How much boost on stock motor? 9.6:1 comp

**xenonkuraz** · 14-10-2012 11:32 PM

Hi guys,

Just wondering how far I can push the k20 on standard internals reliably? on this sort of comp ratio I'd like to see around 12psi...

**infurNOS** · 15-10-2012 06:06 PM

No one can answer this question without knowing your turbo's specs. Its also more of how much hp or kw to run, rather than PSI.

For example 15 pound of boost on a gt30 is different from 15 pound on a gt40, it is also reliant on how good your tune is.

**DakDak** · 15-10-2012 06:11 PM

^ Would rep if I could.

**infurNOS** · 15-10-2012 06:16 PM

Originally Posted by DakDak

^ Would rep if I could.

It's ok, it's the thought that counts :P

**newpaddy3** · 15-10-2012 06:21 PM

Originally Posted by DakDak

^ Would rep if I could.

I raped for you.

**Vvvtec** · 15-10-2012 06:22 PM

same.

**TbM** · 15-10-2012 06:23 PM

Originally Posted by infurNOS

No one can answer this question without knowing your turbo's specs. Its also more of how much hp or kw to run, rather than PSI.

For example 15 pound of boost on a gt30 is different from 15 pound on a gt40, it is also reliant on how good your tune is.

**EKVTIR-T** · 15-10-2012 06:23 PM

Its my unprofessional opinion that 12psi will be fine if properly tuned

**curtis265** · 15-10-2012 06:27 PM

raped.

**stndrd** · 15-10-2012 06:41 PM

It all comes down to your supporting mods (fuel system & tune mainly) and if you are preared to shorten the life of the engine. As mentioned, turbo sizing and specs play a big key but 12psi on a 9.6:1 engine is theoretically ok. I would not push much further and quality of internals will most likely be up to scratch

**DLO01** · 15-10-2012 07:02 PM

Really depends how you drive the thing as well. Constant prolonged load/boost will kill just about any engine. Good thermal aids are a plus, decent sized oil cooler. Lower temp thermo and fan switch.