Austarion

Okay everyone, now to state a fact you must have a logical argument with supporting evidence :P

This post is about unravelling the biggest 'Mystery in the universe' :D the DASH Engine specifications.

Firstly, I would like to point out the the fact that the 'Cyclone' & 'Siruis' DASH Standard CR is 8.5:1

I have tested mine here, and got 165.....plus Four's and More Automotive have cc'd the Head and come to the same conclusion about the CR. This would make sense as myself and another over in NZ with the Sirius DASH aswell, had VR4 spec'd pistons in the bottom end and because the area in the 12V head is smaller than the DOHC then 8.5:1 seems justified.

Secondly, the Engine's power output........

Varies upon turbo, turbo trim, non-intercooled or intercooled.

The Intercooled DASH versions where un-officialy known as the DASH 2 Engines.

1984: FWD Sirius DASH Engine, non-intercooled running the TC range of turbo's, some confusion to whether it was the TC05 or TC06 but will decide on that as further info comes up...........(149Kw)

Mitsubihi's history states here > http://www.mitsubishi-motors.co.jp/docs ... ame_e1.htm that 'Development of the Sirius-DASH engine, the world's first 3x2 valve engine. It was first fitted to the Starion' and then states here http://www.mitsubishi-motors.com/corpor ... index.html 'G63B DASH engine (200PS)' ie 149Kw and does not state it being 'Intercooled' as it does for the G63B Engine in '1983' so it is highly likely that the 149Kw Engine is Non-intercooled. This also explains the section below here why the Starions were still rated at 200Ps with the Sirius DASH Intercooled Engine.

late 1984: 'Siruis' release 'proto-type' intercooled DASH variant, (DASH 2) Rwd for the Starion, 155Kw, turbo unknown again......

1985: 'Cyclone' also release the non-intercooled DASH, Fwd, turbo unknown (149Kw)

late 1985/1986: 'Cyclone' release the intercooled DASH Engine, Fwd/Rwd, referred to as the DASH 2 Engine, TD05-12 Turbo trim-unknown, (170Kw).

1987: Cyclone release the DOHC Engine, which ceases it's SOHC production.

1987, 1988, 1989 'Sirius' then went into production of the DASH Intercooled version (DASH 2), Fwd/Rwd, 170Kw, TD05-12 Turbo Trim 'G'


It has been speculated that 'Cyclone' was produced in the Mitsubishi plant in Tawain and that the 'Sirius' types were produced in Japan. This is un-verified, but it does state here > http://www.mitsubishi-motors.co.jp/docs ... ame_e1.htm under 1986 'Development of the Cyclone engine series (550cc~3000cc) and the Cyclone V6 engine series (2000cc~3000cc).' which could mean by the Development of the 'Cyclone' series, this could have been done elsewhere, such as in the Tawian plant..........

Now, there are various trims of the TD05-12 turbo, Four's n More Automotive confirmed it and so has another. Apparently there are the following trims, A, B, C, or G, in the factory 'G' trim wheel, the exducer of the comp wheel is bigger and the turbine wheel has a bigger gap between the blades (factory clip).

Can anyone, approve or disprove the above or even add to the specs of the variant DASH Engines ?

I remember user 'sirius dash' said he got himself a 'Sirius DASH 2' and we weren't sure if it existed, but it seems they do.......

I was under the impression that the Cyclone DASH - was the DASH2.

Because it was the second version of the 'Dual Action Super Head' (I think thats what it was, sounds funny) - adding an intercooler would not require a head design change, but implementing Cyclone would.

I have seen pictures of the DASH Cyclone motors, (two or three max) they were in either Galant GSR or Sigma GSR cars. Id take a guess the Cyclone DASH was fitted in 1987 - before the 6th gen Galant, but after the Cyclone development.

Also I have a turbo off a DASH Sigma GSR, and it is the TD05-12 but, it has no trim spec, it just says 'TD05-12'.

Yes the various TD05-12s' never stated there Trim specs on the compressor covers for some reason........

It would make sense that when 'Cyclone' went into development of the DOHC that 'Sirius' then took over the DASH 2 production.......

What do you mean by 'implementing Cyclone' would require a head design change ?

Yes, DASH = Dual Action Super Head

Also the Ralliart (UK) DASH Head was designed to support 250Kw.

I need to look it up again, just to make sure I am not talking BS, but I remember reading that Cyclone was an intake port design, that caused the intake air to spin, creating kind of a cyclone/vacuum effect. To implement this in to a DASH head would require the import ports to change - thereby new head, or DASH2.

Yeah, if you could look it up that would be great.

This could mean that the Cyclone DASH Engines used the earlier trim TD05-12s' and that the Sirius DASH intercooled engines, resorted to the 'G' trim to bring it up to spec (170Kw) from the resultant power loss associated with running the Sirius intake manifold. Or it could mean the Sirius DASH did use the Cyclone designs but then that wouldn't explain for the various trims of the TD05-12s' the importers here are pulling of the DASH engines, which could further justify my first guess above......

hmm didnt really know this. But here are quotes from two websites

vfaq.com wrote: What is a 'Cyclone' intake?
The 'Cyclone' intake is the air intake system from a Mitsubishi Cyclone, a car not marketed in North America. This intake is a dual-runner system that keeps some runners closed unless the engine is boosting. The Cyclone is thought to provide slightly better power than the stock intake, but the difference is not significant to the vast majority of DSM owners.

Some Japanese Mitsubishi engines can come with Cyclone intakes installed. Those on the lookout for one should know that there are also Japanese "Cyclone" intakes that do not have the extra runners and associated butterfly valves. These were installed on non-turbo cars.

This intake is not the same as the third-party intake that was marketed as the Cyclone. That intake was a 'magic product' and had nothing to do with Mitsubishi. Neither is it the same as products under similar names marketed for non-DSMs.

RoadRaceEngineering.com wrote: There is no "Cyclone Motor" The long blocks from Japan are the same year for year as the US motors. They will usually have the Cyclone intake manifolds on them. This is just a dual runner (similar to Toyota's TVIS system) intake manifold that gave a little better bottom end power IF you have all the electronics to properly actuate the butterfly valves. Also there are clearance issues between the Cyclone manifold and the larger US A/C compressor. Yes you can use it, but not really worth the hassle. Some manifolds will say "Cyclone" on them but not have the dual runner butterfly system. The timing belt upper covers sometimes can be slightly damaged from shipping, also the igniter or coil pack may be damaged. This usually happens in the shipping container on the boat ride from Japan.

So filtering through that info, the DASH Cyclone would have more torque down low, but possibly no extra or very little bonus horsepower up high.

Also reading on NZMMCs old posts, that a lot of the EVO VR4's etc did not have cyclone, they were just plain single runners with a ECI Multi label. So was my SOHC Galant. My new DOHC Galant is Cyclone however does not have the extra runners.

Still looking for that diagram that explains the single runner Cyclone :S Ill have a look later

If you can find the diagram explaining the single runner Cyclone manifold that would be great.

What you did quote was from the DOHC Intake manifolds, but the Cyclone SOHC may have a different reason or just better designed intake manifold/head as these do not come with the butterfly systems......

I got this answer when asking on NZMMC a few moments ago:

Cyclone badging started out being the Mitsubishi equivalent of Toyota's TViS, with dual intake runners and a butterfly in every second one. Then, they sussed out that using a runner and port size that was slightly larger than a single cyclone runner worked best all round - This meant cheaper build costs and less failures, but they retained the Cyclone badge, just for the sake of it.

So a double-runner Cyclone, was equivilent to TVIS
A single-runner Cyclone is just a normal intake, but with what Mitsubishi felt was the perfect size runners. A cyclone badge on other cars, would be just Mitsi rice - such as my old 1800cc carbie Galant and its 'CYCLONE' sticker.

if you want to know the original specs they are posted on cordiaturbo.com
tnere is a table and a short write up on the dash spec engines