The Ferrari Daytona and the Ferrari 400 engine have some conection?
No, I beleive they share the same block but the heads on the Daytona are different. I beleive the piston crown is also different to accomodate the Daytona heads. I'm sure the experts will weigh in soon on this one.
I quote from the british magazine "Fast Lane" March 1988: "...since the similarities in the upper cylinder areas of the Testarossa and 412 extend even to identical piston, fitting TR heads to the V12 would make a very interesting car, with an extra 50 hp and 28 lb ft of torque."
They are both variations of Ferrari's Colombo V12. http://en.wikipedia.org/wiki/Ferrari_Colombo_engine
Similar design, probably some interchangeability of parts but I wouldn't try to list which ones without comparing them. Colombo gets credit for most of Ferrari's engines but they aren't like "small-block" Chevys. The 250, 330, and 400 (just to pick a few) look similar but are in detail quite different. The Testarossa (flat 12) has a Colombo engine. It is not too similar to any of the others (except Boxer). Is this an academic question or do you have a purpose in mind?
Didn't the Daytona have central downdraft carbs and the 400's went to outboard side drafts for the purpose of lowering the hood profile. That is the description I read in one of the books of the "period Ferrari's". This would make the heads and cam carriers distinctly different. Ken
Here's a comparison between 400GT and Daytona heads and crankcase. The 400GT is shown first in each example. The 400 has intake ports between the cams (manifolds are part of the exhaust cam cover). Daytona has intake ports "down in the valley" on the inside. It's just a few parts but the similarities are obvious. Image Unavailable, Please Login Image Unavailable, Please Login Image Unavailable, Please Login Image Unavailable, Please Login
So, just the exhoust cam is chain driven on the Daytona and the intake cam is gear driven off of that, as opposed to the 400 which uses a chain to drive all four cams. That explains why the chain cam drive chains would fail sooner on the 400. Thanks for the pictures. The Daytona is also dry sump, so it can be lower in the car which gives the car a better C. G. and allows the use of a cross flow heads = more power. but obviously we can see that a 400 is a modified (detuned?) Daytona engine. Many parts are interchangable.
This particular article is what gave me a case of the 'gots to have' with a 412...good pics, too One o' these days, gonna happen...
Testarossa heads on a 412? Am I missing something? Different ports, chaindrive cams vs belts probably a lot of other differences. Anything is possible but there are probably easier ways to get horsepower.
Actually, the timing chain on the Daytona goes around an idler sprocket located in between and below the intake and exhaust cams. This idler sprocket than directly drives the cams via gears. It looks like it was an expedient way to convert the SOHC Colombo engine into a DOHC engine. The timing chain arrangement then is practically the same between SOHC and DOHC engines. The 365GTC/4 and related engines has the chain around both cams, which makes it a lot longer. I know the Daytona and 365BB/4 shared pistons, valves, cams, etc. I wouldnt' be surprised if some of these parts were common to the 365GTC/4 and 365GT/4 2+2. -steve
Steve, I see it now, Thanks. I have been wanting to know the diffrence for some time now, you really helped. Great forum, Fritz
