hy35 an upgrade?

[Wood]

dads upgrading the turbo on his cummins. its the baby hy35. would this be an improvement over my banks turbo? ie worth the work/fabrication?

if not ill just get an hx35.

 

[tanman_2006]

Get a bigger turbo from mel or hx40 16cm turbo.

 

[Wood]

hx 40 seems awfully big and w/ a smaller shaft, these came off of 8.3 c cummins.

 

[tanman_2006]

The 7.3/6.9L flows more air than a cummins. More cube's pumping, I can over spin a hx 35 on my 6.5L so IMO it is way undersized for a 7.3L. I have run a 18cm hx 40 and it choked out at 3800 rpm, i know yall dont spin 7.3's that tight so you could probably deal with 16cm T4 mount. The engine I test on spins to 5,200 rpm and is balanced well above that, I could feel the wastegate open and drop my power down the toilet.

 

[Wood]

gotcha, that makes sense, thanks for the input. im just looking for an upgrade over my banks turbo. this hy35 would be free.

ive found 40s for like 300 bucks. if its that much better ill take that risk. lol

 

[tanman_2006]

The banks turbo isnt that bad imo, the hy would give you more snap off the line but you will choke out at higher rpm's. The banks is built for engines that run w/o overdrive, it gives power at higher rpms and w/ proper timing it keeps power in the bottom end.

 

[tbirdfiend281]

why not throw it in the system, and get yourself two turbos? The hy for down low, the banks for up high. Free is free.

 

[88 Ford]

why not throw it in the system, and get yourself two turbos? The hy for down low, the banks for up high. Free is free.

Both of those turbos are too small in a setup like that. The Banks would probably work as a small turbo but you need a bigger turbo for the atmosphere turbo. A setup like you spoke of, you probably would actually lose some power. A good set of twins though that are properly sized would give you good low end and top end power.

 

[jaluhn83]

HX35 works fine. I'm making ~15 psi and that's with a pretty good exhaust leak. I can burn all the fuel a full moose pump will put out. HX40 seems like it'd be too big unless you're really trying for crazy boost and have a built engine to match.

The HY35 may be a bit small - it's the same intake side but a smaller A/R and turbine, so you'll get high backpressure.

The tubine inlet flange is the same between a HX35 & banks, and the outlet is similar in type and location to the banks wg turbo (not remotely close to the not wg) but about 1/4" smaller is diameter so I don't think a stock downpipe would fit right. I wound up welding the downpipe directly to the outlet cover and just removing the 5 bolts that hold it to the turbine housing to remove the downpipe, but not sure if this would work with a stock downpipe.

The oil drain flange is the same between banks wg & HX35, oil inlet is not. Banks is 1/4 NPT, HX35 is a banjo bolt so you need an adapter.

The intake side housing is about 1" bigger in diameter and the inlet is 4", not 3" as on the Banks wg. The compressor outlet is a v-band style - a 2 1/2" rubber hose will work instead. Banks wg takes a 2" hose.

The HX35 wastegate actuator will probably also cause you problem in the stock location.

So it's not a plug and play swap, but is not a huge difference.

 

[Wood]

HX35 works fine. I'm making ~15 psi and that's with a pretty good exhaust leak. I can burn all the fuel a full moose pump will put out. HX40 seems like it'd be too big unless you're really trying for crazy boost and have a built engine to match.

The HY35 may be a bit small - it's the same intake side but a smaller A/R and turbine, so you'll get high backpressure.

The tubine inlet flange is the same between a HX35 & banks, and the outlet is similar in type and location to the banks wg turbo (not remotely close to the not wg) but about 1/4" smaller is diameter so I don't think a stock downpipe would fit right. I wound up welding the downpipe directly to the outlet cover and just removing the 5 bolts that hold it to the turbine housing to remove the downpipe, but not sure if this would work with a stock downpipe.

The oil drain flange is the same between banks wg & HX35, oil inlet is not. Banks is 1/4 NPT, HX35 is a banjo bolt so you need an adapter.

The intake side housing is about 1" bigger in diameter and the inlet is 4", not 3" as on the Banks wg. The compressor outlet is a v-band style - a 2 1/2" rubber hose will work instead. Banks wg takes a 2" hose.

The HX35 wastegate actuator will probably also cause you problem in the stock location.

So it's not a plug and play swap, but is not a huge difference.

thank you very much my friend. very very informative post there. lots of pertaining information. this swap doesnt seem out of my realm of fabrication skills. are you happy with the moose pump/hx35 setup? what do you do with it? im just looking to tow efficiently and strong up long hills. seems like my banks lets things heat up quickly. i plan on putting an intercooler in when i put the new motor/turbo in.

thank you again for your input, i value that information highly. lol.

 

[88 Ford]

thank you very much my friend. very very informative post there. lots of pertaining information. this swap doesnt seem out of my realm of fabrication skills. are you happy with the moose pump/hx35 setup? what do you do with it? im just looking to tow efficiently and strong up long hills. seems like my banks lets things heat up quickly. i plan on putting an intercooler in when i put the new motor/turbo in.

thank you again for your input, i value that information highly. lol.

The Hx35 seems to be a very good option for the idi. Hairyboxnoogle over at FTE has one on his truck and it has worked pretty well for him too. He has a thread on it over there if you are interested Wood. His thoughts on top of Jaluhn's should give you a good idea.

 

[tanman_2006]

I guess a 6.5l idi is too much of a beast to compare to a 7.3l lol

 

[jaluhn83]

thank you very much my friend. very very informative post there. lots of pertaining information. this swap doesnt seem out of my realm of fabrication skills. are you happy with the moose pump/hx35 setup? what do you do with it? im just looking to tow efficiently and strong up long hills. seems like my banks lets things heat up quickly. i plan on putting an intercooler in when i put the new motor/turbo in.

thank you again for your input, i value that information highly. lol.

I think I'm going to just start an HX35 info thread, but that's down the road when I have spare time...

Honestly I've only really driven this setup once - I just finally got it running again with the rebuild and new gear. I like it. I use it mainly for towing and as a general drive around truck. Most of the time I'm pulling a ~6000# horse trailer, so we're 12-13k gross.

I've got a homemade cobbled up turbo setup. Originally I had a banks non wg turbo, then banks wg and now this is revision 3. The wg turbo I had previously I think has the wrong exhaust housing and would not make as much boost as it should so I'm not sure my baseline is really accurate.

I had the pistons decked 0.015" and ceramic coated and I'm running studs. I'd be hesitant to run the 35 without both.

I am running an intercooler though it's not hooked up fully yet. (water to air cooler and the water side is not done).

I'm seeing about 15 psi boost and it runs well with the moose pump. No complaints yet.

On my test runs I was able to run 55-60 up a 5-6% grade with the trailer running 12-15 psi boost & 1150-1200 egt. I did have some temp issues but they seem to be due to the fan clutch failing rather than design problems.

I am also running a typ4 cam and just got a aluminum 3 row champion radiator.

If the banks is causing the motor to get hot you've probably got other issues that changing the turbo woln't help.

 

[84TD]

I have been wondering about the HY also. I am keeping an eye out for something that will bolt up in place of the ATS/Ford turbo on my truck and give me better driving around town low end boost. I think the HY has the same exhaust bolt pattern as the 093, the boost side outlet position doesn't mater much since I have an intercooler. In comparison to the stock ford turbos does anyone know if the hot side smaller or bigger?

 

[88 Ford]

You can pretty much bolt on anything that is a T3 turbine housing. One problem could be the size of the housing in a cramped space though. My opinion is the only way a Hy35 could be used with an IDI would be in a parallel twins setup. The small turbine housings would help them spool fast and having two 56mm inducers could produce some power up top as well. The Hy35 has the same compressor as a Hx35 but the only thing holding it back from use on an IDI is the fact that the turbine side is so small. It would severely choke the engine and would cause some high egts.