Stock intake limits - Honda CRZ Forum: Honda CR-Z Hybrid Car Forums
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post #1 of 12 (permalink) Old 03-14-2017, 09:10 PM Thread Starter
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Stock intake limits

Hi guys,

I am new here.
I have a compressor project in mind for my CRZ.

Some questions:

What is the maximum pressure that the stock plastic intake can sustain?

I plan to operate with no intercooler. Could this intake sustain high temperature?

Could this intake survive an upstream auxiliary fuel injection or methanol injection?

Thanks

Serge
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post #2 of 12 (permalink) Old 03-14-2017, 11:17 PM
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Supercharger kits and turbo's are taking at least 8 PSI without changing the intake manifold.

Your concern should be more about the internals than the manifold itself.
Pistons and rods will deform/crack, before the manifold.
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post #3 of 12 (permalink) Old 03-15-2017, 07:42 AM Thread Starter
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Originally Posted by Aceryl View Post
Supercharger kits and turbo's are taking at least 8 PSI without changing the intake manifold.

Your concern should be more about the internals than the manifold itself.
Pistons and rods will deform/crack, before the manifold.
Thanks for the answer.
It's then more than enough.
My goal is only 5 psi, maybe 6 at low rpm.

I don't want to go into heavy and complex modifications.
I feel that 5 psi at 6000 rpm is probably the maximum that could be done without an intercooler.

It's still significant for a HP gain compaired to wasting money on just high flow intake or exhaust just to gain 5-10 HP.

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post #4 of 12 (permalink) Old 03-15-2017, 02:26 PM
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just remember, the intake manifold was designed for naturally aspirated application in mind, which usually operates under a vacuum.

that said, people still boost them, not just CRZ's but other cars as well, and a few PSI probably won't hurt anything. guys with sprintex superchargers also run no intercooler, but i have yet to hear any major problems with the intake manifold.

just keep in mind, if you drive hard, as in long sprints at full boost, heat soak in hot weather or bad traffic, or run a day at the track, you increase the chance of the intake manifold cracking. i don't think anyone here has experienced a manifold breaking or cracking under pressure yet, but it shouldn't be dismissed either.

also, Golden Eagle makes a L15 aluminum intake manifold which is perfect for turbocharging which was good to some 500 hp or so on Bisi's build. a bit overkill for 5-6 psi, but something to consider as a back up in case you turn up the boost.

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post #5 of 12 (permalink) Old 03-15-2017, 03:21 PM
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The sprintex "is the intake manifold". It replaces it.

So might have some attention there.
My tubo runs 8 PSI with stock manifold, but it's intercooled on heat purposes.
But i don't think you'll have trouble with your idea

!!Let the fun begin!!Vuooooooom Pxxx xxxxx xxxx
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post #6 of 12 (permalink) Old 03-15-2017, 05:38 PM Thread Starter
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Originally Posted by Aceryl View Post
The sprintex "is the intake manifold". It replaces it
So might have some attention there.
My tubo runs 8 PSI with stock manifold, but it's intercooled on heat purposes.
But i don't think you'll have trouble with your idea
This is another subject, but I cannot resist asking you now.

What is the maximum boost the stock system (injectors, ECU, fuel pump, etc.) can manage whitout any modification?

At 3000 rpm? At 6000 rpm?
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post #7 of 12 (permalink) Old 03-15-2017, 07:17 PM
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Quote:
Originally Posted by Serge View Post
This is another subject, but I cannot resist asking you now.

What is the maximum boost the stock system (injectors, ECU, fuel pump, etc.) can manage whitout any modification?

At 3000 rpm? At 6000 rpm?
You're out of luck, if you plan to run any boost with the stock system as you describe it, including the ECU, but here's an example of a turbo kit running all stock (except for ECU is KTuned)

Bolt on turbo?

2013 Honda CRZ EX PWP w/navi CVT | Litz's 2013 PWP Build Thread
Sprintex | Mugen | Takeda | Heko | DIY: CVT with 6-Speed shift boot
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post #8 of 12 (permalink) Old 03-15-2017, 08:15 PM
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Quote:
Originally Posted by Aceryl View Post
The sprintex "is the intake manifold". It replaces it.

So might have some attention there.
My tubo runs 8 PSI with stock manifold, but it's intercooled on heat purposes.
But i don't think you'll have trouble with your idea
i had a complete lapse in thought, you sir are correct on the Sprintex

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post #9 of 12 (permalink) Old 03-16-2017, 04:19 PM
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Quote:
Originally Posted by Serge View Post
This is another subject, but I cannot resist asking you now.

What is the maximum boost the stock system (injectors, ECU, fuel pump, etc.) can manage whitout any modification?

At 3000 rpm? At 6000 rpm?
Max psi you can do is 9psi, but you are at the very limit. But it's not all about how much psi the stock internals can handle.

The stock internals can have 200hp to run safe. So 9 psi (wouldn't advice running at 9 psi. 8.5 max) or 200hp. just whichever comes first.

There are more things to consider, but the 200hp and 9 psi are the most important.
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post #10 of 12 (permalink) Old 03-17-2017, 05:57 PM Thread Starter
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Max psi you can do is 9psi, but you are at the very limit. But it's not all about how much psi the stock internals can handle.

The stock internals can have 200hp to run safe. So 9 psi (wouldn't advice running at 9 psi. 8.5 max) or 200hp. just whichever comes first.

There are more things to consider, but the 200hp and 9 psi are the most important.
Hi,

As I said previously, my goal is only 5 psi. It's definitely more easy than 8 or 9.
I am not interested to buy a bolt-on kit, I want to build my own system.

I might do it in stages and even limit it lower at the beginning while I learn and integrate the required mods.

I will open a new thread about it but I need to do my homework first and search what was said before on this site.
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