forcd ind

iTrader: (7)

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)

69-chvl

iTrader: (11)

Forced, how much boost/timing and what fuel were your running?

3 window

iTrader: (1)

I'd definitely go with a converter with a balloon plate. Big power wreaks havoc on a thrust bearing with a regular converter.

RonSSNova

iTrader: (3)

Hmm. Interesting.
I'll have my L33 out and apart in the next week or so and I'll let you know what it looks like.
2 years and 80 passes.
Should be interesting.

forcd ind

iTrader: (7)

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

3 window

iTrader: (1)

Ford guys have been doing this truck for a long time. You drill perpendicular to the oil galley and it sprays right onto the thrust surface of the crank. Could probably just do the old gen 1 trick f chamfering the parting line from the groove backward. I've done it myself successfully in the past.

rotary1307cc

iTrader: (5)

Setup the trans correctly and no mods needed and will come out looking peach

rotary1307cc

iTrader: (5)

If you had balloned the converter you would of known it on disassembly

Tjabo

Please elaborate on what items to watch out for! Hopefully I'm not the only one who doesn't know what the details are of "setting up the trans CORRECTLY." Lol

LASTLS1

iTrader: (7)

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.

Tjabo

What does the high line pressure do that creates issues with the thrust bearing? Does it push forward on the converter somehow?

LASTLS1

iTrader: (7)

Yes, that's what kills us.

crashly

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

RonSSNova

iTrader: (3)

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