What AR is a holset 19cm turbine?

[dennisbots]

Hi,

I found a new hx40 for cheap from a Volvo truck but it has a 19cm exhaust/turbine housing.
Can somebody tell me what AR this is?
Or maybe from all the cm housings to ar?

Or what kind of turbine housing should i be looking for on a:
Mercedes 190 2.5 16v (4cylinder)
9-1 compression
3inch exhaust
split-pulse manifold
Vems
Stock head for now but will be machined
cams:
duration[0.1mm+cl] IN 282° EX 261°
duration[1.0mm+cl] IN 248° EX 224°
valve lift [cl=0] IN 11.50mm EX 10.15mm
peak angle IN 110° EX 120°
timing[1.0mm+cl] IN 14/54° EX 52/-8°
lift at TDC[cl=0] IN 2.95mm EX 0.75mm

Lets say the goal is bout 550-600hp with not to much turbo lag.
8500+rpm

Btw
assynumber of the turbo is 3590002
customer number is 3979060

Greetings Dennis

[Finnsebbe]

A racing turbo dealer once told me that a HX40 #14 equals about 0.84 and #16 about 1.0 in a/r. Maybe one can extrapolate what #19 equals?

[dennisbots]

Hmm if that is true then it the 19cm is way to big.
I thought myself i needed something about ar .80+ so i think i will need the 14cm housing.

Can anybody confirm what finnsebbe is saying??
And maybe somebody knows when i can get a housing for cheap?

The cheapest i could find was 180dollar in de usa:
(end of the page)
http://smokindiesel.com/dodge/turbochargers.html

[Jens Gustavsson]

tell me how big the turbo is instead (inlopp och ut mot avgassystemet på minasta stället)

A/R is not the way you know how fast its going to spool up.

[dennisbots]

All i know now that it is a 60mm 6blade inducer for the compressor.
And a 65mm exducer for the turbine.

The turbo is still in the mail so i can check it later on this week.

I also found this on the net but i dont know if it is correct:

6 cm2 = 0.41 A/R
7 cm2 = 0.49 A/R
8 cm2 = 0.57 A/R
9 cm2 = 0.65 A/R
10 cm2 = 0.73 A/R
11 cm2 = 0.81 A/R
12 cm2 = 0.89 A/R
14 cm2 = 0.97 A/R
15 cm2 = 1.05 A/R
16 cm2 = 1.13 A/R
17 cm2 = 1.29 A/R
19 cm2 = 1.37 A/R

[mattias]

That A/R table is only comparable to a certain turbine size, since it's a ratio and not a direct measurement of size.

Garrett are among the few how use A/R, other manufacturers use the actual area. The most important factor is turbine wheel size, specifically the exducer (65 mm in your case).

You are going to be limited by the compressor size on this engine, about 600 hp. My guess is the turbine will work well for your goals, at the very high revs the engine may show signs of problems with the size of the turbine. Personally I would have used a larger turbo, that is a very nice and strong N/A engine.

[Jens Gustavsson]

you have full boost at 3500rpm or somting is wrong.

[Rba]

That A/R-cm2 table is only for comparasion between Mitsu (cm2) and Garrett (A/R).

[mattias]

That A/R-cm2 table is only for comparasion between Mitsu (cm2) and Garrett (A/R).

And in addition it is only true for a specific turbine, so it's useless information without knowing what turbine they refer to.