T3 vs. Mitsu housing

[At-Least-It's-An-Evo]

I swear every thread on here turns into this crap.

What crap, a thread full of false information? Yep. Only if there are people to provide it.

[Super Bleeder!!]

Whats the highest trap achieved with an hx35 on a dsm?

[jrohner]

Whats the highest trap achieved with an hx35 on a dsm?


Not sure yet, there is a results thread that people are starting to post, I haven't read through the whole 15916616465456565 pages of holset info. I've seen around 125-130mph so far. I do highly doubt all those pages are false information.

I wouldn't be thinking about switching to one if I could hold a few more psi with my 16g.

[JET]

I don't see how you can go by a dyno chart to tell you where full boost is. I make full boost by 2800 on my car, a hair over 3000 in 3rd gear, yet the dyno chart shows it at like 3800 and peak torque at 4200, both on the DD and Dynojet. The load is far different on a dyno than the street where it matters. The main chart I've seen on the HX35 had peak torque at 5 grand and made about 500 hp at about 7 grand at 25psi. It doesn't tell you where it makes full boost on the street, you have to go by what people say -- which is what I'm doing. This other guy is just saying 'I don't care what anyone says it's not possible' basically. Have you had one on your car or ridden with someone to really say it's not possible?

Besides, tune means a lot too, I can change my spool 400 rpms easy just using a different timing map. I was making full boost at 3200 and then I changed my timing and now I'm at 27-2800. It doesn't make a big difference what psi I'm running either, rpm is very close to the same.

Going on heresay is just BS. Yes a dyno spools later than the street, but you can still compare much better than some guys saying I spool mine at XXXX! If the dyno shows one turbo spools 500 rpm sooner than the other one, you will see a very similar difference on the street. That is the significance of the dyno chart. Tune is always going to matter, that is why you don't go off of just 1 dyno chart, but look at several. What gear you are in also makes a big difference.

[jrohner]

More boost doesn't always mean more hp. Some turbo's have less boost at a certain rpm but still give you more hp. Same goes for your setup and tune.

I remember reading an article in a magazine a few years back, I think it was about a galant vr4, where they put on a bigger turbo that made full boost at a higher rpm yet made more torque at that lower amount of boost. If all the air coming out of the turbo went directly into the cylinders, there wouldn't really be any boost pressure.

[At-Least-It's-An-Evo]

More boost doesn't always mean more hp. Some turbo's have less boost at a certain rpm but still give you more hp.

It's called efficiency and turbo sizing.

Dyno's like a Dyno Dynamics and some Mustang ones can simulate the street driving load and the spool can be very comparable on those dynos.

Dyno charts tell alot. So do Standalone logs.

[FattyBoomBatty]

I left a standalone log in the toilet this morning.

[User Name]

I left a standalone log in the toilet this morning.

Yes!!!

Oh and uh..Mitsu housing.

[wheelhop]

Wow! I expected this in June; not in November after this seasons results have been posted.

Ok. No heresay. My car, my turbo. H1C bolt-on housing 54mm compressor inducer and 84mm compressor exducer (50-trim/20g flow potential at better high boost efficiency), turbine wheel about the size of an t350 (t3 stage 5) turbine wheel. Fp2 cams with stock manifolds on a 2.0L motor: 28psi by 3600rpms. 20+ psi by 3400rpms. ON THE ROAD. My small 16g spooled the same with the same setup (http://www.dsmtuners.com/forums/turbo-system-tech/274459-holset-turbos-part-3-a-14.html#post151442325). The h1c has the hx35 turbine wheel with a slightly smaller compressor. The hx35 has a 56mm inducer.

Maglin, on dsmtuners, full boost (30psi) by 3600rpms with the hx35.

Same turbo has done 11.2@126mph (http://www.dsmtuners.com/forums/drag-strip/261561-new-times-holset-hx-35-a.html) with the same bolt-on housing at 28psi stock weight. These results at 28psi with no manifold upgrades and just 272s is not indicative of a turbine that is sacrificing flow for spool.

494whp @ 25psi (http://www.dsmtuners.com/forums/turbo-system-tech/145691-holset-turbos-9.html#post1355754). Typical boltons, including the bolton housing. No exhaust manifold upgrade. Considering the above trap speed this would be expected with 3psi less boost.

There's plenty more. If you really care, you'll look. If you don't, you won't call BS without proof yourself. But I do agree that the bep turbine housing is too small for poor flowing poor spooling garret T turbine wheels. And I do agree that the bolton housing is a choke to the later 60lb/min hx35 compressor wheel, of which has the same spool speed. The t3 bep turbine housing or the stock hx35 t3 turbine housing with the stock hx35 turbine wheel is proven to flow enough for 600whp (based on trap speeds not inconsistant dyno numbers) and spools to 20+ psi ON THE ROAD by 3900-4000rpms. When can a td06 20g spool to 20+ psi :) ?

[Kracka]

When can a td06 20g spool to 20+ psi :) ?
I was able to spool my 20G to 19psi by 3500 rpm. '94 Talon TSi fwd; stock 7-bolt 2.0L 4G63. It actually spooled faster than my ported/clipped Big 16G.