I wanted to post about the BAE turbo kits, many of the existing posts have dead pictures and I though they needed to be re-documented. Draw-through turbo kits are not in style right now so these kits can be had for relatively cheap and seem to be not super rare. When I bought this kit this was one of two within a 200 mile radius of me and was 400$. My logic was that that seemed worth it for the cast turbo exhaust manifold alone, even if the turbo was bad. This kit wasn't quite what I expected, So I made this post, with a few pictures, to document it, so anyone else looking at these will have a better idea of what they are getting into. There were some weird design choices that I wanted to point out. I also want to note, I have yet to see two of these kits that are identical part for part, so if you see another one of these posted, probably will be a little different. That said the worst part, the adapter that goes on top of the intake manifold, seems to be the most universal between kits.

Kit is kinda rough but turbo is in good condition, even though I'd prefer a more modern and efficient one. With a good turbo I was quite inclined to install in as is.
But after looking at it for a bit I've decided that I'm not going to use it.

In this setup, the carb sits on a spacer/adapter that reroutes the fuel-air mixture sideways into the turbo instead of letting it fall straight into the intake like a normal carb setup. The turbo then compresses that air-fuel mix (with fuel in it already) sends it up to a pipe into that same car spacer/adapter that has a separate section that reroutes it into the intake runners. This adapter is poorly designed for flow.

The Good:
Exhaust manifold - thick metal, smooth ports, probably the best part of the kit
Fit- all the parts would definitely come together to make a complete turbo kit
Turbo- For its age (these kits apparently came out in 1979) remarkably good condition with very little play, must be pretty sturdy if its fine and the rest of the kit looks like it does.
Power - these kits can almost make 200hp on a stock port, not bad, shm21284 says the turbo should be good for 400hp and claims 190 hp to the wheels.I'm inclined to believe him, and I think I know why he's not close to maxing out the turbo, the rest of the kit is not designed to flow.

The Bad:
What the heck is this intake manifold adapter. The carb side looks fine, for a nikki, four holes, one for each barrel. The secondary on the other hand, blocks the Primary/Center iron ports on the intake, That's gotta be loosing a good chunk of power. They also included a Nikki to square bore carb adapter, It is not port matched at all, If they hadn't made the adapter below it have a four leaf clover shape, I think it would've flowed better.



I would not be able to put this on my car without wanting to take it off and redo this adapter.

Onto the rest of the kit:




The charge pipe on the high pressure side has these fins, they are on the side of the pipe away from the turbo. This pipe has a weird weld in the middle creating an abrupt bend, not as bad as the intake but again, cant help flow.


The pipe leading from the carb is cast in two pieces welded together along the length of pipe, seems like an OK piece.




ROTO-MASTER, INC RAJAY turbo
Model:3AA1EE6081
Serial:207810
Part No. : 600586-23

Stu Stu Stu Stu Boi



Turbonetics Wastegate - Deltagate Mark II - can also be seen in background of next picture



Exhaust manifold seems well made.

Many of these kits, every one I Have seen posted has slightly different parts but I wanted to document one of them decently completely because many of the posts talking about these are missing pictures or the pictures are dead. If only the intake adapter wouldn't bug me to the point I would have to replace it anyway.

 

i had a kit pass through a couple years ago, and i'm delighted to see its not the same one you have!

its like an Ouroboros, super weird.




the thing the carb goesinta is split level, so one pipe goes from the carb and the other goes to the engine

 

good way to demonstrate how it all goes together, with the intake manifold bolting onto the bottom of the carb adapter it just goes on to the engine in one unit, very compact very simple. Definitely sweet little kits, I just wish mine didn't block the primaries on the intake side like a lot of them do. bugs me to the point I'm gonna remake the carb adapter properly before putting the kit to use. basically puts the whole turbo project on hold.

 

I'd stay away from using a newer turbo in a draw through. New turbos are not designed to be drawn through for a couple of reasons; mostly due to sealing issues.


Neat kit regardless. That is an interesting recirculation thing going on there.

One cool thing about doing this draw through setup is you can position your carb in any direction. Another words you won't have the fuel slosh effect that so many of the square bore carbs suffer from on a blow through or N/A rotary.

 

On youtube there's a 10a with a DCOE/draw through setup that I think would be pretty cool. I always wondered who made the kit, or if it was custom.



Edit: Definitely looks homemade.

 

In the US a lot of folks did/do homemade blow through and draw through turbo setups. The draw through is easier to get setup but cooling is harder to deal with. The big plus is the carb doesn't have to be modded to handle the boost, its all after the fuel mix has been done. @bad 83 Used to do stuff like this when he had a rotary. Not sure he is still on this forum anymore but he is what I would call an expert at this type of setup.

 

Draw through was very common, it eliminates having to box the carb or pressure reference the fuel regulator.

That setup didn't block anything on the intake, there are channels between the primary and secondary. Yes there'd be some turbulence, but turbulent flow isn't always a bad thing for a draw through setup. Some kits actually used a perforated plate to promote turbulence!

i was expecting to see the other type, where the turbo blew straight into a new manifold where the inlet pointed right at the primaries and the secondaries just sort of got a log to them. Somehow I had thought that was BAE, now I wonder who made that.

 

That exhaust routing is highly compromised -- tight angle out of the turbine, insufficient clearance / no shielding to the plenum.