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Old 09-08-2011, 09:49 AM   #851
Homemade WRX
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Quote:
Originally Posted by scby rex View Post
Anyone know if the wrc ver 4 manifold will bolt to later year heads?
they're phase 1, so no. The bolts are in a straight line and not staggered.
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Old 09-08-2011, 01:11 PM   #852
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Old 09-08-2011, 08:55 PM   #853
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how is that going to work with where the manifold inlet is and the cosworth oil pump?

Homemade do you have a pic of the difference of ver4 and ver7? Mine looks inline to me.
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Old 09-09-2011, 01:53 AM   #854
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Originally Posted by scby rex View Post
how is that going to work with where the manifold inlet is and the cosworth oil pump?

Homemade do you have a pic of the difference of ver4 and ver7? Mine looks inline to me.
bolt hole's for the heads are different placing, 1994-1998 and in a stright line(4 bolts per-side)
1999-2012 are 2 out side bolts are back and 2 in the middle are center.

cut the bottom mount bracket of a 99-00 wrx/sti intake manifold and cut the bottom of the 1994-98 mounting bracket and weld the 99-00 on to the bottom(making sure it all lines up) and then just clean up the ports to suit the new mounting bracket.

Leo,I was going to buy 1 of them OBX copy(Tomei copy) just to have a play around with...any results on that set up so far?

Kris

Last edited by Rising Sun Subaru; 09-09-2011 at 02:00 AM.
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Old 09-09-2011, 08:00 AM   #855
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Quote:
Originally Posted by fobiawrx View Post
i thought that had a water to air intercooler in it? in between the runner section and the tb section? could be wrong though?
No intercooler inside. I have a gigantor front mount. It's possible that Fastech made one with an intercooler inside. The intake manifold on Fastech's drag car is bigger even than mine. Fastech is on here (PlatinumRex).
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Old 09-09-2011, 10:43 PM   #856
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Thanks rising sun. Anyone know if there is a phase 2 wrc manifold available like the ver4?
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Old 09-09-2011, 10:56 PM   #857
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Originally Posted by scby rex View Post
Thanks rising sun. Anyone know if there is a phase 2 wrc manifold available like the ver4?
http://www.subaruwrcspares.com/10.html

Kris
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Old 09-10-2011, 01:23 PM   #858
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GC with Tomei intake manifold





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Old 09-10-2011, 01:27 PM   #859
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Old 09-11-2011, 01:59 PM   #860
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Heres what Ive got going so far. I still need need to make a throttle cable bracket and do a little more clean up then its off to the powder coaters.





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Old 09-11-2011, 06:04 PM   #861
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Looking good scby rex. What throttle body is that? Do you happen to know the inner diameter size of the back side (mating surface) of the throttle body?

Tom
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Old 09-11-2011, 06:25 PM   #862
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Thank you, its the AT power 72mm designed for rogerclark motorsports. They are using a DBW now though. It bolts up perfectly to the wrc manifolds. Im not understanding the "backside" but its 72mm front to back no taper.


www.atpower.co.uk
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Old 09-11-2011, 06:38 PM   #863
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Sorry for the confusion...
Back side meaning opposite end of inlet. You answered my question by stating 72mm diameter with "no taper". Looks like you have a very high quality throttle body for sure. I would like to know more about your build. Do you have a thread posted?

Tom
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Old 09-11-2011, 06:41 PM   #864
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Just on iwsti, my motor is std til she pops.

http://www.iwsti.com/forums/other-ve...ars-tuned.html
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Old 03-08-2012, 01:12 AM   #865
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will the ej20g intake manifold bolt up to the usdm stock heads? i have on laying around and they dont have the tgv but just straight thru so just jw if anyone tried. thanks
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Old 03-08-2012, 08:38 AM   #866
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Quote:
Originally Posted by scby rex View Post
Homemade do you have a pic of the difference of ver4 and ver7? Mine looks inline to me.
Sorry have been swamped lately and not on here.

As far as I know the Ver 4 is a phase 1 style manifold where the 4 bolts will be in line and not staggered like most of us are use to seeing.

I however am not 100% on this. I never got much into the old school JDM parts.
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Old 03-08-2012, 09:16 AM   #867
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Quote:
Originally Posted by simprezl25
will the ej20g intake manifold bolt up to the usdm stock heads? i have on laying around and they dont have the tgv but just straight thru so just jw if anyone tried. thanks
No the 20g will not, I think the bolt pattern may work but it is not wide enough, carl davy in the uk makes a set of spacers that you can cut your plenum and weld in to make the phase 1 manifolds work with phase 2 heads but by the time you buy them and and do the required work plud any rewiring to make the different sensors work you would probably be much better off just doing a tgv delete from what I havr read.
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Old 03-08-2012, 09:08 PM   #868
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I am hoping I can bolt up the stage .5 ported 2.5 NA big tube short runner from ASF Machine to my JDM TGV deletes and 2011 STI throttle body...I want to get everything gasket matched from the throttle body into the intake, the intake, to the TGV's, then the 8mm phenolic spacers and finally into the heads.....


Here is to hoping....
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Old 03-08-2012, 10:55 PM   #869
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Quote:
Originally Posted by spackyscooby View Post
No the 20g will not, I think the bolt pattern may work but it is not wide enough, carl davy in the uk makes a set of spacers that you can cut your plenum and weld in to make the phase 1 manifolds work with phase 2 heads but by the time you buy them and and do the required work plud any rewiring to make the different sensors work you would probably be much better off just doing a tgv delete from what I havr read.
you're the man thanks
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Old 03-09-2012, 01:54 AM   #870
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No problem, and when I posted that I was at work and didn't have time to look it up but as Homemade posted the bolt patterns between ph.1 and 2 are different, that is what the spacers made by Carl Davey addresses. Then you have to widen your phase 1 mani by 12-14mm as seen here, http://www.carldavey.co.uk/product.php?id=16.
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Old 06-16-2012, 07:00 PM   #871
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Just another guy installing a 2.5i manifold...



Does anyone know off-hand what size NPT fittings are needed to plug these holes? Are they 1/8" NPT?

Last edited by 8thWonder; 06-16-2012 at 08:11 PM.
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Old 06-16-2012, 09:10 PM   #872
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^^update, they're not 1/8" NPT
I'm thinking they're M10-1.0 bolt size... not 100% sure though, since the only parts store within walking distance didn't carry that size.
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Old 06-19-2012, 08:37 AM   #873
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They wouldn't be 1/8" NPT on a Subaru, if anything they'd be 1/8" PT (also known as 1/8" BPT). Slightly different than NPT.

There are a number of 10mm fasteners on the car, can't you just pull one out to use to check?
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Old 06-19-2012, 09:44 AM   #874
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Quote:
Originally Posted by Patrick Olsen
They wouldn't be 1/8" NPT on a Subaru, if anything they'd be 1/8" PT (also known as 1/8" BPT). Slightly different than NPT.

There are a number of 10mm fasteners on the car, can't you just pull one out to use to check?
You're exactly right - they're 1/8" BPT. Will be using a 1/8" NPT tap to make them compatible with some sensors.
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Old 11-24-2012, 03:14 PM   #875
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Thought I would bump this one along Dyno testing results coming very shortly



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