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View Full Version : Discussion: Pros/Cons of using a V-Band style Vs. Flange style exhaust



Shadowlife25
12-16-2009, 05:49 AM
Discuss! :)

I was pretty sure that Schmleff did a V-Band style mandrel bent exhaust on his ST185.
It looked fantastic.

What are the advantages to this style of exhaust?

What is the difference in fabrication price?

Any information would be great.

MrWOT
12-16-2009, 05:57 AM
If you've EVER tried to remove a 20+yr old exhaust, you have answered your own question :hehe:

No advantages other than ease and simplicity.

Shadowlife25
12-16-2009, 06:01 AM
I read you on that one. ;)

Do they leak less though?
I mean I don't even know if they still use a traditional gasket between the mated sections.
Any ideas on how difficult it is to fabricate this style and whether any exhaust shop is capable of doing it?

MrWOT
12-16-2009, 06:03 AM
All it requires is welding some vband flanges to the end rather than through bolt flanges, no, they don't leak.

Shadowlife25
12-16-2009, 06:11 AM
Sweet. This is sounding better and better.

I wonder what pricing is on the components?

Shadowlife25
12-16-2009, 06:29 AM
http://www.siliconeintakes.com/index.php?cPath=10&osCsid=324deebd7ffccc8a7100e5f636de3401

This is possibly the cheapest I have found for the actual hardware.
Offered in both stainless and mild steel.

I'll post more info as I find it.

donteatbugs
12-16-2009, 07:45 PM
my dp is vband, way more easier that 7 nuts and studs

Carolina91GT-S
12-16-2009, 08:29 PM
This is very similar to what I am doing on my current build. I am using swagelok fittings and what our industry calls KF or ISO style flanges. Essentially it is a Vband type clamp but it uses Orings instead of gaskets. I am doing this for all lines except exhaust and using the Vband for exhaust. Excellent sealing characteristics and easy to disassemble/assemble

lalojamesliz
12-16-2009, 08:31 PM
my dp is vband, way more easier that 7 nuts and studs


do you have any pictures of it you can post?

Carolina91GT-S
12-16-2009, 08:39 PM
This is very similar to what I am doing on my current build. I am using swagelok fittings and what our industry calls KF or ISO style flanges. Essentially it is a Vband type clamp but it uses Orings instead of gaskets. I am doing this for all lines except exhaust and using the Vband for exhaust. Excellent sealing characteristics and easy to disassemble/assemble

joe's gt
12-16-2009, 10:15 PM
do you have any pictures of it you can post?

x2

rizin
12-17-2009, 03:44 AM
I like the idea of using these on the exaust. Might have to look into this since I will need to put a new flex pipe in when I get my engine done.

presure2
12-19-2009, 05:18 PM
i LOVE vbands, as long as the clamps are of good quality.
i prefer the vibrant style clamps, which are super easy to remove and install once the flanges are welded.
like this:
http://d5otzd52uv6zz.cloudfront.net/03c71a6f-6b2c-4abf-b977-a76555bebbe7-350.jpg
VS the normal style vband like this:
http://ecx.images-amazon.com/images/I/31v0DVdwddL._SL500_AA280_.jpg

pros:
super easy install and removal
perfect alignment of pipes (with the vibrant style that have a male and female flange, anyway)
look great
no gaskets needed..ect
the only con i can think of is whoever welds up the exhaust has to make sure the pipes line up very well before welding the flanges on, there isnt nearly as much play with the flanges like there are with a normal 3 or 2 bolt flange.

T-spoon
12-19-2009, 06:14 PM
I think my DP vband on the supra actually does leak a tiny bit.. BUT, even if it does, and even if it leaked a lot, it would still have been worth it for the dozen or so 20 second drops of the DP.

Blackcloud
12-19-2009, 06:23 PM
speaking of exhaust.. i want to upgrade to 5" turbo back. they say it will sound a bit deeper. right now my 4" sounds like a jet engine, and then my tires peeling out at wot

MrWOT
12-20-2009, 05:05 AM
I think my DP vband on the supra actually does leak a tiny bit.. BUT, even if it does, and even if it leaked a lot, it would still have been worth it for the dozen or so 20 second drops of the DP.

If it does you can sand it true, must be warped

T-spoon
12-20-2009, 06:06 AM
If it does you can sand it true, must be warped

Sadly the very least of my problems with it right now, but thanks for the info :)

Sang
12-20-2009, 06:12 AM
Pros: Vband's are just better and makes life easy.

Cons: There really aren't any. They are marginally more expensive to use vbands instead of flanges. And if you use a support bracket, you can't attach it at the flange with a vband.

Also, if you're looking for lots of power and needing lots of flow...I've yet to see a good 4" flange for exhausts. Once you go bigger than 3.5", you'll be looking at vbands for your connections, unless you want to put the time into cutting your own 4"+ flange which I don't see it being anymore, or less, cost effective.

And if you really want to go vband all the way, Tial makes a few v-band turbine housings (both inlet and outlet) for some of their gtxxxx turbos. Obviously needing a new manifold...but they are pretty slick.

Sang
12-20-2009, 06:17 AM
Here is one on a 3sge. Put together by an employee at Engaged Momentum.

http://i8.photobucket.com/albums/a46/shocker2/photo-5.jpg

Shadowlife25
12-20-2009, 07:41 AM
Pressure2 and Sang:

Thanks for the pictures and the great info! :)

I had no idea that V-band fittings were offered in a male/female type, so that is good to know.

I also have never seen a turbine back V-band setup. It looks REALLY slick. :bigthumbu

joe's gt
12-20-2009, 08:16 AM
thanks for the pics guys. really is worth 1000 words.