Does anyone have access to one of their Turbo's?? I need to know what size tube fits the inlet on the standard C5 turbo. I may have found a filter by chance that has the dimensions to fit directly on the turbo with the extra clearance afforded by my conversion to a C6 pan.

Given I don't typically drive my car in the rain/snow/ect, think there would be any problem running a filter directly on the turbo save for I'd lose the recirculation capability of the BOV's.

Apparently K&N does a custom filter program too, so I might look at having one/some custom made if this works out.

 

I am definantly interested in what you find. I really dont want to run the APS inlets nor do I want to run only screens. A happy medium for me, would be a filter right on the turbo.

 

Well, I'm going to know a LOT more this weekend. The filters I've found are small dual-inlet filters about 6" in diamater, 3.75" high from top to base, and have a 3" ID inlet. There's others available but these caught my eye at my Auto Zone last night.

I'm going to try to get the biggest filter I can put on there, and will be seeing the car this weekend so I'll be tinkering then hopefully. Catch for most C5 guys is going to be how much room there is with and without the batwing oil pan. More to come.

 

Thats what I was going to ask next....how much room difference does the C6 pan have compared to the C5. I will probably be trying a couple options also when I get my kit, so any insight you get this weekend will be great news

 

I dont have the turbos but I do have a C6 pan and wow is there a lot more room to work under there, from looking at the where the turbos are on the APS kit it might be a good upgrade.

 

2.5

 

Are they direct replacements?

 

The only problem with a filter directly on the turbo is that there is not enough room to fit a filter that will flow enough cfm for a 346ci engine at 6500rpm, with BOOST added to it.

The filters you mentioned, based on the size, will not flow nearly enough, and will choke the engine.
It will only flow about 450cfm each, which would support an N/A 346, but not with boost added.
A typical 346ci N/A engine requires about 650cfm at 6500rpm, so add 14psi and you need to double the cfm requirements of the filter.

Just some more info to add to the pile!

 

yes, the only thing is the oil filter will be for a 07+ C6 unless you change the piece from your stock pan that the filter screws onto.

 

Do you REALLY wnat you turbos breathing off the ground? What if you hit rain or water?? There is nothing to shield the filters from the elements. What you might try is to move the filters inside the fenders.

 

Thanks.......may have to keep looking now since that's smaller than I thought it was.

They wouldn't be breathing off the ground. Given the angle of teh turbo's they'd be higher than the oil pan tucked to the sides. Don't know if you've been under an APS car or not, but there's about zero room to work with as far as rerouting somewhere else than where APS has them all the way at the front in front of the intercoolers. As I said before I don't drive the car in the rain, and it would be very easy to fab a small shield to keep water from directly hitting it along the most exposed sections too for those that do. Obviously this isn't an optimal setup, but on a TT car, what is?? What about the STS guys with the filters hiding under the back of the car that's getting cast off from the tires and everything???

Something I was looking at, but it's kind of objective too. For one, I think the rating is subjective given the FI on the car. There's two turbos feeding the motor, so couldn't you say that two 450cfm filters would feed the motor??? I'm looking at getting rid of the APS inlet issues being both the collapsing inlet tubes and the pancake tubes which I'm sure aren't helping either.

The filter I am now SPECIFICALLY looking at trying to make work is the Spectre hpR #889609. It's got a 2.5" ID throat, 5.6 to 3.25" taper and from top to base is 8" long, and has a CFM rating of 705 according to the manufacturer. The length is going to be the killer I think as I don't think an 8" filter will fit on there.

Here's a pic of the filter itself:


Link: http://store.summitracing.com/partde...art=SPE-889609

It's essentially the same thing as a K&N, oil cleaned, warranty, ect.

Even if the filter is more restrictive than the APS dual entry whatever brand it is filter, I think that a slightly more restrictive filter will still negate any power losses seen with collapsing intake ducting on the APS inlet system in the first place.

 

Remember the 350ci engine needs about 630-650cfm or so.
Boost it to 14.7psi and you need 1300.
450+450=900, which would only support about 450 N/A cubes.

Realistically, my goal was to get as large a filter in there as possible without changing too much.
Just making sure there is LESS restriction overall was my main focus.

I, too, think you may have space issues with that filter, but it's worth a try.
The length is the killer.
If you can make them fit, and they flow 700cfm as stated, you will flow total about 1400cfm, which theoretically supports about 750 cubes(or750-800fwhp)
My goal was to put an even larger filter on my car, but since I stuck with the 2.75" hose, I did not have ready access to one.
One thing is for sure, the mods I did to the inlet piping seem to have done the trick.
The car is making about 1.5psi more now at the same evc setting.
I haven't tried turning it up yet, so no higher boost results yet.

One other thing.
Have you actually SEEN the steel reinforced APS hose collapse under vacuum?
I honestly have a very tough time believing that tubing will close due to the vacuum from the turbo.
I mean, it's steel reinforced!!
Tough stuff!
The only possible reason I could see that hose collapsing would be to restriction in the crush section(slightly possible) or restriction at the filter.
I don't know, just curious, as at least one other has mentioned it, but I think it may be one of those unseen urban legends.

 

I wouldn't say urban legend as APS themselves indentified the issue and have a workaround, but refuse to continue R&D to release the fix (the 70mm HARD inlet pipes). I personally don't think they're collapsing completely, but sucking closed to a point of restriction. SpeedyD and VegasRed both ran across the issue on their bigger inch motors, which also leads me to believe that it may be a sheer air consumption issue given they had issues but Orangecrush (or whatever his name was) made over 800 on a 346 at MUCH more boost than either of the above two on a (as reported by Cartek) completely untouched stock APS system.

I got some pictures and talked with the guys putting my motor in last night, and there is about 3" of room between the cradle and turbo inlet at best. No dice on the filters. Not even worth trying. We figured out that if you could put a 45* base on the filter and angle it up towards the motor it might fit, but would be in VERY close proximity to the manifold, which would benefit nowhere due to hot air induction at that point.

So now I'm back to square 1. I think what we're going to do is probably get the car broken in and tuned with the system as stock and see what happens, just to where I can drive and enjoy it for the time being, and then as time progresses this spring I'll start working on a kit to hopefully take care of these issues without being too invasive to the kit as sent. I'd like to delete the pancake pipes that go under the front crossmember and remove all plastic reinforced piping, so we'll see what happens.

 

I agree, just run the engine with the kit as it stands, and go from there.
The changes can come later.
I thought OrangeCrush had the Cartek inlets on when they made those numbers, but I could be wrong.
I faced all your issues a few weeks ago, and went with a simple 2.75" hose straight from the filter to the turbos,over the cradle and thru the a-arm and swaybar, like Atomic C6 had done(he used 3").
Based on my newest datalogs, it seems to have helped.

 

http://forums.corvetteforum.com/1561460802-post117.html

He's very adamant about it being a stone stock APS kit. Unless I missed a development in another thread.

 

Thanks for the link, I just reread it.
Maybe a simple boost controller swap is the trick.
I'm very tempted to try the e-boost2 unit that other's have spoken highly about.
That may, with inlet changes, solve most of my concerns.

 

I'm going to bypass all that. MBC for me. Either a Joe P Pro Z or a Hallman, haven't decided yet.

 

i hope someone resolves this issue. all my piping is getting scuffed up underneath

 

The pancake pipes that go under the cradle? Mine too. I'm not a fan of those, which is why I'm hoping to eliminate as much as possible.

 

Yeah. I rub right where the front clamps connect the rubber hoses to the alum. pancake piping.. Im on stock ride height too.

A little off topic but the way the BOV's are routed back into the system (bypass), can i disconnect it so it blows off into the atmosphere to get some sound out of them? From what I understand, its not a problem since its before the MAF but I want to confirm it before I risk blowing something.