bigmikespec

Small turbine housing, restrictive exhaust with a big pump (engine)... engine is choking. 3.5" will do it... a 2" will 'do it' but why would you want to? Biggest exhaust you can then try and make it quiet with highest flowing mufflers you can if that is an issue.

On this engine turbo is the restriction!

Was going to say those hands at top of page cleaned up nicely... haha. Sump pan looks fkn mint, I am loving this build.

Did you get my PM?

keen

This doesn't sound right... piston acceleration goes up with stroker engines as will squish velocity. More reason to spend time modifying (removing material) squish pads.

Firstly, there is not a lot of 'squish' pad in a 4-valve chamber anyway. The squish pads create an area of 'quench' which is a point where combustion will not occur. This is seen as a good thing, however, the problem occurs when the fuel/air mixture is accelerated past a sharp edge like the edge of a squish pad and this gets worse when there is high rpm, high cylinder pressures, etc... This creates a hot spot which can be the cause of detonation and other nasty things. Personally I feel the best way to combat this is to do as was already suggested which is to un-shroud the valves which will probably eat into the material of the squish pad, remember, flow around the valve is more important. Secondly, spend some time removing the sharp edges of the remaining squish pad in the combustion chamber and 'lay it back'. If you are going all out, next step is to get some custom pistons made with a mold of the combustion chamber when it is finished.

Winner! It is a drag car only, they have run mid 7's with an RB... now with a VR inside.

https://www.youtube.com/watch?v=mwrisT2Yvg8

PM sent, also have boot latch on body of car.

I should have the trunk liner and everything to go with it. PM me with your exact requirements. Also spare tyre cover and mesh for intercooler.

Fk that block looks thick! lol

Yes great build. The seats look like CuBe to me!

They don't look like steel seats to me!...???

That is the way it should be done!

Yes I don't disagree that results are important but results coupled with choosing the right compressor from a map is the ideal scenario. I am interested to know why people choose otherwise, if they cannot offer any other reason other than they saw a result on the internet then that is fine with me.

So does a compressor map; and it is not subject to different dyno, conditions, etc

Why would choose a Precision over the Garrett?

GTX4202R

??? What does the compressor flow? And at what pressure ratio? Unanswerable questions as Precision don't publish compressor maps.

The wheels on the GT45 are both bigger so more inertia required to move them. Again, I would go a smaller set of wheels and larger housing, I think the smaller wheels will offset the larger housing in terms of boost threshold.

Ok, so over 1100hp at the engine, well if that is the case then the GTX4508R will do it. The GTX4202R might do it, to be honest, if it was me I would go the GTX4202R and push as much as you can out of it. Go the biggest turbine housing, keep upping the boost until the compressor makes no more power; on the limit it will flow110lbs/min which is roughly 1100hp.

Damn that is a big turbo, how much power do you want at engine?

Anyone keen for a #3? I missed out the first two times but ready to go! RHD Japan have a special for around 1500-1600 AUD.

A deeper narrower sump is improved as the oil is always closer to the pickup like the Trust design. If it is gated and much larger, wider, etc then of course that is better again. More oil capacity is always better, more cooling effect and less risk of starvation with higher flowing oil pumps.