unc99206

since more psi = more hp, why is nobody turning up the boost higher on th k04 anymore... how high can the turbo run safely? high boost does lower reliability obviously..saying all that, how high has he k04 been tested to?

TTschwing

I can turn up your boost to 25psi or so with a Boost Machine BTW, BUT, A KO4 is basically a small turbo and can only do so much. There are things called Compressor Maps, which outline a Turbo's efficiency range. When you start getting into the 20's you start loosing efficiency and generating a lot of heat. Compressed air is hot air. The more you compress it, the hotter it gets. Unless you're dealing with the heat you may be loosing as much as you're gaining at those levels. That said, I generally set my car to boost around 22-23 psi in day to day use, but I've got all the cooling mods to handle it. A KO4 is only good for 300hp or so. Anything more is gonna take a bigger turbo..

unc99206

do you think that bigger injectors would help? more gas might make it run cooler raising the boost possibilities?

norm wild

It's about air volume, more pressure only means more heat to achieve those pressures thereby decreasing efficiency of combustion and reducing hp. A Garrett and a K03 will both achieve 20 psi, but the bigger turbo will do it with less effort (more volume quickly) and less heat. The goal is to achieve the highest amount of volume with the lowest intake temps. Most high hp motors (force induction v8s) use pretty low boost levels. My friends 7.5 second Mustang only runs about 20-25 psi, but the IC is ice packed and gigantic. If you are looking to upgrade I think you are definitely better off looking at something bigger than a K04, it's just not worth all the time and energy it takes to install it.

unc99206

not upgrading to k04, wondering what mine can do

MCPaudiTT - DEFCON 1

I imagine that TTDA and FMIC are on the list, but what other items do you put in that bucket?

hAUDIni

FMIC is th ebiggie. You can add the intercooler misters too.

peteypab

will that make the K04 worth having, what im asking is with that stuff done making the turbo basically more efficient, and more air flow its then capable to produce more HP right? ? ?

TTschwing

In addition would include

FMIC (biggy)

Samco (Smoother flow)

Mainifold insulators (I measured 20% reduction at the manifold)

Maybe Misters, but Mine's so cool now I rarely trigger them

unc99206

i've seen forge, evolution, and oct...any difference other than price?