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Old 08-22-2013, 09:01 PM   #1
MonsterRSTI
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Default EJ207 v7 turbo upgrade help

Ok So i have read all the threads untill my eyes bleed, still have not found the answer I was looking for...

I want to upgrade my turbo. The car is not my daily driver, but I do like to drive it and I do not want to take away its driveability.

That said the car is ej207 v7 my current upgrades are...
ID 725 injectors
Hallman MBC
Cobb SF intake
3" turbo xs turbo back exhaust.
6 speed swap with functioning dccd.

I will probially want to race this car at auto x a little, I really just want a bullet proof street car that would put a ass woopin on any gm v8 that come in my area
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Old 08-22-2013, 09:48 PM   #2
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You'll need a hell of a turbo depending on your area's v8s you need to "ass whoop."

Unless you mean stock gm v8s. Then you can go smaller but "ass whooping" on stock gm v8s to me means 380awhp/bottom 12s/118mph traps at least.

So search for turbos powering cars at those levels and use that as your guide.
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Old 08-23-2013, 12:48 AM   #3
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twin scroll blouch 1.5xtr
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Old 08-23-2013, 02:14 PM   #4
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i'd go gtx3571ish
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Old 08-23-2013, 03:11 PM   #5
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Quote:
Originally Posted by murrdogg24 View Post
twin scroll blouch 1.5xtr
this would be my pick
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Old 08-23-2013, 07:57 PM   #6
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Really, with AVCS drivability is not a major concern, You don't lose nearly as much going big turbo on an EJ207 as on an EJ205.

Also people giving twin-scroll recommendations need to stop, v7 is single scroll.

Comfortable max on stock block is 24-25 psi (going above this outruns the stock MAP sensor, so you would lose overboost protection anyway).

I think that puts you in DOM2.5 - 3XTR territory for a comfortable max on pump for drag racing. Sky is the virtual limit for higher octane gas. GTX3071 rotated setup is reasonably similar to the Dom3. These have potential for ~400 WHP on pump, but meth is recommended at these boost levels. Spool will be 4500-ish on the street, but with AVCS and an 8k redline, a turbo like this doesn't feel as bad as that sounds.

Dom3:
http://forums.nasioc.com/forums/show....php?t=2220345
http://forums.nasioc.com/forums/show....php?t=1867946

Dom 1.5xtr is a better balanced turbo and will be better suited towards autocross, but obviously lower power potential. Here's a tune showing the spool difference between the stock turbo and Dom 1.5:
http://forums.nasioc.com/forums/show...6&postcount=64

Note he's only at 18psi in that tune. Full tune at 22-25 psi will have more HP, but you can still get an idea for how much response would be lost compared to the vf30. This size turbo is probably better targeted towards your current mods, but will have more trouble chasing down v8s.

Last edited by Concillian; 08-23-2013 at 08:06 PM.
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Old 08-24-2013, 10:30 AM   #7
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Concillian thanks for the info now were talking. my car has 281 with the vf so there is no way i would get the dom 1.5. is there any new turbos coming out
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Old 08-24-2013, 11:44 AM   #8
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That power on the 1.5 xtr is only because of the low boost. It's easily 330-350 whp on 93
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Old 08-24-2013, 02:48 PM   #9
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I vote for the 1.5xtr. Im running a TS 2.5xtr on my V8 EJ207 and its a great street turbo and spools nicely. If you weren't single scroll Id recommend that.
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Old 08-24-2013, 06:25 PM   #10
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Quote:
Originally Posted by Paul View Post
I vote for the 1.5xtr. Im running a TS 2.5xtr on my V8 EJ207 and its a great street turbo and spools nicely. If you weren't single scroll Id recommend that.
what exactually do you mean single scroll. ie my car wont accept a double scroll
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Old 08-24-2013, 06:26 PM   #11
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Quote:
Originally Posted by murrdogg24 View Post
twin scroll blouch 1.5xtr
This.

Or the single scroll version.
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Old 08-24-2013, 07:24 PM   #12
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Quote:
Originally Posted by MonsterRSTI View Post
what exactually do you mean single scroll. ie my car wont accept a double scroll
My car (V8 EJ207) comes with a twin scroll tubular header, uppipe and a turbo flanged for that setup. My uppipe consists of 2 pipes and they go straight into my turbo which helps spool the turbo faster.

Your car has a cast header and a single tube uppipe with a turbo flanged for that. Theres nothing wrong with single scroll but like I said twin scroll will spool faster. To switch to TS you would need header, uppipe, and downpipe. Kinugawa does make a twin scroll header and uppipe that can be had for about 600 but you'd still need to do something for the downpipe. So costs get high but it is a killer setup. The more I drive the car the more Im shocked with how it spools. Its very similar to the stock turbo just comes on alil later and
makes a lot more power

Quote:
Originally Posted by Psychoreo View Post
This.

Or the single scroll version.
I would disagree with the 1.5 xtr TS version and would say to go with the 2.5xtr. Seems like my TS 2.5xtr 207 setup spools just like a SS 1.5xtr from the results I've seen

Last edited by Paul; 08-24-2013 at 07:43 PM.
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Old 08-25-2013, 01:30 PM   #13
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Quote:
Originally Posted by 666stars View Post
That power on the 1.5 xtr is only because of the low boost. It's easily 330-350 whp on 93
The boost and the dyno. There's a comparison to a vf30 right there. You can see right there what the +HP is.... at 18psi... so add another 30-40ish for 22-24psi.
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Old 08-25-2013, 02:00 PM   #14
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Quote:
Originally Posted by Paul View Post

My car (V8 EJ207) comes with a twin scroll tubular header, uppipe and a turbo flanged for that setup. My uppipe consists of 2 pipes and they go straight into my turbo which helps spool the turbo faster.

Your car has a cast header and a single tube uppipe with a turbo flanged for that. Theres nothing wrong with single scroll but like I said twin scroll will spool faster. To switch to TS you would need header, uppipe, and downpipe. Kinugawa does make a twin scroll header and uppipe that can be had for about 600 but you'd still need to do something for the downpipe. So costs get high but it is a killer setup. The more I drive the car the more Im shocked with how it spools. Its very similar to the stock turbo just comes on alil later and
makes a lot more power

I would disagree with the 1.5 xtr TS version and would say to go with the 2.5xtr. Seems like my TS 2.5xtr 207 setup spools just like a SS 1.5xtr from the results I've seen
I'd be perfectly happy with these results

http://forums.nasioc.com/forums/show....php?t=2510645

Out of my ej207 and a 1.5xtr
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Old 08-25-2013, 09:35 PM   #15
MonsterRSTI
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Im liking the blouch 1.5 more and more.....
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Old 08-25-2013, 11:44 PM   #16
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Quote:
Originally Posted by Psychoreo View Post
I'd be perfectly happy with these results

http://forums.nasioc.com/forums/show....php?t=2510645

Out of my ej207 and a 1.5xtr
As would everyone else. But you can't expect those results considering its a shops owner personal car that he admittedly push on pump. Id say those are conservative E85 numbers. Either way the 1.5xtr SS is a sick street setup and not many people would argue with that. If your running the TS parts already, I highly suggest you step up to the 2.5, since I think it spools very similar to the 1.5 SS counter part.


Looks like the OP knows what he wants tho...now get it done!
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Old 08-26-2013, 01:06 AM   #17
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I think i just may do that
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Old 08-26-2013, 10:12 AM   #18
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Quote:
Originally Posted by Paul View Post

As would everyone else. But you can't expect those results considering its a shops owner personal car that he admittedly push on pump. Id say those are conservative E85 numbers. Either way the 1.5xtr SS is a sick street setup and not many people would argue with that. If your running the TS parts already, I highly suggest you step up to the 2.5, since I think it spools very similar to the 1.5 SS counter part.

Looks like the OP knows what he wants tho...now get it done!
You have any comparisons between the 1.5 + 2.5? I'm being lazy and don't feel like searching.

I talked to Matt for a while at WBM and on facebook. He didn't give any indication that it was a balls to the walls, this car may explode at any minute, type of tune. But it's possible I missed sonething.
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Old 08-26-2013, 11:42 AM   #19
Paul
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Might not be balls to walls but def not conservative. He's running 25psi and in that thread said he pushed the timing.

No comparison threads on nasioc but some on the UK forums

There are results of SS and TS 1.5xtr on here but no 2.5xtr on a ej207.....yet atleast


My car is getting e-tuned now and when finished ill post a log. I can tell you I see 18psi by 4250 in 3rd gear and one would only assume this turbo would make more power than the 1.5. So my personal opinion/guess is the SS 1.5xtr and TS 2.5xtr spool very similar but the latter makes more power


Can't go wrong with either turbo but Blouch did recommend the TS 1.5xtr over the 2.5xtr to me and I'm happy with my decision since I wanted a turbo to pull to 8k and not 7,600
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Old 08-26-2013, 11:48 AM   #20
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Quote:
Originally Posted by Paul View Post
Might not be balls to walls but def not conservative. He's running 25psi and in that thread said he pushed the timing.

No comparison threads on nasioc but some on the UK forums

There are results of SS and TS 1.5xtr on here but no 2.5xtr on a ej207.....yet atleast

My car is getting e-tuned now and when finished ill post a log. I can tell you I see 18psi by 4250 in 3rd gear and one would only assume this turbo would make more power than the 1.5. So my personal opinion/guess is the SS 1.5xtr and TS 2.5xtr spool very similar but the latter makes more power

Can't go wrong with either turbo but Blouch did recommend the TS 1.5xtr over the 2.5xtr to me and I'm happy with my decision since I wanted a turbo to pull to 8k and not 7,600
Sounds interesting, I'm looking forward to the results. Although, I have heard the 207's love timing up top anyway.

Keep us posted!
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Old 08-26-2013, 01:04 PM   #21
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i would go atp gtx3071
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Old 08-26-2013, 01:22 PM   #22
Paul
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You have results of one on a EJ207?? It's basically a 1.5xtr and you have the option of running a external waste gate off the turbo. They are pricey tho
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Old 08-26-2013, 02:45 PM   #23
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I've been running my v7 ej207 with a rotated holset hx35 and a fmic setup. I see 23 psi by ~4700 rpm and it pulls all the way to 8200. It is making about 400whp according to virtual dyno. I am quite happy with the setup honestly. I have about what a 1.5 xtr costs into the rotated setup.
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Old 08-26-2013, 10:38 PM   #24
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Quote:
Originally Posted by 207STi View Post
I've been running my v7 ej207 with a rotated holset hx35 and a fmic setup. I see 23 psi by ~4700 rpm and it pulls all the way to 8200. It is making about 400whp according to virtual dyno. I am quite happy with the setup honestly. I have about what a 1.5 xtr costs into the rotated setup.
This is pretty much the same setup that I have. I have a fully built v7 with a holset 40 on it. I'm hooking the meth kit up in a few weeks and shooting for about 430-450whp with the 8500 redline
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Old 09-30-2013, 11:11 PM   #25
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What Bout 16gxt... Someone recomended it, is it a good turbo....
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