572 wedge 63 Dodge rear gear ratio?

Me too after thinking about this.
the reason I can't say I saw the RPM at the end of the run is I cut the Tach wire from the msd box going to the tach chasing an electric issue. the tach needle was bouncing all over the place down track and I couldn't tell what peak was anyway.
Once I did that and at the same time between round one and 2 also discovered the power wires to about all the toggle switches for ignition, fuel and h2o pump and fan were loose. after tightening them tiny screws down the car ran good. I'm looking for a good brand / source for on off switches. the last ones were on a Moroso panel.
I did have the maga 200 on the RPM screen but I didn't get a good look at the peak at the end of the pass.
The peak RPM stored "has" to be the top end of the pass. {boy its been too long..}
I have a 6000 {or close} in the 3 step to the line lock, the burn out can't go past that.
tomorrow when I go to the shop and before I pull the trans I'll figure out how to recall the pass if doable. It should be, it saves the peak RPM if the power is off then back on.
pretty excited to think I may get this car squared away this time around.
BTW I am running 32 inch tall stiff sidewall tires. so the 4.56's may be OK?
Thanks for steering me in the right direction.
This might be great fun getting that car in the 5.90's in the 1/8

A 456 is a good gear get you a converter that will lock up and you can put the power down a 9' or 10 inch in the power and weight of your car and gear and tire size not one out of the box and you will see a big change .

I was pretty sure the 32 tall tires and the 4.56 gear was a good combo to use for both 1/4 and 1/8 worked well years ago with my 69 Coronet but only a 440 engine 7.10 ET in the 1/8.
After looking back that converter was built by Continental several years ago.
I did have an issue toward the end of last season with the trans shifting from 1 - 2 real fast. {have the air shifter shifting the car by RPM}
{I need to get in the habit of making more complete notes in the log book}
I Adjusted the front band and changed the fluid seemed to fix the problem. This may still be and issue, now more than ever do I need to see if I can recall the run. could be the direct clutch pack is going away.
I'll know more today.

If it is the transmission slipping that bad I would think the fluid would be burnt. Is the converter an 8"? Continental builds a good converter, you just need one tailored to that torque monster you have in front of it.

The converter is off to Continental
and the Transmission to Clay's Transmission in Sandy.
The fluid wasn't burnt last fall during the time I adjusted the front band, Not the case now! fluid smelt awful this time. Clay thinks forward clutches are the culprit. Now is the time to flush the cooler and lines.
It took less than an hour to remove the trans from the 63! not to bad for a couple fat guys.

Good deal, bet your in for a surprise when you get that straightened out.

For what its worth, my friend had the same problem with is turbo 400 and continental converter. in his 55 chevy.
the took the converter apart and found the problem. I think it was a broken sprag.

I'm hoping things will get straightened out this time around. Since I've never driven a car with this combo I haven't had anything to compare too.
I've always felt the 572 should be giving more.
Thanks for the input all much needed.

Absolutely I will post the results! {for better or worse}
If all comes together we will be running the car on the weekend of the 14th of this month in Madras.

good luck with your build, having another 572 breathing will be great fun!
An ol' time racer came up to me last weekend and commented on my car by saying how "Obnoxious" it was, He had a big grin of his face when he walked away. That alone made it a good day.

Rodney,

My car is close to yours in seniority and in power, pushing 575 HP. I run a Dana 60 with 4:89 pro gear, 9" convertor, crossing the line at 7700 at 144 MPH and 9.18 ET... OK I meant used to run that, once upon a time. Let's don't forget your at an altitude where engines and people don't function as well. Bring the big Dodge down here to Woodbine and I'll buy you a corndog.

Got an update from the transmission shop this afternoon to find that it was indeed the direct clutch pack that was fried. Everything else looked great, he is going to use a different kind of band and clutches and change the ratio of the band lever. Other than that just clean and reassemble the thing. It's nice to get a piece of good news once in a while.

'63 Plymouth, 523" around 750 hp. weighs close to 3200 with me in it. I am running 4:10 gears, letting the engines torque take care of the launch, I was wanting the car to MPH, and to hold down the finish line RPM's. I am happy with it. 6:20's, 110 in the 1/8th, thats at sea level here in Coos Bay. Been 9:80's at 140 in Medford. With your "new trans" and the proper convertor, your car will fly!!! You should have a totally different car performance wise, don't be afraid to try a set of 4:10's!

ive got a 4.30 gear and a 31 x 16.50 mickey et street 606 hemi pump gas, 9.60s at 142 mph. shift at 6800and traps at 7000, 2700rpm at 65 mph on the hiway!! ati blown fuel convertor [ cause i broke all the other brands ] we have a 64 plymouth with a indy 540 cuin 3400 lbs with a32x14tire went from a 488 gear to a 456 it picked up 2 tenths and 2mph we are going to try a 4.30 next should pick it up another 2 tenths and more mph for sure best time is a 9.46 at 141 !

Some pretty good info here!! I have 4.88s in mine and would like to try 4.30s...Good luck with your car,Rodney! Sounds like it will be very fast!

A 4.30 or even a 4.10 would be my choice for what you are doing. Your hp comes in very low I would bet? My main reason for being on the conservative side is all the torque you have and keeping the car hooked up on the launch. It will also keep the rpms down in the traps saving the life of the parts quite a bit. I run a 4.56 and a 33.6 tall tire going 150 mph, and cross at about 7300. A 4.30 would probably work as well as the 5.46 gears in my car.

Hey,Greg! Yupp..It comes in quick! I wonder how long the 4.10 Richmond street gears would live behind my tranny brake 512..I know 440Jim runs them but he footbrakes his car. My rear tires are 10.5 x31 M/Tws..After reading this,I remember that bad1970dust has 4.10s behind his 572"...Maybe that is something Rodney should think about? Great discussion here! Didn't mean to rob your thread,Rodney!!

Thanks good information!
Did you mention what your 60 foot times were?
When we had the car at Woodburn in 2008 the finish line RPM was over 7000 so I was short shifting which really didn't make a lot of difference. At that time we were considering a gear change but when the cylinders cracked due to over boring to 4.5 {the machinist didn't sonic test the block} we had an engine build to deal with. Possibility the converter / Trans was causing slippage? Once the car is back together and I get things organized the 1/4 mile track will be next.

Thanks! We do have some rather talented people here!! I sent for a Strange catalog a week ago..I think they have the 4.30 Pro gears on their website..You might want to check that out.

Peak power will be related to flow, cam, compression, stroke and should occur before the finish line. I run 14 x 32 tires and 60' at 1.32 My car could easily run a 5:13 gear due to the fat valve covers.

The transmission is finished and the builder did a little more adjusting to the line pressure.
He also drilled tapped and installed a plug on the case, in alignment with the pressure adjusting screw on the valve body. With this done I can hook up a pressure gauge to the hi side pressure with the transmission in gear check and adjust the line pressure to {crap can't remember?} good thing I wrote it down at the shop.
We also purchased the EGT plus two channel and rpm monitor from Comutech to aid in jetting the cars I'm tuning. I also got the RaceBase electronic log book and spent a few hours inputting the data from last year and this year. This is a good thing IMO, at a glance with all of the runs in front of me on one page can see that the MPH was going away = transmission going away for quite some time. $50.00 well spent

Thanks for the info and "good" advice!
the car, now in 3rd gear 1/8 mile right at 6000 rpm's
I can live with that.
The day was real poor for trying to tune or even race a car due to rain and cool wind. The car didn't come close to the 6.27 it ran a few weeks ago but everyone was having a drop in ET.
I think the 63 was worse running 6.50s and only seeing 106 mph. The launch seemed a lot harder from where I was sitting. but the 60' was 1.45's and some one said I looked like I was spinning after the launch. I walked the track between rounds and it was not sticky at all past the launch area.
It was surly one of those days, after the first time trial I discovered both relays to the cooling fan and water pump were fried. Luckily I had a couple in the trailer to take car of that.
I do need to find some for the 16 volt system.
The Lube Tube oil accumulator decided not to hold pressure, I discovered the electric valve/switch is not holding the oil in the tube once shut off. That was a new switch not too long ago. I am tempted to install a manual valve and install a cable to operate it from the driver's seat, unless anyone knows of a good electric switch to get?
I was launching the car first @ 4500 brake with the throttle enhancer at around 2500 as I was doing in the past, then changed the chip to 3800 on the trans brake. That really didn't seem to make any difference.
The converter flashes @ 5000.
shifting at 6700 rpm peak HP is 6700 to 6800.
Won a round then it really started to rain had to wait a couple hours then broke out in the 2nd round with a 6.547 on a 6.55
the Trans is fixed now I just need to figure out how to set the car up to get my 60' times back or it could have been more the weather than anything.
If we don't gt rained out tomorrow I'm going to give it another go.

Hi it's nice to here you are back running. I had a 9'J converter in my bird about 10 years ago with a 452 motor and it went 5,100 but me and Brad put it in his Duster with a 500 inch motor and it went 5,500 rpms on the brake. Did some one build the converter for you car? Maybe in two weeks i will see what my car will run good luck to you .

yes Continental converters reworked it for us.
good luck to you!
It will be a couple weeks before we have the car at the track, right now it's wet wet wet .
Probably just as well the car really needs some relays and this will give me a chance to fit the oil accumulator.