How do engine tuners increase horsepower

[wizzer]

How do engine tuners increase horsepower?

Are there some tried and tested methods and parts they use? What do you recommend are the top and best ways to make more Horsepower?

 

[TCJBOLDIE]

There are so many ways to increase power in a turbo motor and a few are
- Hi flow the existing turbo
- Install a larger more effective intercooler
- Install a larger turbo
- Install a big bore turbo back exhaust with free flowing silencers
- Increase boost pressure.
- Reprogram fuel and ignition maps to suit.
- Install an aftermarket computer/EMS

All of the above can be done without opening the motor PROVIDED THAT the motor is able to handle the amount of additional stress/power reliably .

FWIW my motor was built to handle the 200% + power increase with a hot tanked crack tested bored block,head and crank with forged pistons and rods,balanced,ARP main and head studs,MLS head gasket,and a ported head with aftermarket cams.and there have been zero problems for 4 years and app 20000 KLMS.

 

[obi_waynne]

They need to look at the engine itself and what the drivers aims are.

For extreme upgrades of power you need to do major work on the engine, practically rebuilding it in many cases.

Most people just want to add to their car in stages so a more modular approach is taken but again you need to plan for the long term end game.