Debating throwing a 6 blade hx40 16cm w/g turbo that i have just laying around on my non ic cummins. Turbo came off of a 7.? liter volvo engine. It doesnt have the 4 inch vband like the 8.3 cummins hx40's do...its a 8 bolt flat flange but i can work around that! Any pros or cons on doin this swap? truck will have 3200 spring and all pump mods done before hx 40 install

 

dont hold me to this cause i'm not sure but i thought ive read on here that the ones off the volvos arent as strong.

 

Oh really?? Thats not good news..! Anybody else say this is true too?!? Seems to me ive heard that about the Volvo HX52...i have two of them on the shelf as well!

 

ive got a hx40 8 blade on my truck. i love it. i dont know much about the hx52 but if its a big honkin turbo it might be kinda hard to spool up. im not really sure though.

 

The 7 blade is the best one, but I don't know why. Maybe they run more efficiently, as I've noticed most all of the new turbos Holset have come out with are 7 bladed. I've heard that about the Volvo ones too, but a good turbo, (meaning little play) is a good turbo as far as I'm concerned. It's going to run better than the H1C, so you've not got much to loose.

 

I dont disagree KD93 since a 7 blade is prolly the best compromise between the high end flow performance of the six blade model and the superb flow of the 8 blade at lower spool speeds! I read that 7 & 8 blade models flow around 60lb/min and six bladed models flow 69lbs/min. The six blade i have was free so im not complainin, but i was curious if i was leaving a lil performance on the table at lower engine rpm considered my turbo is more about peak flow rather than mid range flow?!

 

I don't know where you've got things set at, but I think if you added more fuel and a dab of timing you'd spool up a bit quicker!

Thanks for the info on the differences in blade design, I didn't know that.

 

Yea, typically the more the blades, the better the flow down low, and of course less blades equals more peak flow. I try to study as much as possible before thowing parts on it (or in this case..turbos).. I can also tell that the hx52 flows around 88lbs/min close to the flow of the big Garrett GT42 turbo for anybody that runs these big Holsets. I love Holset turbos..get put thru alot of **** and still keep on truckin!

 

just be sure you tune it and not just dump lots of fuel in, i got mine where i romp on it smokes then clears to a haze until 15 psi the once the turbo lighs it clears up and this sewms to be where i have the compromise between controllable boost, decent egts and the most power, and at 32 psi pedel to the floor it has a little haze. i would do a little with the fuel pin to, either by buying one or grinding the stock one. M&H has good pins and so does dennyt. just my 2 cents

 

dont waste your time on one of the 6 blade hx40s from big rigs. been there done that. didnt take me long to figure out a real turbo is no comparison to one of those things at all. theyre really laggy too. i definitely dont have a fuel problem anywhere they just lag. a super hx40 is a decent turbo. but a 6 blade from the big trucks arent even worth toying with IMO