We are developing the Ultimate FD3S T4 EWG( external wastegate) Turbo Manifold. This Investment cast 347SS tapered T4 Twinscroll FD3S turbo manifold will soon supersedes our proven welded version. Our welded version is proven to over 700rwhp, and hold boost pressure as low as 6 psi on road course raced Rx7s.

How is the new cast version different from our welded version?

347SS vs 304SS
Tapered Main Runner Inside Diameter
1/8 NPT EGT or EMBP bungs standard, not optional
Every Flange is CNC Machined
Larger Inside Diameter Entrance Bore
Smoother transitions


Cast 347SS
This manifold is cast from 347SS which is far superior to 304SS. Not only does 347SS last longer at elevated temperatures , there are no welds like those found in traditional turbo manifolds. When a welded turbo manifold fails, they almost always break at or next to the welds. A broken turbo manifold even if it features a life-time warranty can be a serious hassle to remove and send back in for repair, especially if you miss a race because of it.

Tapered Main Runner Inside Diameter
This manifold's inside diameter slowly tapers down as it reaches the T4 flange. This process is only possible with a cast manifold. A traditional welded manifold does not change inside diameter. This tapering process is identical to the volute of a turbine housing. By tapering down it increasing velocity, and speeds up the exhaust flow and increases boost response.

CNC machined flanges
All flanges are CNC machined to be perfectly flat. Most turbo manifolds are just belt sanded flat, which is not as accurate as CNC machining. The wastegate flanges typically leak slightly on a welded manifold, even if the face is belt sanded flat. The outside vband flange, and inner wastegate seat dimensions do not stay true because of the welding process.

Smoother transitions
Welded turbo manifolds require hours of hand porting with a die grinder, and sanding drums to contour the change in shape from a round tube to a square T4 flange. We have taken this step, just like the rest of the manifold, to an even higher level of quality. The investment casting process makes every transition seamless. Welded manifolds are made from short pieces of cast elbows. Every time there is a joint it is welded, there can be a slight disruption on the inside diameter if the pipe is not perfectly matched, or the weld penetrates all the way through. This disruption is eliminated with the casting process resulting in a better flowing turbo manifold.


Design and Fitment

This manifold has Proper Waste-Gate Placement for Proper Boost Control. Does your current turbo manifold overboost from poor wastegate placement? If so this unit is guaranteed to never boost creep! The entrances to the waste-gate runners are in the direct flow, and tear-dropped. The waste-gate runners are very short to disrupt the flow as little as possible. These manifolds are flanged for twin TurboSmart Comp40 waste-gates. Tial MVS units will also work.

This manifold fits both LHD, RHD, Stock LIM, Xcessive LIM, and most Vmount Inter-Cooler Systems. It will accommodate any size down-pipe up to 4". It also clears the Pineapple Racing Idler Pulley( Except for GT42, or S472/475- we recommend our EWP kit here) Air Pump, Air Pump Bracket, and EGR require removal. Heat Core Hardline Requires relocation or replacement with flexible line. Fits most popular turbo sizes like Garrett GT35R, GT40R, GT42R(T4) Precision 6262,6265,6266,6765,6766,7175( H cover only for 7175), Borg Warner( standard airwerks and SXE) S360, S362, S366, S472, S475, EFR EWG 7670, 8374 and 9180.

We will be starting a group buy soon with more details, and we hope to have the pricing come in FAR below 95% of manifolds on the market! If you are in the market for a T4 turbo manifold for your FD3S Rx7, look no further!

 

when can i pre-order?

 

http://www.turbosource.com/mobile/Product.aspx?ProductCode=TB-T4CastFDTwinscroll

 

The ball is rolling!

http://www.turbosource.com/product-p...twinscroll.htm

 

I knew this day would come

Same plan in the near future for FC?

 

We have no plans for the FC( our cast IWG EFR fits the FC FYI).

Next up is our ND miata.

 

thanks!

 

We have now sold 80 of these units, 24 left in stock;

https://turbosource.com/collections/...turbo-manifold

We have also decided to move forward and cast the FC version, its going to be a few months until its out however. Similar specs as the FD.

 

7 left in stock. Next 100 will be a couple months out( already ordered and paid for ).

 

100 back in stock late next week.

 

Does anyone have a stock port 8376 dyno to higher rpms? 8k? 8500? 9000?

 

Most aren't revving a stock port engine that high, regardless of turbo size they simply don't make power past 8k RPMS. The torque curve always nose dives past 6k rpms, then drops pretty well hard past 6500.

 

Another batch wrapping up, 100 more on the shelf by the end of the month...