Good or not good?

 

Any one?

 

Some guys in another post have them. They talk about how expensive they are compared to the BR racing intake which has the same design. My question is how do these compare to the BJ's intake? With the design of the plenum do you get more low end then the BJ's but lose some top end or how does that work?

Chris

 

Keep in mind that once you have the manifold, you will have to install it.. so far I haven't heard of any of them that will just "bolt on" Not that its really a bad thing, but do keep in mind that there may be some reworking of things, and It has no provisions for some of th emissions system (EGR I think)

I definitely like the Buschur manifold for the price, and have heard (but have no personal experience) that it may be a bit more straightforward to install than some of the others.

I think they all will function well, they all have straighter runners and a larger plenum so they will all be an improvement over stock.. HOWEVER I am not aware of these being "Engineered", which means trial and error runner length or flow experiments, or surge tank etc.. I am only aware of one VERY EXPENSIVE manifold that has gone through that engineering.

That doesn't really mean anything when comparing to the stock manifold since as long as this manifold works, it will work better than stock.

To make a long story short.. If your willing to make it work, and make the modifications necessary, its certainly a worthwhile install..

 

MakibuJack,

Thanks for the info. How much of a gain do you think an well designed AF Manifold could add?

 

Not to steal the question or anything but from what i heard with a good intake manifold and throttle body you could gain 30-40whp.

 

Yum... Is this on an EVO?

 

It really is going to depend alot on your mods.. an intake manifold is one of those "Optimization" mods, so the amount of gains you get are directly related to the rest of the system your working with. The intake manifold alone is likely good for 20-22hp in the mid to upper RPM range.. with no other mods.. but it could 30-40hp if you had other modifications such as upgraded intercooler pipes, intercooler, cams, MAP conversion (or blowthrough MAF upgrade) since the more you free up the intake flow and reduce restrictions, then the restrictions that are already still there become apparent..

I would say realistically, with the average mods that most people make, the gains would be around an optimistic 25hp.. Thats not bad, but then you weigh your bang for the buck factor.. Intake manifolds are kind of expensive, and the modifications (or paying someone to install it) could run you a bit more.. For me, its worth the expense, but for you.. it would have to be your own call.

I would have to assume that if your asking about an upgraded intake manifold, you've already addressed nearly every other restriction prior to it (since thats how I'm working, looking at each component, and reducing the restrictions I find.. after the Intake, I'll focus on a ported head)

Also, its important that when you look for an aftermarket manifold that you ask the right questions.. Most are not just bolt-on swaps, andwill require modification to quite a few components, and revisions to fit.. but the minimum questions you should be asking are "Can I use the stock throttle body" I have heard from several good sources, and upon examination I also believe, that the stock throttle body is capable of flowing a good amount of air, probably adequate enough for 90% of the mods out there. If you get a manifold that requires an aftermarket throttlebody, keep in mind that most don't have built-in idle air control therefore you can potentially have idle problems. of course this is just an ancillary consideration.

Of the research I've done, the Buschur manifold and the APS manifold appears to require the least modification (the APS apparently is a bolt-on with no modifications necessary) The JR's seems to have the most R&D invested into it, but like the Magnus, they seem to require the most work to install.

Hope this helps..

 

Yes.

Thanks a bunch!