pacificdrumma
Well-Known Member
A have a line on a genuine Holset HX40 "Super 40" 7-blade compressor wheel turbo. What would I need to do to spool something like this? Is it worth considering? Truck is a 96 auto
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Holset HX-40 Super??
- Thread starter pacificdrumma
- Start date
ak diesel driver
6.5 driver
quite afew people using them.
Jorge6.5
Well-Known Member
What size turbine housing?
Open ended ? but a new tune, QSV come to mind.
Project57idi
New Member
You don't need a qsv to spool an hx40. Unless it's got a huge uncommon turbine housing, a tune for said turbo should be all you need. If you want to pick up some boost threshold with that setup, look into ceramic coatings, manifold porting, exhaust wrap, turbo blankets... Basically anything to keep velocity and heat in the exhaust stream.
turbovanman
I has boost, :O)
16cm housing will be laggy and smoky around town unless you get a tune for it, but when she lights, hold on.
pacificdrumma
Well-Known Member
These are the two. I don't know compressor specs offhand. Maybe some of you more knowledgeable guys can tell just by looking. What would I have to do as far as a down pipe goes? And what could I expect for boost with a tune? Can I safely run 15-18psi without head studs like an ATT?
turbovanman
I has boost, :O)
6 blade is probably around a 56mm compressor wheel, being a Volvo it could even be a billet like mine, probably the best flowing stock compressor wheel from what I've read. Turbines are all the same size, just different blades, 10 being the best.
What's the part number? Its on the tag on the compressor cover.
Somewhere on the mounting flange, either inside the scrolls right up front or outside will be a number, IE 12 or 14 or 16 etc.
What's the part number? Its on the tag on the compressor cover.
Somewhere on the mounting flange, either inside the scrolls right up front or outside will be a number, IE 12 or 14 or 16 etc.
pacificdrumma
Well-Known Member
I know the second turbo is a 16, not sure about the first. I thought that the 7-blade was closer to 60mm and most desirable?
turbovanman
I has boost, :O)
There are a few sizes, blade count etc is not a good way to determine which is better. The billet 56mm wheel flows more than the cast wheels from what I've read on the DSM forum, a close match is the 60mm super 40 wheel. You can't really go wrong with any HX40 wheel though.
pacificdrumma
Well-Known Member
What did you guys do as far as a down pipe?
turbovanman
I has boost, :O)
"racedaymechanic" makes one that adapts to the stock DP. If you have a Volvo turbo, the flange on the turbine could be different.
pacificdrumma
Well-Known Member
Here are some pictures for reference
A little damage to one of the fins
A little damage to one of the fins
turbovanman
I has boost, :O)
Nice, billet comp wheel, 10 blade turbine wheel. I would get that compressor wheel rebalanced, new seals etc, run it.
Its a 16 cm housing, a bit big but you can at least tune it out due to being a DS4.
Its a 16 cm housing, a bit big but you can at least tune it out due to being a DS4.
Jorge6.5
Well-Known Member
16cm2 turbine housing is not bad at all. Should still work nicley with stock tuning assuming he's got 4:10 gears.
Run a 3 bar MAP sensor till you get a tuned ECM, this way you won't defuel. About 18 psi is more then enough
Run a 3 bar MAP sensor till you get a tuned ECM, this way you won't defuel. About 18 psi is more then enough
pacificdrumma
Well-Known Member
Ive got 3.73's. Jorge, tell me more about this 3 bar map sensor.
turbovanman
I has boost, :O)
It tricks the computer so it doesn't see that your "overboosting" and won't go into limp mode above 10 psi or around there.
turbonator
Member
no hx 40 came with a wheel below 58mm, we ran the same turbo as that one with a cranked .310" IP, anything under 1700 rpm was smokey and laggy with the 16cm2, although we work with our truck... maybe for someone with a play toy it might be good.... keep in mind the guys running the cko40w are still running a 35/40 hybrid, a 35 turbine wheel with the 40 compressor and 16cm2 turbine housing, easier to spool up, a true 40 has the bigger, heavier turbine and takes more drive to spin it up.....
pacificdrumma
Well-Known Member
Jorge, I thought the limp mode was caused by high intake air temps, not boost levels.
Jorge6.5
Well-Known Member
Both can cause the ECM to go into limp mode. The 3 bar MAP sensor is identical in appearance as the stock 2 bar map sensor located on top of the intake manifold. Just search for gm 3 bar map sensor. I got one from eBay and it worked great.