... ??? (SHHHHHHH......)
oh man, did I really just mention that??
Yeah i was going to say about the LS3 article.. Great pictures but the article itself is just an introduction
If you find it with the captions, by all means post up a link. Yeah on second thought it is possible that weights had already been added, but i also think a machine as sophisticated as that would monitor the change from before to after the weights are added because it would also have to indicate where to put the weight, and in the video the machines monitor lit up with "correction not required" and "unbalance stable". I have a feeling that if it showed the engine was unbalanced, the employees would just follow a prompt from that screen. I say this because if after adding a weight the engine is still unbalanced, a weight cannot be put in the same location and the machine would need to decide which balancing hole should be weighted in addition. I may be wrong.
It's one thing to not understand the system and another to assume you'll "have to" if you choose an LS7 swap.
Assuming you're talking only about LS7s, there are lots of LS 427s (and larger) out there running around in a wet sump configuration in C5s. Easily done and much less expensive, especially in a C5.
HTH
Assuming you're talking only about LS7s, there are lots of LS 427s (and larger) out there running around in a wet sump configuration in C5s. Easily done and much less expensive, especially in a C5.
HTH
I'm planning on it
Someone mentioned it in a thread and i looked it up, $55 isn't too bad for quality piece that works great and i can use over and over. It was $30 after shipping on eBay. http://www.ebay.com/itm/291579209955?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT
Team Owner
Joined: May 2001
Posts: 36,836
Likes: 244
From: Dear Karma, I have a list of people you missed.
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
........
Good to know, i guess I'm off the hook and won't have to understand it after all lol. I think i picked up that assumption reading old threads discussing the swap into a C5, where everyone stated the battery would have to be relocated to the rear to make room for the dry sump system. Thanks for correcting me.
Good to know, i guess I'm off the hook and won't have to understand it after all lol. I think i picked up that assumption reading old threads discussing the swap into a C5, where everyone stated the battery would have to be relocated to the rear to make room for the dry sump system. Thanks for correcting me.
