A tachometer will help your engine by helping you make more efficient use of it.
Proper engine maintanace is the only thing that will insure optimal engine performance. Doing some simple things like using a higher octane fuel,and installing high quality air filter will also help your performance.
exact RPM
it depends on the engine. generally it boosts the performance at high revs
K&N makes quality performance products, esecially air filters.
Where is the engine made?? should be on one of the labels under the hood?? chip---gearing??? yes if you do a little research on exactly what kind of "performance " you want and how to best get it.
It MAY help the performance of your transmission if it needs to be serviced (fluid and filter/screen change). However, it will not increase the performance of your engine.
There are many fuel additives that you can use that will help your car burn less oil. Using high grade additives can help treat friction in your engine at the the actual source.
Yes, illegal, will not help performance, will cause check engine light to come on, ................
it can be but is not going to help with performance. depending what sort of diesel engine you have, depends on what you can do to improve performance a good diesel mechanic can turn up the fuel pump, change injectors etc. vehicles with computers can have chip added that vastly improves performance and is easiest way to go
and, or, not
Green wire on the distributor is the tachometer pick up. Green wire on the distributor is the tachometer pick up.
Using a high-quality synthetic engine oil with a low viscosity can help reduce friction in a car engine by providing better lubrication between moving parts. It is important to follow the manufacturer's recommendations for oil viscosity and change intervals to optimize engine performance and reduce wear.