ITB's on a V6

[todas**t]

low end should be really good and responsive just your fuel mite be a issue lucky the petrol price gone down a bit thats if u give it to the right tuner...

[TODA AU]

Any negatives to it?
Being 2.5L I assume low end power should never be an issue
Even with only 2 litres now it still pulls from idle quite easily in higher gears and all
Regardless low end power isn't too big of a concern
But anything else bad about them?

The if's...
If you don't use quality parts, the thing will be awful to drive.
If the throttles are cheap & nastly, you'll have high idle problems.
If the linkages are cheap & nasty, you'll get sticking throttle problems.
If the lengths are wrong, it won't perform as well as it could.
If the manifold is cheaply fabricated, it'll probably look awful.

& the but's
But the bonnet used to close...
Be sure it's all going to fit & there is available space.

[STOCK]

Wooohooo V6 ITB Lancer.. thats gonna be interesting!!! post up some pics when its done!!

[EfiOz]

Smal, high revving V6's make an awesome sound!!

[spetz]

Well I am hoping it'll be completed this year
Along with cams, internals, labour, gearbox mods, ECU it's a lot of money

Toda AU, can you make a ITB setup?
Space might be somewhat of an issue
But being a V6 I assume I could just sit everything on the rear bank? Like the intake manifold is now: (sorry dodgy camera phone pics)

And one of the actual car:

[fishman]

full sick. hurry up and get it running so you can see how it performs against some of the honda's around!

[spetz]

hmmm
I am sure for what the engine will be it wont perform that greatly against Honda's as it weighs quite a bit
1120kg with no fuel and no one inside

But as it is, it's quicker than DC5R's, B16 EG's, etc

Hopefull completion date though is by next summer

[todas**t]

i think u should register onto a v6 forum and ask them about the ITB..more chance there.

[d15z1SUX]

make a cool ram air induction thingy like top secret did with their vq35 hehe.

[TODA AU]

Toda AU, can you make a ITB setup?
Space might be somewhat of an issue
But being a V6 I assume I could just sit everything on the rear bank? Like the intake manifold is now: (sorry dodgy camera phone pics)

We can,
The issues I can see that will be a problem straight away with yours in clearance.
Not only will you have issues fitting all throttles to the rear & getting adequete airflow to them.
The major problem I can see is runner spacing.
Placing the throttles to the rear, the sapcing between them will be minimal at best.
It may be that a machined billet peice with the 6 throttles on the same shaft would be the most cost effective means of achieving multi throttles.
This is not ideal as there can be issues with machining accuracy & the ability to get the idle down to an acceptable level.
Another alternative may be to siamese to intake runners where to runners share the same throttle.
This would give greater spacing between the throttles to allow for lingages etc.
FWIW: Normally a V6 would use a vertical set up as pictured earlier (Jenvey) in a mid engine set up where vertical clearence is not such an issue.
Eg: Honda NSX.
Or a cross ram type system in front rear drive (North~south) engine config where bonnet clearence can be a problem.


Such as pictured above.
TODA manufacture these for a few GT300 teams using the VQ35 engine.

In any case,
Though it can be done, with a transverse mounted V6 with little vertical clearence. To make something that works well, it is going to be seriously expensive.
It's up to you to determine if the gains are actually value for money.

[spetz]

How much is seriously expensive?
What sort of turn around time would you give? I guess I'd need to give you the car with the engine in it wouldn't I?

Would there be a great benefit going 3 throttle bodies (1 per 2 cylinders) over say a twin setup where I have a plenum with a TB on either side?

Can you please give me some pricing, turn around time, and benefits of an intake system?
Where are you located? (how close to yennora are you as well in Sydney?) and also maybe add ECU install and tune charge? I'd say Haltech most likely (or what would you recommend?)

[TR53XX]

As toda said,

you have very small room to work with.

When i was designing my ITB's, i had 33.8 cm to work with. I needed 27 for a tuned length setup.

Go for a tuned setup, otherwise it won't run as well..
Make sure everything is laminar
If you can, taper down as you get to the head (Ie, velocity stack is widest point and it tapers down into the TB, then the TB tapers down to the runner, then the runner tapers down to the head, this contributes to RAM effect, it's hard to get right so make sure you get a pro)

velocity stacks - http://www.velocity-of-sound.com
plenum material - http://www.rossmachineracing.com
get flanges watercut or laser cut.

My itb's are off a suzuki gsx-r 1000, they are 54mm TB's and taper down to 45mm. To give you an idea of my taper, VS is 70mm, port opening 35mm

A good designed intake can give you an intake boost pressure of 10psi. But that is EXTREMELY difficult to obtain, although it can be done.

Do your homework and it should be good . If you got anymore questions, ask heh...

oh yeah - itb's arn't designed for down low, so don't expect anything there...it's all mid/high.. and throttle response is insane.