Welcome to Ultimate Subaru Message Board, my lurker friend!
|Welcome to Ultimate Subaru Message Board, an unparalleled Subaru community full of the greatest Subaru gurus and modders on the planet! We offer technical information and discussion about all things Subaru, the best and most popular all wheel drive vehicles ever created.
We offer all this information for free to everyone, even lurkers like you! All we ask in return is that you sign up and give back some of what you get out - without our awesome registered users none of this would be possible! Plus, you get way more great stuff as a member! Lurk to lose, participate to WIN*!
* The joy of participation and being generally awesome constitutes winning
** Not an actual guarantee, but seriously, you probably won't regret it!
Serving the Subaru Community since May 18th, 1998!
Anyone running aftermarket or custom intake manifold?
Posted 04 November 2003 - 06:50 PM
Posted 04 November 2003 - 08:07 PM
Posted 04 November 2003 - 08:49 PM
Dennisex24 and a few others are running the famed spider intake. I am curious who started the hype about the spider intake. I want proof of some sort showing a difference in performance. Is it worth the time/headache? Anyone know anything?
Posted 04 November 2003 - 11:48 PM
Posted 05 November 2003 - 05:59 AM
Vacuum ports can be added as needed. Off of the plenum for manifold vacuum.
Depending on carb used, you may have some there, but it will have the ported vacuum for the disty anyways.
Posted 05 November 2003 - 09:12 AM
if you ever get the chance, comepare the spider to the normal, flat EA82T intake.
the difference is huge, especially after porting.
Posted 05 November 2003 - 11:52 AM
Posted 05 November 2003 - 11:56 AM
Don't forget the rice factors:
Simply making a change adds horsepower (even decals will accomplish this).
If it looks better, it MUST be better (it's amazing how fast your car will go with colored vacuum lines)...LOL
BTW...I'm adding a spider to my RX:D
Posted 05 November 2003 - 12:03 PM
Posted 05 November 2003 - 12:09 PM
Posted 05 November 2003 - 12:24 PM
Originally posted by taprackready
Why could't some enterprising person make a copy of the ram intake but out of steel tubing like ehaust tubing? Seems like it would be easy to trace the bottom of a factory intake and cut out the flanges that bolt to the head, get some prebent mandrel tubing from summit and weld it together with a box center section to bolt on the carb. Bill
I've also read that people have fabricated the flanges and made runners out of mandrel bent exhaust tube. There are also instructions for fabricating a carbon fiber intake manifold HERE. I have neither the time nor inclination (a/k/a ability ) to fabricate a metal intake. A composite one might be a fun project (with an extra high "rice factor" if I used carbon fiber )
Seriously, I appreciate the "rice factor" discussed above, but doesn't a small increase in runner diameter equate to a larger increase in cross sectional area? I assume the ID of the Joe Souza and Ram runners must be larger than stock. They also lose the charge-warming cross section-reducing coolant passage.
P.S. Assuming the "spider intake" works better, can you put a Weber on it? Or is it fuel-injection only?
P.P.S. I deleted the Ram photo.
Posted 05 November 2003 - 12:56 PM
The problem with the EA81 manifold is that it has a water crossover for the two block halves. This makes modifying or replacing the manifold very difficult. The other drawback is the heating of the air by the hot manifold, cold and dense gives you more power. There are solutions to this although they are not cheap or easy. Some in the aviation community have made replacement manifolds out of carbon fiber with a water passage separate from the manifold. This is both lighter, better flowing and cooler. LINK 1
The intake manifold is replaced with a custom one with larger diameter runners and no coolant passages to heat the charge. I made mine from carbon etc........... deleted...... (see my article on carbon manifold construction....................
The intake manifold is replaced with a custom one with larger diameter runners and no coolant passages to heat the charge. This can be done in a variety of ways ranging from mating custom bent pipes to heavy-duty hoses all the up to fabricating an entire manifold from carbon fiber.LINK 3 (this one includes a photo of an engine with a custom intake manifold.)
Posted 05 November 2003 - 03:13 PM
Dennis doesn't need one, he has one already. I'm the one that needs one for my project.....maybe we can work something out.
Posted 05 November 2003 - 06:37 PM
Originally posted by taprackready
is anybody running a custom intake on this board? What is a Spider intake and will it fit an EA81. Pictures?
It doesn't look like anyone is running a custom intake
Posted 05 November 2003 - 06:47 PM
Posted 05 November 2003 - 08:09 PM
Posted 07 November 2003 - 01:22 PM
The manifold is designed around the two barrel Weber carburerator, the intake runners are 25% larger in diameter than the cast aluminum intake manifold. The intake is designed for more low end torque.
It comes with an in-line thermostadt, it does not come with a carb, that is additional $275. The intake gasket and bolts are included along with carb base gasket and nuts.
he also said the manifold/carb combo is about the same height as a stock manifold and Redline Weber carb and adapter.
It looks like Joe's manifold orients the carb the same way as the Redline Weber conversion, which should make hooking up the linkage easiere. The ovel hole in the RAM intake is oriented side-to-side. The oval hole in Joe's is oriented fore-an-aft.
Posted 07 November 2003 - 10:45 PM
Yes, build a new manifold - you will vastly improve the system!!
Posted 07 November 2003 - 11:40 PM
Posted 09 November 2003 - 03:29 AM
But now I met a hot rod chevy dood who is interested in subarus, and knows all about souping stuff up and fabrication, so hopefully we'll figure somethin out.
Its good that your stirrin the pot, cuz alot of people stop chimin in when it comes to engine mods, but keep us posted on what you find, and i'll do the same.
with out the increased manifold flow, the decked heads with larger ports don't mean much, so its important that people modding an EA engine figure something out for the IM...
Posted 10 November 2003 - 12:47 PM
I'll be doing more research on that this week.
Posted 10 November 2003 - 01:53 PM
Posted 11 November 2003 - 01:09 PM
Originally posted by StormTrooper
When I refer to the widening of exhaust ports, and decking, I'm refering to the much cheaper modding of the single port heads.
I got the dual carb long-block and Joe's intake. Joe and Ron have bothe been real helpful. When I crack the dual-carb long-block, I'll clean up and maybe widen the ports. The dual-carb head is already decked, or so I am told. I'm tempted to go all-out, but my plans already blow the hell out of my budget for this car. I will probably just bolt on the Weber and Joe's intake, upgrade the ignition system and open up the exhaust from the y-pipe back.
Posted 11 November 2003 - 03:05 PM
0 user(s) are reading this topic
0 members, 0 guests, 0 anonymous users