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Old 01-30-2011, 02:42 PM   #1
Whoa!ShutItDown
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Default Blouch 18gXT housing size

My stock turbo is on its way out and I'm getting a Blouch 18gXT, DW 750cc, and TurboXS TMIC or FMIC. I know a 7cm housing will have quicker spool but the 8cm has more top end. I want quick spool but how much top end will a 7cm housing lose? I dyno'd 232whp and 245wtq @17psi at Innovative Tuning in October 2010. Im looking to break 300whp and have decent spool. Also, which TXS I/C would you recommend for my goals? Ill probably tell Mike that I dont want to go over 20psi if possible to get 300whp.

I have a stock 2.0 motor with the following:
Tomei 4-1 headers w/catless up pipe (all heat wrapped)
3 in catless bellmouth dp (heat wrapped)
3 inch cobb replica (ebay) cbe
Gimmick inlet w/samco maf tube
Cobb sri
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Last edited by Whoa!ShutItDown; 01-30-2011 at 02:49 PM.
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Old 01-30-2011, 08:07 PM   #2
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turn up the boost + e85?
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Old 01-30-2011, 08:44 PM   #3
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Quote:
Originally Posted by Whoa!ShutItDown
My stock turbo is on its way out and I'm getting a Blouch 18gXT, DW 750cc, and TurboXS TMIC or FMIC. I know a 7cm housing will have quicker spool but the 8cm has more top end. I want quick spool but how much top end will a 7cm housing lose? I dyno'd 232whp and 245wtq @17psi at Innovative Tuning in October 2010. Im looking to break 300whp and have decent spool. Also, which TXS I/C would you recommend for my goals? Ill probably tell Mike that I dont want to go over 20psi if possible to get 300whp.

I have a stock 2.0 motor with the following:
Tomei 4-1 headers w/catless up pipe (all heat wrapped)
3 in catless bellmouth dp (heat wrapped)
3 inch cobb replica (ebay) cbe
Gimmick inlet w/samco maf tube
Cobb sri
tgv deletes
Grimmspeed EBCS
Walbro 255
Perrin crank pulley
20lbs and a tmic will do the job of ~300whp with a not so aggressive tune.
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Old 01-30-2011, 09:04 PM   #4
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and the clutch will go, next....followed almost immediately by the transmission
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Old 01-30-2011, 11:11 PM   #5
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Quote:
Originally Posted by Uncle Scotty View Post
and the clutch will go, next....followed almost immediately by the transmission
I know an 18g is really pushing the stock tranny, would you recommend an hta68 as a safer choice? Ive been trying to decide between the 18g or hta68 for awhile. I might end up with the hta68 pnp'd, TXS top mount, and DW 750cc's and be done with power mods. Im at 90k, clutch was replaced with another OEM Exedy at 80k, but I still plan on upgrading.
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Old 01-31-2011, 12:26 AM   #6
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Quote:
Originally Posted by Whoa!ShutItDown View Post
I know an 18g is really pushing the stock tranny, would you recommend an hta68 as a safer choice? Ive been trying to decide between the 18g or hta68 for awhile. I might end up with the hta68 pnp'd, TXS top mount, and DW 750cc's and be done with power mods. Im at 90k, clutch was replaced with another OEM Exedy at 80k, but I still plan on upgrading.
id go with the hta68

beware wanting too much outa a wrx...there are way too many getting broken by owners who want too much and end up regretting it

I had a 16g on my 02 wrx and it was a great turbo.....the evoIII i6g would be my choice, I think...or the hta68..for a dd 2.0


and NEVER 'dump' the clutch
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Old 01-31-2011, 02:33 PM   #7
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i've got a 20g 8cm pushing 20lbs of boost, i had to get a new clutch but the tranny is holding fine. just dont beat the crap out of the car and dump the clutch every chance you get. i'm pushing 323 to the wheels. i would personally get the 18g 8cm and go external wastegate.

Last edited by Ammata; 01-31-2011 at 02:39 PM.
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Old 02-01-2011, 06:36 PM   #8
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I know it is possible to have big turbo's on the 5mt, but I cant really risk that. And I dumped the clutch once at 4 or 5k while the car was stock...hardest stall I have ever experienced. It knocked a brake pad loose and was enough to scare me off from doing that ever again. Im going to go with the hta68 since the TD04 is almost enough for me.
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Old 02-01-2011, 07:29 PM   #9
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The HTA68 or 18 are no worse or better for your tranny. Both can be tuned to tranny destroying torque levels, its up to you to decide when to put that down. I ran an 18G for 2 years on a head/cam hybrid putting 360ft-lbs with about 15 and hard as I can tranny breaking launches without failure. I may have been lucky but people tend to forget that YOU have control of your right foot and when to use it.
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Old 02-02-2011, 08:21 PM   #10
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I'd still like to know what the 2.0 guys think in regards to either the 18g-xt w/ 7 or 8cm hot side. Is there a noticeable difference between the two in the powerband?
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Old 02-02-2011, 09:01 PM   #11
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Depends what u use car for, 8cm track the car; 7cm a bit faster spool not much of a difference maybe 10-15 torque difference
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Old 02-03-2011, 12:09 PM   #12
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16gxt
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Old 04-07-2011, 09:27 PM   #13
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Im in the same boat, my blouch 18gxt will be here next week. Im running the 8cm opposed to the 10cm. If my motor goes ill be going hybrid and switching to a 10cm. Im will be running...
Fujita cai
Gimmick turbo inlett
Tgv Deletes
Sti TMIC
HKS super suquential bov (atmospheric)
Nvidia uppipe (heat wrapped)
4" Turbo xs catless turbo back (heat wrapped)
Grimspeed EBCS
750cc Deatschwerks top feed
Blouch 18gxt 8cm
Walbro 255
HD street disc Act clutch and light weight flywheel
Hawk pads with slotted rotors+stainless lines
F&R Cobb adjustable sways w/ Kartboy endlinks
Tein springs
Sti seats F&R
and...currently dreaming of a built ppg 5spd
She's getting tuned by Doug at Topspeed on the 17th so ill let ya know how it turns out.
Also im right there with ya on the high miles 108,000
Im planning on having it tuned to 17 -18 psi for dd and 20 for weekend use
They were thinking id easily be up around 310whp on the high boost, but we will see!
Good luck
P.S. Anyone know why they told me not to bother with a ewg? Thought that was the thing to do with this turbo on a 8cm??
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Old 04-13-2011, 01:35 PM   #14
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i have a similar set up and was told i needed 850cc plus injectors. just a thought
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Old 04-13-2011, 07:49 PM   #15
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I have no experience with the 7cm, because i got an 8cm ) I get 20psi at 4k and it holds it all the way to redline. I made 315whp and 280wtq on a mustang dyno. My tuner said it would easily keep making power, but i cut it off there. I just placed an order for a v8 ej207 and a 6 speed. We'll see what this turbo can really do!


One more thing. Uncle Scotty is a pecemistic old douch bag who is angry at anyone who can still produce an erection. He continualy post garbage that does not pertain to the topic at hand.
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Old 04-13-2011, 09:16 PM   #16
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Quote:
Originally Posted by jchafee View Post
I have no experience with the 7cm, because i got an 8cm ) I get 20psi at 4k and it holds it all the way to redline. I made 315whp and 280wtq on a mustang dyno. My tuner said it would easily keep making power, but i cut it off there. I just placed an order for a v8 ej207 and a 6 speed. We'll see what this turbo can really do!


One more thing. Uncle Scotty is a pecemistic old douch bag who is angry at anyone who can still produce an erection. He continualy post garbage that does not pertain to the topic at hand.
and you are just a dumb **** little douchebag who thinks he's k00...but isnt

and when you can prove what I say is wrong, pop back and man up


and learn the **** how to spell ya ged maybe
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Old 04-13-2011, 09:18 PM   #17
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^lmfao @jchafee scotty is the ****..obviously u haven't been here long
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Old 04-13-2011, 09:47 PM   #18
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Tranny life depends on the tq produced. Scotty no one does 16gs anymore and the hta68 is an overrated paper weight. I have tuned 30rs on wrx's with stock transmissions and had zero issues. Treat it with respect and it will respect you back. Throw an hta68 with e85 at a stock trans and it will pop.

The 18gxt will put 330 all day long and more. With great spool even with the 8cm
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Old 04-14-2011, 06:51 AM   #19
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Quote:
Originally Posted by Uncle Scotty
and the clutch will go, next....followed almost immediately by the transmission
Ok dildo! Tell me where in the op did he ask, "will my clutch and tranny hold the power and 18g will make". Go ahead, defend yourself... Because at the end of the day what i said is true. I may not have been on this forum as long as some of you. But I've been around long enough to see that 98% of what you post is negative bull****. I have personal experience with a 2.0 a 5mt and an 18g. Get with the times old man... A lot of the failures come from the drivers, not the amount of power and tourqe.
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Old 04-14-2011, 09:52 AM   #20
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Flame wars are sweet, name calling is not. Use your big boy words to pwn someone not namecalling. If you want to name call, you folks can do so via PM or utilize the Ignore List here and you'll never see a post by that person again.
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Old 04-14-2011, 12:49 PM   #21
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Quote:
Originally Posted by jchafee View Post
. A lot of the failures come from the drivers, not the amount of power and tourqe.
wrong again, i've seen people do a pull in mid 3rd gear and it goes BAM gone
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Old 04-14-2011, 02:32 PM   #22
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Quote:
Originally Posted by blakkboxer

wrong again, i've seen people do a pull in mid 3rd gear and it goes BAM gone
Your right... Everything i say is wrong, evrything scotty says is right.
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Old 04-14-2011, 02:46 PM   #23
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Quote:
Originally Posted by blakkboxer View Post
wrong again, i've seen people do a pull in mid 3rd gear and it goes BAM gone
And all that means is the cumulative damage finally caused failure. Anything can be broken. You control how you use the go pedal.

Last edited by kellygnsd; 04-28-2011 at 03:31 PM.
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Old 04-28-2011, 09:53 AM   #24
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Quote:
Originally Posted by Uncle Scotty View Post
and you are just a dumb **** little douchebag who thinks he's k00...but isnt

and when you can prove what I say is wrong, pop back and man up


and learn the **** how to spell ya ged maybe


made me smile
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Old 04-28-2011, 03:20 PM   #25
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Quote:
Originally Posted by WRXJD View Post
Im in the same boat, my blouch 18gxt will be here next week. Im running the 8cm opposed to the 10cm. If my motor goes ill be going hybrid and switching to a 10cm. Im will be running...
Fujita cai
Gimmick turbo inlett
Tgv Deletes
Sti TMIC
HKS super suquential bov (atmospheric)
Nvidia uppipe (heat wrapped)
4" Turbo xs catless turbo back (heat wrapped)
Grimspeed EBCS
750cc Deatschwerks top feed
Blouch 18gxt 8cm
Walbro 255
HD street disc Act clutch and light weight flywheel
Hawk pads with slotted rotors+stainless lines
F&R Cobb adjustable sways w/ Kartboy endlinks
Tein springs
Sti seats F&R
and...currently dreaming of a built ppg 5spd
She's getting tuned by Doug at Topspeed on the 17th so ill let ya know how it turns out.
Also im right there with ya on the high miles 108,000
Im planning on having it tuned to 17 -18 psi for dd and 20 for weekend use
They were thinking id easily be up around 310whp on the high boost, but we will see!
Good luck
P.S. Anyone know why they told me not to bother with a ewg? Thought that was the thing to do with this turbo on a 8cm??
Any update?
I'm curious to see what the Blouch 18G-XT can do on Mike's dyno...
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