I got a turbo from @CSM and I went ahead and got it pulled down to rebuild it. While its apart I figure I would measure out the turbine and compressor wheels. Here is what I got. 

 

Compressor 

Inducer 60mm

Exducer 83mm

 

Turbine

Exducer 60mm

Inducer 69mm

 

From what I found online this is a HX40 compressor wheel. The HX35W is 56mm compressor wheel. So this should be a rather nice boost (pun intended). Waiting for my bearing kit to come.

Edited April 6, 20177 yr by Mopar1973Man

@Cowboy  vgt lalala  

7 minutes ago, Me78569 said:

@Cowboy  vgt lalala  

You've got studs and springs. I think it's time for you to step up to VGT compounds!   We could build the piping and support bracket easliy. 

i'll let you tell my wife why I need a new trans  

4 minutes ago, Me78569 said:

i'll let you tell my wife why I need a new trans  

I've got an nv4500 sitting in the shop waiting for a new owner! Just needs a countershaft, gear, and bearings....

3 hours ago, Me78569 said:

i'll let you tell my wife why I need a new trans  

 

I'm taking donations for a trans in the 12v. 

Can someone help me out...

 

Are all turbo sizes based on the inducer measurement? ie: a 62/65/12 and a 62/74/14 are both considered 62mm turbos?

23 minutes ago, notlimah said:

Can someone help me out...

 

Are all turbo sizes based on the inducer measurement? ie: a 62/65/12 and a 62/74/14 are both considered 62mm turbos?

65mm turbine vs 74mm turbine on the exhaust side. Then the exhaust housing going from 12cm2 to 14cm2. So, the second turbo would Have more lag.

49 minutes ago, Mopar1973Man said:

65mm turbine vs 74mm turbine on the exhaust side. Then the exhaust housing going from 12cm2 to 14cm2. So, the second turbo would Have more lag.

 

Yea but are they still both considered a 62mm turbo?

Yes they would both be 62 mm turbos.  

Correct, there is a lot more to a turbo size than their in/ex numbers but its a good ball park. 

Thanks. I'm understanding the turbo sizing a little better now.

And then we get into turbine design. Compressor cover design with changes in diffuser. Goes down hill quickly lol

8 minutes ago, jlbayes said:

And then we get into turbine design. Compressor cover design with changes in diffuser. Goes down hill quickly lol

 

So why don't we discuss this so someone might create and article about turbos? 

I do not know enough about it to do that. Just some stuff that comes up when Weston texts me.

Heck any information  about turbos would be a bonus for the site.

Aight, I'll start putting something minor together. I haven't seen it on here but do you know if anyone has pulled the basic info on sizes from one of the other forums?

Don't think so.  

 

@Cowboy  would be the one to ask

I'm impressed with the minor change in how the turbo runs. Highway cruise boost pressure is down I'm like 2-5 PSI at 65 MPH and now with the +75HP injectors my EGT's have dropped a good 100*F so 65 MPH I'm floating 500-600*F. Max boost I was able to bang out this turbo so far was right around 47 PSI with my old Quadzilla tunning for the stock injectors but it was way hot and smoky.

5 minutes ago, Mopar1973Man said:

I'm impressed with the minor change in how the turbo runs. Highway cruise boost pressure is down I'm like 2-5 PSI at 65 MPH and now with the +75HP injectors my EGT's have dropped a good 100*F so 65 MPH I'm floating 500-600*F. Max boost I was able to bang out this turbo so far was right around 47 PSI with my old Quadzilla tunning for the stock injectors but it was way hot and smoky.

 

Those are good numbers!!

 

How does the pop pressure compare to stock?

 

47 psi with timing and stock head bolts??? I'd dial it back or plan on studs asap. With the change in turbine the 47 psi now could be the same as 50+ on the stock turbo. 

5 minutes ago, AH64ID said:

How does the pop pressure compare to stock?

300 bar vs. 310bar (stock)

 

5 minutes ago, AH64ID said:

I'd dial it back or plan on studs asap.

Already done in my tuning. I'm max boost is now like 37-40 PSI I cut my maximum fueling off by about 10% and made it long shallow curve for towards the max fueling. Again majority of my travels are mellow cruise control 2-5 PSI. Very Very rare do I run hard on it. I need reliability more that racing performance.

 

Again... I've got to travel 4,000 some odd miles every month. Not about racing... Just about getting there on the cheap fuel wise.