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Quad throttle bodies for 4EFTE
https://ausmini.com/forums/viewtopic.php?f=23&t=27703		 Page 1 of 2
Author:  HPDesign [ Tue Feb 06, 2007 12:26 pm ]
Post subject:  Quad throttle bodies for 4EFTE
I have been doing an engine conversion in a mini of a EP91.

I broke the Throttle Sensor (Matt know's my pain) He even told me to take it off but I forgot??? :( :( :(

I am putting a TD04 (or similar) on it anyway. Room will be real tight with the stock inlet and I was thinking about Quad throttle bodies.

I can weld and was just going to make some up however. I thought I would ask if you know of any quad throttle bodies that are EFI that bolt on? or has anyone else here tryed making their own up?

I have posted it on AUS Starlet to see if they know to as well.
Author:  JC [ Tue Feb 06, 2007 12:47 pm ]
Post subject: 
It would be interesting to see how you go. I'm not fimilar with any quad throttle body set ups (manifolds) that bolt to the EFE head. I know toyota made some quads for the 4A series motor but I would suggest the cylinder head port spacing is different to the 4/5EFE.

If quads where to be fitted they would need to be mounted vertically I reckon which means a 90 deg bend in the (very short) inlet mani. The 90 deg turn isn't so bad as the air is being forced through. I would anticipate that getting the mani top turn to meet the head might be tough (considering you need to get injectors and a fuel rail in there somewhere too).
Author:  Blokeinamoke [ Tue Feb 06, 2007 12:48 pm ]
Post subject: 
Would a starlet engine have enough airflow to do justice to quad throttle bodies?
Author:  JC [ Tue Feb 06, 2007 3:08 pm ]
Post subject: 
Just ask Dean.......

Short answer, absolutely.

HP, keep in mind that THE most powerful 4efte uses a custom plenum with a single, albeit somewhat large, throttle body.
Author:  HPDesign [ Tue Feb 06, 2007 3:29 pm ]
Post subject: 
I am aware that Dean uses a big single. I thought that I might give it a shot But the starlet guys are boo hoo'ing it. Quad throttle bodies give a quicker responce and more even delivery through experince, I am keen so is anyone knows where to get a set of 50-52mm quads cheap?
Author:  minstar [ Tue Feb 06, 2007 5:19 pm ]
Post subject: 
Most Jap sports bikes after say 2003 were running EFI so I think you would be able to get something off them. My EFI GSXR had I think from memory 42mm (Don't quote me) throttle bodies. Also man I told you to remove the TPS!!! :lol: :lol: :lol:

Good to see you have started...I'll have to have a look at some stage. Sorry I haven't got back to you about the vid just changed jobs, had a kid and found out I have a cerebral aneurysm..!

Cheers

Matt
Author:  9YaTaH [ Tue Feb 06, 2007 6:20 pm ]
Post subject:  Ouch...
minstar wrote:
Most Jap sports bikes after say 2003 were running EFI so I think you would be able to get something off them. My EFI GSXR had I think from memory 42mm (Don't quote me) throttle bodies. Also man I told you to remove the TPS!!! :lol: :lol: :lol:

Good to see you have started...I'll have to have a look at some stage. Sorry I haven't got back to you about the vid just changed jobs, had a kid and found out I have a cerebral aneurysm..!

Cheers

Matt


Good to see you ragging the poor guy when he's down Matt....hey! then again, its the Aussie way!! I thought about calling in last Saturday Hugh, but then I had a minor scare with the brake booster on the dunnydoor (as in no boost and very hard pedal :oops:

Matt all joking aside, I sincerely hope your aneurysm can be treated mate....my Mum has one that is inoperable :(
Author:  NoMoreMinis [ Tue Feb 06, 2007 6:29 pm ]
Post subject: 
I doubt quad throttles will give better response when you have a big turbo in your inlet tract wanting to be spooled up.......

I uploaded these pics on the starlet forums:
Image

it's a DIY that someone rigged up on their NA 5efe, using a chopped standard manifold, some GSXR quads, some radiator hose, cable ties and leccy tape... :)
Author:  minimetoy [ Wed Feb 07, 2007 7:20 am ]
Post subject: 
I am lurking in the background watching these posts as i am currently in possesion of a set of bike quads. I have been considering my options and have come up with an idea (that i hope will work) that will make the engine bay a bit more compact.

First i intend to rego the car and then this change will be my afternoon hobby.

Dan
Author:  Archangel007 [ Wed Feb 07, 2007 8:44 am ]
Post subject: 
Hey HP,

Welcome to the "I broke my TPS because I forgot to take it off club" - there are a few of us in the club, so dont worry.

Matt - shocked to hear of your medical condition, I sincerely hope all goes well and you have a speedy recovery!

Quad throttle bodies - if you can do it, yes go ahead. Depending on how you design it, it may free up some space in what is a compact engine bay. They should enhance throttle response and also top end revability depending on the turbo, IC and pipe route lengths etc, but all being equal, bottem end repsonse should be better but may impact on off throttle idle.

4AGE would suit, as would Nissan GTi-R quads. Bike ones would do the job as well.

Cheers,
Tricky
Author:  JC [ Wed Feb 07, 2007 9:45 am ]
Post subject: 
HPDesign wrote:
Quad throttle bodies give a quicker responce and more even delivery through experince


Is that in a naturally aspirated format?

HPDesign wrote:
I am keen so is anyone knows where to get a set of 50-52mm quads cheap?


You won't find bike carbs that big. Honestly, I reckon you should try the gti-r set up as they are a turbo charged set up and you get a lightweight, cast plenum to match. You may also find that the TPS may be fairly easy to get working with whatever ECU you are going to use. In addition, they flow more than enough air for the sr20's to put out 500hp. They can be sourced fairly cheaply (say $300) as opposed to some R1 EFI TB's at 1k plus manifold and plenum.
Author:  Baracade [ Wed Feb 07, 2007 3:08 pm ]
Post subject: 
I agree with JC the GTIR for the SR20 had Quad's that are fairly cheap to buy.

If anyone is intrested in custom inlet manifold with a big throttle body.. There is one extra for sale identical to mine...

Just pm me if your intrested.

cheers
Author:  miniboy1962 [ Wed Feb 07, 2007 3:55 pm ]
Post subject: 
I just rang up adelaide jap imports and got quoted $695 + Freight for a set of Quad Throttle Bodies for a Gti-R. Anyone know cheaper options?
Author:  borgy [ Wed Feb 07, 2007 6:18 pm ]
Post subject: 
i can get you Hayabusa quads for $600 inclusive straight off a wrecked bike...... They are 52mm am the mouth then taper to 50mm at the butterflies then taper to 48mm at outlet or valve side....... Injector ports are down stream of the butterflies........ Put them on mine when it was n/a and only made 4 or so hp at top end with a big pelenum up stream of butterflies....... When i went boost though they definatly helped with air flow........... :lol:
Author:  HPDesign [ Thu Feb 08, 2007 12:19 am ]
Post subject: 
$600 for busa quad's is a good price. I have to say that at that price I am tempted, but then I have to make them fit, and stuff around, I think it all sounds like maybe a project for when it's up and running, I might just get a big throttle body off a Skyline/fairlady and make a slim manifold up with a slightly bigger than stock plennum
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