Author Topic: Borla System Variable Cutout Project... (Read 2016 times)

FUBAR · « **on:** September 12, 2006, 02:01:23 pm »

Ok, The plan here is to integrate products from here - http://badlanzhpe.com bought via Finlay at http://www.dynoflow.co.uk into my Yet to be fitted Borla Catback system shown below. here is my original post on the idea

Ok, here's what i'm trying to do:

In the Picture below, the join marked in Red is where the Electric 'Cutout' would go, effectively regulating the exhaust flow from the Passenger side tailpipe and therefore the noise... basically doing the job of all three inserts circled in Blue, but not the one crossed out in Green. This is where Titsy's electronic gizmo that he doesn't know about yet would fit into the plan...

Because the tailpipes are matched in length to all bolt together perfectly A small length of pipe equal to the width of the cutout would need to be removed approximately where the yellow line is.

One of these would be needed:
[img]http://badlanzhpe.com//badlanzpics/DSC00052.JPG\" border=\"0\" alt=\"\" width=150>

As it turns out I'd need a Pair of either These:
[img]http://img.photobucket.com/albums/v223/ryanbudd/89%20IROC/Borlacut-outflangeadapter.jpg\" border=\"0\" alt=\"\" width=150>
or These (circled):
[img]http://img.photobucket.com/albums/v223/ryanbudd/89%20IROC/Borlacut-outweldadapter.jpg\" border=\"0\" alt=\"\" width=150>

To fit to a 3" diameter system. Finlay, it seems that on his website the 3" system and adapters use a 3.5" butterfly to achieve the "Full Flow" he talks about, is this correct

FUBAR · « **Reply #1 on:** September 12, 2006, 02:07:13 pm »

I also would require a control system to allow me to move the butterfly to various preset positions as per my original post below:

Quoting: FUBAR

Imagine you set fully open as the start position because I don't want fully closed...
You could have 2 buttons (momentary type) that when pressed run the motor in the close direction for a preset time to achieve the 1/3 and 2/3 open positions, this would need to be tested in advance and then programmed. You then have a 3rd button (press & hold type) which 'maunally' runs the motor in the open direction to return it too the fully open position.
That way so long as you only press the 2 close buttons when in the fully open position you will achieve the 2 preset settings.

I know how it can work (I think) but don;t know how to build it.

This is where the knowledge of those electronics minded friends comes in because thats where I get Lost.

EDGE · « **Reply #2 on:** September 12, 2006, 03:16:33 pm »

Ryan, are you doing this just for the sound?

Slug had one of these on his 305 TA and it actually went slower down the track.. could have been driver difference but i seem to remeber he said it felt slower too... could have been wronlgy percieved I guess.... get it on before the dyno day and we can do a REAL back to back test

What you'd probably want ideally is a samll subsystem that will allow the butterfly to be fully opened by the time 5000rpm was reached... an rpm dependent system would be cool.... I have my eye on a few rpm dependant things at the moment

EDGE

55starchief · « **Reply #3 on:** September 12, 2006, 03:18:08 pm »

Quoting: EDGE

an rpm dependent system would be cool.... I have my eye on a few rpm dependant things at the moment ;

yup discussed in the other thread mate

Finlay · « **Reply #4 on:** September 12, 2006, 03:29:08 pm »

Quoting: FUBAR

Ok, The plan here is to integrate products from here - [imgs]http://badlanzhpe.com/index.html" target="_blank" rel="nofollow">http://badlanzhpe.com/index.html</a> into my Yet to be fitted Borla Catback system shown below.

JUST TO ADD TO THE FIRST POST

for anyone looking in on the project for the first time

- As supplied by the new UK Sole Importer - Fin At <a href="http://www.Dynoflow.co.uk]www.Dynoflow.co.uk

(In the UK these electric cutouts will be sold as Dynoflow E-CutOuts produced by BadlanzHPE USA)

Now to supply you with the info pics

[img]http://badlanzhpe.com//flanges/DSC00013.JPG\" border=\"0\" alt=\"\" width=150>

[img]http://badlanzhpe.com//flanges/DSC00093.JPG\" border=\"0\" alt=\"\" width=150>

Finlay · « **Reply #5 on:** September 12, 2006, 03:30:51 pm »

mod the size of the image

FUBAR · « **Reply #6 on:** September 12, 2006, 03:51:09 pm »

Quoting: EDGE

Ryan, are you doing this just for the sound?

Basically Yes.
I've no idea if it would have any effect on performance considering where in the system its going and how the Borla system works.

Pod · « **Reply #7 on:** September 12, 2006, 04:17:15 pm »

If I read that right, you're adding a cutout to just one side of the exhaust?

Would it not make sense to install the exhaust as it is and see what it sounds like first?

Finlay · « **Reply #8 on:** September 12, 2006, 04:31:25 pm »

Quoting: FUBAR

Quoting: EDGE
Ryan, are you doing this just for the sound?

Basically Yes.
I've no idea if it would have any effect on performance considering where in the system its going and how the Borla system works.

Once finished I think a retune would be required to get themost out of it. but you should do that with the Exhaust on its own.

philoldsmobile · « **Reply #9 on:** September 12, 2006, 05:13:56 pm »

its TPI mate, so the AFR is always correct, the o2 sensor controlls that in closed loop mode.. the car wont need a retune, regardless of what exhaust is on there..

EDGE · « **Reply #10 on:** September 12, 2006, 05:19:18 pm »

yep.. shouldnt need one at all..

the only thing i dont like about those borlas is that only one pipe is normally opperational, it just doesnt seem right somehow...

when i get the new motor in I'll be going for a single 3 1/2" dump right after the turbo downpipe for use when racing.. I just hope that those little electric cut-outs can handle the heat !!!!!

EDGE

Finlay · « **Reply #11 on:** September 12, 2006, 05:51:51 pm »

Would you like an extended warranty sir

I forget about these new fangled Injection system's.... but how about a better Intake Manifold

CJ-IROCZ · « **Reply #12 on:** September 12, 2006, 07:59:49 pm »

why not dump your cat and put the cutout in its place, thats wha i'm going to do,.

FUBAR · « **Reply #13 on:** September 12, 2006, 08:14:20 pm »

Quoting: Fin170703

why not dump your cat and put the cutout in its place, thats wha i'm going to do,.

Na, even though this is what most people do I want to keep this car on a Cat, basically because you can get Stock fit Hi-Flow cats that don't hurt the performance 1 bit for the 3rd gen and unless it makes it sound like a 4 banger

I don't see the point in not running one.

Quoting: philoldsmobile

its TPI mate, so the AFR is always correct, the o2 sensor controlls that in closed loop mode.. the car wont need a retune, regardless of what exhaust is on there..

This I know

, witht he Borla system being more free flowing than stock even in blocked off pipe mode there's nothing to worry about in blocking off the Pass. side pipe.

Quoting: Pod

If I read that right, you're adding a cutout to just one side of the exhaust?

This is correct, one side of the already Y-pipe merged exhaust so it shows no bias to one bank of cylinders, its basically to do the job of all 3 or 4 of the Optional Borla insert plates in one go, but with the benefit of it being able to adjust it on the fly

F Body · « **Reply #14 on:** September 12, 2006, 08:18:08 pm »

Quoting: Fin170703

why not dump your cat and put the cutout in its place, thats wha i'm going to do,.

Because it will screw the engine management system because it won't be getting any reading from the O2 sensor and go into limp home mode ?

Why do people think that the manufacturers spent millions of $ delevoping the best all round engine control, i.e emissions, performance & economy and it will be better if you just rip part of it out ?

philoldsmobile · « **Reply #15 on:** September 12, 2006, 08:20:14 pm »

the only time cats hurt peformance is if they are blocked... even on cars as fast as Rays (in its LS1 guise) the cats only represented about 0.1 sec in the 1/4 you simply wont feel the difference.

on the other side of the coin, surely we are all responsible to minimise the pollutants in the air? while i think the greenhouse effect is borelocks, i still think everyone has a responsibility to keep things as clean as possible, its just common sense.

FUBAR · « **Reply #16 on:** September 12, 2006, 08:21:21 pm »

Quoting: F Body

Because it will screw the engine management system because it won't be getting any reading from the O2 sensor and go into limp home mode ?

Incorrect, there's no post-cat O2 sensor on the 3rd gen

F Body · « **Reply #17 on:** September 12, 2006, 08:23:05 pm »

Quoting: FUBAR

Incorrect, there's no post-cat O2 sensor on the 3rd gen

FUBAR · « **Reply #18 on:** September 12, 2006, 08:24:35 pm »

Quoting: philoldsmobile

on the other side of the coin, surely we are all responsible to minimise the pollutants in the air? while i think the greenhouse effect is borelocks, i still think everyone has a responsibility to keep things as clean as possible, its just common sense.

Exactly, seen as my car is never going to be anything except a powerfull (hopefully) road car I can't see why not to maintain this, not that i'm being a tree hugger or anything (god forbid!!) but even though a decent cat is about $100 more than a Cat replacement pipe they last fookin ages so why not.

philoldsmobile · « **Reply #19 on:** September 12, 2006, 08:28:34 pm »

nope, didn't happen untill OBDII

my car has 4 o2 sensors, and two cats..

http://www.3.8mustang.com/articles/exhaustfaq.shtml

CJ-IROCZ · « **Reply #20 on:** September 12, 2006, 08:48:41 pm »

Quoting: F Body

Because it will screw the engine management system because it won't be getting any reading from the O2 sensor and go into limp home mode ?

Why do people think that the manufacturers spent millions of $ delevoping the best all round engine control, i.e emissions, performance & economy and it will be better if you just rip part of it out ?

christ chill out mate, really dont think thats right though , if what you say is true then surely there would never be a reason to uprade anything on stock cars . it was chevrolet that put the hugely restrictive manifolds / y-pipe / catback system on my car after millions of $'s

the cat that i have on my car is knackered and yes a new high flow cat is an option and i might opt for one but one thing for sure is that the old bugger wont be going back up

FUBAR · « **Reply #21 on:** September 12, 2006, 09:31:46 pm »

I'm going to see what the existing borla system sounds / feels like when its installed next week first. before any of this is attempted, if its intrusive using the insert I'm going to use then i'll look into this variable system

EDGE · « **Reply #22 on:** September 12, 2006, 09:52:06 pm »

Quoting: philoldsmobile

nope, didn't happen untill OBDII

my car has 4 o2 sensors, and two cats..

lucky git.... I had 6 cats to take care of....

EDGE

FUBAR · « **Reply #23 on:** September 12, 2006, 10:06:48 pm »

Quoting: EDGE

6 cats

I was looking at my mums Hyundai Coupe yesterday and she was suprised to hear she had 2 ( I wasn't) one of which was bolted straight to the exhaust manifold! the other one of which was over 2 1/2 feet long under the car

55starchief · « **Reply #24 on:** September 12, 2006, 10:12:27 pm »

Subaru impreza's have 3 in the exhaust manifold then 2 more in the main section