If you put more carburettors on an engine, it reduces lifespan. I’ve always wondered why the change between just one or two carbs changes the lifespan so dramatically… so dramatic that even if the butterfly valve on the engine test mode turns red, it is still better than adding another carburettor… but I’m not sure if it is true in real life or if it is a bug? Answers please 
Note that the butterfly turning red in the test mode means the carbs aren’t flowing enough air, not that they’re failing (we do need to make this more clear I agree)
It will impact lifespan quite a bit, as its making the fuel system more complex, thus a lot more to go wrong. (lifespan should really be named something like “average time until fault” or something)
Daffy can you make the lifespan thing a little bit more clear, because not everybody will be on this forum when the game hits the shelves
We already changed “lifespan” to the more appropriate MTBF (mean time between failures). Once we have tool-tips those stats will be easy to explain, which will happen before release. 
good to hear that 
btw, i did mention some time ago about animations on the fail-stand, that could be one way out of the situation with current throttle turning red, because it can’t feed the engine
and why do turbos turn red at massive amounts of boost?
[quote=“xABSOLUTIONx”]good to hear that
btw, i did mention some time ago about animations on the fail-stand, that could be one way out of the situation with current throttle turning red, because it can’t feed the engine
and why do turbos turn red at massive amounts of boost?[/quote]
I would assume that it is because of the same reason, they can’t flow enough air?
Going back to the subject: If the complexity would reduce lifespan (or like Killrob pointed out MTBF) and there isn’t enough air going into the engine, then the most logical thing to do is increase the size of the carburettor… but you can’t do that 
There is somewhat of a limit as to how big a carburettor can be per barrel, so you’d have to move up to a more advanced carb. I’m pretty sure the absolute best carb setup you can do for power is as many Sidedraft/DCOE carbs as possible
Sorry, but no.
With a DCOE setup every cylinder only pulls air through a 45-48 mm opening.
With a dual quad, dual plane, manifold each cylinder on a v-8 can get air from 2 44.45mm or 2 50.8 mm throttles.
2 44.45mm gives the same area as a singel 62.9mm. 2 50.8mm equals one 71.8mm.
If the manifold is a singel plane, singel carb, type then each cylinder can draw from all 4 44.45mm or 50.8mm throttles.
Then if the manifold is a tunnelram type, each cylinder can draw from all 8 throttles, 44.45mm or 50.8mm.
These sizes are for the large 4150 Holley, or the bigger 4500 Holley carb.
I think these are the most common four barrel carbs on the market.
The smallest trottle available on a Holley is 36.5mm. Equals one 51.6mm throttle.
Carbs are sized to compensate for that, i.e. are given a reasonable size to start with, and they scale in size with bore.
Indeed this won’t allow you to build drag racing engines, but that’s not the goal of the game anyway.