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Old 12-24-2011, 04:49 PM   #2126
Vlad
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I vote with a bit louder.
I even checked the donut gasket.
Also, I thought I saw an additional resonator in the V9 exhaust.
I only got the downpipe with my swap.
I am runing the same exhaust as before the swap (Prodrive ).
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Old 12-25-2011, 03:48 AM   #2127
arco
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i am running a blitz touring (the oval quieter version of the R). i am running it with a catted MRT midpipe and JDM catless downpipe. It's not too loud. I think it's a good balance of sound and performance.

this is run on my v8 btw
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Old 12-27-2011, 06:33 PM   #2128
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Sorry if this has been posted... but perhaps one of you guys with experience will know this:
I have a JDM sti limited version 7 (same as spec-c) and i realize these are great motors (forged internals, big heads, yada yada).
Right now I am running with the stock vf30 turbo with turboback. On a higher reading dyno, I am at about 308hp/291 tq (stock 5-speed)

What is the limit hp-wise for these motors (stock form)? 350 whp? 400 whp?
I don't plan on upgrading in the near future, but say 6 months from now I want to upgrade to a bigger turbo. I dont want anything crazy, but anything above 350 and below 400whp would be nice. Is this realistic? Will the stock motor be able to handle this alright? or am I looking at rebuilding the motor....

Thanks folks! (Yes I know I'll probably have to upgrade to the 6speed)
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Old 12-27-2011, 06:43 PM   #2129
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I hate to be one of "those guys". But did you read any of this thread? I mean, I was curious about the 207s so I read all 86 pages of it.. Anyways..

There are many guys making 350-400 or more on the stock motors with anything from 20gs to 35rs. Any increase in power will decrease the lifespan of the motor. How far you want to take it is up to you. From what I have read they are very stout motors though. And since they make less torque than the 2.5 liter they will be easier on your 5 speed.
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Old 12-27-2011, 07:09 PM   #2130
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Quote:
Originally Posted by Jubert39 View Post
Sorry if this has been posted... but perhaps one of you guys with experience will know this:
I have a JDM sti limited version 7 (same as spec-c) and i realize these are great motors (forged internals, big heads, yada yada).
Right now I am running with the stock vf30 turbo with turboback. On a higher reading dyno, I am at about 308hp/291 tq (stock 5-speed)

What is the limit hp-wise for these motors (stock form)? 350 whp? 400 whp?
I don't plan on upgrading in the near future, but say 6 months from now I want to upgrade to a bigger turbo. I dont want anything crazy, but anything above 350 and below 400whp would be nice. Is this realistic? Will the stock motor be able to handle this alright? or am I looking at rebuilding the motor....

Thanks folks! (Yes I know I'll probably have to upgrade to the 6speed)
I thought the spec-c motors came with vf-34 turbos. What's your engine code Julian? I'll run it for you to confirm if you want. As for the power, I've been running close to 400 whp for about 3 years now as a daily driver. Not a single issue with the motor thus far.
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Old 12-27-2011, 07:19 PM   #2131
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Quote:
Originally Posted by gling View Post
I thought the spec-c motors came with vf-34 turbos. What's your engine code Julian? I'll run it for you to confirm if you want. As for the power, I've been running close to 400 whp for about 3 years now as a daily driver. Not a single issue with the motor thus far.
Hey Gerald- Ive been told the JDM STI version 7 limited motor is the same motor as the Version 7 Spec C. The only difference is the vf30 vs vf34.

I have the vf30 on my car. I love the way it runs now. Its not OMGFAST, but its quick- fun on the highway ramps. It is my DD so reliability is number 1, and chances are I may not even upgrade my turbo at all. But, BUT, if I did, what would be a good turbo to run for 350 hp (308 now). If 350 makes the car unreliable, then I wont upgrade at all...
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Old 12-27-2011, 07:21 PM   #2132
Jubert39
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Quote:
Originally Posted by evan_impreza View Post
I hate to be one of "those guys". But did you read any of this thread? I mean, I was curious about the 207s so I read all 86 pages of it.. Anyways..

There are many guys making 350-400 or more on the stock motors with anything from 20gs to 35rs. Any increase in power will decrease the lifespan of the motor. How far you want to take it is up to you. From what I have read they are very stout motors though. And since they make less torque than the 2.5 liter they will be easier on your 5 speed.

Didnt see this post at first- I read through some of it, but I know about the gt30R being able to hit 400. I just didnt know how the reliability would be... Perhaps someone with a version 7 or 8 blew there motor after pushing XXX whp....
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Old 12-27-2011, 07:36 PM   #2133
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As best as I remember I don't remember reading anyone in this thread talk about blowing one up. Maybe that is a testament to how great these motors are. Everyone raves about how much abuse they can take. You should have zero issues with a 350-375whp daily driver. That being said, everything is relative, and things can always go wrong.
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Old 12-27-2011, 09:32 PM   #2134
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Quote:
Originally Posted by i2cou4u2 View Post
Are you running a Ver. 8 or Ver. 7 motor? Seems like the twin scroll motors are slightly louder....maybe it's just me though.

Tom
I find the 207 twin scroll to be a Ton louder, compared to the 205. I had to install (2) 12" resonators to quiet things down enough for it to be tolerable. Still pretty noisy. 's all relative though.
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Old 12-28-2011, 10:38 AM   #2135
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Quote:
Originally Posted by K.Linchpin View Post
I find the 207 twin scroll to be a Ton louder, compared to the 205. I had to install (2) 12" resonators to quiet things down enough for it to be tolerable. Still pretty noisy. 's all relative though.
Agreed.

My 05 with a Ver 8 and maddad whisper is louder than my buddies full catless Invidia at idle and start up.
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Old 12-28-2011, 11:46 AM   #2136
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Quote:
Originally Posted by ChestyPuller

Agreed.

My 05 with a Ver 8 and maddad whisper is louder than my buddies full catless Invidia at idle and start up.
Your cold start Idle is usually between 1500-1800 rpm, which is higher than an EJ205. Also an EJ207 idles at approx. 800 rpm's once it's fully warmed up. Lots of things that will make you think the 207 is a much louder engine.
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Old 12-28-2011, 11:56 AM   #2137
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Quote:
Originally Posted by kayen View Post
Your cold start Idle is usually between 1500-1800 rpm, which is higher than an EJ205. Also an EJ207 idles at approx. 800 rpm's once it's fully warmed up. Lots of things that will make you think the 207 is a much louder engine.
good to note, thank you.
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Old 12-28-2011, 02:55 PM   #2138
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I am currently running a 3" catless TBE on my Ver. 8 and it is really loud right now for my tastes. It put down 280 horse and 276lbs of torque with this setup on a DynoCom dyno. I am thinking about puting the stock Downpipe back on it and getting another tune to quite it down a bit. How much power do you think I will loose by doing that? Could the loss of power be made up with a water/meth kit?

Thanks

Tom
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Old 12-28-2011, 03:06 PM   #2139
kayen
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Quote:
Originally Posted by i2cou4u2 View Post
I am currently running a 3" catless TBE on my Ver. 8 and it is really loud right now for my tastes. It put down 280 horse and 276lbs of torque with this setup on a DynoCom dyno. I am thinking about puting the stock Downpipe back on it and getting another tune to quite it down a bit. How much power do you think I will loose by doing that? Could the loss of power be made up with a water/meth kit?

Thanks

Tom
You will lose some power for sure, but honestly why not just get a Hi-Flow Cat and have it welded into your Downpipe? Also does your current Catback have any resonators and if not that would also help your cause.
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Old 12-28-2011, 03:20 PM   #2140
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Yeah. Run a cat on the street. Its better for the ENV and you dont have to smell exhaust all the time. You wont loose that much power with one high flow cat and it will knock the noise way down.

I run a Greddy EVo2 exhaust and they are nice and quiet.
C
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Old 12-29-2011, 12:20 AM   #2141
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Quote:
Originally Posted by Clark Turner
Yeah. Run a cat on the street. Its better for the ENV and you dont have to smell exhaust all the time. You wont loose that much power with one high flow cat and it will knock the noise way down.

I run a Greddy EVo2 exhaust and they are nice and quiet.
C
Will I have to retune for a high flow cat?

Tom
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Old 12-29-2011, 07:33 AM   #2142
Vlad
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From the factory, the V9 reverts to a US length downpipe (shorty) and the front fipe (that follows) has on it ... something... that looks more like a resonator than a converter.
Then, in the midpipe, it has a resonator that is couple inches longer than the USDM Sti and wider too.
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Old 12-29-2011, 10:08 AM   #2143
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Quote:
Originally Posted by kayen View Post
You will lose some power for sure, but honestly why not just get a Hi-Flow Cat and have it welded into your Downpipe? Also does your current Catback have any resonators and if not that would also help your cause.
I definitely agree with CT. Run a cat unless this is your hotrod/race car. Though, not sure how much my hi-flow cat does for emissions.

My full 3" Cobb has a Hi-flow cat, and the 2 resonators. It is pretty loud. I would like to share some video that I have recorded w/my contour HD from a couple AX's and record some vid (for the audio) of just driving around. Does anyone else have one of these cameras that we could compare to? I, for one would like to hear the Whisper in comparison.

Water/Meth kit sounds like a cool idea.
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Old 12-30-2011, 01:43 PM   #2144
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hey does anyone have the wiring schematics for the avcs harness that is needed?
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Old 12-30-2011, 02:19 PM   #2145
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Originally Posted by unkachabull View Post
hey does anyone have the wiring schematics for the avcs harness that is needed?
https://docs.google.com/viewer?a=v&p...ZDM1YWE4&hl=en

From:
http://forums.nasioc.com/forums/show....php?t=2118295
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Old 01-01-2012, 03:58 AM   #2146
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Question : Does the JDM EJ207 version 7 injectors are top feed? or side feed?

Thanks.
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Old 01-01-2012, 10:39 AM   #2147
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Quote:
Originally Posted by Mosting3 View Post
Question : Does the JDM EJ207 version 7 injectors are top feed? or side feed?

Thanks.
top feed
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Old 01-01-2012, 02:01 PM   #2148
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top feed
Thanks Sir.
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Old 01-02-2012, 03:56 PM   #2149
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hey guys having an issue with my car and its been there since i bought it. im thinking its a tuning or fuel cut issue. help would be great

my issue is that when i had the stock iwg actuator it would surge in low rpms while building boost around when the vf30 reaches its peak boost,after that when it would taper off it would pull fine to redline

my car is tuned to 21 psi on a conservative tune for stock trans by mspt

so to try to fix the problem ive done the following which have done nothing,and one part did something ill explain later

didnt do crap
1) different bpvs
2)tmic

did something
1) avo adjustable wastegate actuator

after playing with the wastegate actuator and trying to find the right setting it seems that the car will surge if its adjusted any more than 15psi.
set at 15 psi it pulls strong all the way to redline no surges

im thinking the surging is because im hitting fuel cut? it needs a retune to run more than 15psi or im running out of injector?
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Old 01-02-2012, 04:47 PM   #2150
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Did you buy it with a tune, or did you have it tuned?

Do you know what injectors and what pump you have on the car?

Why don't you post a list of mods.

So you're hitting fuel cut, or not?

The actuator sees sufficient pressure to defeat the 15PSI spring, once the table in the ECU calls for it.
15 PSI is quite a strong spring for a VF30 I would think.
The stock actuator, that you seem to have replaced, was probably a 7-9 PSI one.
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