I love you guys.
If you internally balance the crank .... And neutral balance the pulley and the fly ..then you can change the pulley and fly wheel without balancing the whole rotating mass together....
This is a good replacement for the ****tty original damper, this is no rubber damper Image Unavailable, Please Login
have you ever seen a damper come apart at 7500 rpm do you know what happen then?? the rubber is 40 years old it need to be replaced before start using the engine near redline, it is not only the rubber that make problem on damper, its also way to loose on the crank, causing material to rub off from the crankshaft and making bearing failure
Peter, What is the material? Balancing? We have always made alloy dampers for racing Alfa Romeo engines, but they are an inline 4. Regards, Alberto
you will find it here: new home page H.B. Ferrari marked the balancer and the crankshaft with the same number, paired them for good reasons, I was told by an expert....
Gave Dale a call, at the site recommended by Matthias. Very pleasant fellow, and also gave me an education on Harmonic Balancers. His strongest point, is that the balancer does not fly apart as some may think, that there is a separation between the outer and inner rings, when in reality, the balancer effectively ceases to work as the rubber becomes too stiff. The rubber, allows the outer ring to counterbalance torsional stresses in the crank, thus it is the crank's lifesaver as it has a delayed reaction to torque. Proofing is as follows: if your thumbnail hurts when you try to compress the rubber, then it is time to re-rubber. Obviously, grease, fuel, very dirty engines end up contaminating that rubber, and at 40 years+ it really is a no-brainer, and we all know when Dino was neglected...it really was. At a $110 per, I think very inexpensive life insurance and a much smoother running engine. Regards, Alberto
What part of the harmonic balancer is rubber? I thought it was balanced by having precision holes drilled in it at locations that result in a rotating balance
There a two metal segments [inner and outer] cores that are joined by rubber, as previously stated this rubber core will become brittle and harden over the years and be less effective in dampening out internal resonance in the engine. The damper is a rotating mass outside the dia of the crank and therefore has to be balanced. A small inbalance of a few ounces can be many pounds/force at 7500K. However whether this can be balanced off the engine if open to debate, I say this because when my engine was balanced i had to provide everything that is attached to the crank for balancing and that included the torsional damper (TD) and even the securing bolt / washer. So i would be cautious about just changing it for a new one. Incidentally when it came back the outer ring had holes redrilled in several places because the unit was way out of balance. I was advised the TD was OK so refitted it, however stressing the engine IMO is not good and so stick to no more than 5K. Tony
So, if the rubber ring fails then center section stays attached to crankshaft and, outer ring flies away. Is that the scenario? Some collateral damage, but engine keeps spinning, charging light will come on. Time for a new fan belt.
Nice one, you will have plenty of room to get the new belt on....try the next size down!! Seriously, it will do lots of damage. Tony
the outer ring comes off and flies through the rear window, so you have to buy a new one here http://www.ferrarichat.com/forum/206-246/323376-dino-rear-windows-tempered-glass-now-available.html and hit the passenger in the head so he gets headaches
interesting flight path so when does the damper do most of its work? at start up 0 to 7000 rpm cause it sounds nice 2nd to 5th at 40mph or 5 to 2nd at 40mph cause the driver can't drive slogging at 2500 rpm in 5th cause ....cant think of whey anybody would do that learning how to drive and staying between 3500 and 6000 making nice with the gearbox because that's when the engine thinks happy thoughts. under normal conditions, I would say starting cold......
I have my rev limiter set to cut in around 6500. Actually I like the sound best a bit below that anyway, so I seldom go to 6K.
All of these discussions are good points however whenever I take my DINO or any of my other cars out I Like to run it a 90% or so . I keep my cars well maintained and that is what I bought them for . THe Dino at 6500 RPM is awesome and not to run these cars is a real shame. I probably will hold it a little under redline just to be careful ... NOw I have another car 427/435 solid lifter corvette that has the original engine and never been apart that I regularly for the last 12 years run to deadline every time I drive it. I really think it helps the car run better... I could go on but we bought these cars we should RUN THEM as they were designed just my 2cents... LarryH
Have you actually WATCHED the video of the "Turbaned Torpedo" (sic)? (he actually is referred to as the "Turbaned Tornado"). He clearly has his rev limiter set at about 500, and certainly not 7000! Oh, and he didn't run a marathon in Hong Kong - he "ran" 6.2 miles and then retired. The last marathon that he ran was Toronto's waterfront marathon which he ran in just over 8 hours and 11 minutes. 101-Year-Old 'Turbaned Tornado' Retires From Running : The Two-Way : NPR
Interesting thread, although I have never heard of a Dino's harmonic damper failing. But - I have heard of FRAM oil filters failing (like yours).
I had a harmonic damper with the rubber so week, that the outer ring loosened... It holds on and doesn`t cause any damage....
No one mentioned oil cleanliness and temps. When I used to track a fair amount, I'd put in fresh oil before an event, and I was always impressed with how clean it stayed for a given amount of miles -- then I'd compare fresh oil over the same miles, but with gentle street driving, and the oil looked kind of crummy, and I noticed moisture build up under the oil fill caps. As for rev's. I'm as aware as anyone regarding the $$$ I put in my engine doing the overhaul, and I kind of compare it to aircraft engine use. The wear is related to the hours on it also depending on how hard its used. Although, I love the song produced when it gets to the 8k number, and it does so - so easily, that I battle my enjoyment vs using it up. I guess I trust my overhaul in addition to the engines design / balanced by how infrequently I use it that I will just try and enjoy it - - - - carefully of course
If you are worried about revving your Dino engine to redline, it must be time to rebuild it surely. As those that putter around in their Dino appear to be in the "I like to look at my car" crowd, I would encourage you to remove your engine and slowly over time rebuild it. Thankfully you can still look at your beautiful car while the engine is out ... thus a win win situation. BTW: A few months ago I went to Eastern Creek to check in on a friend and see how his 911 Porsche was going at his first race meeting. While there I watched another 2.7 RS 911 have a wee bit of trouble starting. I was told by my friend that that car had never had it's engine opened and had been and still is raced as often as the owner can ... and other than the starting issue still performs very well (in fact faster than my friends car). Revving an engine to redline is not abuse. Missing oil changes or over revving an engine, or not using a car is abuse. If you took your time, ie. a couple of years and did a lot of the assembling yourself you can spread the cost ... but if it was my car, I'd check all valve clearances, inspect engine bearings, etc. and thus ensure it is properly mechanically serviced and relax and enjoy the car with the ocassional blast to redline. Pete
I rev mine to near limit once fully warmed at least EVRY drive....last time I nearly helped the son and daughter of my 85 year old neighbour to an early inheritance - i could think of worse ways to go. I also put a steering column extender (from superformances) on which took the wheel off my lap and helped viz of the speedo and rev counter. R
In the June issue of Sports Car Market there is an article on a 1967 2.4L Fiat Dino Spider that sold at RM at Amelia in March. In the article written by Donald Osborne, a very knowledgeable expert is the statement...... "That sparkling performance was also very reliable - thanks to the work of Fiat engineers led by Aurelio Lampredi. They had to rationalize the design of the 2-liter engine for factory production in Turin. While it was redlined at 8,000 rpm, the engine was actually test run up to 10,000 rpm." If this is so then let 'er rip!