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If you have information to share about the 512BB - the second Berlinetta Boxer model, then please post it here.

I suggest to limit replies by a certain subject, such as engine, gearbox, exterior differences etc. Hopefully, through time, this will grow into a more encyclopedic knowledge database.

First off, a simple overview.


Onno



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Overview

The 512BB is a clear evolution of the 365 BB, in fact, it is for non-anoraks quite difficult to see the difference between two parked next to each other.

The major difference introduced for 1976, when the 512BB took over as Ferrari's flagship, was an enlarged engine that was designed to overcome some of the design flaws in the earlier incarnation. To improve reliability, the redline was dropped to 7,000 rpms. In order to compensate for a slight drop in power, a more torquey engine was desirable and for this reason the engine was enlarged to 4,976cc. The engine became a dry sump design to better cope with higher cornering speeds, particularly because new tyres were now available which were wider. Officially, power dropped from 380 to 360 cv, but two well tuned 365 and 512 engines should produce roughly the same power output of 344 bhp, the 512 managing it at a lower rev count.

Because of the higher torque, the gearing was changed to make for a more relaxed drive, and the clutch was changed to a two-plate design since the first incarnation could barely cope with the engine's power.

The name designation of the model changed, the 5 now referring to the engine displacement of 5 litres and 12 for the number of cylinders.

On the styling front, a small spoiler was introduced to help reduce lift at high speed, and NACA ducts were introduced to help with engine cooling. To the same end, more louvres were introduced on the engine lid.



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May I mention that I have touched a bit upon 512 BB in the other 365 BB thread, comparing the three BBs. It might be of an interest. w/ smiles Jimmy
 

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The 512BB is a clear evolution of the 365 BB, in fact, it is for non-anoraks quite difficult to see the difference between two parked next to each other.

The major difference introduced for 1976, when the 512BB took over as Ferrari's flagship, was an enlarged engine that was designed to overcome some of the design flaws in the earlier incarnation. To improve reliability, the redline was dropped to 7,000 rpms. In order to compensate for a slight drop in power, a more torquey engine was desirable and for this reason the engine was enlarged to 4,976cc. The engine became a dry sump design to better cope with higher cornering speeds, particularly because new tyres were now available which were wider. Officially, power dropped from 380 to 360 cv, but two well tuned 365 and 512 engines should produce roughly the same power output of 344 bhp, the 512 managing it at a lower rev count.

Because of the higher torque, the gearing was changed to make for a more relaxed drive, and the clutch was changed to a two-plate design since the first incarnation could barely cope with the engine's power.

The name designation of the model changed, the 5 now referring to the engine displacement of 5 litres and 12 for the number of cylinders.

On the styling front, a small spoiler was introduced to help reduce lift at high speed, and NACA ducts were introduced to help with engine cooling. To the same end, more louvres were introduced on the engine lid.
FYI, the NACA ducts assist in rear brake cooling, not engine cooling
 

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I took a pic Frank, its an 80 BB512 im currently doing an engine and gearbox on. The duct aims right at the exhaust and the BBi is identicle.
 

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Hi Onno,

Not sure how to discuss just the 512BB without comparing it to the other models so thats how ill go about it.

Starting at the front, the front bumper is BB512 specific in that it has a chin spoiler as an evolution from the clean 365 front bumper. The 365 suffered from lift at high speeds, the 512 bumper fixed that. Moving to the BBi, the bumper was changed again in that it has park lamps inset on the leading edge which meant the upper bumper edge was thicker than the carbed bumper which also meant a different grill in both height and width due to the different flash to pass lamps.

Clamshells are all the same with the exception of the DOT converted cars that sometimes had add-on lamps hogged into the bodywork - too bad.

Rads and fans are the same 365 and BB512, changed completely on the injected car with new fans, different rads and interior panelling around the rads.

Spare tire is BB512 specific, 365 and injected car have the same size as each other.

Some 365s have a pocket to house the washer fluid bag, some just have a bag.

Tool kit breif case on both carbed versions, pouch on injected cars with leather outer bag that matches cars interior color.

to be continued....family calls
 

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Front turn signal lamps come both clear or amber depending on market. Front flash to pass lights also come clear or amber, again market dependant. France has amber flash to pass lamps, not sure what other markets have them. The signal lamps interchange between all models.

Hood grills all look the same, anodized silver. Replacement hood grills from Ferrari are black. Ive only seen injected cars with black hood grills, late 84's and im not sure if thats a factory running change or the owners simply replaced them (I know of one that did and it was silver originally).

BB and BBi have the radio antenna in the windshield, unsure about the 365 as Ive seen a roof mounted antenna in early ferrari press shots but no production cars in the flesh like that.

Exterior mirrors, seen chrome manual mirror on one side on the 365, dual black manual vitalonis on the carbed cars and electric mirrors (and sometime one) on the injected cars. Same power mirror as found on the euro 328s.
 

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Roof lines are all the same BUT the rear cabin section behind the door is different on the 365 vs the 512's. The rear door gap and clamshell gap run parallel to each other on the 512's, the 365 lines taper away from each other dictating the thickness of the forward edge of the clamshell giving the appearance of a wheel well opening thats closer to the cabin on the 365. (I prefer the 512 clamshell forward edge, its more balanced) The cabins are steel (fiberglass floor and firewalls) with aluminum door skins on steel door shells, aluminum front and rear clamshell skins on steel tubular frames. The 512 has the added engine bay cooling duct in the lower cabin ahead of the rear wheel opening.

Rear clamshells are model specific, 365 has two versions with either no cooling louvers at all which is a very nice look, super clean but holds too much heat followed by an running change that adds a center row of louvers between the air box covers. The 365 rear lid (wheel lip) is also 4 inches narrower (if memory serves correctly) than the 512 lid which had larger rear tires and rims. The BB512 lid is also model specific because of the three rows of cooling louvers, the more substantial leading edge than the 365, the wider wheel wells, 4 tail lights rather than 6 on the 365 and finally the position of the air box covers over the carbs. The BBi's injected manifolds required a relocation of the airbox covers that now cover the plenums since the air boxes are now mounted on the rear inner fenders.
 

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365 has small slots (for cooling not air intake) in the air box covers. Airbox covers and rear spoiler on all models come satin black as standard but ferrari would paint them body color on request $$$. An owner needs documentation at shows to prove they came colored from new, if not, they are assumed incorrect.

I forgot, the inner fender seals (foam) are on the clamshells on the carbed cars, mounted on the inner fenders themselves on injected cars with a stainless steel strip and rubber lip. 84 boxers had a different finished texture on the fiberglass inner fenders than the previous years.

365 has a mesh screen across the rear of the clamshell for heat to escape, 6 tail lights and no model designation. 512's look the same with horizontal slats in satin black and a model designation.
 

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BBs are not well understood Ferraris by the mass. Some of the reasons may be that it was not introduced to the US market officially ( if I am not mistaken), owners do not drive them as much relatively speaking, and you simply do not see them in sight as often. Nevertheless, they are timeless, epoch making models that deserve more respect IMHO. Saying that, what you are doing is invaluable for everyone to understand BBs better. Thank You for that. w/ smiles Jimmy
 

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what you are doing is invaluable for everyone to understand BBs better. Thank You for that. w/ smiles Jimmy
+1 Excellent comparative data, thanks for sharing your knowledge.
 

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+1 Excellent comparative data, thanks for sharing your knowledge.
Hey no problem!

Onto the rear. Ferrari had the 6 lamp setup on the 365 boxer which was also used on the 365GT4 2+2 and GTC which is pretty cool.

Rear bumpers were model specific with an exception (maybe!). 365s had the 6 muffler tips to echo the tail lights perhaps, BB512 had the 4 tips, BBi had the same setup as BB512 but with the addition of the rear fog lamps. Now theres this drunken Aussie I know that claims the carbed cars also had this BBi sytle rear bumper. He went so far as to provide pics but thats the only one Ive seen. If the carbed car does come with rear fog lamps then it would be market specific but for the most part the 3 models each have their own rear bumper.

On the injected cars, 82 specifically Ive seen some with an external lock barrel for the gas tank door (which actually means there are 5 different boxer clamshells). When they come that way the gas cap is the same as the carbed Boxers (black with a smooth finish) otherwise the injected cars have a chrome locking gas cap with a prancing horse disc that slides over to reveal the lock slot.

Injected cars have a dimpled foam insert inside the airbox covers, NLA now so dont be surprised to see one without them as they crumble and disintegrate from the heat ending up all over the top of the engine.
 

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Other exterior notes, boxers only have 2 front repeaters on the sides of the car, none on the rear. Whenever there is a large rectangular lamp on the side of a boxer, its been converted to meet DOT regulations for north american use. Because boxers were imported to the US as grey market cars, they were converted at great expense to be used here, there are plenty that have undergone this unfortunate process so watch for it when buying such a car. The conversion involves adding things like seatbelt warning lamps on the dash, a small spot light to aim at the console switches, 3 eared spinners swapped for Octagon nuts (some euro markets also require octagon nuts), major reinforcements added front and rear to the frame sections and most often a very offensive pair of bumpers to meet the 5mph crash spec. The doors were then cut to allow for a crude crashbar to be inserted that is identified by a large rectangular 2 bolt plate visible on the door edge once opened to enter the car. Smog add-ons were also part of the dreaded conversion. Converters, charcoal canisters and even air injection found their way onto the cars. The problem today is there was some government crack down that forced these cars back over seas many years ago, some cars were uncertified partially, cars were brought back to north america later when the rules changed, some were then unconverted once the DOT certification was completed and on and on. A friend of mine owns such a car, its been to north america twice from europe which I found out for him doing research on his specific chassis number. To add to the confusion, depending on the conversion company, the cars were sometimes passed without much if anything being done, some were partially or sympathetically converted and some done whole hog. Usually when a boxer is unconverted, the door bars remain so thats a dead giveaway on inspection. You can also contact the DMV to check. BBi's once converted back usually lose the small park lamps and simply get filled in because the larger DOT bumpers have no place to mount them and back when the conversion was done, the left over lights were either tossed or someone has a pile of them laying around. If you see a BB512 with the red brake lamps on the outboard edges rather than the amber signal lamps, the conversion company simply swapped the lights around to reveal the edge of the red lamp to allow them to skip the process of adding red side marker lamps - smart! Otherwise, some were in the bumper sides and others put them in the clamshell which is really unfortunate considering the amount of work thats required today to undo that big hole they bored into the aluminum vs a fiberglass bumper, especially when I see an original low mile time capsule car thats been converted.

So if someone is looking for a boxer, my suggestion is if your state allows it, get a car that has never been converted so you get a version that is what it was when new. To unconvert a boxer and make it appear as it was never done is super expensive.
 

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5 different boxer clam shells. First is the early 365 lid with no louvers. I really prefer that look but it lacks the wider wheel flares the 512 has to fit the larger rear tires so as to not have them stick out like a 4x4 truck.

Next is revised 365 lid with center row. Note the slots in the air box lids which is 365 specific.

Next is the BB512, more louvers, wider flares and 4 tail lights rather than 6

Now the BB512i, note spacing between air box covers. Injected cars "air box" covers are actually plenum covers unlike the carbed cars so they are moved closer inboard to provide space above the intake manifolds.

Odd ball injected 82 lid thats market specific with recessed in lock barrel. Cant see it being a customer option because either way there is a lock to access the gas filler.
 

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I forgot, the inner fender seals (foam) are on the clamshells on the carbed cars, mounted on the inner fenders themselves on injected cars with a stainless steel strip and rubber lip. 84 boxers had a different finished texture on the fiberglass inner fenders than the previous years.
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And we are unable to find these seals/gaskets...
 

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Thanks for the clamshell shot. As for the foam, not surprised. I have a roll of dino 246 inner fender foam, has a little spilt on it but if glued onto the boxer wheel lips of the clamshell it might pass of OEM.
 
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