Too Early?

Did you ever figure out if the ZF was stock or there had been a modification to it?

Thanks for the U-tubes.

It just struck me how similar the C and the 7 sound at idle.

Hi 'Doug,

The only reference I found to the gearing was in a letter I found in the paperwork from Dennis Quella of Pantera Performance covering the required modifications to achieve a top speed of 200+ mph.
In the letter he mentions going to a 3.73 gearing in order to achieve 200+, in combination with the horsepower calculations.
The receipts for the ZF work didn't detail the gear ratio that was finally used.
I wonder if Pantera Performance still has records of the build and would be willing to share them with me? That would be cool.

Jeff

I remember Dennis talking about the 427 cars that he built. I wanna say he built three, but this was 20 years ago when 427's were kinda cheap.

I'll bet that he remembers each one of them and why don't you give him a call?

If Dennis doesn't remember just wait till spring to take it for a run and record what speed it is doing in various gears at set rpms then use the ZF gear calculator to see where you are.

Julian

I also read somewhere I could pull an access plate and get a tooth count on the ring gear?

Which plate?

Bottom plate but you'll have to pull the unit from the car because of the long cross bolts which won't clear the frame rails

The last time I checked there were only three gear sets available.
1)stock 4.22 2)3.73 3)5.38

I think the 6 speed uses the 4.22 but it has a 3 something 1st gear and a bigger overdrive in 6th.

That's the way to go if you are serious about going 200 but frankly I think that there aren't a lot of tracks that are long enough for you to hit 200.

You are thinking about a track right? You wouldn't be thinking about going 200 on the street would you...would you?

quote:

Originally posted by PanteraDoug:
You are thinking about a track right? You wouldn't be thinking about going 200 on the street would you...would you?

Well, it wouldn't be the dumbest idea I've had in life...... maybe in the top 5?
They close a section of road here in Idaho over by Sun Valley and HP sets up a "speed trap" for you to run through to check your top speed.
One of the guys on the last exotic car run was telling us about it.
His GT hit 189 through the trap last summer.
$500 for 3 runs if I remember right?
You do get a nice Idaho State Patrol official ticket recording your top run though.

Damn that sounds like fun.

quote:

Originally posted by 4NFORD:
Bottom plate but you'll have to pull the unit from the car because of the long cross bolts which won't clear the frame rails

Thanks Dennis,
I wounder if since my ZF sits further back I might be able to pull the plate in the car?
I'll have to crawl under it next time I'm in town.

If I was gonna move everything back to fit, I'd move it far enough to fit a cammer.

Put a square on the axle stubs and ZF for the heck of it. See how far off it is.

The joints will permit some misalignment but matched to the torque of the 7 they won't last too long?

Jeff, You got me going. We have had a few beaauutifuull sunny days flirting the freezing point and I have been tempted to take the car out. Well tody I came home for lunch and decided to start the car up, moved it out of the garage and give it a quick wax while it was warming-up. Yeahhhhh. That felt soo goood. Unfortunately had to put the car back, still worth every second of pleasure.

Denis

quote:

Originally posted by PanteraDoug:
If I was gonna move everything back to fit, I'd move it far enough to fit a cammer.

Put a square on the axle stubs and ZF for the heck of it. See how far off it is.

The joints will permit some misalignment but matched to the torque of the 7 they won't last too long?

At most, the ZF was shifted back 2", you can see it in the shaft angle barely.


I think the cammer adds close to 12" more to the front of the motor with the chain cases, so you'd be faced with either lengthening the wheelbase to align everything or devising a hub driven assembly simila to what an H1 Hummer has.
All in a very tight space.
Not saying it can't be done, but it's way beyond my capabilities or wallet.
Mostly wallet.

Reminds me of a question asked by a member of another board I'm on:

quote:

Is it the rare cammer motor to or just a 472 side oilier?

But.... but, I thought a tunnel port 427 sideoiler was rare?

The cammer is about 2" longer then the standard FE because of the cam covers.

As far as a Tunnel port being rare. Sure but since they were the last in the line of the performance developments for the FE, they were run quite late into NASCAR.

I certainly remember them in the '72 season. The rules were changed limiting engines to 5.7 instead of 7 liters and the 351C's replaced them.

The side oiler block was just the 427 service block since 67-8.

The tunnel port is a really neat engine and simpler to deal with then the HR, but a 427MR would do.

Any of them are 500hp out of the box and respond to performance modifications.

I see the angle on the axles. With camera angles and such things, it's hard to tell how far back the drivetrain was moved. I'd guess 2".

No matter to any of this. Yours is a very cool car.

The Cleveland and the 427 both basically have the same red line 7,000. In fact the 427 has to be more strictly restricted then the C does.

A solid lifter C is at least a 7,200 rpm engine.

The 7 is not without modifying the bottom end for reliability at high rpm.

I know Ron is going to disagree because he raced them but the overwhelming feeling is that #7 & 8 will have oiling problems at high rpm unless modified.

The big buck guys now run that set up with Chevy titanium connecting rods with 2.1" rod journels. All of a sudden the thing is an 8,500 rpm engine that way.

The cammer most likely would have bulkhead problems in the Pantera and I don't know if that is fixable at all.

I stand corrected on the cammer dimension, can't believe all you read on the internet.

Prevous owner stated in paperwork the the 427 block used was a '66 stock bore, hinted at it being from Lola racing, no documents to prove that though.
I realy should document the numbers on the block to know what year it is.

I was going to measure/document the drivetrane shift compared to a local stock Pantera, but he has his trunk tub in everytime we meet up.
The brackets used to relocat the ZF support look like they are allowing a 2"-2.5" shift to the rear of the car.