My sleeper

[Thuppu]

Just an old school K31 7175

Is it possible the girdle has bent the main line? How well did you do/measure the shimms?

[hammer]

Yesterday i looked to the Main and Rod bearings.
Zylinder 3 and 4 rod bearings in Bad condition

Also Main 1 and 5. At 3 and 4 it is just on one side.

I think on high torque it bends the crankshaft. What do you think?

[hammer]

I'm also just thinking which housing would suite my future stroker build with 75mm turbine wheel, #20 or #24 size..?

What turbo?

[Thuppu]

Ok, you have EFR. Seems to flow quite good for such a small compressor. Propably the turbine housing is restricting after all, at least that EVO dyno plot shows great gain in power with quite small loss in spool.

I'm also just thinking which housing would suite my future stroker build with 75mm turbine wheel, #20 or #24 size..?

[hammer]

Is that Evo using pumpgas or E85?

I dont no. But think E85

[Tille]

Is that Evo using pumpgas or E85?

[diesel des]

Ok maybe the big at turbine housing will help then.

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[hammer]

Also find a dyno Graph from a evo 2,2l with Efr9180 1.05 us 1,45 housing

[hammer]

No, dont look at pressure befor and after intercooler but just have 30° after intercooler.
Efr9180 flows max 95lbs/min

[Thuppu]

Really rough rule 1 lbs/min = 10hp. For example Holset HX50 67/98mm comp wheel flows max 83 lbs/min.

[diesel des]

If you had more boost than exhaust manifold drive pressure I don't think the turbine side is the issue. What intercooler inlet pressure and temperature had you vs inlet manifold pressure and temperature. I don't think your turbine side is the issue. Sure a bigger housing will give a few % but that's all I think.

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[hammer]

Have you measured things like exhaust back pressure at the downpipe, inlet vacume after air filter and pressure loss across intercooler. Something odd going on.

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Yes look at the backpressure, had 2bar @2.2bar boost. But it was a silicone Tube over a Metal pipe and think it lost pressure. Have to control this.
But its just a 1.05 housing, so i think that's the restriction

[hammer]

That turbine is huge. Shouldn't restrict at this level. Holset Pro52 has 72mm turbine and #16 housing and it's good to 900hp. Are you sure the comp wheel doesn't run on the map limit? In fact that is quite good result with so small compressor.

No, i don't have rmp from the comp.
Do you think that a 92mm compressor wheel is to small for 900 hp?

[diesel des]

Have you measured things like exhaust back pressure at the downpipe, inlet vacume after air filter and pressure loss across intercooler. Something odd going on.

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[Thuppu]

That turbine is huge. Shouldn't restrict at this level. Holset Pro52 has 72mm turbine and #16 housing and it's good to 900hp. Are you sure the comp wheel doesn't run on the map limit? In fact that is quite good result with so small compressor.