SpiderN9NE

iTrader: (8)

Ok i getting alittle pissed about ordering the wrong parts. Ok i got a 3inch downpipe for my Na-T setup and the inner diameter is 3inch so i emailed them to see what size Vband to get and they said 3inch. i order a 3 inch VBand and its to small are you supposed to go by the outer diameter when ordering the vband? And im assuming that downpipes go by the inner when listing its vband size since the seller said 3 inch VBand.

Another thing im about to buy a turbo And ive been looking at 3 inch Vband ones. are they refferring to the inner diameter or the outer.

The downpipe measured 3inch inner and right about 3 3/4 outer diameter. what size turbo vband should i be looking for? im thinking the turbo listings are referring to inner diameter as well. but im not sure and need some help before i order more wrong ****.

1sxyrxy

the clamp its self is to small or the ring doesnt match up with the turbo?

Cleanshots

iTrader: (2)

get 3.5 inch v band.

SpiderN9NE

iTrader: (8)

The 3inch VBand that i purchased wont go around the downpipe that i have. The downpipe has a 3inch inner diameter and the outer diameter is right around 3 3/4 inch. The reason why i got the 3inch vband is because the people i got the downpipe from said thats what i need.

obviously i need a different one, but what size? and when people list there turbos with a 3 inch vband is that the inner or outer diameter they are referring to. i guessing inner and thats what i would need to get to match the inner diameter of my downpipe. i havent purchased the turbo yet and didnt wanna purchase one with wrong vband size.

Thanks for replying also.

SpiderN9NE

iTrader: (8)

what should i be looking for with buying the turbo? when they list the turbo as having a 3 inch vband outlet are they referring to inner diameter (matching inner diameter of downpipe) and the lip would accommodate the 3.5 inch vband as you stated to get?

EDITED: clearing up question.

Cleanshots

iTrader: (2)

from the measurement you stated, it seems that the 3.5"v-band would do the trick.

SpiderN9NE

iTrader: (8)

Sorry to drag this out but i dont wanna end up with the wrong turbo and have to cut and reweld my downpipe. because i messed up again.

So when buying a tubo i need one that says 3 inch V Band, because they are referring to the inner diameter. and the extra lip would be like what i have on my downpipe, 3inch inner and 3 3/4 with the lip making the 3.5 fit over both?

mktbully

iTrader: (7)

3.75 is a weird size for OD.

exhaust pipes are measured on the OD.
soooo say you have a 3" exhaust pipe...that's 3" OD.
if you need to buy a V-band flange/kit then the flanges will have a 3" ID so you can fit your 3" pipe on to it.

are you 100% sure you're at 3.75 on the OD?

SpiderN9NE

iTrader: (8)

uploading pics now

SpiderN9NE

iTrader: (8)

Inner pic



Outer pic

mktbully

iTrader: (7)

pls take a side shot.

that's a 3" pipe.
so "technically" a 3" v-band clamp should work there.
where did you get that v-band flange from?

have you looked at ATP turbo for the clamp?

SpiderN9NE

iTrader: (8)

The flange came on the downpipe complete and welded. instead of ordering another and taking a chance i went out to a couple of places and NAPA ended up having one.

the one that didnt fit was a OBX 3inch-3.31 V Band.

The one from napa is 3.5 - 3.88 i think they said. i tighten it down with just the one side since i dont have my turbo yet. and its pretty tight so i know with the other side it should be fine. I HOPE. LOL

Heres the OBX


Here is the one from NAPA


Here is a full side as requested.

Cleanshots

iTrader: (2)

yea the napa one is right its 3.5 its right use it and your done.. and YOUR WELCOME lol told you its 3.5" :P same DP as me too.

SpiderN9NE

iTrader: (8)

Hell yeah. i never doubted you dude. i just finished responding to the other guys post. And also was tryin to figure what turbo i should be looking for, as far as Vband advertising. if they say 3 inch vband are they referring to the inner diameter like they did with my downpipe? or do i need a turbo with 3.5 vband? This is why the thread is still going. someone let me know.

Thanks Cleanshots

Cleanshots

iTrader: (2)

v-band sizing is based on the outside diameter of the v-band flange. in your case its 3.75 but a 3.5 clamp works on it. different flanges have different thicknesses. so measure its diameter, or measure its circumference and take that number and divide it by 3.14. usually they provide both OD and ID so there is no mistakes. id suggest taking the inside and outside diameters average and getting a clamp that fits that size. usually when your buying them tho they come as a set so the measurement provided is the piping size. because whatever your buying comes all together. 2 flanges and a clamp as a pack. its confusing but that's the way it is.

LONG STORY SHORT FLANGES ARE BY ID CLAMPS ARE BY OD OF THE FLANGE.

i think i may do my whole exhaust with v-bands now that there is soo much talk about this..

ninja edit for my fantastic reading skills... um you need a 3" exhaust turbo. cause then the v-band flange will be the 3.5 if you get 3.5" turbo exhaust the v-band flange will be 4"