silicon intake install with manifold on. Can it be done?

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Delivan
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silicon intake install with manifold on. Can it be done?

Postby Delivan » Fri Jan 23, 2015 12:39 pm

Has anyone successfully installed a silicon intake on a gc8 with the intake manifold still in place ?? It looks like a LOT of work to remove the manifold.. I was thinking with a bit of heat and lubrication it may just slide on in there or is that just wishful thinking.... :?
'09 Impreza Charcoal Hatch Auto
'03 WRX Pearl Red Bug Sedan
'02 WRX Silver Bug Wagon
'98 WRX Blue Club Spec Evo 2 with 2.5 lt
'99 WRX White Sti Version 6 with 2.5 lt
'98 Mitsubishi EVO 5 (kept in the basement)

ryano
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Re: silicon intake install with manifold on. Can it be done?

Postby ryano » Fri Jan 23, 2015 12:48 pm

cut a little silicone off the bit where the BOV returns (they are usually too long and get in the way) then lube it up and ease it in inch by inch like a gentleman

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Re: silicon intake install with manifold on. Can it be done?

Postby ryano » Fri Jan 23, 2015 12:52 pm

some people tie a rope through the BOV return and the turbo end and pull it through as far as possible but i haven't tried that

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deejw
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Re: silicon intake install with manifold on. Can it be done?

Postby deejw » Fri Jan 23, 2015 1:03 pm

When I did the last one on my v6 it was hard enough getting the old inlet out and new inlet in AFTER removing the manifold. Ended up removing the fuel rails too. I think it would be too frustrating trying to do it with manifold on, but I just prefer to do things that way. Manifold off method will take the better part of a day.
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Re: silicon intake install with manifold on. Can it be done?

Postby Lupin » Fri Jan 23, 2015 3:42 pm

You can do it. Its like getting a octopus in a jar.

You need to make sure you check the intake for length against the plastic one and cut where needed.

Then you need lots of lube, some cable ties to tie down the bits that stick out, and luck.

You also cant remove the plastic one without breaking it with the manifold on.

But to be honest you can get the manifold off fairly easily.

Like this

viewtopic.php?f=6&t=70905
Image
Mr June 2014 Mr May 2015

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Delivan
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Re: silicon intake install with manifold on. Can it be done?

Postby Delivan » Fri Jan 23, 2015 5:07 pm

Excellent.. That looks well worth trying... I am just concerned about gasket damage etc with removing the manifold.. Shame the old one gets wrecked on the way out. I might try zip tie, lube etc when removing...

By the way.. am I going to need a tune ??? Probably due for one anyway as I have added an in guard cai and this intake is the final bit to be done.. It was making 180 on 16lb before I added the cai.. Would like to make the magic 200 but dont want to go over 18lb as I want it to last.. It's 2.5 with 130,000k on new motor..
'09 Impreza Charcoal Hatch Auto
'03 WRX Pearl Red Bug Sedan
'02 WRX Silver Bug Wagon
'98 WRX Blue Club Spec Evo 2 with 2.5 lt
'99 WRX White Sti Version 6 with 2.5 lt
'98 Mitsubishi EVO 5 (kept in the basement)

JBonDSS
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Re: silicon intake install with manifold on. Can it be done?

Postby JBonDSS » Fri Jan 23, 2015 5:13 pm

Ken , NO :)

Like others have said just getting the std one out can be epic

Allow a bit of time, it'll come together ok

2011 -HH 61.79 Calder 1:09 Winton 1.43 Sandown 1.30 PI 1.58
2012 - Heathcote 13.4 Calder 1.22(wet failure) Sandown 1.25 PI 1.59
2013 - Winton 1.44(7psi) Sandown 1.25 PI1.49 Sandown 1.26

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turboshift
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Re: silicon intake install with manifold on. Can it be done?

Postby turboshift » Thu Jan 29, 2015 4:36 pm

I chopped up the std one and lubed up the AVO and it fit in there nice and snug :)

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davey_charlie
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Re: silicon intake install with manifold on. Can it be done?

Postby davey_charlie » Thu Jan 29, 2015 6:23 pm

i took the mani off and did 550 injectors + parallel lines at the same time. i hate the stupid subaru under the manifold intake, thank god i have a twist mount sitting in the shed.

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Re: silicon intake install with manifold on. Can it be done?

Postby Hasti » Mon Feb 09, 2015 7:20 am

Is there a DIY for the silicone intake for a GC8 somewhere with pics??
92 RS Lib - No more!
06 STi - No more!
01 GT Foz - No more!
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Delivan
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Re: silicon intake install with manifold on. Can it be done?

Postby Delivan » Mon Feb 09, 2015 11:11 am

'09 Impreza Charcoal Hatch Auto
'03 WRX Pearl Red Bug Sedan
'02 WRX Silver Bug Wagon
'98 WRX Blue Club Spec Evo 2 with 2.5 lt
'99 WRX White Sti Version 6 with 2.5 lt
'98 Mitsubishi EVO 5 (kept in the basement)

Hasti
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Re: silicon intake install with manifold on. Can it be done?

Postby Hasti » Mon Feb 09, 2015 1:36 pm

Cheers Delivan.

I've seen that and looked for others on you tube.

However the GC has the power steering reservoir that makes it a lot tighter, unless its removed.
Also in the description that came with my AVO intake, it mentions to cut 2 brackets from the inlet manifold (see pictures) but there is no supplied pictures?
Can someone tell me which brackets they refer to?
92 RS Lib - No more!
06 STi - No more!
01 GT Foz - No more!
99 V5 STi coupe - Current.

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Delivan
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Re: silicon intake install with manifold on. Can it be done?

Postby Delivan » Mon Feb 09, 2015 9:05 pm

AHHHHHHHH !!!!!!! fregin cars.....Well 8 hours and big bucks later and it is kind of back to gether. You are right about the power steering reservoir.. It needs to be unbolted and swung off to the left and to get that out you realy need to remove the alternator and lay it over to the right. That gives you a pretty good access to the "hole".
Ever seen a baby being born... I have seen 6.. this is a bit like that.. impossible but can be done ....providing you have the right type of silicon pipe. The one I had was not the sort to do without taking off the manifold. As a result, and because I thought it was a matter of holding my tonge in the right place and adding a bit of lubrication and pushing and shoving and tying it tightly together with zip ties, I managed to distroy my brand new intake pipe...bummer....so off I went to Subievo and got another.. can't remember what brand it is, maybe avo , or something like that..$350 ... :shock: so much for a cheap mod...almost $400 by the time I bin the other one...
That bracket you were asking about is the fuel line support bracket. There are a coupl of them and they do get in the way.. I ground them into a 1/2 moon shape taking them to almost half their original width and it did help. They would have been rubbing all the time and I know our sti was killed by the intake wearing through on that. (previous owner fortunately).

So this is the new one in place with all the hoses clamped and all new vacume hoses as they all just shattered.
The advantage of this new one is it is a single piece right to the AFM with no angle and joiners etc..much tidier..It would want to be for the price..

Image

This is the original "new" one that is now bin fodder.. It was only 2 layers of canvas or what ever.. The avo is 6 layers..

Image

And if you look at the center of this pic, directly behind the hose clamp head, you will see the front fuel hose support and you can see where I have ground it on the left side. I have one of those small grinder thingies that works of the compressor. Excellent for doing fiddly hard to get at stuff. Would still be there if I was using a file ...

Image

Anyway there is about 2 hours worth of work tomorrow to finish it off..If I had known how hard and how expensive this was going to be I would never have bought the first one. That will teach me to be power greedy..

I just want to get back to current project... Started looking like this when we bought it home from Rockhampton last Tuesday..

Image

Image

and since Saturday it looks like this... :whistle:

Image

Like I said....frigen cars....
'09 Impreza Charcoal Hatch Auto
'03 WRX Pearl Red Bug Sedan
'02 WRX Silver Bug Wagon
'98 WRX Blue Club Spec Evo 2 with 2.5 lt
'99 WRX White Sti Version 6 with 2.5 lt
'98 Mitsubishi EVO 5 (kept in the basement)

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deejw
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Re: silicon intake install with manifold on. Can it be done?

Postby deejw » Mon Feb 09, 2015 9:26 pm

Yeah its a mission of a job. I remember thinking why did I do all that for such a tiny difference in performance :roll: Really if your stock one isnt torn or you dont have the manifold off for another reason I wouldnt recommend it. Too much pain for too little gain, it can also cause surge in certain turbos.

Think it took me about 2 days start to finifh first time manifold off method and I also did the leaking rocker cover gaskets at the same time.
New Foz Build http://ozfoz.com/forum/viewtopic.php?f=12&t=43042

Hasti
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Re: silicon intake install with manifold on. Can it be done?

Postby Hasti » Tue Feb 10, 2015 4:59 am

Far out what a bummer of a job
Thanks for the photos Delivan
I am now going to re asses fitting it or not.
92 RS Lib - No more!
06 STi - No more!
01 GT Foz - No more!
99 V5 STi coupe - Current.

Hasti
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Re: silicon intake install with manifold on. Can it be done?

Postby Hasti » Tue Feb 10, 2015 5:26 am

Delivan did you have one or two brackets you had to modify?
I was told on my 99 there's two I have to attack
Your pics are very helpful by the way.
Cheers
92 RS Lib - No more!
06 STi - No more!
01 GT Foz - No more!
99 V5 STi coupe - Current.

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Delivan
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Re: silicon intake install with manifold on. Can it be done?

Postby Delivan » Tue Feb 10, 2015 10:54 am

In my 98 model, there are actually 3 brackets under there but the rear one is out of the way so you only need to do the front 2. With the PSteer etc out of the way it is easy to get in there. I used one of these die grinders. Makes it very easy.. Remember to vacuum in there after you are finished to get filings out and cover turbo before you start. The 2nd bracket is about 30mm further in but still easy to get to..
http://www.ebay.com.au/itm/2X-16PC-1-4- ... 35e501f9f7
Those are 2 sets for $30 so get a friend and buy a set each. They are VERY handy tool if you have a compressor..
Image
I am off to put the rest back together..
'09 Impreza Charcoal Hatch Auto
'03 WRX Pearl Red Bug Sedan
'02 WRX Silver Bug Wagon
'98 WRX Blue Club Spec Evo 2 with 2.5 lt
'99 WRX White Sti Version 6 with 2.5 lt
'98 Mitsubishi EVO 5 (kept in the basement)

Hasti
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Posts: 1335
Joined: Tue May 19, 2009 4:23 pm

Re: silicon intake install with manifold on. Can it be done?

Postby Hasti » Tue Feb 10, 2015 11:30 am

I have a set like this in the garage.
Hope all goes well.
Cheers
92 RS Lib - No more!
06 STi - No more!
01 GT Foz - No more!
99 V5 STi coupe - Current.

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Delivan
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Re: silicon intake install with manifold on. Can it be done?

Postby Delivan » Tue Feb 10, 2015 9:32 pm

All done.. Slightly improved performance and torque, louder induction sound and exhaust also seems louder although that doesn't make sense. Certainly not worth the $400 it ended up costing me. May help to get to 200kwts but that will be due more to raising the boost to 18lb rather than this silicon intake I think..
Anyone thinking off doing a mod would be wiser to spend the money on sway bars or anti lift kit or alloy sway links.. or lowering springs or 4 pot upgrade.. I have done all that plus a lot more and the silicon intake was kind of the last thing left to do. My engine compartment still looks almost stock to the untrained eye which is what I like..

Image
'09 Impreza Charcoal Hatch Auto
'03 WRX Pearl Red Bug Sedan
'02 WRX Silver Bug Wagon
'98 WRX Blue Club Spec Evo 2 with 2.5 lt
'99 WRX White Sti Version 6 with 2.5 lt
'98 Mitsubishi EVO 5 (kept in the basement)

ryano
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Posts: 270
Joined: Thu Aug 19, 2010 9:12 pm

Re: silicon intake install with manifold on. Can it be done?

Postby ryano » Tue Feb 10, 2015 9:46 pm

good job, most only go down this path because the stock one rips as did mine, i have done one and paid to have two done, i see your first silicone replacement ripped at the BOV return did it?

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