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Holset info


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Guest ON3GO

http://dsmtuner.com/forums/showthread.php?t=145691

 

some good reading.

 

i for one would love to know in writing which Holset from what year truck will flow the most that us L guys can even use.

 

i know post-2002 and pre-2005 or around those years the HY35w was different. Later year HY35w's seem bigger then the post-2002 years.

 

also how much smaller are HX35's compared to HY35's...

 

would be nice to know so when we go shopping for one we atleast get the right one were looking for.

 

im looking for a HX40 right now :D

 

mike

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also how much smaller are HX35's compared to HY35's...

 

HX35 is slightly larger than the HY35. The exhaust housing is usually a 12 cm (supposed to be roughly a .80 a/r equivalent) while the HY35 is a 9 cm (roughly a .55 a/r equivalent). The HX35 always has a dual scroll turbine housing while the HY35's is always a single scroll.

 

The HX35 compressor housing is supposed to be roughly a .70 a/r while the HY35 roughly a .60 a/r... both flow the same maximum amount of air though, being .46 kg/s or 60.8 lbs/min. I'd say the difference is in the locations of the peak efficiency between the two.

 

They both have an anti-surge compressor housing but, stock, have a sort of ring covering that part to reduce noise. It can be taken out to regain the "anti-surge" design.

 

Both have a T3 style turbine inlet flange.

 

Another way of telling the HX/HY apart is the HY35 uses a V-band clamp to hold the turbine on, HX35 uses bolts.

 

HX40 is supposed to have a 1.00+ a.r turbine, .70 a.r compressor, and flows .53 kg/s or 70.1 lbs/min.

 

I believe the HX40 uses a T4 style turbine inlet flange.

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