Twin turbo? [Merged 11-6]

[mitsuboy]

Dont know of an eclipse. But i know of a VR4 that has a TT engine. Why would it be pointless. They used to think that computers in cars were pointles too.

 

[98TsiAWD]

Originally posted by dsm_racing`
I got a question I always hear people talk about a twin tubo eclipse(4cyl). Are people just stupid or can you actually do that? I know on a V6 and a V8 you can do that. But how the hell are you gonna pull that off on a inline motor? Wouldn't it be pointless anyways? Just a thought

Well, all you would really have to do it get a custom exhaust manifold made that puts 2 pipes to one turbo and 2 pipes to another, then after teh turbo the exhaust runs back into each other in the downpipe.

The point of twin turbo is to run a small turbo so you get boost at low rpm's but arent good for top end, Example: T25
And then run a big turbo on the other to get Mad top end but it wont get fully spooled until 4 - 4500 rpm which would be when the T25 would start to be non-effective. Example: 20g or Frank 7

 

[phatridztsi]

There are two kinds of twin turbo setups. TWIN turbos are used on v'8s and v6's where there are 2 identical turbos, one on each exhaust manifold, what str8ballin is talkin about is sequintial turbos, that kind of setup is used on an rx-7 and could effectively be used on a 4cyl

 

[GoFastTSI]

It's already been done. Doug's Dynopower with a twin turboed Laser utilizing two T-25's on a custom manifold. From talking with him, he said the setup was a #@%#@%#@%#@%#@%, but it put in the neighborhood of 500 output.

 

[mrfloppy]

Ever hear of a stock 93+ Supra with TT? Does it have a inline motor? Yes. 300ZX TT? Same thing.

I think its just easyer to have a single turbo on a I4. TT would have to mean one small turbo and one big turbo ( like SUPRA TT ).
I could only see that as the advantage with a TT on a DSM. Say you have a 14b and a 20G. Not saying the setup is just a bolt on deal, but the 14b could spool up for pickup, and the 20G could carry it after say 4,000 Revs. Its basically only to help get rid of the lag the 20G has. So you would be spooling all the time.
I have heard of a GSX in the Chicago area with TT. Have no idea of times, but suppose to be a #@%#@%#@%#@%#@% towards Supra's and RX7's around here. I have no idea what else is on the car. However he is tackling the big boys, so I have to give him props for that.
Anyways..... Stick to a single turbo. Use nitrous as you back up support. TT is just to much work...... o.... and good luck if you can stick that on you car. The windshield washer tank is in your trunk, now try finding room for another Turbo with out some alterations.
Erik

 

[Oreopride18]

"Ever hear of a stock 93+ Supra with TT? Does it have a inline motor? Yes. 300ZX TT? Same thing. "

You can turbocharge an engine no matter what the setup of the cylinders are. Inline, V, Horizontally opposed...they all can twin, single, or seqeantially turbo. 300ZX's have been and always have been V's, not inlines. And almost everoyne is mixing up seqentual and twin turbo. A twin turbo means the truboes being used are TWINS. That means two T-25's, two td06's, two T-67's, and so forth. This is a TWIN TURBO setup. 300ZXs, Supras, and RX-7's have this kind. A SEQENTIAL turbo setup is when one is small for low end spool up and a second one is on for big time spool up. Mr-2's (I'm pretty sure they do) have a seqential setup. Their is a huge difference between the two. As for it working on a DSM sure, it's easy to say anything will work with a litte buit of money. But for about $3000 you can have a DSM running 11's easily. A custom twin/sequantial turbo system will run you well beyond that and the gains will not be worth it. If you were going to do something like that then running a T-25 for a small turbo and a T3/T4 Hybrid as your big one will be more than just fine.

 

[TommyTheCat]

The whole reason no one really uses a TT setup on a I4 is purely money issues. Its more worth it to dump your car and buy a supra/rx7/300zx/etc. If you really want TT, dont use a four-banger.

And as Oreopride put it, twin turbos aren't sequential. An rx7 has two "intake manifolds" on it(two rotor housings). A 300zx is a v6. A Supra (correct me if I'm wrong) I thought had two intake/exhaust split between front 3 cyl. and the back 3. cyl.

 

[98TsiAWD]

Originally posted by Oreopride18
"Ever hear of a stock 93+ Supra with TT? Does it have a inline motor? Yes. 300ZX TT? Same thing. "

You can turbocharge an engine no matter what the setup of the cylinders are. Inline, V, Horizontally opposed...they all can twin, single, or seqeantially turbo. 300ZX's have been and always have been V's, not inlines. And almost everoyne is mixing up seqentual and twin turbo. A twin turbo means the truboes being used are TWINS. That means two T-25's, two td06's, two T-67's, and so forth. This is a TWIN TURBO setup. 300ZXs, Supras, and RX-7's have this kind. A SEQENTIAL turbo setup is when one is small for low end spool up and a second one is on for big time spool up. Mr-2's (I'm pretty sure they do) have a seqential setup. Their is a huge difference between the two. As for it working on a DSM sure, it's easy to say anything will work with a litte buit of money. But for about $3000 you can have a DSM running 11's easily. A custom twin/sequantial turbo system will run you well beyond that and the gains will not be worth it. If you were going to do something like that then running a T-25 for a small turbo and a T3/T4 Hybrid as your big one will be more than just fine.

The 90-96 300ZX is an INLINE 6, were tehy v's before that?

 

[GoFastTSI]

The 300ZXTT is a 3.0L V6

 

[mrfloppy]

I could have sworn that the Supra TT turbos were two different kinds. My friends '94 seems like it even. You can feel the first turbo die at like 3K-3500K die down and another one pick right up. If they were identical both turbos would dump under 4K. I assume that a Supra runs higher then 4K

I could be wrong..... I don't dable with big boy toys much.

Erik

 

[GoFastTSI]

Mr-2's (I'm pretty sure they do) have a seqential setup.

MR-2s are single turbo, you're thinking that the twin scroll turbo they use is two. It's just a dual entry system which is worthless.

This is a TWIN TURBO setup. 300ZXs, Supras, and RX-7's have this kind.

Ummm, Supras and RX7s both utilize the sequential system, one smaller for quick spool and larger for top end. 300ZXTTs on the other hand are a true V6 twin turbo setup, and a PITA to work on for reference.

 

[2-0turbo]

Originally posted by str8ballin


The 90-96 300ZX is an INLINE 6, were tehy v's before that?

NO! 1990-1996 uses the VG30 based, 3.0 liter 24 valve, 60 degree V6.

 

[2-0turbo]

Originally posted by GoFastTSI

MR-2s are single turbo, you're thinking that the twin scroll turbo they use is two. It's just a dual entry system which is worthless.



Ummm, Supras and RX7s both utilize the sequential system, one smaller for quick spool and larger for top end. 300ZXTTs on the other hand are a true V6 twin turbo setup, and a PITA to work on for reference.

I cannot speak for the Supras, but yes the RX7 (FD3S) uses a sequential setup. However, it has two turbos that are the same size. All exhaust goes through one at low speed and both at higher speed. Once boost hits (which is like 2000 RPM on that engine), the wastegate for the first turbo opens and dumps into the second turbos turbine, "pre-spooling" the turbo. Keep your foot in it, and at about 5000 RPM, the second turbo comes online. Both turbos then run full-tilt until redline, dumping excess exhaust through the wastegates into the exhaust.

 

[mrfloppy]

Originally posted by 2-0turbo


I cannot speak for the Supras, but yes the RX7 (FD3S) uses a sequential setup. However, it has two turbos that are the same size. All exhaust goes through one at low speed and both at higher speed. Once boost hits (which is like 2000 RPM on that engine), the wastegate for the first turbo opens and dumps into the second turbos turbine, "pre-spooling" the turbo. Keep your foot in it, and at about 5000 RPM, the second turbo comes online. Both turbos then run full-tilt until redline, dumping excess exhaust through the wastegates into the exhaust.

Well Put!

 

[FourG63 97GST]

An do a turbo get the exhaust from all 4 cylinders or just 2, maybe 1.
understand what i'm tryin to ask?

 

[98TsiAWD]

Originally posted by 2-0turbo


NO! 1990-1996 uses the VG30 based, 3.0 liter 24 valve, 60 degree V6.

I'm a moron, you guys are right, its a V6. I thought supras and 300zx were inlines, what was i thinkin!!??

 

[Oreopride18]

your right...Supras are inline

I never knew that about the RX-7. They have always been called (and listed) as RX-7 TT. I've seen them at shows and have always seen the two exact same turboes. So I guess it uses twin turbos that work sequentially? That must be it.

And one thing I forgot to mention. Most of the 11 second Supra/Skyline/300ZX's switch over to a single HUGE turbo (like a T-77 series)

The MR-2 thing was my bad. I was trying to remember....one of hte early 90's imports were the first commercially offered sequantial car ever. I'm starting to think it's the RX-7.

And Supras have always come stock with Twins...well, since 93.5.

 

[dsm_racing`]

Just to let you know Supras are not inline and not all of them came TT stock

 

[3NiGm4]

My friend has a '94 supra-tt, and it is an inline 6, and he does have 2 different sized turbos.

 

[98TsiAWD]

Originally posted by 3NiGm4
My friend has a '94 supra-tt, and it is an inline 6, and he does have 2 different sized turbos.

I know 93.5+ supras are inline 6 FOR SURE. Dont they come with the same size turbo tho? Just the RX-7 uses a small and a big one?

 

[2-0turbo]

Originally posted by dsm_racing`
Just to let you know Supras are not inline and not all of them came TT stock

Wrong and right. The Mk IV Supras are all inline sixes, 3.0 liters. I believe the earlier ones were too, but I don't know for sure and don't feel like looking it up right now. Yes, you are right, they made a NA version too, but they were all inline sixes (turbos and NA).

 

[Silent2g]

history time kids. the z car series was changed to a v6 aka VG series back in 84. they stuffed that motor in the maxima till 92 when the se for the ve. which changed into the vq

now back to the tt thing.
you do realize the fastest supra's and rx-7's in the world do not use twins for a reason.

twins are fine to a certain extent.

could years back there was a crx with a b16 and twins in it. why, no clue.

 

[3NiGm4]

Why would they not use twins? I thought that you would have a greater outcome if you had 2 turbos

 

[Oreopride18]

I mean that all the Supras that came stock turbo were ALL twin turbo. There was never a big turbo, stock Supra. They have all been inline 6's.

Yea, 300ZX's have always been V6s. Again, if you want to talk about the other Z cars (240, 260, 280Z) then those were inline 6 2.0-2.4's. There was only one year where there was a nissan 280Z. otherwise the 300Z has always had the V configuration.

The reason to switch to a single turbo is that it simply makes more sense. Two turbos mean you pushing two turbos. Going "bigger is better" doesn't always work. Why don't we just put a Green turbo on your stock car and make it run? Because your engine can't handle it. It's easier, cheaper, and much more effective to run one huge turbo over two smaller twins. You could argue that the sequantial system is the best but for the safe side a single turbo application works. If the Supra could handle twin T-77's on a streetable car i'm sure everyone would do it. But it is a 4000+ pound car that runs on an inline 6....it takes a lot of power to make that thing competive (it's a little worse than the Mitsubishi 300GT VR-4 in the weight class)

As for specs of the cars, quite arguing and go to www.supercars.net. They have the specs on all the above cars and you will clearly see that Supras are inline 6's (3.0 TT if applicable) The 300's have always been V6 3.0 and Rx-7's have always been rotary 1.3 TT (but it doesn't run like a twin apparently)

 

[hos]

was wondering if anyone has done it and how it is working out so far. i am from toronto canada and if anyone knows about any good shops i can take my car (98 tsi) too please leave some info