Just want to get some opinions on using an HX35 off of a cummins diesel. They seem to be around the right size range. Anyone tried one on our cars? Im looking to make 375-400whp, but i cant find maps for these.

 

95turbo gxe is using one. it's a good sized turbo for what you want based upon what I've seen on maps that are supposedly of the HX35. I say supposedly because holset doesn't release the maps to the public, but I've seen a couple that people got ahold of that are supposed to be HX35s, and it's pretty similar to a GT3582R map.

 

What about the HY35? Same?

 

The cummins website says the HX35 is for 5.0 - 6.5 liter motors and the HX30 is for up to 5 liters. You think that applys to diesel motors that won't be revving as high?

 

The HY35 is smaller than the HX35. HY35 supports up to 400hp or so, HX35 for about 450hp. There's a really good discussion of them here

http://www.z31performance.com/forum/...st=0&sk=t&sd=a

This is as it applies to the z31 300zx but there's a lot of discussion about the turbos themselves. Hope it helps you out.

 

Cool, good info guys. Im watching a few HX35's on ebay so i'll let you all know if i snag one at a decent price. Basically if i cant get one by mid November im resorting to a cheap ebay one(yes i know i'll blow the car up, thats the point), then when the motor goes i've already got a 3.5 lined up for a REAL turbo.

 

Im running the holset hx35 with the standard 12cm exhaust housing. I cant realy say to much on spool up because my external wastgate is leaking but in 2nd gear it will come on at 2500 with a full psi. Its is a power house for a turbo. their are guys with 2.0 dsm running over 500whp with the hx35. just do a search on the web for hx35 you will see.
I know I seen one on a sr20det making 400whp on a hx35 at ,and making full boost of 20psi by 4000. Now compare the motors and take th sr20 in N/a form of horsepower compared to vq30 in the na form. The vq30 at 20psi should be at or over 500whp just my guess

 

On a bit of a side note, im looking for a turbo timer and boost controller. Anyone know if there is an all in one unit, im running out of din in my center console, haha. As it is the top din is for the radio, middle din is gauges and bottom can fit a timer or boost controller. The dash is taken for a custom radar detector fiberglass enclosure.

 

Dont know if this is accurate but found it while doing a bit of research on this hx35 device lol

 

Thanks streetz. I found this boost controller called BCU+. For like 200 bux it also has the turbo timer and boost gauge read out. Im gunna try that, i wanted something electronic so i have gain and in car adjustability. Now all i need is some charge pipe and injectors, which i mights have a question on later, but that'll be a different topic.

 

thats the map I found too when I googled "hx35 map" that they said was supposedly an HX35, but they weren't 100% sure. It looks plausible to me though based on what I've heard about that turbo.

btw the guy who owns the building I work in just sold the low mile HX35 off of his dodge pickup for $200. I asked him about it because of your thread and I knew you were looking for one.

 

95blkmax and I compared that graph to a gt35 one, and holy crap they are very very close to each other. I would be in 78% Efficiency at 10psi with hx35. hmmmmmm turbo upgrade?? lol

 

hmmm, I wonder how this device would like bigger cams with 25* of overlap??? . W/e, may not be as great as with stock-ish overlap, but it'll add power for sure.... Dont mind me, im just thinkin out loud :-D

Wow this thing is amazingly close to the GT35's flow characteristics..... for basically 1/3 of the price!

 

Does this mean I can get my T04 back :lolz:?

Hey we're gonna have to go hunting in the junkyards for some cummins motors :-D

 

remember that comparable maps doesn't mean the whole turbocharger assembly is comparable though, it just means the compressor wheel compresses air in a similar manner. GT3582R is ball bearing, water cooled, available with a wide variety of turbine housing options (size, T3 or T4, divided or single, etc), has a different (not saying better or worse) turbine wheel, etc. it's also way more expensive of course.

 

Im with ya on that, just because its similar doesnt mean it will spool the same amount of air at the same rpms with the same efficiency, but then again not all of us have the money for a gt35 so shortcuts have to be made.

Real quick, im torn about what size injectors to get, I see DW offers everything from 270-740cc, i was originally set on 370's for this build but some people say its not enough fuel for 400hp or slightly above that. 440's seem like they would work but if i put them in before the turbo i dont think i can correct the fuel that much to run them without the turbo. BTW, im using NEO to control A/f.
So
a) is 370cc enough?
b) can 440's be tuned down enough on stock MAF and NEO?

 

a) enough for what, 400hp (flywheel horsepower)? not with stock fuel pressure. You'd have to turn up your fuel pressure a bit (not sure how much, it's not something I recommend and it's something I never bothered to look into). More fuel pressure and higher IDCs means more likelyhood of injector failure and a blown motor. My opinion is that it's better to have properly sized injectors rather than using bandaids like cranked up fuel pressure.

b) no idea, but if you want 400 flywheel horsepower you're not going to be able to run the stock maf anyways.

I'm assuming you're meaning 400 crank/flywheel horsepower and not wheel horsepower. If you mean wheel horsepower, that changes the entire game considerably.

 

Hmm, probably 400 to the wheels, after all you cant say you have 400 horses unless thats whats hitting the ground. So are you say i'd need even bigger injectors(550's) to turn 400whp? The reason i ask is because it seems like theres a few people here who run 370's and are boosting pretty impressive numbers.

 

need - no, you can go raise your fuel pressure if you want. I wouldn't recommend anything less than 440cc injectors though. personally I wouldn't run anything less than 500cc injectors for 400whp.

You're never going to make 400whp with just an SAFC/neo. you'd be blowing headgaskets and cracking ring lands every 2 days without any timing control.


you need to be aware that at that sort of power level you're going to be breaking transmissions, needing better engine management than SAFC, etc - that's what I meant when I said the game would be changing considerably, I didn't realize you were shooting that high (even though now I see that it says that in your original post, I was thinking you were looking for more like low 300s whp range).

 

are there certain hx35 or even hx40 that are not internally wastegated? or is it removable with no ill affects? I see some with no wastegate and some with.

 

Yeh the hx35w is internally wastegated, if theres no "w" on the end than its not.

 

I maxed the stock maf out with only 8-10psi from this turbo at about 5000 rpms Im not sure what it would be like at 7000rpms never went that far after I seen the voltage at 4.95 at the 5000 area!
Im know where near dynoing because of the cut out problem im having but If I start in 3rd at 2000 rpms by the time I get to 4500 my tires will rip loose at 12.5 psi of boost (street tires) This is all done on a dek with a hx35

 

same here, I maxed mine out at 10psi. Make yourself a 3" maf. works great. i think the highest voltage iv seen is about 4.40v

 

Is that with A z32 maf or the stock one in a 3inch pipe?
Iv seen at 14psi from the hx35 and read about 4.68v at about 6200rpms from the z32 maf. I wonder what type of whp im near?

 

thats with the stock sensor inside a 3" pipe

 

I'm not positive, but I believe that the z32 maf will max out around 550 hp. I don't remember if that's chp or whp.

How does that hx35 spool on your vq30? What rpm does it make full boost (14psi, 18psi)?? I've asked you in one of your other threads already without a reply. The reason I'm asking, is because I'm thinking about getting one for my vq30det. I mapped it out with the map in this thread and it seems perfect for my det @ 20psi and a redline of 7.5k-8k.

 

You should have full 14 or 18psi bt 3800-4000rmps