BOOSTD

I can understand how this causes a problem. The gas will be travelling slowly up to the .8 A/R scroll then accelerated at an enormous rate through the scroll. The resulting pressure difference between the manifold and turbine housing would cause turbulance increasing back pressure. I guess continuous smooth acceleration is what ur after to reach max flow and velocity. So in this theory no wonder matched manifold/turbo kits kick serious butt. Wonder what the formula looks like to work this out..........scary Great read Steve.

I'm putting my pistons in on saturday morning. Cam gears are easy and I'm on holidays till jan...Yip Yar

I didn't know J was a cop.. lol

I'm a coming......like a grease monkey =p better bring a towel for ole stinky to sit on----love the grease.

I was told o ringing the block was a waste of time if you had a metal head gasket. Has anyone seen a RB25 blow a head gasket? SR is suited to o rings ,but, apparently wasted on an rb25.

Ive decided to go with CR 8.5:1

withdrawn from sale.

less detenation, less need for high octane fuel. Gives the ability to safetly run more boost.

What is the best comp ratio for 280-300rwkw?

Shan has already pulled her spark plugs and gapped them....didn't even break a nail. Hmmn maybe you can put my pistons in honey??

yep another couple of hours work.

Not sure ,but, was recommended by OS in japan for a 500hp setup. I had to go with a 1.6mm as my head is being shaved due to damage.

wouldn't like to be going back now for a warrenty fix.....

Yip yar, nice one Clicks

It is for a RB25DET.

HKS Metal Head Gasket 1.2mm Brand new still sealed in plastic matt 0413023669

will take the bar off ur hands if it will fit, and shan wants the spoiler. did john ring you about the blue beast....pm.me

The rb20 will spool up this turbo later, so theoretically you can have a smaller turbine snout. Strangley enough boring out the turbine snout made hardly any difference to boost response.

I found that my PFC indication of 90% injector duty cycle was actually 100%, any addition of fuel made no difference to Air fuel ratio's

Shuts the injectors down.

Depending on what shaft is used. There is a thick and thin one. You will see what I mean when you look at a few sitting on the shelf. I chose the thick one as the turbine is more reliable. The T04 needs to be drilled to fit.

The Vtrim cannot be allowed to make 15psi before 4000 rpm or it will surge. A steel wheel will cause more restrictin and reducing lag is not what a good thing.

Dean: 15psi by 4000rpm will eliminate surge which is what I'm aiming at with 53.5mm Muffas 180: The comp wheel was modified to fit the shaft. The thick shaft from a VG30 is the one to look for, tonnes my reliable on the Ceramic turbine side.

Could be plug gaps or boost cut. Boost cut is a A/F versus time versus rpm calculation not boost level, which means It might not cut at a certain boost level all the time ,but, just when loaded up. Be carefull with fuel cut defenders as they are easily set to low causing lean mixtures and detenation. hope that helps plug gap should be ~.7mm

A reason why most crack number one that is