Boost and engine bearings
Thread Starter
Joined: Sep 2007
Posts: 4,188
Likes: 292
From: woodbine, md
Boost and engine bearings I pulled my 6.0 apart to send to the engine shop for its winter rebuild
I orig did a stock rebuild, new bearings, hone the rust out of the cyls., rings,
good cleaning-anyway, I noticed the thrust bearing took a beating on the side toward the trans-I ran an old 13" switch/pitch conv. and trans (dual stall) I wonder if I had some ballooning issues on the converter
I had used this trans in prev. engines with no problems, and the thrust bearing was within specs-I also noticed the upper bearings in the rods showed the effects of boost I guess, lol
Curious if anyone has had any thrust bearing problems under boost-it gets a new trans and conv. (anti balloon plate)
I orig did a stock rebuild, new bearings, hone the rust out of the cyls., rings,
good cleaning-anyway, I noticed the thrust bearing took a beating on the side toward the trans-I ran an old 13" switch/pitch conv. and trans (dual stall) I wonder if I had some ballooning issues on the converter
I had used this trans in prev. engines with no problems, and the thrust bearing was within specs-I also noticed the upper bearings in the rods showed the effects of boost I guess, lol
Curious if anyone has had any thrust bearing problems under boost-it gets a new trans and conv. (anti balloon plate)
Thread Starter
Joined: Sep 2007
Posts: 4,188
Likes: 292
From: woodbine, md
Playing with the man. boost controller it slipped up to 15 lbs on 93 octane, I had 18 degs total dialed in
Pistons were perfect, they said the rod bearings were ok-I suspect the converter, its like 1965 tech., lol
I was up at ATI yesterday getting a new balancer, checking out some diff converters-tried to borrow the COPO engine, no dice, lol
There was some chatter on YB about adding oil feed to the back side of the thrust bearing
Pistons were perfect, they said the rod bearings were ok-I suspect the converter, its like 1965 tech., lol
I was up at ATI yesterday getting a new balancer, checking out some diff converters-tried to borrow the COPO engine, no dice, lol
There was some chatter on YB about adding oil feed to the back side of the thrust bearing
Playing with the man. boost controller it slipped up to 15 lbs on 93 octane, I had 18 degs total dialed in
Pistons were perfect, they said the rod bearings were ok-I suspect the converter, its like 1965 tech., lol
I was up at ATI yesterday getting a new balancer, checking out some diff converters-tried to borrow the COPO engine, no dice, lol
There was some chatter on YB about adding oil feed to the back side of the thrust bearing
Pistons were perfect, they said the rod bearings were ok-I suspect the converter, its like 1965 tech., lol
I was up at ATI yesterday getting a new balancer, checking out some diff converters-tried to borrow the COPO engine, no dice, lol
There was some chatter on YB about adding oil feed to the back side of the thrust bearing
Playing with the man. boost controller it slipped up to 15 lbs on 93 octane, I had 18 degs total dialed in
Pistons were perfect, they said the rod bearings were ok-I suspect the converter, its like 1965 tech., lol
I was up at ATI yesterday getting a new balancer, checking out some diff converters-tried to borrow the COPO engine, no dice, lol
There was some chatter on YB about adding oil feed to the back side of the thrust bearing
Pistons were perfect, they said the rod bearings were ok-I suspect the converter, its like 1965 tech., lol
I was up at ATI yesterday getting a new balancer, checking out some diff converters-tried to borrow the COPO engine, no dice, lol
There was some chatter on YB about adding oil feed to the back side of the thrust bearing
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
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
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
TECH Resident
Joined: Oct 2009
Posts: 793
Likes: 0
From: Michigan
Trans line pressure. I've seen line pressure up to 220 psi. Most of the time it's not a ballooning converter but a charge pressure issue. It's very common on high hp race set ups.
TECH Apprentice
Joined: Mar 2006
Posts: 361
Likes: 1
From: australia
its a combination of line pressure and converter outlet pressure ( or some ppl call it cooler pressure )
what goes in must come out
if the restriction is soo great , in the plumbing , internal clearances , stator tube / input shaft ....the converter expands
putting excessive thrust on crank..
converter oulet pressure ( or cooler pressure as some call it ) is required / used / adjusted in some applications to get more lockup , less slip in some design converters
our glides run 270 psi line pressure
0 issues on cranks
what goes in must come out
if the restriction is soo great , in the plumbing , internal clearances , stator tube / input shaft ....the converter expands
putting excessive thrust on crank..
converter oulet pressure ( or cooler pressure as some call it ) is required / used / adjusted in some applications to get more lockup , less slip in some design converters
our glides run 270 psi line pressure
0 issues on cranks
You can do some research over on YB in the trans section.
Don't expect a 100% definitive answer, but the general consensus is that you need to limit converter pressure.
Line pressure plays a roll, but with a manual VB, the line pressure is high by design.
I don't have a manual VB, my line pressure is approx 180 psi.
There is a feed restriction that can be added to the front pump that reduces converter pressure. I did it to mine even though I wasn't having any noticeable issues. Was suggested by several trans builders. I have a TH400. It's pretty easy to do.
Converter performance (PTC) was unchanged.
Ron
Don't expect a 100% definitive answer, but the general consensus is that you need to limit converter pressure.
Line pressure plays a roll, but with a manual VB, the line pressure is high by design.
I don't have a manual VB, my line pressure is approx 180 psi.
There is a feed restriction that can be added to the front pump that reduces converter pressure. I did it to mine even though I wasn't having any noticeable issues. Was suggested by several trans builders. I have a TH400. It's pretty easy to do.
Converter performance (PTC) was unchanged.
Ron