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Old 11-23-2002, 06:16 PM   #1
joefocker20
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Default Intake Manifold

Does anyone sell an Intake manifold for EJ25s?
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Old 11-23-2002, 07:15 PM   #2
munkis
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as in a 'high performance' manifold?

I dont know of any but...I dont know everything

Jay
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Old 11-23-2002, 09:25 PM   #3
joefocker20
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I heard Syms is, whats their url?
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Old 11-24-2002, 01:26 AM   #4
joefocker20
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I guess if this was something as pointless as the spg mod, I would have tons of replies..
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Old 11-24-2002, 01:29 AM   #5
joefocker20
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I think the only reason the N/A people have for not making power is a lack of interest.. Here's what I want to do with / what I've already done with my car..

Ganz
New Airbox with 3" opening
K&N
Bored TB
Custom Intake Manifold
Cobb or Paeco Cams/Heads/Shortblock
Borla Headers
Random Tech Cat
Stromung Catback
GFB Pulleys
Proecm
S-AFC
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Old 11-24-2002, 01:45 AM   #6
Kostamojen
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Prodrive makes a modified forward facing intake manifold, a few of the folks who make subaru engines into airplanes have made different ones, and I have seen a picture recently of an N/A EJ series engine with a custom intake manifold by Syms.

But if you want REAL power, get independant throttle bodies like that nutty Japanese impreza race wagon that puts out like 270hp from a N/A 2.0l engine
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Old 11-24-2002, 01:47 AM   #7
joefocker20
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Where can you buy them?
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Old 11-24-2002, 03:15 AM   #8
Kostamojen
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Quote:
Originally posted by joefocker20
Where can you buy them?
I wish I knew... Let me look and see if I can find anything.

All i can find is the syms prototype: http://www.spomotorsports.com/JapanG...ustomerID=3350
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Old 11-24-2002, 06:54 PM   #9
Tattoo Collector
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Default If you're interested

I am doing an 11:1 compression N/A engine. I can't go too crazy since I am using it for commuting 150 miles per day as well as racing, toying, trying to get myself killed, etc. I am taking engine blueprinting classes and my professor and I are going to be balancing the cranks I have and polishing and cryo'ing the rods. I will have an extra set of main bearings, [rods, crank (balanced, polished, etc.)] pistons and wrist pins. If you are interested I could make sure they are available within the next few weeks. I also might have a block if I find out that it wasn't really cracked as expected. Once I get it apart, I am going to magnaflux the block to determine. Let me know.
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Old 11-25-2002, 11:17 AM   #10
joefocker20
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Isn't the compression on EJ25s 10.5-1 or 11-1 already?
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Old 11-25-2002, 12:09 PM   #11
bratmantlz
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bad head gasket or bad block eh tatoo? ditto i beleive its the headgasket dont know... so your gonna be building a newer better engine too nice good luck i am about four weeks from my low compression 8 5 to 1 engine i am going to boost.. good luck. oh dont know of any manifolds...
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Old 11-25-2002, 12:50 PM   #12
Tattoo Collector
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As far as compression goes, the phase I has 9.7:1 and I think the phase II also has that compression. I think it went up to 10:1 with the 2002. I am not 100% sure, but I remember when I started, I looked up the info on the web somewhere.

As far as the block or head gasket, I am not sure. I have to pull the heads off when I have my engine blueprinting class on wednesday since my engine is up at school. If I get a chance, I might pull them off today, but I am not sure that I will.
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Old 11-25-2002, 12:57 PM   #13
jeffg
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Phase 2 is 10:1 the same as the 2002's.
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Old 11-26-2002, 01:19 AM   #14
joefocker20
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Well, Im starting to have faith again.. I'm going to contact JUN tomorrow and see if they make one. If not, I may email SYMs and ask if I can test theirs in the US to see how it works with our emission systems and what not.
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Old 11-27-2002, 01:20 AM   #15
dcoty
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Joe20- I sent u a pm

I had my stock one ported and polished, but I will make a custom one this winter with my brother.

I diddnt know syms made one, thats neat, but I dont hink Jun offers any though, i was looking at stuff ro my car (stroker kits) and I diddnt come across anything like that, but I could be wrong.

If anyone is curious i threw a rod yesterday in my car and Im now in the process of making a very crazy block. Its listed in my thread http://forums.nasioc.com/forums/show...hreadid=280963 . it will safely rev to 9,000 with a closed deck and 11:1 compression, knife edged crank and all the other goodies. It will also handle a 100 shot of nitrous from a direct port wet kit.

Tatto Collector, i could use your input too for sure! Please reply to it if you have ideas, anyone else too, thanks guys.

Dab
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Old 11-27-2002, 01:24 AM   #16
Rob K
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From the pictures the syms header looks like it has very long primaries and almost no plenum at all. Not the optimum setup for NA power. I do like how it connects at the head; allowing for some adjustability in the length of the runners. In my opinion you can't make a 1 piece/single TB intake manifold the is optimal for high RPM power on a NA engine
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Old 11-27-2002, 02:01 AM   #17
joefocker20
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I think Syms is 1 piece isnt it?
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Old 11-27-2002, 12:57 PM   #18
Craig W
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How 'bout just getting the stock one Extrude Honed and port matched? Seems easier, probably cheaper than designing your own and will probably give results as good or better that what you'd get w/ any of the other options.
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Old 11-27-2002, 01:13 PM   #19
skywalker
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I am beta testing one as soon as it gets here. Hoping it will work with a N/A or RS-T setup. I'll post the website as soon as I can find it.
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Old 11-27-2002, 03:32 PM   #20
dpjef
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Keep this thread alive guys!

(btw. got mail from spomotorsport they don't do SYMS anymore)
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Old 11-27-2002, 10:26 PM   #21
Storm
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I can tell you that TWM is not very enthusiastic in coming up with a individual TB setup. Kinser Fuel Injection, on the other hand is not so close-minded. It'll take some doing and stuff, but a unique intake is not out of the question. They need a longblock to make the fitment work and then to work out injector sizing, placement, etc....
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Old 11-28-2002, 02:28 AM   #22
Rob K
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You can extrude hone and port match the stock manifold to death. That won't fix the inherent design flaw the ej25 manifold has when it comes to high RPM power. The runners are too long and the plenum too small.
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Old 11-28-2002, 12:17 PM   #23
danci1973
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Quote:
Originally posted by Rob K
You can extrude hone and port match the stock manifold to death. That won't fix the inherent design flaw the ej25 manifold has when it comes to high RPM power. The runners are too long and the plenum too small.
Bigger plenum with shorter runners and TB at stock location - would that make a difference?

Thx, D.
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Old 12-07-2002, 02:51 AM   #24
joefocker20
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This can't die.. Bump!
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Old 12-07-2002, 01:09 PM   #25
Storm
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Thumbs up

I'd like to see some of the designs that the aviation crowd have come up with.

The Syms prototype looks tasty, and along the lines of what I was thinking of doing. No doubt they want an arm and kidney for it though....

Maybe we can look at the direction some of the Porsche builders have gone, given the basic design similarities.

Jay Storm
www.sourcemotorsports.com
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