LET Backpressure in exhaust

[c20let]

Did some measurements on backpressures at diff boost with original exh.manifold. Measured just before the entrance to the Turbine at 4000 rpm.

Useful information or "nice to have" ? I dont know, but here it is.

Boost / Backpressure.

- 0,2 / 0,25
0,0 / 0,45
0,1 / 0,55
0,3 / 0,75
0,5 / 0,90
0,7 / 1,30
0,9 / 1,80
1,1 / 2,00
1,3 / 2,20
1,5 / 2,45

[Cemesis]

Whats the backpressure measured in? Pa?

[c20let]

Hi Cemesis, both boost and backpressure measured in Bar !

[JohnA]

Do you have any more, or any rpm figures?

You see, 1 bar boost at 3Krpm is not the same as 1 bar at 5Krpm, the backpressure will be much higher the second time

I'd like to use these figures in my website, if you don't mind

PS:
you have specified that you don't want to receive emails or Private Messages from this board. Is this intentional, or some default setting you never changed?

[c20let]

Hi JohnA,

All the measurments is done at 4000 rpm.

Mybe I can do some tests at higher revs.

I will also do some tests after the Turbine.

If you want to use the figures on your exellent site, please do.

Private mess. is now ON.

[JohnA]

Originally posted by c20let
...If you want to use the figures on your exellent site, please do...

One does what one can, doesn't one?

[Matheus428]

high back pressure = low power. Because this need use a big turbine and good exhaust manifold when you think in make a really strong turbo engine.


cheers,