Fmic Installation "tight" Situation

[QRI05E]

Hey guys, i purchased a hole saw to cut the piping hole under the washer bottle and to be safe i asked the sales person at bunnings for 3 1/2 inch so the FMIC pipes dont scrape or rattle... they gave me a 92mm which turned out to be 3 5/8 inch... I placed the hole saw over where I need to make the hole and it JUST scrapes under the washer bracket.. in other words the hole will clear the washer bottle but just barely... Is that too big?? I know most people use 3" but what other sizes you guys use?

Not bothered returning it

Cheers

[mad082]

that'll be fine. it'll give you a bit of room to play with, should the pipe not sit exactly where it should, and make it a bit easier to feed through without scratching it.

[mad082]

also make sure you move your washer bottle before you cut just in case you are slightly off.

[QRI05E]

Haha thanks Madz... i read in a few threads that 3 1/2 inch was too big im worried that my 3 5/8 hole will be too big too... but it seemed fine when dummy fitting it under the washer bottle... i dunno mate

Cheers

[mad082]

i just used an angle grinder when i did mine. started with a small hole and used a die grinder to make any modifications. hole is square though.

[QRI05E]

Yea might just go and exchange it for a 75mm (3 inch) hole saw...

But few people have said its a tight fit with 3" and others say 3 1/2 is too big... and when i dummy fit the 3 5/8" hole saw it seemed alright... :

[mad082]

if you are worried i'd change it. but its up to you.

[QRI05E]

Yea but i dun want it too tight either...

You think it should be fine with a 92mm hole saw???

[The Dan]

The 3 1/2 will be to big, you should only have 2 1/2 inch intercooler piping anyway. It is a bit of a squeeze but it does fit through on a 3 inch hole saw.

[mad082]

ok, i just went out and did some measuring. if you have the top of the hole saw where the top of a 3" hole saw would sit and just cut the hole there. if you look in the engine bay from the top you will see where the hole will go, and below it is a shelf. that shelf is about 100mm below the top so there is room.

[QRI05E]

Here is a pic of a 3" (75mm) hole saw cut... im pretty sure a 3 5/8" (92mm) will fit in the same position but will just miss the washer bottle... 17mm difference

Cheers

[mad082]

yeah easy. if it does start to look a bit iffy, just move the hole a little bit towards the front of the car.

[QRI05E]

This is the diagram from the HYBRID install guide.. if i raise the center by a few cm it should clear the 92mm hole... lol well lets hope so

I wouldn't want to move the hole so the cross pipe doesn't hit the fan blades which will be clipped.. i think i should save myself the head ache and just get a 75mm hole saw...

Edited May 31, 2006 by QRI05E

[QRI05E]

Any suggestions guys??? should i stick with the 92mm hole saw or get a 75mm hole saw???

Cheers

[mad082]

you lost me there with the fan blade bit. do you mean when you finally punch through are you worried that if the hole was accross any more it might damage the blades? you could just do it when you take the fan out to trin the blades. (easier to take the fan out to get an even cut on all blades as its only 4 bolts)

[QRI05E]

Yea if i was to take the hole any closer to the front it would bring the crossover pipe close to the blades and also throw the mounting bracket out off alignment with the engine head..

Im pretty sure if i follow the HYBRID guide it will all line up sweetly...

[QRI05E]

Hahaha im 100% going to make a detailed DIY Tutorial with pics once i fit the kit to help all the other poor bastards in my shoes lol im hoping it will turn out like this beauty...

[mad082]

what i meant is that the fact that the hole was that much bigger than it needs to be that it wouldn't matter if it was moved slightly. if the hole was a tight fit then it would put the mounting brackets out of place, but as the hole is way bigger than it needs to be, so if it is moved it won't make a difference as the piping would still have quite a gap before it touches the edge of the hole.

[QRI05E]

Oh ok i get it now... Ill see tomorrow if they will exchange it for me.. otherwise im going to use a 92mm hole

[KamikazeR33]

i just removed the bottle n cut the hole through there. altho i have a dif setup to u