Intake Manifold Questions

Fuel Supply & Ignition Systems

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TJ530
Posts: 46
Joined: Wed Aug 29, 2012 1:21 pm

Re: Intake Manifold Questions

Post by TJ530 » Thu Nov 24, 2016 4:22 pm

Clonebug wrote:My feeling is you are making it more complicated than needed with ITB's.
Just run a single TB and put the boost to it.
My 1679 has a custom homemade intake shaped like the stock intake but a little larger tubing due to matching the CB FI inlets outside diameter. I think it is either 1 5/8ths or 1 3/4 inch tubing. That is the largest that will fit without interfering with the alt stand and having to flatten the tubing to fit underneath it.
I have great low end and good top end.
The way to more HP is in RPM's I have found. If you limit rpm to 5000 you limit hp. Turn it up to 7000 rpm you will gain a lot.
Main reason for not going with a single throttle body is due to packaging. I am planning on using a center mount fan shroud with FJCs Insert which is gonna make a single TB real hard to do. Also trying to gain some torque with a dual plane manifold

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ps2375
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Re: Intake Manifold Questions

Post by ps2375 » Thu Nov 24, 2016 7:54 pm

TJ530 wrote:Also trying to gain some torque with a dual plane manifold
Not a V8.

TJ530
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Joined: Wed Aug 29, 2012 1:21 pm

Re: Intake Manifold Questions

Post by TJ530 » Sat Nov 26, 2016 6:49 pm

ps2375 wrote:
TJ530 wrote:Also trying to gain some torque with a dual plane manifold
Not a V8.
True but the same concept applies.
So far I've got dual 45mm Throttle Bodies leading into a unknown volume plenum then into 18.5" runners from plenum to intake valve. That will give me a boost in cylinder filling at 3750rpm using the 4th wave harmonic.
Any other inputs?
Last edited by TJ530 on Sat Nov 26, 2016 7:02 pm, edited 1 time in total.

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ps2375
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Re: Intake Manifold Questions

Post by ps2375 » Sat Nov 26, 2016 6:59 pm

TJ530 wrote: So far I've got dual 45mm Throttle Bodies leading into a unknown volume plenum then into 23.5" runners from plenum to intake valve.
No deck lid? That's a bunch of hardware. :shock:

TJ530
Posts: 46
Joined: Wed Aug 29, 2012 1:21 pm

Re: Intake Manifold Questions

Post by TJ530 » Sat Nov 26, 2016 7:02 pm

Sorry ran the numbers wrong.lol Got a Ninja edit in there :wink:
Will have a decklid and one of those whale tail wings to fit everything. :twisted:

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sideshow
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Re: Intake Manifold Questions

Post by sideshow » Sat Nov 26, 2016 8:30 pm

TJ530 wrote:...So far I've got dual 45mm Throttle Bodies leading into a unknown volume plenum then into 18.5" runners from plenum to intake valve. That will give me a boost in cylinder filling at 3750rpm using the 4th wave harmonic...
I can't see your picture
Yeah some may call it overkill, but you can't have too much overkill.

dragvw2180
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Re: Intake Manifold Questions

Post by dragvw2180 » Sat Nov 26, 2016 9:10 pm

Since you are only after 100 hp per liter you are talking 210 hp correct ? I think almost any system you make will exceed that goal while under boost. Heck I think you could get that using a stock setup with your EFI system on your 2110. Keep it simple as possible.

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