My professor and I are about to start designing and testing a custom intake manifold that will flow better for the 98-01 Impreza RS. I wanted to see how many people would be interested in something like that and how much people would be willing to pay. I know that the stock intake manifold is super restrictive and a ton of power could be freed up from a different manifold; this would be especially good for those who have some headowork or cams. The manifold will be a full custom sheet metal manifold. It will be designed and tested on my heads. We will be using the flow bench to do everything, so we will have real flow numbers, not just some shot in the dark about how much we think it will flow.
My professor that is helping me design this manifold is a designer for ford's engine race development stuff (SVT Focus, Contour, Mustang/Cobra, etc) and holds over 20 national and world titles with the engines he's built and designed. One engine that particularly grabbed my attention was the 1.6 liter turbo'd Ford Cosworth that put out 1000 horsepower and was still strong enough to race around a track for an entire season! (until it was banned) And that was back in 1989! He has all the tools and a state of the art facility, so this will be tested to the highest degree.

Please give me some feedback on who would be interested in this.
Thanks.

Nathan

 

triman i think yur intake problem is due to yur MY99. now this is just from a friend of mine who researched for his MY98 so i duno if its 100% (but he usually knows wut he's talking about). from wut i've heard the MY99 and older hav a different intake system from the MY00/01. the pre MY00's hav a problem with aftermarket intakes because the O2 sensors get dirty and break or malfunction. they fixed it in 2000. cobb has an intake that is made by someone (can't for the life of me remember) which maintains the stock box and a cleaner for preMY00's so that u keep everything clean and u maintain yur low end torque, which u tend to lose with a lot of aftermarket exhausts and intakes. NOW PLEASE if anyone knows that i'm wrong please correct me otherwise hope this helps. OH yeah and i would eventually be interested in a custom intake manifold!

 

My professor and I were talking. He would like to get another ECU and wiring harness so we could run my engine on his engine dyno and that way we would be able to test the heads with the intake manifold.
We are also discussing making some kind of cold air intake system with a custom torque box and possible maintaining the stock air box from the fender. I think he would also be interested in offering a complete package. It would be ported heads, valve job, etc. with the cold air intake and the custom intake manifold. These would all be offered by my professor through his shop.

 

My professor and I were talking. He would like to get another ECU and wiring harness so we could run my engine on his engine dyno and that way we would be able to test the heads with the intake manifold.
We are also discussing making some kind of cold air intake system with a custom torque box and possible maintaining the stock air box from the fender. I think he would also be interested in offering a complete package. It would be ported heads, valve job, etc. with the cold air intake and the custom intake manifold. These would all be offered by my professor through his shop.
Also, my professor would like to get heads from a SOHC car. We are mocking up the intake manifold on my car with the DOHC and we will be mocking up an engine with a set of SOHC heads so that we'll be able to get everything perfect. Someone let me know if you can help me out with this little problem of finding some SOHC heads. They could be completely bare or cracked or blown up, it doesn't matter, we just need them to fit up the manifold.
One last thing. My professor and I also discussed the possiblity of making dual intake maifolds. He said that it will make a much more effective flow to have 2 seperate intake manifolds. We might experiment with the possiblity of doing this with a custom torque box that would maintain the stock position of the air intake system. We'll see how that turns out, I'll let you all know.
Please (everyone) get back to me if you have any ideas, criticisms, parts, etc.

Thanks.

Nathan

 

is it possible from wut u think u'll b doing with either the single or double intake manifold to keep most of yur stock parts where they r? or is either way going to change locations and even hav a need for custom intake parts to be utilized?

 

We are hoping to develop another style of torque box to fit over both intake manifolds (if we do dual) to keep the stock location. This all is going to take a while, so I'll let you all know how it goes.

 

Bump

 

a custom intake manifold that has individual throttle bodies would be pretty cool for a 1.8l. im intrested