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Guys I'm a crazy adapting manual to a Rolls Engine |
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darkostoj 
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Joined: Jul/03/2018 Location: Detroit, MI Status: Offline Points: 4 |
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 Topic: Guys I'm a crazy adapting manual to a Rolls EnginePosted: Jul/03/2018 at 6:22pm |
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So, I'm building a race car for the 24 hours of lemons race series. https://24hoursoflemons.com/ I thought a mid 70's Rolls Royce silver shadow would fit the bill perfectly. So, this car uses a GM transmission with a AMC V8 Bolt pattern. I am trying to figure out the best way to adapt a manual transmission that could live being tortured in an hardcore endurance track race. The engine is incredible, heavy duty forged pushrod v8 gear driven with aluminum heads and I'll adapt a Holley to it. Best case scenario would be a T56, but I'm open to anything really. I Know of one other car that did it successfully using a T-18 Transmission so I know its possible.  Edited by darkostoj - Jul/03/2018 at 6:59pm |
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tufcj
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Supporter of TheAMCForum Joined: Jul/10/2007 Location: Watkins, CO Status: Offline Points: 4088 |
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Posted: Jul/03/2018 at 6:45pm |
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If you use a 76-86 Jeep CJ bellhousing (about 6 1/2" deep), there are a lot of Ford transmissions that will bolt up. Think Ford 2WD truck. T-18, NP435 if you don't mind a granny low, T-176 with a syncro 1st. You could also use a world class T-5 for OD, or a T-10. Lots of early AMC cars had T-10s, but they use an 8" deep bellhousing. As long as you get the trans and bellhousing, it would bolt up. This is assuming you can find a flywheel and pilot bushing and fabricate a clutch linkage. Bob tufcj
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69 AMX
74 Javelin AMX 67 Rogue If you need a tool and don't buy it... you'll eventually pay for it... and not have it. Henry Ford |
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darkostoj
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Posted: Jul/03/2018 at 6:56pm |
I used to have a CJ-7, so I am familiar with those types of transmissions. Was looking for something more close ratio that would work well on a racetrack that is heavy duty since it will be beaten very hard. I was hoping to somehow adapt a hydraulic throwout bearing to the AMC bell. Is that possible?
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jpnjim
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Joined: Nov/25/2007 Location: New England Status: Offline Points: 2752 |
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Posted: Jul/03/2018 at 7:55pm |
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Roll Royce has V8's with AMC bellhousing patterns???! wow that's a mind blower! There was a subject here about adapting a Supra 5 speed which is very similar to the AX-15 used in late 80's to mid 90's Jeeps. Not crazy heavy duty, or very close ration, but probably the best balance of the two you'll find on a lemons budget
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71 P-code 4spd Javelin/AMX
some Jeeps and some Fords |
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jpnjim
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Joined: Nov/25/2007 Location: New England Status: Offline Points: 2752 |
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Posted: Jul/03/2018 at 7:58pm |
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Found the thread: good luck! post some engine pics when you can please, I'd really like to see what this engine looks like
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71 P-code 4spd Javelin/AMX
some Jeeps and some Fords |
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tyrodtom
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Joined: Sep/14/2007 Location: Virginia Status: Offline Points: 6213 |
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Posted: Jul/03/2018 at 8:11pm |
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Not just the heads are aluminum, but the block too.
And the doors, hood and trunk. 4 wheel disk brakes, 4 wheel independent suspension, two calipers on the front, quite advanced for it's time. I been restoring a 69, off and on, for about 9 months . I'm probably too late, if you don't trash the trim I know where you can sell it. Those doors, once you get the window motors, latch and window frame out, only weigh about 20 lbs each. About nothing is easy , when you're working on a Rolls though. You're starting out with a better car than I did. Mine was crushed by a snow loaded roof. I've replaced roof and R.F. fender. The steel body has a lot of lead in it to give it the one piece look, and crisp lines. Maybe 50 pounds of lead in it from the molded front fender, and rear roof joint. I've got the car completely stripped, but still on the chassis. Maybe we could sneak/ swap mine out and replace it with yours, and the boss would never notice. If you want some advice on non-destructive disassembly, I totally took this 69 down, and I've got all the manuals, about 8 or 9, thick books.
Edited by tyrodtom - Jul/03/2018 at 8:32pm |
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66 American SW, 66 American 2dr, 82 J10, 70 Hornet, Pound, Va.
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darkostoj
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Posted: Jul/03/2018 at 8:13pm |
 So the engines are all forged aluminum 410ci small blocks. Pretty sure camshafts are gear driven with a single cam/pushrods and dual SU carbs. The camshaft has two lifters on the back which pressurize the brake & suspension system at the same time. These always fail and will have to be converted to a conventional brake setup. I will adapt a holley carb, I think a 2nd gen camaro subframe will bolt up and I will use that stock suspension on the front. Rear I will have to come up with something, not sure yet.
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tyrodtom
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Posted: Jul/03/2018 at 9:58pm |
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If your's has the manual starter solenoid under the hood, be very careful. It will start the engine even if the transmission is in gear.
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66 American SW, 66 American 2dr, 82 J10, 70 Hornet, Pound, Va.
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farna
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Moderator Lost Dealership Project Joined: Jul/08/2007 Location: South Carolina Status: Offline Points: 19676 |
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Posted: Jul/09/2018 at 5:47am |
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With a V-8 T-10 bell housing you could use an old T-85 or T-89 three speed (T-89 is the strongest, and what I'd look for, from a 327)). You won't be doing any down-shifting into first -- or shouldn't, especially with one of those! No synchro to first, but a strong one between 2nd and 3rd. You'd just be doing a lot of shuffling between 2nd and 3rd...
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Frank Swygert
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tyrodtom
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Posted: Jul/09/2018 at 7:02am |
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Why not a T-15 ?
If they're racing on road courses, some have some low speed turns where a usable 1st might be nice. Depends on what particular tracks they're racing at. But a strong 5 speed is what's needed. It's been decades since I've been on a road racing course, but the more gears you have the better. Keeping any engine close to between it's torque and HP peak is where it's fastest.
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66 American SW, 66 American 2dr, 82 J10, 70 Hornet, Pound, Va.
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tufcj wrote: