i am in the middle of some big mods and am going for the reverse inlet manifold, can anyone give me a few ideas in the best way to do it, ive got a spare manifold to cut up and salvage, i just need to know the best way to go about it before i start, cheers phil.

 

pennine subaru would be the ones to speak to about it, speak to Chy.

 

Everyone I know who has done the rotated inlet mod says its not worth the hassle

 

Same here mate.

 

i have heard that too, but im moving the turbo and will need the inlet reversing just for ease of piping, if anyone has got any pic i would appreciate it, cheers phil.

 

I have a rotated turbo setup and my inlet is as normal. How can the pipework get in the way ???

 

i will be mounting the turbo in the front middle running the turbo straight to the inlet, so no need for an intercooler as it wont be doing anything, its a big job but im sure it will be worth it and look amazing.

 

Seriously, no need for an intercooler? So your turbo isn't going to be compressing any air? I totally go with your idea of getting the inlet tract as short as it can be, but no charge cooling at all? IIRC Andy F had a similar idea a while ago, I don't know how it went, but I'd be interested to know how you're going to manage charge temp?

 

Andy ran it in pure methanol with that setup IIRC so charge temps were not as much of an issue.

 

i didnt think the air would be that hot, as it was going to be drawn straight in from the front of the engine bay. i have seen the pics of andys, and thats what i was going to do, i didnt realise he ran it on pure menthol, i havent done any chopping yet so i may just put the turbo in the drivers side of the engine bay, that way i can still have an intercooler, ill stil have to use some sort of pump for returning the oil, any ideas what to use.

 

Why not just use a banjo bolt for a sump plug and return the oil through it?

 

I am running a Rotated inlet setup on a V3 Type R, the gains are minimal its more of a engine bay dress up factor

 

I hate to be the one to say this but have you really thought any of this through? Do you actually know what you're doing?

I suggest the very fact that you've got to ask about the reverse inlet means that you don't.
Firstly if you think you can run a turbo without any kind of cooling of that charge air before it gets to the throttle body think again.

Compressed air gets hot, and will need cooling unless as above you're running pure methanol.

Personally I wouldn't bother. if you're after big power, go rotated turbo, GT30/GT35. I went reversed manifold and rotated turbo last year. I'm now building a new car and I'm sticking with the inlet manifold in the stock position because it really was NOT worth the hassle.

Sorry to sound blunt but I'd thought i'd spell it out for you to save you loads of time money effort that will essentially be wasted,especially if your not going to cool the charge air.

 

ill be the hero of the hour

Subaru impreza turbo reverse inlet manifold on eBay, also Engine Tuning Parts, Performance Tuning Parts, Car Tuning Styling, Cars, Parts Vehicles (end time 17-Dec-08 12:04:32 GMT)

and who ever was talking about speaking to chy, they wernt lying

 

I think that's where you've made your first mistake - the difference between the warmth of underbonnet air being drawn into the turbo, compared to if you could just draw in fresh air from outside is virtually negligible compared to the amount of heat the turbo itself puts into the charge - wherever you site it and however you engineer a cold air intake.

If you want more flexibility with your intake route then a chargecooler is one way of doing it, just stick your cc rad up front and then run fairly narrow water pipes to your cooler body itself, wherever you want it. I often thought a nice tidy job would be a whacking great turbo in the standard position, running straight into the side of a monster chargecooler in the TMIC position, round one 90 degree bend straight into the inlet manifold. In fact if you were doing a custom chargecooler, you could see about casting it with fins all over the top side so you'd have passive radiation of the cc body at standstill and gain the benefit of additional cooling while on the move. All you'd need down the front would be an extra rad.

In fact, why the hell doesn't someone start making these?

 

ooh you have been busy, thanks for all your replies, i have done small mods for some time now, on rx7's and now my impreza, but have never done anything as big as im going for now, i saw that creation of andy f's and thought id try something like, i didnt realise the air would still be hot when its gone on a shortend journey to the inlet manifold (sometimes you dont see the obviouse), hey ya learn something everyday, i have looked at things again and will go for the turbo in the front drivers side, straight in the intercooler, sorry for sounding like a complete novice, im just asking questions before i start it, back to what PLAYSATAN said, would i be able to run the gravity oil return on the turbo to a banjo on the sump drail, instead of using a motor, thanks phil.

 

Why on earth do you need to mess about with the oil lines?
On my rotated turbo kit I just take the oil feed for the turbo from the cylinder head and the drain from the turbo goes into the bottom of the cylinder head and is gravity fed. Just use these, you'll be fine!!

 

As above, if rotating the turbo just use the original drain. Only look for alternatives if you are moving the location of the turbo.

Top tip - if you plan on doing any of the above work get it priced up first. You may get a fright half way through if you don't.

 

Going rotated is a lot more cash than you think As for air not getting hot , you would not believe the heat generated from the gt35r

 

sorry again, i ment drivers side FRONT near the bumper not in its original position, hense the reason im asking about the gravity oil return being plumbed into the sump,

 

heres one my mate did.

....he has done a few....but charges 200 exchange.

 

A bit off topic I know, but has anyone ever done one of those 'clean' engine bays, where you literally have nothing but an engine in there and everything else is hidden under boxed out wings, i.e. no pipes, wires, hoses etc. nothing on show except an engine you could eat your dinner off...anyone done that on an Impreza? I've seen it on a Mk1 Escort.

 

A bit like andy f's methanol work of art?

 

thats the one i was going to create, but im going a diffrent way now, thanks for the pic.

 

I think mine is a reasonably clean and uncluttered engine bay. The turbo is mounted down in the front bumper...

 

Also, what about Zen's previous 1995 Type RA Time Attack steed's installation?...




What on earth is that big bulbous silver thing on the right, between turbo and TB - where you'd expect an IC to be plumbed in?! IS it a TMIC?! Where are the fins? - it's an enclosed structure! I'm confused

 

It's a charge cooler. Runs a water jacket round the outside of the air charge. Water is a far better heat exchanger thant air so a small charge cooler is more efficient than a large intercooler.

 

Of course it is! Never seen a cylindrical one like that though, lol.

 

Also white warrior, here is a picture of my front mounted turbo if it's any help. The turbo is mounted pretty low but there is still enough of a drop to the sump for the oil drain. If you do run into problems with the oil backing up, you can use an in-line oil scavenge pump which is a cheap and easy fix.

 

Really nice setup there fella.

Looks like its been finished really well.

Got any shots from under the car?