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09-04-2019, 02:37 PM | #41 |
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Re: STREET MACHInES, Engines, gearing and etc
My "280" engine was a 276. L-100 engine I was going to supercharge. Unfortunately ny Partner died ansd I had to leave the shop and build one of my own. The truck went into vegetation, I opened the hood and found no spsrk plugs were in the engine. So it came apart. I bout a set of .020" over 3 5/16 pistons from Egge (145 over), put in an EAB cam milled a set of EAB heads for /045" piston to head clearance. Bored out a Merc intake for a 2GC carb installed a converted SBC dist. WE put in the RTS trans a 44A dana real with 3.73 gears and went after the Weston/ Andover hill a 14% grade. Bet my friend George it could make it in OD at 50 mph, starting at 50 mph.
I lost, went over the top at 43, engine was turning 1300 RPMs. The thing is a torque monster. Might put the 3.30 back in. |
09-04-2019, 02:51 PM | #42 | |
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Re: STREET MACHInES, Engines, gearing and etc
[QUOTE=David Lien;1795475]
Quote:
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09-04-2019, 04:38 PM | #43 |
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Re: STREET MACHInES, Engines, gearing and etc
Much of this transmission talk, has been, based on competition gearing and I believe that by far, the membership of this forum are restorers and cruiser's so, most any of the T-5's would be usable transmissions and better, overall, than the '39 box. Even ones with the 3.5, 3.76 and 4.03, first gear. The RTS has a place here, too. In all cases, the gearing is better that the standard early Ford gearing.
For example, one of the T-5, 3.76 first gear trans, has almost identical ratio's as the 25 tooth Zephyr OD transmission, with a extra 3.76 first gear. Meaning you can run a higher final drive ratio. What be could be wrong with that? There are times when you may want that low first gear, such as a parade. For actual racers (very, very few) the way that you gear the car, is to gear for the top speed that you can attain at the track you run and then, select the closest gear set that you can find, that has a progressively smaller rpm splits as you increase speed. The engine has to work harder as speed increases, mostly because of aerodynamic forces. i.e. It basically takes 4 times the HP, to double your speed, all other thing equal. I both drag raced and road raced. In road racing, first gear (5 speed trans), isn't to important, as it's purpose is to get you started w/o stalling and at all the tracks that I ran, you didn't get much under 60 mph, second gear covered that. There was a exception, in Formula Ford, you could only use 4 speed trans so, it was geared so that 1st gear was usable (all gears can be changed) but, they had a hard time getting to speed and had to slip the clutch but, we had rolling starts so, it was just out of the pits and when you sat on the grid, that it mattered. A racer doesn't care about gas mileage, he wants to burn as much as he can, in the time allotted. A cruiser wants a easy to drive car. Starts off easy, runs quite and has as good a gas mileage, as possible. A street race to a cruiser last a few seconds and usually ends by 60 mph. Here is a very extensive list of gear sets for different cars that had the T-5. Frank Last edited by frnkeore; 09-04-2019 at 06:35 PM. |
09-04-2019, 04:49 PM | #44 |
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Re: STREET MACHInES, Engines, gearing and etc
Long range, we run a 265 cuin 99a engine in our 33, stock 33 cam,stock 33 manifold and 97 carb, stock 3 speed trans,(48 gearset) stock 33 rear end 3.78.
this tows our caravan all day at 50-55 mph, Its a really nice engine, could do with a bigger carb for sure but its very nice like it is. Lawrie |
09-04-2019, 06:07 PM | #45 |
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Re: STREET MACHInES, Engines, gearing and etc
Just like any vehicle, you want it to drive like a truck, use truck gears, you want it to drive like a car, use car gearing, you want it to drive like a high performance car, use high performance gearing. A weak engine is another reason for wide ratio gearing.
Racing is a whole different world. Last edited by JSeery; 09-04-2019 at 09:33 PM. |
09-04-2019, 07:02 PM | #46 |
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Re: STREET MACHInES, Engines, gearing and etc
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Yup, and my '65 Corvette coupe with eleven options was only $5,500 back in the '60s, too. DD |
09-04-2019, 09:11 PM | #47 | |
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Re: STREET MACHInES, Engines, gearing and etc
Quote:
You have to respect this. It's quite great! |
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09-04-2019, 11:18 PM | #48 |
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Re: STREET MACHInES, Engines, gearing and etc
Pete, we need a grind like the EAB/EAC with alittle more lift. I use the rotators on the sterrt engines that use up to .350 lift and only 45/50 lbs of spring pressure. so I don't think i have to worry about the cam. The big prise here is the torque and fuel mileage.
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09-04-2019, 11:57 PM | #49 |
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Re: STREET MACHInES, Engines, gearing and etc
Indeed it is. You really have to understand how remote the areas Lawrie travels too as well.
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09-05-2019, 09:31 AM | #50 | |
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Re: STREET MACHInES, Engines, gearing and etc
... or if you need to pull some stumps out ;-))
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09-05-2019, 09:39 AM | #51 |
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Re: STREET MACHInES, Engines, gearing and etc
Let's not forget, we're talking "street vehicles" here. I do have a T-5 in the roadster..
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09-05-2019, 09:53 AM | #52 |
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Re: STREET MACHInES, Engines, gearing and etc
The stock Ford gears should give a good hint as to the best 1st gear. Depending on the transmission they were:
Ford 1st gear ratios were: 2.820, 3.114 & 3.520 Zephyr 1st gear ratios were: 2.820, 2.330 & 2.120 The 2.95 & 3.35 T5 gears are a fairly good fit, with the 2.95 being the better of the two. There is really no reason to bring racing issues into a street gear selection discussion. With racing there are just be many variables and specific applications to have much relevance on street driving. Math is math and physics is physics, but the application/environment is very different. Last edited by JSeery; 09-05-2019 at 10:05 AM. |
09-05-2019, 12:48 PM | #53 |
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Re: STREET MACHInES, Engines, gearing and etc
My point was/is, that all of the T-5's (including the 4.03 first) are at least as good or better than the standard '39 (85 HP), gearing of 2.82, 1.604 and direct. The top 4 gears of the 4.03 trans are, 2.37, 1.5, direct and .82 OD. They are similar to the 26 tooth Zephyr of 2.33, 1.577 & direct, with a OD bonus.
Frank |
09-05-2019, 01:31 PM | #54 |
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Re: STREET MACHInES, Engines, gearing and etc
Guess we just have to disagree.
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09-05-2019, 01:45 PM | #55 |
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Re: STREET MACHInES, Engines, gearing and etc
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09-05-2019, 04:40 PM | #56 |
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Re: STREET MACHInES, Engines, gearing and etc
I don't call it a disagreement, just a difference of opinions. Allot of good information here, learn sumpin every day, Till they throw dirt un ya.
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09-05-2019, 06:52 PM | #57 |
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Re: STREET MACHInES, Engines, gearing and etc
I’ve learned a lot from this thread and this “ learn sumpin every day, Till they throw dirt un ya.“.....is now my philosophy on life!!!!....LOL.....Thanks, guys.....Mark
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09-05-2019, 07:00 PM | #58 |
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Re: STREET MACHInES, Engines, gearing and etc
Funny, I remember something that Pete said a while back. With a hot flatland, LZ gears may help a guy not break as much stuff for the take off torque isn’t as high as a 28 or 29 tooth gear set. I may have to go this route with 296 ci and a tad over 200 hp
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09-05-2019, 08:52 PM | #59 | |
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Re: STREET MACHInES, Engines, gearing and etc
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Oh boy there goes the fuel economy LOL
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09-05-2019, 09:01 PM | #60 |
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Re: STREET MACHInES, Engines, gearing and etc
Haha. Yeah and I have you to blame!
Well, I have a 1 mile commute to work. Between a full house flat head, straight exhaust headers made out of '36 Ford drive shafts and a light, AV8 roadster powered by a 296 ci flatty put together by one of the best out there, I think I'll be able to wake up the kids for school as I drive by. Last edited by Tim Ayers; 09-06-2019 at 05:45 AM. |
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