Random question on itb's

[kingcruizer]

I'm planning on building a itb set up for my supercharged engine using e36 m3 bodies. I have the itb's and have had the flanges made to suit both head and itb's. Clearance won't be an issue regarding the brake booster as I will be installing a bias box but after looking and many measurements the itb's would fit in IF they are upside down (with standard booster in place)

My question is- would they work upside down.???

I've had a flick through the net and have read in various places they do but I don't want to commit any welds if NOT.

Also with them upside down they look alot cleaner in the bay. No vacume pipes on display etc etc

Your thoughts please

Clive

[Coyote_ar]

As long as you keep the original flow direction, position wont be an issue.

Keep in mind that having injectors, fuel rails, and piping on the bottom, although nice looking, will be a PITA to work if you need to tinker with that ...

But regarding functionality itself ... none of the parts depend on gravity if thats what you are worried about.

PS: your wheels are SO F*CKING COOL!!!

[JAFF]

iv had many years in the throttle body world they will be fine mate

[kingcruizer]

By flow direction were talking about the injectors firing down to the valves not to the top??

[Mikey_Boy]

Be very careful here - injector positioning is designed to be quite specific for a few reasons outside the access reasons given above:

1. The fuel 'cone' that comes out of the injector is targeted at a very specific place on the intake valve to make the most of intake air / fuel mixing to give best combustion - the port shape and injector position go hand in hand..
2. This injector targeting also helps with driveability and performance
3. Injector targeting (and associated wall wetting) will be very different and probably wrong!

Proceed with caution - the injectors are in the place they are for very good reasons!

Good luck...

Mike

[kingcruizer]

^^ this is what I've been thinking. As for the injectors, I will leave them alone but turning the itb's upside down will make life easier for fitting and building a plenum chamber.

Clive.

[fowler]

clive PM OAKEY as he is the only one i know of locally who has got ITB running

[HairyScreech]

yes injector position will be effected, normally the intention is to fire down the port, you might have some trouble with the injectors wetting the walls of the port and the fuel remaining liquid.

although as you are going for forced induction your intake are will be warmer and assist the atomisation of the fuel.

theres no hard and fast rule on this, you might just have to suck it and see, it might work perfectly or it might fuck up.

most likely it will be ok, perhaps with slightly increased emissions.

any way to make the fitment reversible if its a problem?

[kingcruizer]

yes injector position will be effected, normally the intention is to fire down the port, you might have some trouble with the injectors wetting the walls of the port and the fuel remaining liquid.

although as you are going for forced induction your intake are will be warmer and assist the atomisation of the fuel.

theres no hard and fast rule on this, you might just have to suck it and see, it might work perfectly or it might **** up.

most likely it will be ok, perhaps with slightly increased emissions.

any way to make the fitment reversible if its a problem?

im trying to build it all so it fits in a stock engine bay. at the mo it can all be reversed as im looking at all angles. thermostat housing is the main issue, its rather chunky, thats why i was thinking about putting the itbs upside down.
a crude way of doing it i know but using a lazer pen placed in the injector hole shows me what angle the itbs need to be and it all fits upside down. thats with the injector in the itb.

question is... will they work there?? there directed at the valves so surely there should be no issues. another option would be to have collers made and welded in closer to the head where the stock injectors are as oem

if this works then the stock brake booster can remain but as ive stated, i will be using a bias box so space is no issue.