Anyone ever tried DIY individual throttle bodies? - Page 3

November 23rd, 2005, 04:05 PM

Quote:

Originally Posted by tfreer85

Yeah you have a point, that gets rid of using the set of 4 ITB setup. Any opinion on running 2 TB's with 3 runners? I'm really curious about converting the Triples to FI seems like it would require the least amount modification.

Tyson

Well for one you would not be using ITB's in IMO. I've alway thought that ITB's are an atractive way to go because in my mind they are intended to be used an a true IR setup.

Why even bother using 2 TB's on 3 runners?? Why not just a single big one? It would be the least amount of work.

Isk

PUSHER · November 23rd, 2005, 05:33 PM

The angles and lengths on the runners to get 3 into 1 throttle body would suck allot and wouldnt be that efficient, plus I dont know if a bike's diameter throttle body would be big enough. Whats wrong with buying 2 sets of ITBs and using 6?

tfreer85 · November 23rd, 2005, 05:49 PM

Quote:

Originally Posted by PUSHER

The angles and lengths on the runners to get 3 into 1 throttle body would suck allot and wouldnt be that efficient, plus I dont know if a bike's diameter throttle body would be big enough. Whats wrong with buying 2 sets of ITBs and using 6?

Nothing is wrong with buying two sets, I might try it out. if it goes wrong I'll just install them on my POS Honda. So I've narrowed it down to the 2 sets of motorcycle or converting the Triple carbs for FI. Does anyone have any information on carbs converted to handle FI??

Tyson

johnc · November 24th, 2005, 09:02 AM

Quote:

The angles and lengths on the runners to get 3 into 1 throttle body would suck allot and wouldnt be that efficient,

Wouldn't they be remarkably similar to the factory OEM intake manifolds? Considering the factory parts work well until you start pushing past 250hp (67% hp more then stock) I think they are pretty well designed.

johnc · November 24th, 2005, 09:04 AM

BTW... http://www.twminduction.com/Throttle...BodySU-FR.html

tfreer85 · November 24th, 2005, 03:55 PM

Quote:

Originally Posted by johnc

BTW... http://www.twminduction.com/Throttle...BodySU-FR.html

Yeah I saw that, but at $1450 for an upgrade that can only support up to 160hp (unless you upgrade injectors) and not including an ECU or wiring harness seems fairly expensive in comparison to what your are getting. Definately still think they are a very cool product.

Tyson

November 24th, 2005, 09:43 PM

Here's my idea on DIY - ITBs ...

Using 6 small Honda D-series [D15 used in most Civics] throttle bodies, mounted cleverly, and with an ingenious throttle actuation design, could prove quite gainful. The manifold itself would be designed around this TB setup idea.

Now, for the most descriptive way to relay this idea to you ... pictures.

Like it said in the first image, there will be a balance tube, which will most likely also house the MAP sensor to accurately monitor incoming air, unless I end up running an AFM or MAF setup [unlikely]. Also, the balance tube setup could be used as a vacuum source for power-assisted braking systems, or anything else that needs vacuum.

By pulling on the throttle linkage, all 6 TBs will open at the same time [the use of threaded shafts, knuckles and joints would be used for adjustability]. I'm actually not sure which direction Honda TBs open, so this is a VERY RUDIMENTARY sketch of how it will work. If they open opposite of the above, the setup will be reversed, so still pulling the throttle to the left [in the pics] will open the TBs. I hope that made sense.

Then, only one TPS would need to be installed on one TB [most likely the furthest left TB in the pics]. Fuel injectors would be in he stock manifold's locations.

So far, I don't see any inherent flaws. Let me know what you guys think.

-Dave-O

November 24th, 2005, 11:10 PM

It's been a while for me but that looks/sounds like what I was planning on. On thing I noticed in your posts is that you mentioned that you would be using an E31, E31's won't accept a N47 manifold W/ Injectors. You will need to use a FI head or do something about the injectors.

Why not use the injectors off the bike? I know on some of the newer CBR's they have some bad a$$ injection setups.

What is the size of the TB's? Oh, I see they are 54mm. That's BIG. Is that right? I would think 54mm on even a 3.1 would be too much. But on a SBC!!!

Isk

1 fast z · November 25th, 2005, 09:54 AM

Or you guys could always buy one of my units

1 fast z · November 25th, 2005, 09:57 AM

My system uses a Pot type 240sx TPS. My system also uses STOCK lingkage, so you can use your stock linkage bar, so NO modifying. ALL directy bolt on mechanicly anyways. This system has to be used with a MAP style based ECU, ie. Megasquirt, SDS, etc. TB's are 46mm, which will flow ALOT more than a DCOE 45, as there are no chokes

rusty260 · November 25th, 2005, 09:15 PM

does anyony have any sound clips, would love to hear what it sounds like,

oinojo · November 25th, 2005, 09:25 PM

hey guys i thought you guys would wanna hear what ITBs sound like on a 4cylinder.

http://videos.streetfire.net/Player....AD7020C61A&p=0

this is Pacman from www.honda-tech.com
he sounds like a dumbass but he knows his stuff...

oinojo · November 25th, 2005, 09:28 PM

Quote:

Originally Posted by 1 fast z

Or you guys could always buy one of my units

how much for one of your units?

1 fast z · November 26th, 2005, 12:54 AM

For everything, IE. Air Cleaners, Velocity stacks, etc. DIRECT MECHANICAL bolt on, is about 1600.00. Price does vary with Runner size, etc.

November 23rd, 2005, 05:33 PM	#42
PUSHER Member Join Date: Jul 2003 Location: Austin/Abilene Texas Posts: 224	The angles and lengths on the runners to get 3 into 1 throttle body would suck allot and wouldnt be that efficient, plus I dont know if a bike's diameter throttle body would be big enough. Whats wrong with buying 2 sets of ITBs and using 6? __________________

November 24th, 2005, 09:04 AM	#45
johnc Administrator Join Date: Dec 2000 Location: La Habra, CA Posts: 6,592 Blog Entries: 1	BTW... http://www.twminduction.com/Throttle...BodySU-FR.html __________________ John Coffey johnc@betamotorsports.com BetaMotorsports, LLC Once more unto the breach, dear friends, once more, Or close the wall up with our HybridZ dead! In deciding for those who cannot decide, Or educating those who will not listen, There's nothing so becomes a man As modest stillness and humility; But when the blast of indecision and ignorance blows in our ears, Then imitate the action of the tiger: Stiffen the sinews, summon up the blood... ...Follow your spirit, and upon this charge, Cry "God for HybridZ, Datsun, and Horsepower!"

November 25th, 2005, 09:15 PM	#51
rusty260 Junior Member Join Date: Nov 2004 Posts: 16	does anyony have any sound clips, would love to hear what it sounds like, __________________ Save the 2+2.

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November 24th, 2005, 09:43 PM	#47
Dorifto Guest Posts: n/a	Here's my idea on DIY - ITBs ... Using 6 small Honda D-series [D15 used in most Civics] throttle bodies, mounted cleverly, and with an ingenious throttle actuation design, could prove quite gainful. The manifold itself would be designed around this TB setup idea. Now, for the most descriptive way to relay this idea to you ... pictures. Like it said in the first image, there will be a balance tube, which will most likely also house the MAP sensor to accurately monitor incoming air, unless I end up running an AFM or MAF setup [unlikely]. Also, the balance tube setup could be used as a vacuum source for power-assisted braking systems, or anything else that needs vacuum. By pulling on the throttle linkage, all 6 TBs will open at the same time [the use of threaded shafts, knuckles and joints would be used for adjustability]. I'm actually not sure which direction Honda TBs open, so this is a VERY RUDIMENTARY sketch of how it will work. If they open opposite of the above, the setup will be reversed, so still pulling the throttle to the left [in the pics] will open the TBs. I hope that made sense. Then, only one TPS would need to be installed on one TB [most likely the furthest left TB in the pics]. Fuel injectors would be in he stock manifold's locations. So far, I don't see any inherent flaws. Let me know what you guys think. -Dave-O

November 24th, 2005, 11:10 PM	#48
iskone Guest Posts: n/a	It's been a while for me but that looks/sounds like what I was planning on. On thing I noticed in your posts is that you mentioned that you would be using an E31, E31's won't accept a N47 manifold W/ Injectors. You will need to use a FI head or do something about the injectors. Why not use the injectors off the bike? I know on some of the newer CBR's they have some bad a$$ injection setups. What is the size of the TB's? Oh, I see they are 54mm. That's BIG. Is that right? I would think 54mm on even a 3.1 would be too much. But on a SBC!!! Isk

November 25th, 2005, 09:54 AM	#49
1 fast z HybridZ Supporter Join Date: Dec 2004 Location: Phoenix, AZ Posts: 1,108	Or you guys could always buy one of my units

November 25th, 2005, 09:57 AM	#50
1 fast z HybridZ Supporter Join Date: Dec 2004 Location: Phoenix, AZ Posts: 1,108	My system uses a Pot type 240sx TPS. My system also uses STOCK lingkage, so you can use your stock linkage bar, so NO modifying. ALL directy bolt on mechanicly anyways. This system has to be used with a MAP style based ECU, ie. Megasquirt, SDS, etc. TB's are 46mm, which will flow ALOT more than a DCOE 45, as there are no chokes

November 25th, 2005, 09:25 PM	#52
oinojo Member Join Date: Jul 2005 Location: oceanside Posts: 204	hey guys i thought you guys would wanna hear what ITBs sound like on a 4cylinder. http://videos.streetfire.net/Player....AD7020C61A&p=0 this is Pacman from www.honda-tech.com he sounds like a dumbass but he knows his stuff...

November 26th, 2005, 12:54 AM	#54
1 fast z HybridZ Supporter Join Date: Dec 2004 Location: Phoenix, AZ Posts: 1,108	For everything, IE. Air Cleaners, Velocity stacks, etc. DIRECT MECHANICAL bolt on, is about 1600.00. Price does vary with Runner size, etc.