Thinking about building a custom intake mani.

Originally Posted by Iceman00

I'll keep waiting. And for the record, I added 20whp. Stock cams, headers and intake manifold. 175whp+ and waiting (maybe) for headers and intake manifold.

You added 20whp from what??

Originally Posted by sedanpowersc

You added 20whp from what??

He said he's sitting at 175 WHP, 175 minus 20 = 155....

Originally Posted by jared_wiesner

He said he's sitting at 175 WHP, 175 minus 20 = 155....

Yeah i understand that but is that 20whp over stock with just some headwork?

Sent from my DROID RAZR using Bimmer App

The head is the most restrictive part of our engines, no matter the displacement. Just a simple polish of the OE head castings can improve the flow and increase torque and HP. Why is this hard to understand?

Originally Posted by Hornung418

The head is the most restrictive part of our engines, no matter the displacement. Just a simple polish of the OE head castings can improve the flow and increase torque and HP. Why is this hard to understand?

I already knew that and i understand, im just asking, he never said what he gained 20whp from so i was confirming that it was in fact from just headwork. By that notion i should make ~215-220whp with headwork and my cai and exhaust considering my car makes anywhere from 190-200 stock

Sent from my DROID RAZR using Bimmer App

Originally Posted by sedanpowersc

I already knew that and i understand, im just asking, he never said what he gained 20whp from so i was confirming that it was in fact from just headwork. By that notion i should make ~215-220whp with headwork and my cai and exhaust considering my car makes anywhere from 190-200 stock

Sent from my DROID RAZR using Bimmer App

He has stock un-ported heads. Headwork will get you very little gain without support from other mods. The head may be restrictive, but only once you open up the bottle neck of the stock exhaust manifolds and even more-so once you have cams. Headwork would be the very last thing I do to an engine that is breathing as well as it can everywhere else. Otherwise you will see very little gain from your money until you do everything else. Headwork will act like a multiplier to every other N/A mod you do. If you do nothing and only headwork, it will net you almost nothing.

Originally Posted by jared_wiesner

He has stock un-ported heads. Headwork will get you very little gain without support from other mods. The head may be restrictive, but only once you open up the bottle neck of the stock exhaust manifolds and even more-so once you have cams. Headwork would be the very last thing I do to an engine that is breathing as well as it can everywhere else. Otherwise you will see very little gain from your money until you do everything else. Headwork will act like a multiplier to every other N/A mod you do. If you do nothing and only headwork, it will net you almost nothing.

Got it.

picking up an intake mani next week for 50 bucks

the flange for the head will run me 80 bucks

velocity stacks no idea

i gotta do some research... Iceman gimme specs for my custom mani!!!

Not from my iphone

I have built a custom intake and intake box all made of aluminu
And custom strut bar like no other and was thinking of starting to sell
Them to all fanatics check out my pic hard to see till I
Post more close up pics and also pics of fabrication process
Let me know what u think also built custom exhaust all stainless steel
Havent posted pics every thing is tig welded I have weld and fab shop
Thinking of building intake manifold but need to machine the mounting
Flang but dont know where to go from there dont know how
To actualy gain hp by just incressing volume of mani or what need help
From real knoledgable people, research is not cheap.
Really intressted in going in to performane mods and opening
Performance shop.

Originally Posted by lui328i

I have built a custom intake and intake box all made of aluminu
And custom strut bar like no other and was thinking of starting to sell
Them to all fanatics check out my pic hard to see till I
Post more close up pics and also pics of fabrication process
Let me know what u think also built custom exhaust all stainless steel
Havent posted pics every thing is tig welded I have weld and fab shop
Thinking of building intake manifold but need to machine the mounting
Flang but dont know where to go from there dont know how
To actualy gain hp by just incressing volume of mani or what need help
From real knoledgable people, research is not cheap.
Really intressted in going in to performane mods and opening
Performance shop.

Very interested in see your custom manifolds! Need to dyno before and after and see what you can pick up!

Sent from my DROID RAZR using Bimmer App

just got the other intake so hopefully will get this project goin soon

Not from my iphone

Lol lots of negativity in this thread. Lets see:

11.5:1 high compression pistons (stock CR is closer to 10:1)
272 cams
extensive headwork to flow a claimed 85% more than stock

Id believe 280+ whp from this setup. On a 4 cylinder car, every point you raise the CR is worth 20+whp, after a full dyno re-tune.

i have considered in stalling e90 manifold they seem less restrictive to me but you have to mate the injectors and other electronics

Fyi, don't use the disa valves from the E90 mani, I had one come apart and get stuck in #6 intake valve, somehow the valve didn't get bent.

If there is room in the m54 head, you could machine some holes for the injectors & fab a custom fuel rail. Assuming the intake ports match up to the m54 head.

Originally Posted by Russian172

i have considered in stalling e90 manifold they seem less restrictive to me but you have to mate the injectors and other electronics

Is this an easy swap/power gain from this?

Originally Posted by sedanpowersc

Is this an easy swap/power gain from this?

I'm almost 100% when I say this has never been done before.

Originally Posted by B_Cyrus

I'm almost 100% when I say this has never been done before.

yeh i doubt the ports are even close

Not from my iphone

Originally Posted by IrocThe325i

yeh i doubt the ports are even close

Not from my iphone

That's what i was thinking but he was making it sound like it isnt too hard, but from what i understand the manifold isnt the bottle cap but the actual head is so im wondering why even go through the trouble swapping manifolds if it wasnt pretty simple to swap or worth any real gains

Sent from my DROID RAZR using Bimmer App

Because race car mudafaka

would be interesting if the n52b30 manifold would bolt up to an m54