Hi all,

Wot is the highest boost i can run on stock internals? Ive always run @15 psi before can i push her anymore?

My spec list so far is:

 

Dta ecu chip

apexi avc r boost controller

nismo 555's

twin air filters

fmic

hard pipe kit + samcos

custom made decat exhaust

stage 2 t25 garrett 360 roller bearing turbos 20 psi max

koyo ali rad

x2 dump valves

 

regards dan

think your looking at ring land failure at higher psi on standard pistons

Hi all,

Wot is the highest boost i can run on stock internals? Ive always run @15 psi before can i push her anymore?

My spec list so far is:

 

stage 2 t25 garrett 360 roller bearing turbos 20 psi maxregards dan

 

 

Firstly

 

Are your turbo's 360 degree thrust bearings or are they roller bearing?

 

Either way 20 psi would kill them off very quickley as T25's would produce emence heat attempting those psi figures and you performance would be seriously less than running about 15 psi? Remember it is not just airflow but air dencity. So the hotter the air the less dencity so less oxigen for good combustion. I also doubt that the DTA chip would provide a good enough feul map for those boost presures and you'll end up with detting if your not carefull. Which will destroy the standard pistons.

 

The other issue would be the head gaskets. Even new OEM on a new build engine would peoberbly fail under regular 20 psi and on an old engine are one of the regular items to fail anyway. Even running a standard setup. Then there is the general condition of the Valve stem seals conition of the bores etc. I would guestimate a standard lump without any serious overhaule will fail very quickly running more than 15 psi.

 

You'll also need a serious oil cooler with a proper take off plate as the standard 10mm set up is designed to only cool part of the oil on a presure regulator. + The standard cooler would be way too small and you need to be looking at at least a 15 row x 235mm x 28mm on 1/2 inch or 5/8 inch feeds.

 

you'd need a divorced duel intake system to allow that kind of air volume and then you'd need either a duel MAF set up with Fuel controler to average the Signal to the ECU or a stand alone aftermarket programable ECU with MAP sensor inputs and wide band Lambas.

think ill leave it @ 15 psi then more than enough :)

thanx for your replys