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-   -   Manifolds and Manifold Design? (https://forums.tbforums.com/showthread.php?t=333452)

EivlEvo 06-12-2017 11:17 AM

Manifolds and Manifold Design?
 
So... using what little logic I possess, I've traced the whistling, and "louder valves" to actually be an exhaust leak on my car.

This is most likely a cracked manifold because obviously.

My question is...

If I were to make my own manifold, what setup works best on the 240 B230F+t?

I know the crappy ebay one moves the turbo further forward (why?), but I don't know that I've seen anything else.

Thoughts?

greasegram 06-12-2017 11:21 AM

Why not repair the existing manifold?

JohnMc 06-12-2017 11:26 AM

Moving the turbo further forward gives you more room for a larger turbo, if you are so inclined. There's space in the front corner of the engine bay, but there's not much you can do about the shock tower in the stock (or close to) position.

EivlEvo 06-12-2017 11:50 AM

Quote:

Originally Posted by greasegram (Post 5625100)
Why not repair the existing manifold?

If I have to yank it off of there anyhow, I may as well get into other turbos and such. I have a spare 16G lying around that could probably use a new CHRA. Might be nice to set this up with an external gate and try and blow my motor.

Otherwise disco potato or maybe cheap holset.

Anybody know what size turbos reliably fit on stock manifolds? Don't the holsets just bolt up?

Benjam83 06-12-2017 01:22 PM

Ah yes, the old "While I'm at it...." thought process.

I like it...

linuxman51 06-12-2017 01:25 PM

the 3076R in the blue car I'm working on does quite well..

EivlEvo 06-12-2017 02:00 PM

Where you put it though? Forward? Or stock position? Which manifold?

Also... I mean, broken studs are a thing man... I'm not trying to be taking this all off a million times. I'll die!

centason 06-12-2017 02:18 PM

J-pipe is the easiest with a NA manifold. Has to be braced. There was a good example of one done correctly, I just can't find the pic/thread.

EivlEvo 06-12-2017 02:23 PM

Car is already a +t.

I wouldn't go J pipe.

centason 06-12-2017 02:25 PM

Quote:

Originally Posted by EivlEvo (Post 5625218)
Car is already a +t.

I wouldn't go J pipe.

I'm just saying if you were to build your own, that's the easiest way. +t is +t... you're asking about manifolds.

http://forums.turbobricks.com/showth...er4life&page=5

linuxman51 06-12-2017 02:48 PM

Quote:

Originally Posted by EivlEvo (Post 5625204)
Where you put it though? Forward? Or stock position? Which manifold?

Also... I mean, broken studs are a thing man... I'm not trying to be taking this all off a million times. I'll die!

it's on a stock manifold. snug, but not impossible. I don't break too many studs, and at any rate, they're cheap to replace. normally the studs come out of the head if they've been in a while.

http://www.pbase.com/kdh51/image/164747834/large.jpg

Tfrasca 06-12-2017 03:07 PM

How does that not hit the strut tower when the engine rocks?

linuxman51 06-12-2017 04:15 PM

good mounts. it's not quite as close as it looks, but it's snug.

Marvelous3 06-12-2017 04:41 PM

That thing has gobs of space.

mopar318 06-12-2017 05:00 PM

There isn't a whole lot of space due to the strut tower so you have to move the turbo up closer to the radiator.

http://i32.photobucket.com/albums/d4...psbbachxnx.jpg

There is my example. There will be more room with a 8 valve

EivlEvo 06-21-2017 02:00 PM

This all good info... thanks crew.

EivlEvo 07-13-2017 12:16 PM

I have updated questions as I begin the journey to Holset land.

The general consensus is to grind the flange off of the stock B230FT turbo manifold, and mount holset there.

Is this considered better than log manifold or j pipe? I have both NA and turbo manifolds available to yutz with, and Holset 351 has a wastegate port welded to hotside so I believe I should be good to go in that sense...

TLAO was just implying in another thread that the J pipe proved to be quite limiting compared to his custom equal length setup. This would seem obvious to me, but I wonder how it compares to just a stock turbo manifold? Just trying to weigh out my strategy and options moving forward here.

gross polluter 07-13-2017 03:04 PM

I'm confused how it's limiting when the car in question was performing the same with less boost.

EivlEvo 07-13-2017 04:01 PM

Quote:

Originally Posted by gross polluter (Post 5639987)
I'm confused how it's limiting when the car in question was performing the same with less boost.

Maybe I missed that part. I read that that car seemed to hit a wall at about 18psi (don't quote me on this). Whereas he was able to bring his up to much more boost.

I'm asking more than stating. My suggesting that was merely my interpreting it. But I'm genuinely asking what people think is better now.

Does anyone have any flow numbers (I can't imagine) on the turbo manifold vs an NA manifold? Anything with up/J pipes?

thelostartof 07-13-2017 04:22 PM

It didn't hit a wall, that is just the boost he was running.

J pipe will perform way better than a 90+ in my mind.

EivlEvo 07-13-2017 04:55 PM

Quote:

Originally Posted by thelostartof (Post 5640050)
It didn't hit a wall, that is just the boost he was running.

J pipe will perform way better than a 90+ in my mind.

J pipe on an NA manifold? Interesting... what do you suppose causes that?

VB242 07-13-2017 05:14 PM

Because twin scroll?

gross polluter 07-13-2017 05:55 PM

Quote:

Originally Posted by thelostartof (Post 5640050)
J pipe will perform way better than a 90+ in my mind.

This is correct. On both my car and Josh's 242 there was approximately 18-25% difference in VE across the powerband between NA manifold with J pipe and 90+, the NA manifold with J pipe being greater in engine VE.

Still didn't stop us from making 400whp on a 90+ adapted to a 16v head.

cosbySweater 07-13-2017 05:59 PM

If he's not doing any head work I vote 90+ for 99% of tbrick builds

gross polluter 07-13-2017 06:12 PM

Quote:

Originally Posted by cosbySweater (Post 5640108)
If he's not doing any head work I vote 90+ for 99% of tbrick builds

Agreed. Although not as ideal as other options, it won't be the weak link for the 99% of the setups on this forum.


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