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Old 05-05-2018, 06:43 AM   #136
Maniacmechanic1
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Quote:
Originally Posted by 1963SS View Post
Hey Brian, That's true.I have a 9 1/2" Vigilante converter and it has CNC'd billet anti-balooning plates. It is a 3600 stall give or take. My line pressure is 240 PSI and I've never had a tranny problem and it will put on a heck of a smoke show. I also have 9 clutches and kolene steels. The tranny build sheet says it has .030" clearance on the pack. The shifts are firm.......maybe a bit too much for street and strip. I took out a u-joint or two until I switched to the Spicer NON-greasable joint. They are just about perfect and can take a heck of a shock load. I guess that since they are not drilled out for greasing that there is more metal and less chance for breakage.

I don't think that 400 PSI is an option. That seems like a lot.
If your sticking with the 4L60E Trans Wiz listen to Gunny here.
Get the same Vigalante converter.

Yes 400 psi Gunny..
Why do you think all those C4 700R4s failed with blown up front oil pump rotors ?
Cranking up the line pressure.
Pete even blew up hisif you recall.
The 700R4 expert. Was.

Gunny builds his own transmissions too Wiz.
Only way to know what you have.

Race pro bought TH400 IS OK.
DITTO FOR 4L80E.
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Old 05-05-2018, 08:24 PM   #137
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We are setting up this power plant and once the trans or diff fail we are going to urge our customer to a level VI or better kit from RPM with a 4l80e and a c6 diff(I think) and we will swap the rear sub frame to a c6 as well. But he has to blow up the stuff he has first. That is all we can do. As each piece fails from racing, build it back as strong as we can.
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Old 05-05-2018, 08:29 PM   #138
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The owner of this car has been trying to get me to go to the track with him for a long time, now. And he has brought us so much work and said such good things about me and our cars are so close that when this is all together and broken in, I will have to follow him up to Palm Beach Int'l Raceway in my 2000 and we will pit c5 LSX376-B8 vs. c5 LSX376-b15 with a power adder. My money is on the car WITH the power adder but you all know I will try as hard as I can to actually get that gas pedal on the other side of the floorpan. And then I will post video(s).
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Old 05-05-2018, 08:35 PM   #139
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This is the second Corvette that this awesome person, Kevin has had vetteXperts build for him. This is his '81:

https://www.digitalcorvettes.com/foru...d.php?t=255809
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Old 05-06-2018, 02:54 AM   #140
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Quote:
Originally Posted by autowiz View Post
We are setting up this power plant and once the trans or diff fail we are going to urge our customer to a level VI or better kit from RPM with a 4l80e and a c6 diff(I think) and we will swap the rear sub frame to a c6 as well. But he has to blow up the stuff he has first. That is all we can do. As each piece fails from racing, build it back as strong as we can.
I want to see you have success not failure Wiz.
You do not get into building engines from a bare block like I have and Gunny.
With Hardcore gone, He is not coming back to DC I tried.
I am the only one that has Built Race Engine LS Engines from a Bare Block. Then on the Chassis rollers. Tuned . Full Flogged to 180-200 mph Rear wheels speeds in 4th high gear pulled to 7,000+ Rpms.
Then Sunday Raced at Route 66 or Indiana US 30 Track.
My Shit Held Together & did not Blow up.

The Rear C5 Diff is not the problem I am concerned about.
Nor the 4L60E.
I know both are going to fail catastrophic.
KABOOM.
Its the 2,000-2,500 stall torque converter will BALLOON EXPAND THE MAIN STEEL SHELL ITSELF.
WITH FLYWHEEL HORSEPOWER AND TORQUE NUMBERS AT 500-550 HP & ABOVE IT HAPPENS.
IT HAPPENS WITH 700R4, 4L60E, TH350, TH400, MOPAR 727 TORQUEFLITE, FOR C4 & C6, GM POWERGLIDE .

The Ballooned converter shell expands.
The Torque Tube Corvettes are locked down solid to the engine flywheel flexpate & to the torque conveter drive plate.
Splined on both ends the you tighten down the swage lock bolts on both ends.
Rubber or poly biscuits the torque tube ball bearings are supported on internal.
Opposite reaction pushes through the torque tube driveshaft .
Right to the LS Flexplate.
Right to the the LS Crankshaft.
Right to the LS Crankshaft Thrust Bearing.

ITS SEVERAL THOUSANDS POUNDS OF FORCE BEING TRANSMITTED BACK.

A BIG BLOCK CHEVY CRANKSHAFT THRUST BEARING CAN ONLY TAKE 200-300LBS OF CONSTANT FORCE BEING APPLIED BEFORE IT FAILS.
100 LBS FOR A LONG LIFE.

PONTIAC 455 HAS 3-1/4" MAINS SO THRUST BEARING IS VERY LARGE. TAKE ABOUT 500 LBS OF FORCE BEFORE IT BURNS UP.

LS ENGINES HAVE SMALL MAINS AND THRUST BEARINGS.
THERE IS NO WIGGLE ROOM.
TAKE 150-200LBS CRANKSHAFT THRUST FORCE ONLY BEFORE IT BURNS UP AND DESTROYED.
THE CRANKSHAFT THEN STRIKES THE MAIN WEBS OF THE BLOCK & #3 MAIN BEARING CAP.
HOLY FUCK ALL IS DESTROYED IN SECONDS.
NEW ENGINE.
JUST REUSE THE HEADS AGAIN.
LS3 HEADS.
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Old 05-06-2018, 03:03 AM   #141
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Quote:
Originally Posted by autowiz View Post
We are setting up this power plant and once the trans or diff fail we are going to urge our customer to a level VI or better kit from RPM with a 4l80e and a c6 diff(I think) and we will swap the rear sub frame to a c6 as well. But he has to blow up the stuff he has first. That is all we can do. As each piece fails from racing, build it back as strong as we can.
THERE IS NO 2 ND CHANCE HERE.
You Must have a Vigalangte Precision Torque converter in the Customers car.
Without the crank thrust bearing will be destroyed in the New LS376 B15.
All Your work dressing the longblock & Tuning efforts wasted.

Seen it happen dozens of times local too.
Guys were dumbasses.
Did not listen to Wiser Older Racers.

I avoided the problem in my 1970-1/2 Trans Am because its a Muncie 4-speed car.
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Old 05-06-2018, 03:05 AM   #142
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COAN Torque converters & Hughes are very Good Also.

Coan deals with only Turbo 400, Powerglide, & 4L80E.
10-second to 5 second 1/4 mile Race cars.
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Old 05-06-2018, 03:23 AM   #143
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The Rocket science info is buried deep on Grumpys site.
See if I can find.
Takes a Photographic memory like I have or Grumpy to find.
Has so much data there.
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Old 05-06-2018, 03:41 AM   #144
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http://www.4secondsflat.com/Thrust_b..._failures.html

http://garage.grumpysperformance.com...41/#post-71921

There is another article written by Clevite Bearings.
Looking yet.
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Old 05-06-2018, 03:44 AM   #145
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Chose the Moroso Race Trans Cooler & & #6AN Lines with the Turbo 400 in my 63 Pontiac GP for a reason.
Ultra Low Flow restriction.
Shit was not inexpensive. $500+ I spent.
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Old 05-06-2018, 03:54 AM   #146
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http://garage.grumpysperformance.com...619/#post-1813


Its a Real Long one By Grumpy.
Lots of Good info.
I actually read through his site in the past.
So did one other Guy, TURBO PHIL.
He is a Street Race Drag Race Nut too.
It took us each 3 months nonstop reading day & night.
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Old 05-06-2018, 04:03 AM   #147
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Old 05-06-2018, 04:19 AM   #148
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In other News I think I am going back to working in Crazy Ed's Garage.
Race car fabrication work together.

He went just about Blind Recent.
Heli Arc TIG Welding too much.
He has the right protective Gear.
He May Kill The MILLER PEOPLE.
His $500 welding helmet is a Piece of Mother Fucking Shit.
Fried his eyes with not ultra violet light or UV but Inferred Radiation.

He is going to wear his LINCOLN Welding Helmet.
Darker.
And wear Yellow Shooter style glasses to block the IR Light waves.
He built a sheet metal Tunnel Ram Intake for a SBC.
Really Kool.
Hogans style the $10,000 Intake.
40 Hours welding into it he says.

Looking for a shop to Rent in Joliet.
Want to work on my own.
My Own show.
Work on semi truck diesels to get the $$$$.
Pays the best.
$100-200K per year or more.

Race cars my 1st Love.
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Old 05-06-2018, 05:14 AM   #149
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Quote:
Originally Posted by autowiz View Post
The owner of this car has been trying to get me to go to the track with him for a long time, now. And he has brought us so much work and said such good things about me and our cars are so close that when this is all together and broken in, I will have to follow him up to Palm Beach Int'l Raceway in my 2000 and we will pit c5 LSX376-B8 vs. c5 LSX376-b15 with a power adder. My money is on the car WITH the power adder but you all know I will try as hard as I can to actually get that gas pedal on the other side of the floorpan. And then I will post video(s).
My $50 Bucks is on You Right Now Wiz.
You do not have enough HP & Torque to break anything.

To Win 1/8 mile or 1/4 mile drag racing or Street Racing at night you have to finish the race cross the finish line with breaking down.

You customer....If his B15 Blows from a lost crank thrust bearing it will be Holy Mother Fuck Situation for You.

And it will without a Vigilante Precision Converter Like Gunny has in his SS Impala.

Turbo 400 swap solves all.
I just got back from driving my 63 Pontiac with its Turbo 400.
Ran down to the gas station down the highway at 90 mph.
Hit 120 mph for Fun on the way back.
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Old 05-06-2018, 07:18 AM   #150
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What is going to fail very likely In the Jasper Remaned Daily driver 4L60E C5 Trans will be the 3-4 clutch & 2-4 Band Autowiz.
They do not set them up with high line pressure and use the stock 1-2, 3-4 accumaltors & baby soft spring for Granny silky smooth shifts.
Which is Ok for whats going on with this C5 LSX 376 B15 Build of yours at work.
The Front Oil Pump will not Blow Up and send huge shrapnel throughout the torque converter......
The New Vigilante precision torque converter I am recommending along with Gunny.
Look for a 3500-4000 rpm stall.
It will actually hit less hard on launch.
Accumulators do not have super stiff springs or are blocked with 1/8" stainless steel set screws for full line pressure WOT Hard hit lighting fast shifts.

The low rpm stall now will likely break the Low-Reverse sprag Roller clutch in back of the case.
Known to happen in LT-1 & LS1 Powered 4th Gen Firebirds Trans Ams & Camaro Z28.
They are solid axle cars of course & guys often use drag slicks on them so they can hookup faster for 1.7-1.5 60 foot times at the track.
What I broke in my 1994 GMC Suburban the Low Revese Roller clutch. Dead car or truck then.
Borg Warner sprags & Roller clutch the best.

He will be able to resell the Vigilante torque converter later.
Your Ass is covered.
No Lost Brand New LS 376 B15 Main Thrust Bearing.

$900+ sales pitch you have to do.
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