Any one twin turbo a 200 yet?

[Anonymous]

Tomorrow I will change this thread or make a new one to include my ideas and plans. HOWEVER tonight I am just curious if anyone has done a twin turbo setup on a 200. Anyone attepted it even? Wondering if anyone had or if I actually will pioneer something.

Thanks

 

[wallaka]

Looks like you will be a pioneer. I've never seen or heard of it being done. You'd have to use extremely small turbos...like those from a Turbo Sprint or something. Those had 1 liter 3-cylinder engines, so it would be the perfect size for good response. I'm not sure of the exact size of those though...it would be about like a T25 maybe. A T3 with a small A/R could also work well.

 

[Asa]

Xecute is workin on a twin turbo manifold
his AOD adapter is takin up a lot of his time though, but he is plannin it

 

[xctasy]

Part of my dogged focus on low mount starter AOD transmissions is to create engine space when using twin turbos. In Stock high mount 144/170/188/200/221 and Aussie 250 blocks, the starter is a big obsticle.

Toyota did the twin turbo thingy first in the Jap market 1985 Totota Crestas andMark II 2000, a DOHC I6. (Your US Market Mark II Cressida never got it) Port phasing is similar to our small I6's, but the engine is much sorter.


You see a lot of the older Supra 2000 or Soarer 2500 cc Twin Turbo unit using twin CT26 turbos on ebay. They are on some Altezzas and some Lexus IS 200's, from memory.

The problem is the kit has a single outlet which creates back pressure on the impellor drive.

But they do exist.

A good set-up is the custom Datsun L22/26/28, which has similar port pahsing to our small I6. Factory or factory GTR Skyline versions are not pahsed right.

Funny thing is, as a moderate set-up, twin turbos are very good in terms of 'bang for the buck'. For killer boosts over 12 psi, they are pretty usless, as most Supra, Skyline and IS owners just opt for a huge T66 turbo, and boost the crap out of a stock six.


Twin turbos are designed primarily to creat boost low in the rev range for Japanese 50 mph motorin, and provide scope for TRD or Nismo to go godzilla-balls when making 1000 hp race cars. There are quite a few around.

 

[Anonymous]

Part of my dogged focus on low mount starter AOD transmissions is to create engine space when using twin turbos. In Stock high mount 144/170/188/200/221 and Aussie 250 blocks, the starter is a big obsticle.

Toyota did the twin turbo thingy first in the Jap market 1985 Totota Crestas andMark II 2000, a DOHC I6. (Your US Market Mark II Cressida never got it) Port phasing is similar to our small I6's, but the engine is much sorter.


You see a lot of the older Supra 2000 or Soarer 2500 cc Twin Turbo unit using twin CT26 turbos on ebay. They are on some Altezzas and some Lexus IS 200's, from memory.

The problem is the kit has a single outlet which creates back pressure on the impellor drive.

But they do exist.

A good set-up is the custom Datsun L22/26/28, which has similar port pahsing to our small I6. Factory or factory GTR Skyline versions are not pahsed right.

Funny thing is, as a moderate set-up, twin turbos are very good in terms of 'bang for the buck'. For killer boosts over 12 psi, they are pretty usless, as most Supra, Skyline and IS owners just opt for a huge T66 turbo, and boost the crap out of a stock six.


Twin turbos are designed primarily to creat boost low in the rev range for Japanese 50 mph motorin, and provide scope for TRD or Nismo to go godzilla-balls when making 1000 hp race cars. There are quite a few around.

I understand all about the skyline and supra setups, I'm also a sport compact guy. I knew about twin turbo's I was thinking specifically for our sixes not just in general.

Later I will make a new post about my plans as I think I have a good idea.

Thanks everyone

 

[69Falcon]

The 3rd generation RX-7 ('93-'95 here in the US) was also equipped with twin turbos, but in a sequential setup. The first would spool up very quick to give boost at low rpms, then through some complicated valving it'd switch over to the second, larger turbo for high end rpms. Granted of course, they had a 9000 rpm redline.

 

[gravelrash]

my mate and i twin turbo`d and fuel injected his 221ci `27 t bucket a couple of years ago. might be some pics somewhere.

 

[wallaka]

The 3rd generation RX-7 ('93-'95 here in the US) was also equipped with twin turbos, but in a sequential setup. The first would spool up very quick to give boost at low rpms, then through some complicated valving it'd switch over to the second, larger turbo for high end rpms. Granted of course, they had a 9000 rpm redline.

They broke all the time too...overly complicated. The technology to make turbos spool well and flow well came just behind the technology to make flap doors, vacuum hoses and sensors emulate it. As I remember they had a huge flat spot in the power delivery at changeover, as well as being the most detonation-intolerant engine ever. Good chassis on those though, probably the best handling (mass produced) production car ever.

Anyhow. Back on topic.

 

[Anonymous]

Well, I must say that I was a little shocked to see a post about the RX-7 here. I have a 63 Merc Comet that is undergoing a makeover. I have always wanted to throw a turbo on it and in my search came across this board. In addition this is my first post

I have a couple comments about the RX-7

1. Engines can be relaible however there are certain things that can be done to make them even more so. A lot of stuff from the factory was chinsy IMO. And too many people don't know a lick about the rotary engine.

2. Yes the twins did have a flat spot. I have been in 3rd gens that kick sideways when the second turbo comes on.

3. Sequential is old technology and was stated before is more of a pain to maintain.

4. Vaccuum tubes off the twins is almost comical. Looks like a bad sci fi movie

When it comes down to it there are a lot of people that are running around in the RX-7's with non-sequential stock turbos or just one large turbo. When I was doing my swap into my 3rd gen motor swap into my 1st gen RX-7 I took one look at those twins and saw a headache waiting to happen. Instead I opted for a turbo the size of me head

Twins are capable of 350rwhp. I have seen some just under 400rwhp. This propels the Rx-7 into high 10sec 1/4 mile passes.

I still have a set of twins that are sitting in may garage and considered throwing them on the little 170 that I have. I want to take a closer look at them and check the wheel sizes first. They would be converted to nonsequential(so essentialy one turbo).

Anyway, just thought that I would add some input.

Z

 

[69Falcon]

4. Vaccuum tubes off the twins is almost comical. Looks like a bad sci fi movie

Rotorheads refer to it as the spider's web, it was the first place you looked if your rotary engine was running poorly. IIRC, there was even a company that replaced that mess with hard lines, albeit for some serious $$

 

[Anonymous]

Twin turbos on a Ford 6 with the integral intake would be a mere novelty.

If you had an engine that could breath I could ~maybe~ see it, but never for one of these engines.

 

[Twinscrew]

Variable vane turbos have made sequential systems obsolete. The variable vanes suffered alot of failures when they first came on to the scene years ago but the bugs have been worked out. The new Porsches have LARGE V V twins that spools just off of idle and have no lag whatsoever. If you mat the gas in a new twin turbo Porsche you had better be holding on to something. The V V's are still a bit pricey comapred to a fixed volute turbo but it won't be long before the Chinese will knock-off the design and make them much more affordable.

 

[red65stang]

Im working on it. Right now im gathering parts and designing it. I will prob. start a thread when i get the time to start putting it together.