They are already in a spending war.
Limiting the development just means they then have to devote resources to calculating how much of the available development (that they have already done) can be applied through the rules.
The token system has actually meant that in practice the manufacturers now run two engine development teams - one that develops the current engine and one that develops next seasons engine (built under the same rules with more tokens). [source needed]
Are you saying that calculating their development path costs as much as unlimited spending on building brand new engines from the ground up?
It was spend up front by at least Mercedes. And you only have four engines and limited tokens to use them. So they keep testing and discarding parts before any of them make it to the track. You used to see incremental updates for the engines. Perhaps only 5-10 hp with each update, but 20 races later it is 100-150 hp improvement. Now it is zero and in the Renault case you wait until the end of the season to have perhaps 75 hp. Because using tokens for bad parts is more of a problem since you need to stick with it.
If development wasn't limited Mercedes would be forced to spend that amount every year, instead of only up to 2014. There's zero improvement for Renault/Honda because they don't have the funding/facilities/experience to compete with the big boys, not because tokens aren't allowing them to improve. I seriously doubt they have Mercedes beaters on the dyno that they can't use because they lack the tokens.
There was already a spending war within the engine divisions of Mercedes, Ferrari and Renault to get to the point where they had engines at the start of 2014. That was totally unrestricted. Mercedes spent by far the most and they won.
The token system is literally preventing other manufacturers from spending the relatively small incremental amount efficiently - that Mercedes have already spent - in order to catch them up.
If it's about cost why not look at what Mercedes have spent in full (lets say its $1.2bn) and say that you can't spend a cent more than that...
What costs more, spending war for 2 years or spending war for 8-10 (assuming FIA decide on new PUs for around 2020 or so)?
I think a budget cap for engine manuacturers would've been swell, but it's too late for that.
The smart play would have been simply to mandate a fuel flow rate, and let the manufacturers come up with their own engine designs. Would have allowed for creative solutions that in turn would have allowed for the opportunity to improve much easier than what the current system allows for.
Of course, this being F1, the smart play is off the table before it ever gets there.
They all would've converged to a similar design, while spending triple the money they are now. And I think it wouldn't have been a huge fire spitting V12, but a tiny inline 4 with a huge boost.
Edited by KingTiger, 30 September 2015 - 15:35.