i just have a gripe that our nice engines have some crappy plastic intake manifold instead of a nice metal one, has anyone heard of any companys making us an aftermarket intake manifold especially if it gives some nice hp numbers? also metal would look a whole lot better in the engine bay as well. i know gm makes a manifold but thats all out race so im not sure it would be good for a street car and i dont think it fits a 2.4 either.

 

You mean there's something inherently wrong with a composite intake?

I rather like it. It doesn't heatsoak, its lightweight, won't easily warp, doesn't involve coolant, and is really easy to install aftermarket goodies on.

 

i dont know, something about it just seems cheap to me...so are you saying that this composite is superior to a metal intake? if so why do you think in the celica for example, the top end model gt-s has a metal intake manifold and the base model gt has a composite intake manifold?

 

Cost, pure and simple. It costs a lot less to make a composite mani than a cast aluminum. Performance is about the same. Only difference is that a cast aluminum can be ported and polished a lot easier than an composite. But for the cost of a P&P, you probably could make a revised composite mani.

 

Composite manifolds are a lot smoother on the inside which allows for better airflow. There are many pros to having a composite manifold. Many of them were listed above.

 

well either way do you think the aftermarket will give us a new performance intake manifold?

 

I have my doubts. Just by looking at the manifold I don't really see a lot of room for improvements. Sure you can Extrude & Hone them but other then that i don't see the advantage of an aftermarket manifold.

 

well i guess we will wait and see what happens, it would even be nice to have a show piece in poilshed or something even if it makes like only 5 hp i would probably get it

 

If you want something like that your going to be better off having it done yourself. Finding a stock manifold is going to be difficult but once you find one you can have it polished or whatever you want and then you turn around and sell your stock one for a core for someone else.

 

all the above reasons are all good

1 thing no one brough up , and i thinks its 1 reason the factorys also consider , if the car gets in a accident and gets hit hard enough to hit the intake , the composite 1 will break apart , bad thing small parts can get into the combustion chamber ( i had to have a celice head repaired cause of a slightly bent valve)

where the aluminum intake would be more likely to cause more damage before it broke , like destorying the head

plus on the eco the started is under the intake , so a plastic 1 wont short out on the main power cable , where a aluminum intake would short out and cause a fire

 

well thats something to consider i guess, maybe later on i can take it out and see if there is anything that can be done to the stock manifold to increase performance

 

If you have THAT kinda damage, you've got other problems i.e. radiator and front core damage. What are you worried about the intake for?

 

good point

 

I dont mind a composite intake but then again Im coming from the LS1 world and almost 90% or more of the intakes are composite. The only ones I know of that are not, are the Holley intake and custom made sheet metal intakes.

I personally like not having to worry about heat soak as much.

 

OK, here's what I have found and I can't find it anywhere. I have e-mailed several performance parts companies to see if they can help us with this; I also e-mailed Venom to see what they can tell me besides the following:


This is the description and picture from the Venom website:

Intake manifolds are CNC machined billet aluminum head flange and intake runner surface CNC machined runners to reduce turbulence thus increasing the speed and volumetric efficiency of intake manifold. The manifold excepts up to 66 mm throttle body. Can be used on naturally aspirated or under forced induction. The Polished manifolds make a great addition to any show car.


* All Manifolds* are offered in red, blue, polished, black, and satin.

* All manifolds can be matched up to 66 mm throttle body

* Increased Volumetric efficiency by 70% over stock Intake

* Ideal for Forced induction applications or heavily modified Naturally aspirated motors

* Manufactured in house @ Venom Performance

* CNC Billet 6061 T-6 aluminum


Check these links:

http://venom-performance.com/nf/html/prodtoc.cfm
http://www.venom-performance.com/nf/...fold/iman.htm#

I'll update as soon as I hear anything from anyone.


Scott

 

well yeah id like one of these peices but it wont be as effective in hp increas until f/i but ill get a nice polished one will look great under the hood too

 

if you're looking for show, get the GM manifold and polish and powdercoat it.

if not, stick with stock. it's good to something around 300+ horsepower.

you really want to swap over when you go FI, otherwise the only benefit you're achieving is looks...

pretty pricey for that.

 

Found this on Ebay.
Aluminum Ecotec Intake Manifold

 

cheap ebay stuff. it says "it is my understanding that GM prototyped this for the drag racing program"

the GM ecotec drag racing manifold looks way different than that. how is it going to fit a 2.0 cobalt as well as a 2.2L ecotec? i was under the impression that the hole pattern was different on the two.
Also, how is it going to mount the supercharger? the throttle body was mounted on the supercharger not on the intake manifold so unless the hole pattern to mount the supercharger is the same as the mounting for the throttle body it wont fit.
the guy only has 4 sales...kinda risky too.

sorry for the rant but ebay scammers **** me off.

 

It never did say it would work with the S/C, it just said it would fit the 2.0L head. It would be good if you wanted to switch to a turbo on your 2.0L.

 

i think it raises too many scam alarm bells...too many problems when they say "i think" or "as is" or "it might"
it isnt the ecotec drag racing manifold, we have all seen that one on the gm site and in the gm build book.

 

i bought something simmilar off ebay a while back. it was an intake that looked simmilar to the ACTUAL drag racing manifold, claiming to be it. when i got it, it was some piece of **** off a honda or something that had a 20 min weld job for a new flange. definitely not what was pictured and not anything that can be considered to be superior to the stock manifold.

ebay is full of shady people, you always gotta watch when they dont have too many buys or sells.

if you want a nicer manifold, just buy a second stock manifold and paint it.

 

Well the Venom might work
Does ANYONE know of someone that has used the Venom with a throttle-by-wire TB??

Another option would be the aluminum Saab B207 intake.(B207 is what Saab calls the Ecotec) There are a few Saturn and JB guys that have used it with success. I believe maybe smaller runner chord dimesion than the stock 2.4 BUT has very short runners - probably good for turbo/nitrous?? BONUS it already HAS the TAC TB bolt pattern.
PN#55352128 For $175 probably worth a try??

*pics "borrowed" from TSN- with Thanks
WOT

 

https://www.cobaltss.net/forums/show...t=13389&page=3
i just noticed that the patterns are opposite in these two pics compared to the ones you have posted here(the venom intake manifold from one looks like it has the same hole pattern as the stock manifold in the other, and vice versa)

i think i understand what you are saying, it might be a matter of doing some custom fab but i dont think it would be anything major.

if you can get me a link of somewhere that i can buy it, i will go and buy it and take photos on the install and let you know if it fits.

 

well talk to venom themselves, since you are doing some r&d for us maybe they can direct ship it to you for a discounted price