My personal divided T3 manifold "build thread"...

[*Boostwerks*]

Bingo.

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[Justin Olson]

My major concern would be the turbo selection. That turbine housing is going to be questionable for flow on the gt3082r. I would have run a GT3076r personally as the largest turbo with that divided .78 a/r.

Justin

[*Boostwerks*]

Originally Posted by Justin Olson

My major concern would be the turbo selection. That turbine housing is going to be questionable for flow on the gt3082r. I would have run a GT3076r personally as the largest turbo with that divided .78 a/r.

Justin

Same here honestly. The reason I chose the 3082 was because my buddy was selling his (slightly used) for $800. It was simply an offer I couldn't refuse.

There was someone on here that made very good power with one on slightly less boost than what other 76's to make the same power. The spool up seemed almost exactly the same, and torque didn't fall off like other 76 graphs I've seen. This was a built 1.8l gsr. The way I figure, is that the .78 housing should flow almost as much as the .82ar, yet be more efficent at the same time due to the cylinder division. This is all my "theory" of course, but from what I have seen out there, the logic fits. After all, I'm not looking for 600whp from this setup. I just want a nice 300whp powerband on low boost to be safe on my 11:1 CR stock block B16. My old SC61 was just too damn laggy.

And like I said, if I can find anyone who makes a large A/R housing, I will by all means get it. The .78ar is just the only ratio ATP offers.

[Vince64]

that full race mani is done right. Its divided all the way to the v band.

[DESTROYER]

was there a point to that statement or are you just swingin nuts?

[.RTErnie]

Originally Posted by DESTROYER

was there a point to that statement or are you just swingin nuts?

he's just swingin' away. Bryson's collector looks to be better finished than the F-R one.

[ebydrc]

Originally Posted by .RTErnie

he's just swingin' away. Bryson's collector looks to be better finished than the F-R one.

i think he was just useing the pubic hair for floss

[*Boostwerks*]

Originally Posted by Vince64

that full race mani is done right. Its divided all the way to the v band.

Pics? Even if it is, it would make almost no difference. Once the WG Opens there is still a point where the the cylinder flow can cross (although it's likely not to be much of anything). The only way to truely eliminate it, is to have dual WG's. To say what benefit that would have over a single WG is anyone's guess. If someone would want to test that...be my guest.

[ls1_datsun]

I'll be testing a gt3076r in the next month here with the following housings:

standard t31 .63ar garrett housing
ATP divided .78ar housing
Tial .63 Stainless V-band housing.

It will be tested with variations of the manifold.

For the standard t31 housing and Tial v-band housing
Single gate 60mm

For the ATP twin Scroll Housing:
twin scroll merged to 60mm gate
twin 44mm wastegates

[Vince64]

no nut swinging. I just wanted to say that why go though the trouble of making a divided manifold when the WG collector will allow gas transfer between the two different banks. Isnt the point of a divided manifold to separate the pulses?



this is a suby up-pipe but you can see it divided all the way to the flange. It just seems like the right way to use a single WG on a divided manifold.

And yeah dual WG's would be the best bet but add on another $300 and then make the space to put it and another dump tube.

[*Boostwerks*]

Originally Posted by ls1_datsun

I'll be testing a gt3076r in the next month here with the following housings:

standard t31 .63ar garrett housing
ATP divided .78ar housing
Tial .63 Stainless V-band housing.

It will be tested with variations of the manifold.

For the standard t31 housing and Tial v-band housing
Single gate 60mm

For the ATP twin Scroll Housing:
twin scroll merged to 60mm gate
twin 44mm wastegates

Dang...I was just being sarcastic lol. I didn't think someone would actually go through all that trouble to test something like that. But I can't wait to see the results of that! Keep me updated if you can!

Originally Posted by Vince64

no nut swinging. I just wanted to say that why go though the trouble of making a divided manifold when the WG collector will allow gas transfer between the two different banks. Isnt the point of a divided manifold to separate the pulses?

I understand what your saying man. I just don't think it would make much of a difference is all. I might be completely wrong though, and ls1's tests should definetly reveal any differences.

However, I would like to make it clear though that I will be trying to keep the WG tubes completely divided (just like the full-race setup). Like you said... why go through all the work to divid the collector, and not put a divider in the WG tube? It certainly can't hurt anything, and wouldn't take much work to do.

[tony1]

Originally Posted by .RTErnie

he's just swingin' away. Bryson's collector looks to be better finished than the F-R one.

Speaking of which, looks to me like it's probably pretty thin in areas based on the before and after pics. Look at how much it hangs into the path of flow in the first pic, once that's ground down it's gotta be pretty thin in that area, no?

I'm pretty sure that's why FR doesn't port them out like that, to keep the strength. Good fitup and no grinding > bad fitup but smooth after grinding.

[*Boostwerks*]

Originally Posted by tony1

Speaking of which, looks to me like it's probably pretty thin in areas based on the before and after pics. Look at how much it hangs into the path of flow in the first pic, once that's ground down it's gotta be pretty thin in that area, no?

I'm pretty sure that's why FR doesn't port them out like that, to keep the strength. Good fitup and no grinding > bad fitup but smooth after grinding.

The fitup is actually A LOT better than what that pic makes it seem. The corners I just put a lot of filler in there so i could blend the roundness of the pipe to the squareness of the flange (hence the blob in the pic). I had a straight on pic of the collector before It was ported, but unfortunetly my GF deleted it so the card would have room to take a pic of our cat.

It isn't very thin at all though. Theres a little less than an 1/8" of pipe between the ported pipe, and the outside of the pipe. Considering 1/8" is the size of the pipe, not much was ground out at all.

[_k20a2_]

Correct me if I'm wrong but when in boost the wastegate's sole purpose is to vent exhaust gasses. They're not mixing and going back to the turbine. As long as the tubes are divided all the way to the wastgates valve you should have no problems. Otherwise gasses would mix when the wg is closed.

[mchuang]

Looks pretty nice, cant wait to see it perform. Let me ask you what turbo are you using that has a divided t3 flange, because I have yet to see one. A link would be nice also.

[weiRtech]

i've seen some holset t3 divided flange turbos. perhaps that is what bryson is using? they are honking big.

[ls1_datsun]

atp has a t3 turbine option in divided .78ar. Borg warner also offers divided t3's in more ar options.

[drumking15]

Originally Posted by weiRtech

i've seen some holset t3 divided flange turbos. perhaps that is what bryson is using? they are honking big.

ya they are massive...not quite quite a gt42...but w/ the offset of the turbine housing it makes fitment a lil tricky


and this divided setup would be perfect for my old holset...never did get to run it in a divided setup...but it worked well w/ an eq. pressure manifold

[*Boostwerks*]

Originally Posted by _k20a2_

Correct me if I'm wrong but when in boost the wastegate's sole purpose is to vent exhaust gasses. They're not mixing and going back to the turbine. As long as the tubes are divided all the way to the wastgates valve you should have no problems. Otherwise gasses would mix when the wg is closed.

Isn't that what I said? I said they would mix, but honestly it wouldn't be much of anything...hence why i think it wouldn't make much difference. At any rate, I'm going to divide it all the way to the flange.

Originally Posted by mchuang

Looks pretty nice, cant wait to see it perform. Let me ask you what turbo are you using that has a divided t3 flange, because I have yet to see one. A link would be nice also.

Theres actually a lot out there. But I'll be using a GT3082R with the .78ar ATP housing. The GT37 actually comes with a divided T3 as well. IMO, It's all about the divided setups. I'd really like to get a larger A/R housing for the turbo to really take advantage of the divided benefits, but unfortunetly there isn't one out there.

Originally Posted by drumking15

ya they are massive...not quite quite a gt42...but w/ the offset of the turbine housing it makes fitment a lil tricky


and this divided setup would be perfect for my old holset...never did get to run it in a divided setup...but it worked well w/ an eq. pressure manifold

For sure man. Once I get everything worked out, I'll be able to add these manifolds to my collection.

[drumking15]

Originally Posted by Boostwerks.com

For sure man. Once I get everything worked out, I'll be able to add these manifolds to my collection.

thats awesome news for the holset guys back when i had my nuekin mani i created some rough designs of a divided setup that i wanted to build...but blew it up...and then got out of the game till im out of school

[*Boostwerks*]

I hear ya man. It's taken me so long to get my car finished because I've been trying to finish up my degree as well.

I'll have more time this weekend to get some runners built...WOOT!

[Autoworks]

coming along nicely
Is this going to be a chassis specific mani as well?

[RC000E]

Is it done yet....is it done yet?????? HURRY UP!

[servion]

Looks good man! I wish you could get yourself a bigger hotside a/r.

[QuarterMileMaster]

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