S54 Steedspeed/HPF Tubular Manifold Replacement

if we can fit a 71 mm option 3 if not option 2

Lutz....Option 3


However, just wondering. Doesnt someone already have a hpf stage 3 or something and saad/proefi or SP made them a tubular mani? what about the z4 with the tubular ex. mani thats a HPF car....does it make more power or.....?

option 1, as long as the price isn't redic. option 3 if i can fit an exhaust onto it.

Originally Posted by FragNasty

Option #3 seems more optimized.

As it relates to the viability of this option:

• Would the turbine housing be the only part required to be swapped to convert a single-scroll turbo to a twin? Any comments on the availability of this part?
• Are the flanges even compatible so that someone could feed a single scroll turbo with a twin-scroll manifold (for a more incremental upgrade)?

How close to equal length are the tubes?

Are equal length tubes even that important with FI?

Thanks in advance.

To convert a single scroll turbo to TS, yes, you can change only the exhaust manifold. It would be a direct swap. You can also run a single scroll turbo on a twin scroll manifold however without most of the gains of the manifold. As far as fitment, open T4 and divided T4 are the same flange, just without the divide. No fitment issues mixing and matching if you'd like to swap housings later on. Equal length runners are "ideal" however unless the manifold is nearing its maximum flow, very little gains are to be had. I do try to make runners as equal as possible however sometimes you can only take it so far due to fitment and space constraints.

Originally Posted by dragosid

Can/should we fit a divided ex mani on our undivided 6766s?
Is it possible to make the other two tubes and recirculate it?(some can't have their cars too loud)

Yes an undivided turbo would bolt right up to a twin scroll manifold. As I mentioned above, just without a majority of the gains from the manifold. We are not looking to offer a "kit" or get too deep in hardware changes other than the manifold. We would start with offering only open dump setups. I/Lutz do not have a recirculated downpipe in house to fab to, so that would not be an option at the current time.

Originally Posted by Providence

if we can fit a 71 mm option 3 if not option 2

No reason I see that I couldn't fit a 71, 74, or 76 with a TS manifold

Originally Posted by InDiGlOM3

Lutz....Option 3


However, just wondering. Doesnt someone already have a hpf stage 3 or something and saad/proefi or SP made them a tubular mani? what about the z4 with the tubular ex. mani thats a HPF car....does it make more power or.....?

None of the Z4's are running optimally yet, nor were they ever ran with another manifold so hard to make comparisons there

Originally Posted by 6spd_legend

option 1, as long as the price isn't redic. option 3 if i can fit an exhaust onto it.

We haven't decided on pricing yet but let me at least say these won't be budget/price crunch manifolds. They will be what they are, priced as we feel necessary for the part. As I mentioned in my first reply to Bdave, we aren't trying to compete with anyone else offering manifolds or have a price or "who's is better" war with anyone else making hardware for these cars. Simply we are trying to offer yet another option for those that would like to go that route.


Hopefully that answers your guys questions, anything else, please let me know. Thank you to everyone for your interest, comments, and input this far!

-Shawn-

+1 for option 3.

Bump

I'm interrested for option 3 instead of HPF manifold

Thats aweosme work on the manifold!