[DML] Re: Upgrading the Air Filter

["bluemax86" <massimot@xxxxxxxxxxxx>]

There have been a couple of posts mentioning that the engineers know
what they are doing and have all the resources and tools to put good
engines together. While I agree with this, isn't it also true that
they have to work within the constraints of the final cost of the car.
So wouldn't it be possible that the engineers would not put in a
better design, to gain horspower or efficiency, if it cost too much or
it added too much time to the assembly line or they just didn't have
enough development time to design something better.

Max
VIN 4819

--- In dmcnews@xxxxxxxxxxxxxxx, mike.griese@xxxx wrote:
> 
> And if you do things without measuring the results, you have no
> idea what you've got.
> 
> I don't trust the seat of anybody's pants...
> 
> What I am saying is that engines, brakes, transmissions, coolant 
> systems etc. are all designed as a system by experienced automotive
> engineers with access to tools that can conclusively show the impacts
> of a change to any part of the system.  Replacing bits and pieces 
> with aftermarket parts that were not specifically designed or tested 
> with the DeLorean with the intent of improving performance based on 
> the component manufacturer's claim is a gamble.
> 
> The Bosch +4 plug is a perfect example.  They don't improve 
> performance in every case.  In fact, they can reduce performance as 
> we have found for the Lotus 9xx engines.  The shape of the 
> combustion chamber, the placement of the plug, and the 
> characteristics of the spark make for less complete combustion
> than with the original equipment plugs.  
> 
> Mucking around with brakes and suspension is particularly
> risky if you don't understand the dynamics of the system.
> Increasing front brake capacity without adjusting the rear
> brake bias can make the car unstable under braking.  This
> increases the liklihood of locking up the front brakes.  Putting
> large diameter, low profile tires, lowering suspensions, 
> changing wheel offsets can have an adverse effect on handling.
> This is why a number of major insurance companies are refusing
> to honor claims for modified import cars.
> 
> I'm not saying that all aftermarket parts are snake oil.  There are 
> a lot of well designed systems that are built for specific applications
> that work quite well.  Often these systems are engineered with 
> the participation of the original manufacturer and are typically done 
> for markets that are much much larger than the DeLorean.  Expecting 
> those same parts to bolt on to the DeLorean and make the same
improvments
> is a stretch.
> 
> --
> Mike
 
 









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