[DR. EVIL]

Please enlighten me and tell me why these seemingly same turbos have over $300 difference in price.
Blouch Turbo Inc. - TD05H - 18G- 7CM2 add in the 8cm housing.
www.speedelement.com - MHI TD05H 18G 8cm2 Turbo: Subaru
Does it have to do with the turbine in the Blouch? Would I need the water line on the speedelement Turbo?
How does this compare? Blouch Turbo Inc. - TD05H EVO III BIG 16G - 7CM2
Looking for Max 300whp, but with fast spool for daily in town driving. I hate to Max out a smaller Turbo as opposed to getting the same power with lower boost on a bigger Turbo.

 

[DR. EVIL]

No one able to weigh in on this?

 

[DR. EVIL]

If you are going 7cm I would get the EVOIII, but if you upgrade to the 8cm hotside then 18g all the way.

I think the 18g blouch I listed is the same that Integrity Performance really likes and I'm leaning towards that Turbo, but why is it so much more then the 18g from speedelement?

 

[DR. EVIL]

The speedelement Turbo doesn't mention the TD06 compressor wheel or housing the Blouch has, suppose that's where the difference is?
Is there anyone that sells the 16g with the 8cm2?

 

[DR. EVIL]

.

 

[DR. EVIL]

To answer your original question; yes the big difference is the TD06 compressor housing. 18g's in TD05 housings just don't flow as well. The large majority of 18g's out there, and based on the speedelement pictures, take a 16g setup, pull it apart and shove the 18g wheel in there. It's like putting a bigger person on the same size straw to suck through. Sure, you may get some more air, but you're still choking them off.

On another note, blouch seems to have a pretty good history w/ their turbos except for the few issues w/ the DOM3 turbo's came out. If you're dropping $800+ on something that is somewhat of a pain to install, you don't want to be doing it a second time...

That's the basic rule I tried to follow with my 87 Grand National too, but $1200 for a Turbo is going to take more time to buy, but at least I have time before the weather warms up. And its a tried and true Turbo. Any harder to tune a 18g then say a vf39? Can I safely get 300whp out of stock injectors and a walbro 255?

 

[DR. EVIL]

300whp is possible on any of the turbos you have listed. Its just a matter of how easy you want to make it and how much hot air you want to push.

I like the results I see on the 68HTA, but I have yet to see a compressor map, which keeps me from jumping on the bandwagon. The e316g and 18g 8cm have been proven to be great turbos, and I lean toward using proven solutions given my small budget...

Is it reasonable to think Ill get 300whp tuned on stock injectors, walbro 255, 18g 8cm, sti tmic and 3" catless Turbo back exhaust? I know with more fuel you can Max the Turbo out but I don't want to run very high boost and keep to 93 octane.

 

[DR. EVIL]

I figured the stock injectors would be good up to 300 with the walbro. Guess ill still get same power as a vf39 on lower boost though. I might look into some injector prices.

 

[DR. EVIL]

seems on average reading dynos stock injectors will get you about 285 whp. My last tune with the vf43 netted this, the tuner said with more injector he could have run it up a bit more.

That's still an excellent number. You have a stock fuel pump?
I think I have 550cc injectors, what's the next step up, 650? Man the 18g keeps sounding more expensive.

 

[DR. EVIL]

Maybe Ill look into 740s down the road, but I think the power I can get from the stockers and a fuel pump will suffice and I can spend money towards a rear sway bar and swift springs .
At best I'm at 250whp now so there's still a lot of power to be had on these injectors still. I want the wider power band of the 18g rather then the peaky drop off of the td04.

 

[DR. EVIL]

would a used vf52 be a worthwhile upgrade if I can find one for $600-800? Would save me roughly $500 over a Blouch 18g.

 

[DR. EVIL]

WAAAAAAAAAAAAY too much to spend on a VFXX anything, might as well get a small 16g brand new from Blouch and it will outperfrom the VF52 at all RPM's.

What would the power range be on a Evo III 16g w/ 8cm2? I'd imagine even that would save me $300-400. Assuming Blouch would make it if I called them up.

 

[DR. EVIL]

Where are you buying the Blouch 18g from?? I got mine brand new for $1k.

The Blouch website has the TD05 18G 8cm2 for $1195.
Blouch Turbo Inc. - Our performance turbo upgrades and rebuilds plus $100 for the 8cm2 housing

 

[DR. EVIL]

Well considering that the EVOIII is a 39lb/min wheel and the 18g is a 40lb/min the results would be nearly the same.

Hmm, for the price of the 18g I could get that Evo III16g 8cm2 and a Cobb rsb... wonder why there aren't more xt's with that Turbo combo?

 

[DR. EVIL]

We have some pretty influential members that really praise the 18g 8cm.

Don't get me wrong, I don't doubt the performance of the 18g 8cm2, I just wouldn't mind getting very similar performance and save $200 in the process if possible.

 

[DR. EVIL]

Its a difficult decision but I think I will buy new for sure, so its a matter of which Blouch to buy. I still don't know if I want to spend $1200 for the 18g....

 

[DR. EVIL]

I'm under the impression that vf22s are hard to find.
Although its a different car, my 87 Grand National with drag radials, catback exhaust, and 109 octane tune (stock drivetrain and suspension) ran consistant 12.7s at 101-103mph. I think your trap could be good for mid 12s on a better 60 foot time. I had high 1.7s usually.
Back on topic, 285whp would be fine with your 333wtq! I've heard that's one of the better vf turbos.

 

[DR. EVIL]

I babied my launches - drop the clutch at 3500 - 1.9 60ft to get that time. 300UTOG tires (NITTO 555 Extreme) It was 104mph btw, not 107mph.

Here's a recent vf22 for sale. I bought mine in person and was able to inspect before purchasing. I would suggest you do the same if you buy used. I then ported it myself before installing.

FS: STi VF22 turbo no shaft play! - NASIOC

We'll see in a month what's available, $415 shipped isn't bad. That might be the only way I'd go over a new 16g for $650. Suppose its possible an Evo III 16g could show up used too. Integrity Performance had a 18g 8cm2 and upgraded, so you never know what will be out there next month when I'm close to ready to buy. Could be worse, at least there are choices lol.

 

[DR. EVIL]

Just thought I'd post a link to this wrx wagon with a (I believe) a 2.2l Turbo motor. He's using the td05 Evo III 16g 8cm2 I mentioned. On modified stock injectors and a walbro 255. I didn't read it all but looked like he was close to 300whp on 92 octane. I get 93 here.
FuJi's GF8F5SD - RS25.com: Subaru Impreza GC8 & RS Forum & Community
Not a straight comparison but first Subaru post with that Turbo and hot side I've found.

 

[DR. EVIL]

He expected 320whp if it weren't a Mustang dyno. Not sure if he has quarter mile MPH to get a better power estimate.
He has a lot of non power mods and a smaller motor right?