Fiat Dino Forum (FDF)

As far as I have understood, no 1987 cc Dino engine were equipped with sodium-filled exhaust valves - at all. These were introduced in the 2418 cc engines. Some years ago, a professional Ferrari mechanic told me that the sodium-filled valves were developed in the late sixties for racing purpose and ...

I have never seen any kind of documentation saying the 1987cc Dino engines had sodium-filled exhaust valves from factory. All the 2418 cc Dinos had these, causing their owners a lot of dropped valve disasters... Different experts often claims the sodium-filled exhaust valves get brittle over the yea...

First, in general terms, the +12V feed in a car is not wired from the fuse box to just one particular bulb, relay, electrical engine or switch. To cut down the length and complexity of the wire harness, several of the car´s electrical installations are sharing the same power feed. A wire with a cert...

Re the pictured chassis number plate, it is probably not the original one, as the "135 AS" always was printed with black paint on the original plates. Only the homologation number, the actual chassis number and the spare parts numbers digits were stamped into the aluminium plate. Also, the...

Many small parts in Weber carburettors are identical and used in several models.
Strange enough, this is not the case with the idle jets in DCN 40 and DCNF 40:

The original numbers are often shown as 74401. and 74405. (followed by the size
number, e.g. 055)


Dinoswede

This "classic" hesitation is probably just depending on too small idle jets. To work well with our "modern" ethanolmixed fuel, the original 0.50 or 0.55 are too small. Try 0.60 or even 0.65 instead. That, and strong ignition sparks from a working Dinoplex or MSD ignition usually ...

It is the relay number 31, controlling the no-charge warning light, number 50.

In the electric wiring diagram, it is not shown placed-out as in reality!


Dinoswede

Re your description, I would guess you have a fuel feed issue, rather than an ignition problem. Have you adjusted the fuel pressure through the FilterKing to feed the Webers with 0.25 Bar? Also, the Weber float level adjustment is of great importance. Note that DCN 40 and DCNF 40 have different reco...

As far as I remember, the red mark at the distributor housing is indicating ignition point for cylinder no 1. However, the 10 degree mark at the crankshaft pulley is for adjusting the ignition point at cylinder no 4! This 10 degree mark can also be used checking the ignition timing for "the oth...

When other FDF members send me PMs, I earlier always have got an automatic sent e-mail from FDF that I have got a message waiting in my inbox. Nowadays this is not working. Why? For instance - by coincidence - I four days ago found a PM sent to me a month ago (!) without I have got any notices about...