Turbo Choice - 2 Litre Straight Six - Non Nissan

[eightsixboy]

Hi all,

Thought I'd ask the knowledgeable people on SAU this.

I looking for a good turbo for a Toyota 2 litre straight six (1GGTE). Basically chasing 220rwkw + without excessive lag. I would just buy a 2530 but don't really trust second hand turbo's, especially when new ones are cheap.

I have narrowed it down to the Kinugawa TD05 18G and the TD06 SL2 18G.

http://www.ebay.com.au/itm/271264269898?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649

http://www.ebay.com.au/itm/281156507798?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649

Basically I'm looking at turbo's that would normally be used on an RB20.

What do you guys think?

[Kane_R32]

TD05-18G (8cm). Tad laggy, makes fully boost around 4500rpm (22psi)

[Cowboy1600]

http://www.hypergearturbos.com/atr28.html

[Lithium]

I assume you are going T3/external wastegate setup? I'd go a Kinugawa TD05-16G - much better spool and response than the 18G and well capable of 220rwkw, there is virtually no difference in flow potential between the two compressors.

[eightsixboy]

Sorry should have mentioned it but I'm 95% on going internal gate.

I have read the IG versions have had boost creep issues which is a bit of a worry.

[eightsixboy]

http://www.hypergearturbos.com/atr28.html

Thanks, I forgot about hypergear.

[NismoSTune]

Hmm something precision or EFR 6758

[Lithium]

An EFR6758 would be amazing on it (aside from only being T25 flange), or a GTX2863R - if OP is willing to splurge that much. Precision don't really do much in the right size range.

[eightsixboy]

Might be a bit more then I want to spend, trying to keep cost down a little as its not exactly going to produce big power.

[GTScotT]

TD05H 16G6 is definitely your best budget oriented option.

Make sure you port the WG flap or order a ported one from kando and you will be sweeeet.

[eightsixboy]

Were there issues with the 16g and 18g with boost creep?

Kinda annoying that they would sell a turbo you have to modify due to issues.

[Lithium]

We definitely had issues with boost creep with an internally gated Kando TD05-16G on an SR20DET, but it was easily fixed with a bit of porting - the OEM Mitsubishi TD05s even had the same issue if you opened the exhaust up too much. I think OEM Supra and RX7 turbos can have the same issues as well, even some HKS internally gated turbos have been known to boost creep... its not that unusual with an internally gated turbo unfortunately.

Here is are dyno plots for the 16G I tuned on a stock SR20DET, just did some porting to the wastegate port:

[scotty nm35]

They might work fine on the stock map, but wind them up to maximum flow and all the flaws become evident.

Internal gates have never been a great design and generally flow like crap, as well as upsetting the main exhaust flow through the turbo. BW has taken a step in the right direction with the efr but at nearly twice the length not many of us have the room for one. A hidden external gate off the housing is the best option imo.

[eightsixboy]

Thanks for the replies.

I don't know what to do now .

As I'm going to be fabricating the dump and manifold myself I guess I should go external gate then, I just don't want to go through the extra expense and hassle of it if at a lowish power level of say 220rwkw it makes no difference between IG and EG.

[scotty nm35]

So why go a larger turbo at all if you don't plan to lean on it?

[eightsixboy]

Because the stock twins are only good for 190rwkw max, even then I have only seen 1 car make that on the stock twins, most make 170-180.

I would like 230rwkw or so, figured I would upgrade to something that would make that power pretty easily and have the potential to make alot more if I want to later down the track. No point chasing 270rwkw or more now as the stock motor wont handle that, and to be honest I would like to just get the best out of stockish motor.

[Marcus89]

Is it possible to get the twins highflowed would save heaps of hassle if you could just do that

[jet_r31]

probally best to ask stao at hypergear, he would know..

cheers

darren

[eightsixboy]

Cost wise it would end up been a lot more expensive getting the twins highflowed, I would guess around $1500+ to do both? That plus dump pipe fab, it'll end up costing about the same as going single.

HKS made a 'highflow' version of the stock turbo's but they apparently are only good for low 200's, so not exactly a massive improvement over the stock ones.

[GTSBoy]

Plus the whole tiny CT12 twin setup is so nasty on those things. The exhaust manifolds are nasty, the turbos are nasty, the dumps are nasty. A single with modern aero and some room to install a decent manifold and dump would have to be umpty bazzillion times better.