which is better, itb's or good inlet manifold?


EKandrew

EKandrew

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Aug 11, 2012
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as abaove which is a better setup along with a fully built b18c with upgraded pistons and the head fully done? which would give the best power results? thanks in advance!
 
Ultimately an inlet manifold will be best for outright power, but ITBs will win for throttle response and noise. I reckon ITBs would be cheaper that a proper designed custom inlet manifold.
 
EKandrew said:
what all does the engine need to avail fully of itb's?
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Someone who can map the car wright... A few lads I know with rally civics are getting 215-220 bhp from built b16s with jenvey itbs, and then others in the same class are only gettin about 210 with the same set up from a different tuner ...
 
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Puggie said:
Ultimately an inlet manifold will be best for outright power, but ITBs will win for throttle response and noise. I reckon ITBs would be cheaper that a proper designed custom inlet manifold.
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No way, my old engine on itbs made 215whp with a standard head, when I sold it, it was cammed and itr intake manifold added, made 200whp and slightly less torque.

the noise I can imagine was better bodied up and throttle response was incredible.
 
Do what I did get the standard b18c intake cut it open and bore it out works well on my built b18c and it's port matched to head and tb next best thing besides itbs but needs to be done by someone who nos what there at
 
Puggie said:
Ultimately an inlet manifold will be best for outright power, but ITBs will win for throttle response and noise. I reckon ITBs would be cheaper that a proper designed custom inlet manifold.
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Sorry but that isn't true.
 
Wazer said:
No way, my old engine on itbs made 215whp with a standard head, when I sold it, it was cammed and itr intake manifold added, made 200whp and slightly less torque.

the noise I can imagine was better bodied up and throttle response was incredible.
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Yes but you have swapped a set of probably decent ITBs for a non optimal poorly cast inlet manifold. That is not the comparison I was making.

Vtec6000 said:
Sorry but that isn't true.
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I'm not talking about basic off the shelf inlet manifolds here, off the shelf ITBs will beat an off the shelf manifold, but a properly engineered manifold will beat ITBs for power.
 
Puggie said:
Yes but you have swapped a set of probably decent ITBs for a non optimal poorly cast inlet manifold. That is not the comparison I was making.



I'm not talking about basic off the shelf inlet manifolds here, off the shelf ITBs will beat an off the shelf manifold, but a properly engineered manifold will beat ITBs for power.
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That's why you spend two grand on itb's / manifold / linkage /ecu /loom /injectors because there not as good !!!
 
Puggie said:
Yes but you have swapped a set of probably decent ITBs for a non optimal poorly cast inlet manifold. That is not the comparison I was making.



I'm not talking about basic off the shelf inlet manifolds here, off the shelf ITBs will beat an off the shelf manifold, but a properly engineered manifold will beat ITBs for power.
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actually mine were only obx itbs, hardly a set of jenveys or toda's.. Just a diy port on the plenums aswell. cost me well under half the price of a set of toda's ;-)
 
Puggie said:
I'm not talking about basic off the shelf inlet manifolds here, off the shelf ITBs will beat an off the shelf manifold, but a properly engineered manifold will beat ITBs for power.
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Ok I guess all these sub 10 sec all motor K series out there need to switch from ITB's to a plenum type intake manifold :rolleyes:
 
Vtec6000 said:
Ok I guess all these sub 10 sec all motor K series out there need to switch from ITB's to a plenum type intake manifold :rolleyes:
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Who was asking about K-series engines? Thought the OP was looking at a B18?

The OBX bodies are remarkably close to the Todas if you compare them, I'd probably buy OBX over jenvys on a b18.
 
Yeah they are, think mine cost under £500. Can't remember exactly, but was around that. If I had the choice again, I would go with the roller type
 
Puggie said:
Who was asking about K-series engines? Thought the OP was looking at a B18?

The OBX bodies are remarkably close to the Todas if you compare them, I'd probably buy OBX over jenvys on a b18.
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Same theory applies. And if we want to keep like for like why are you comparing off the shelf ITB's to a custom intake manifold!

What you will struggle to match with any plenum type intake manifold is the transient throttle response that ITB's offer.
 
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