Intake manifold

[nb07bcar]

Do you think its worth building a intake manifold?

[BlackFlag_s13]

Mods? Talk to GroundZero Motorsports, they have an Intake mani for sale...

[nb07bcar]

I don't want to buy one. I would nake one for a 1/4 the price. just wondering if it really helped any?

[Structure240sx]

even if it doesnt make a ton more power, which iut should make some 10-30 depending on the setup at least, it will get rid off oall the useless vaccum and emissions on the intake manifold. less chance of having boost leaks and a much much cleaner setup. and makes working on the motor alot easier.

[fiznat]

^^ yeah I agree-- I would like one one of these days just so I can get rid of that huge ugly stock mani that gets in the way of everything.

Ant, did you ever get a chance to do that dyno comparison with the new mani?

[Structure240sx]

i only gained 8rwhp with 1.5 more psi. from the torque curve it looks like my clutch is slipping. theres no way it should be holding this power anyway. also the turbo possible could be out of breath

[dsylvia]

why bother going through the hassle of building one when the ground zero manifold costs like $550.

i've been thinking of getting that one but im sure how it'll be without an IACV and im not sure if i want to deal with modifying my intercooler piping.

[nb07bcar]

Because I could build one for like $100. What moron would spend $500 on a manifold that they could build for fraction of that price.

[GEO]

Wow mr cheapasss, most morons don't know how to engineer and perefectly design and flowtest a manifold.

[cianide]

I haven't seen any information on flow testing or any associated claims in relation to that intake manifold. From what I can see, it is basically a plenum that they managed to bolt to a stock piece. I don't think that could gain much horsepower from a technical standpoint. However, if you were buying for looks, or to gain some more room in your engine bay, it may be good for just that...

[nb07bcar]

Wow mr cheapasss, most morons don't know how to engineer and perefectly design and flowtest a manifold.

Sorry Geo. I can't see spending that much on a manifold when you could make one for a fraction of the price. Thats a crazy amount for some aluminum. I guess If you can't do it yourself your screwed.I just wanted to know if it made any more power. Also while on the subject. Can you adapt a different throtle body to the intake mani and have the computer reconize it or would you have to run a stand alone unit? I wanted to upgrade to a 90mm instead of the 60mm for futre mods.

[myowncasualty]

i believe the q45 throttle body is a 90mm and bolts up directly with no modifications to wiring....correct me if im wrong.

[HardcorePS13]

I haven't seen any information on flow testing or any associated claims in relation to that intake manifold. From what I can see, it is basically a plenum that they managed to bolt to a stock piece. I don't think that could gain much horsepower from a technical standpoint. However, if you were buying for looks, or to gain some more room in your engine bay, it may be good for just that...

Most of the time within a manifold of decent size, you only need to shorten the runners to provide resonance in the higher RPMs. Typically it is done by shortening stock runners, which have extensive flow testing with the stock port geometries from the factory, by welding on a plenum mid-runner.

For turbo engines the intake manifold tends to be less engineered than one found on an N/a application for various reasons.

[HardcorePS13]

Sorry Geo. I can't see spending that much on a manifold when you could make one for a fraction of the price. Thats a crazy amount for some aluminum. I guess If you can't do it yourself your screwed.I just wanted to know if it made any more power. Also while on the subject. Can you adapt a different throtle body to the intake mani and have the computer reconize it or would you have to run a stand alone unit? I wanted to upgrade to a 90mm instead of the 60mm for futre mods.

If you do not understand the concept of a hot wire MAF fuel system then it is my perogative that you will not see beneficial gains in designing your own intake manifold.

[projectka-t]

Because I could build one for like $100. What moron would spend $500 on a manifold that they could build for fraction of that price.

I dont think you have even called on any pricing for aluminum or mild steel....... IMO

[projectka-t]

^ Sorry not trying to sound like a @$$ , but i would check and do a little research before saying you could do it for 100.00 bucks

[danb8586]

^ Sorry not trying to sound like a @$$ , but i would check and do a little research before saying you could do it for 100.00 bucks

Not to offend you but i built my intake manifold for 120bux but i have a friend that welds aluminum. check out rossmachineracing.com.

[nismofly]

Sorry Geo. I can't see spending that much on a manifold when you could make one for a fraction of the price. Thats a crazy amount for some aluminum. I guess If you can't do it yourself your screwed.I just wanted to know if it made any more power.

well he told you if youd read, its not just taking a bunch of aluminum and welding it together and sticking it on there...if thats all you want to do youll probably lose power...thats just for looks

more of the money goes towards the r&d type stuff so that it makes more power

last time i checked theres a number of parts youre paying for where a lot more of the money goes towards development than just plain old metal costs

[scarboroughdub]

i will be building my own manifold within the next week, i was just wondering what you guys with aftermarket short runner manifolds have done to the idle stablizer valve setup. whether you incorporate it or just use the throttle body.

thanks

[Edub1]

If you have a turbo your manifold isn't going to amount to a hill of beans. Are you going for 800HP or what?

[Chezedik]

Why not switch to a Corvette TB, then you could control idle through a rheostat and a GM IAC. But then again, without standalone for idle control, it would be rigged.

EDIT: come to think of it, it wouldn't be a rheostat, but you would use a three way momentary switch.

[Chezedik]

Why not switch to a Corvette TB, then you could control idle through a rheostat and a GM IAC. But then again, without standalone for idle control, it would be rigged.

[uvamosk]

Thanks for that link to the site that has stuff to build intakes... becuase Im going to have one built.. already called the shop he told me just for labor of welding alum it would be around 20$ for a hour of their work... and PLUS MATS... so I buy that take in my old Intake already cut... have them weld it up and im set... Ill have to come up with a way to polish those runners wher ethey weld.. so might have to cut it open and have it rewelded but deffinaly going to be aroud 100 to 120$

[nb07bcar]

I dont think you have even called on any pricing for aluminum or mild steel....... IMO

What kind of manifold are you building that will cost more than $100 for parts. Must be for something really big. A tube and some square plate at a scrap place cost about $20. if you really want to go fancy you could get bent tube for about $30 for 2 bends. So it might then cost you $70. Where do you go to buy aluminum? They must really rip you off!

[Nismo_Freak]

Anyone else find it ironic people are talking solely about price and not design.

I guess we all understand fluid dynamics.

[uvamosk]

I was actualy going to have my Friend that is a MECH Engineer Help me design it He does AUTO cad like no tomarrow.. So ill talk to him in more detail about it. But for the most part I was thinking just copy the Sr20det manifold. I mostly want it for the shorter runners because when you start craming air its alot less problems with it being perfect design.. and honestly anything is better than that monstrosity that is on there already...

[Edub1]

Are you building an N/A motor? Because with a turbo the manifold doesn't matter unless you are going for stupid power. You see, there is little value in decreasing flow restriction because you will have a turbo forcing the flow under pressure. You could do more simply by adding another pound of boost.

If you are building a NASCAR engine that's one thing, but in your situation it has little or no practical purpose.

[95_240sx]

Well...Interesting thread.

Actually, GroundZero sells the manifold that Xcessive Motorsports manufactures. Same guys who did the manifold(s) on my s14 and are personal friends of mine. The person who designs and does the building over at Xcessive is an incredible engineer and has 20+years of experience. They also make manifolds for the FD RX7, a Twin throttle body 2jz manifold, RSX manifold, oil pans etc. Its not like Xcessive just got the design for the KA manifold off the back of a cereal box or anything, we tried SEVERAL different designs and styles on both my own s14 and another s14 (drift car though) to find the best design as possible.

Also, when was the last time you flow benched a manifold under boost?

Rick

[nissanfanatic]

Quote »Are you building an N/A motor? Because with a turbo the manifold doesn't matter unless you are going for stupid power. You see, there is little value in decreasing flow restriction because you will have a turbo forcing the flow under pressure. You could do more simply by adding another pound of boost.[/quote]IDK WTF you are talking about...but how well a manifold flows becomes even more crutial under boost. Just because pressure exists inside the manifold does not mean that air is equally distributed nor does it mean that air will flow well.

Fluid dynamics my friend.... And some of us do not want to make 300whp at 25psi.

Quote »Anyone else find it ironic people are talking solely about price and not design. I guess we all understand fluid dynamics.[/quote]No ****... When half of them are fretting over GT BB turbos.

[Edub1]

How much benefit would such a manifold be over stock?

Say a guy has a T3/T4, is he going from 400HP to 500HP at the same boost level?

What is the actual HP gain and how is it so much better than another few lbs? By the way, manifolds are specifically tuned to the motor based on tubal resonance and many other factors so you would probably have to do a lot of monkying before you get it right.

Like I said, if you want sick power that is a different matter. How much does a good aftermarket one cost?