Is there any major disadvantages to running a hot side like pictured vs 2 pipes merging at the turbo flange? Not my picture.

 

Major disadvantage, no. I forgot who it was (maybe monkey fab or street karr fab), someone who makes the fancy turbo flanges did a test and it was like 30whp difference at over 1000whp so nothing major, but the divided to the flange setup did make a bit more power.

 

I was thinking since both sides feed into the same size pipe then move a foot over to the flange would just extend the back pressure point to the Y and slow the exhaust going into the turbo perhaps causing slower spooling and a reduction in power.
Now after pulling that out of my *** what would that translate into actual tangible losses, slow sedan answered that question lol.

 

Look at "other" applications' implementation of cross-overs / up pipes (Subaru, for example). It doesn't seem to concern them a bit- some making well over 5hp/ci.

If packaging constraints dictated that setup, it wouldn't stop me from using it (and have).

 

jo

Yeah, the merge would definitely be moved over.

 

That WG positioning looks awesome and would lend itself super well to integration into the downpipe. If I had the room in the front of my engine bay that setup would be high up on my list of things to consider. You could even put a 90* on the end of that v-band to put the T4 housing pointed up if you needed to.

 

LOLZ! I think you could mitigate some of what you speak of by using larger diameter pipe after the merge. However, the example above "appears" to be dual 3" feeding a 3" pipe into a T4 flange so hard to say on a T4 setup if it would even matter at that point.

Most any setup will make pretty good power so for most people I don't think it matters at all, just make it fit whatever chassis you are working on and send it.

 

looks like a bitch to get to the plugs.

 

I've used those up and forward headers on two of my cars and plugs are easy. Granted if your chassis has a small engine bay or high strut towers or something I could see it being an issue.

 

What is the diameter pipe after the merge? Looks small.

 

Mine would be dual 2.25 to 3" with a T6 flange.

 

I think you'd be better off running a divided hotside to really take advantage of the twin scroll T6 housing.
Keep the primaries small in the 2" to 2 1/4" range and you shouldn't need much real estate.
I ran a merged T4 on my last setup and it was noticeably slower building boost with a smaller turbo than my current T6 setup.

 

Mine just cuz:

 

Just like this. ^^^

 

^^^
I was advised just recently the opposite.

 

Based on feedback from ForcedFed, I ran 2.25" from my manifolds all the way to the T6 flange. I haven't had a chance to do the final tuning on it as it all came together later in the season in 2021. The 5.3, T6 flanged VSRacing S480 still builds 3psi on the brake at 3K of the 2 step. Just testing some 45mph on up pulls, it feels fantastic. That setup you have pictured looks clean and efficient. I'd definitely run it if it fit my chassis. I welded all mine up from scratch and even with the radiator up and forward it's mighty tight from the nose of the water pump to the turbo to the radiator. Doesn't run close to hot , thanks to the turbo blanket. O.P. what T6 turbo will you be running?

 

The opposite of a T6 divided hotside so a merged T6?

 

Yes. Not feeding the divided housing with divided feed on a T6. Now I don't know if that was on just a full race type set up vs a street/strip but specifically a v8.

 

If nothing else it just makes sense to me that you'd jump up about 1/2 inch at the "Y" for that last couple feet to the turbo.. Since your kinda going 2 in to 1 ..



To really exployt the split inlet turbos a 180 header split to each port would probably be optimum theoretically.. But dang I would want to build it.. LOL