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02-24-2015, 04:21 PM | #1 |
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3:27 or 3:54 ??
I am buying a 1928 Tudor Sedan, soon.
I plan on putting a high compression police head on it (B on the head). I have the option of adding either a 3:27 R&P or a 3:54 R&P. In an earlier thread I asked if the police head would be enough to propell the 3:27 R&P in a light weight pickup truck. The concenses seemed to be yes. As you know a Tudor is a heavier body. Would it be better to use a 3:54 in the Tudor or would the police head be enough to propell the 3:27? Also, most parts houses sell a speedometer gear for the 3:54. No one seems to have the correct speedometer gear for the 3:27. As a default, some recommend the same speedometer gear as for the 3:54, which probably means that the speedometer would be off a little. Can anyone comfirm this? Thank you, Neil |
02-24-2015, 04:49 PM | #2 |
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Re: 3:27 or 3:54 ??
Bert's has the correct speedometer adaptor for the 3.27 ring and pinion, and that's the gears I'd like to put in my 29 Tudor.
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02-24-2015, 05:00 PM | #3 |
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Re: 3:27 or 3:54 ??
I am seriously considering putting a set of 16" wheels on my A with 195 - 80 tyres. That means they will be smaller than the originals but to compensate, I'm also considering changing to a 3.54 diff. Any comments/recommendations?
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02-24-2015, 05:02 PM | #4 | |
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Re: 3:27 or 3:54 ??
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02-24-2015, 05:03 PM | #5 |
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Re: 3:27 or 3:54 ??
Based on my experiences installing several 3.27 ratios, it is not the head that makes or breaks the deal. It is the cam. I have installed one 3.27 ratio with a stock head (milled only to true it up) and an IB330 cam and it did fine in a '30 Coupe albeit not as agile as one with better breathing and more compression. I have also installed a 3.27 in a '29 Roadster that had a rebuilt engine with a Brumfield head and a 'touring' cam. It was a 'slug' IMHO.
Those two cars and their drive train were not totally comparing apples-to-apples, but it has allowed me to form an opinion that camshafts create better driveabilty than what a hi-compression head does. Note I did not say more horsepower, just better driveability. |
02-24-2015, 05:15 PM | #6 |
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Re: 3:27 or 3:54 ??
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02-24-2015, 05:18 PM | #7 | |
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Re: 3:27 or 3:54 ??
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02-24-2015, 06:27 PM | #8 |
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Re: 3:27 or 3:54 ??
I have 16's on my pickup, but never go fast enough to make any difference on the speedometer--lol
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02-24-2015, 07:00 PM | #9 |
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Re: 3:27 or 3:54 ??
I would think terrain comes into play here.
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02-24-2015, 07:15 PM | #10 |
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Re: 3:27 or 3:54 ??
Brent- What is an IB330 cam?
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02-24-2015, 07:21 PM | #11 |
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Re: 3:27 or 3:54 ??
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02-24-2015, 07:47 PM | #12 |
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Re: 3:27 or 3:54 ??
To a certain extent it does, but I live in the mountains of Tennessee, so our terrain is a good representative of how these gears will perform in the mountains.
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02-24-2015, 07:56 PM | #13 |
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Re: 3:27 or 3:54 ??
"What is an IB330 cam?"
it is a thing of beauty. we have installed several of them, including my own car. really wakes the motor up. Stock motor breathes very poorly, and labors going thru the gears. With the IB330 the car just wants to go with hardly any throttle; you can hear and feel that it is not laboring. It is a takeoff on what Ford did for the Model B engine, only better still
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02-25-2015, 07:49 AM | #14 | |
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Re: 3:27 or 3:54 ??
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02-25-2015, 12:13 PM | #15 |
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Re: 3:27 or 3:54 ??
Jim Brierley has masters that he has regrinds done from. He just posted some of his specs on a couple cams. We have installed a couple of his cams and they are very nice also!
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02-26-2015, 04:02 PM | #16 |
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Re: 3:27 or 3:54 ??
I would think it depends on terrain as indicated above as well as if you are planning on doing any "Parade Crawls".. You'll wear out your knee constantly taking it in and out of gear in a long parade.. Touring on the flats would be a hoot though
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02-26-2015, 04:11 PM | #17 |
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Re: 3:27 or 3:54 ??
I've been running 3:54's in my 31 S/W Town Sedan with a stock B motor (soon to be built up for touring). We have put thousands of miles on it and it's good for flat roads but not for long hills with the current power situation. Once the new head and downdraft are on, I'm sure it will be much better on the hills. The Tudor is a little lighter than our S/W Town Sedan which should help.
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