Kinugawa Td06-25G On Fresh Rb25 S1

[jdm32r]

Can I get some opinion on what u guys think of my dyno result I think it's a bit lazy but professional opinion would be great. Someone told me that the tuner may not have tuned in the vct on the 25 as this haltech was bought second hand from a rb20 which did not have vct could that be much of a issue with not seeing full boost earlier?

Decided to try out the kinugawa td06 -25g turbo still a jap made turbo but had some issues with over boost and had to do some mods on the rear housing waste gate hole.

Fresh rebuilt rb25det s1

Td06-25g kinugawa 18psi on

Stock low mount manifold

254 cams

1000cc

460lph walbro pump

E85

Ffp

Splitfires

Haltech platinum pro ecu

Coming soon: haltech boost controller.

[hyper-gear]

T67 is a mismatched Taiwan copy, not Jap at all.

By looking at the curve, it is horribly laggy, and very little power on E85 fuel.

First of all need to sort out boost control issues by installing a much larger gate.

Check your cam timing and make sure they are in the right spots, if that is wrong it can cause unexpected turbo lag and lose in power.

I'm using Heltech platinum Pro ecu on my GTR, there is a option in the software for VCT. Experienced tuner would have had that sorted, a easy way to test it, is to see if any differences in drive ability with the vct plug removed.

[Guilt-Toy]

that car would be horrible to drive.

I thought about buying one of those for a while, but never actually saw anyone very happy with one so far.

would be interesting to see if you sort it out, need a extra 100hp at 125km/h at least.

[Lithium]

that car would be horrible to drive.

I thought about buying one of those for a while, but never actually saw anyone very happy with one so far.

would be interesting to see if you sort it out, need a extra 100hp at 125km/h at least.

Read SimonR32's thread on Kando turbos - there are masses of examples. There looks like there is probably an issue with the setup on this one.

[Badgaz]

what boost control are you using? thats really sad response from the turbo... i ended up changing my VCT switch off point to 5100rpm....the greatest increase in torque we saw from my setup came from boost control.

[jdm32r]

Thanks guys appreciate the input

[#skyginer]

Maybe the turbo is just too big for the 25, isnt a td06 25g larger then the t67? With a td07 core and wheels?

[#skyginer]

Just going by your manifold pressure graph anyways

[jdm32r]

Maybe the turbo is just too big for the 25, isnt a td06 25g larger then the t67? With a td07 core and wheels?

I couldn't tell u to be honest do you think it's cause it's a stock manifold it's loosing efficients? It's a cammed 25 running e85 I thought it wouldn't have any trouble with that turbo size

[Dale FZ1]

You really need to know what is the turbine spec. Is it a TDO6SL2, or a TDO6H? The difference between those two is roughly equivalent to the difference between GT30 and GT35 in Garrett product so fairly significant.

And is the turbine 10cm or something else?

[AngryRB]

no overboosting happening there, its the opposite, graphs looks like the gate could be stuck open, full boost at 7500rpm? May as well just bolt on a GT40

Edited November 24, 2014 by AngryRB

[jdm32r]

You really need to know what is the turbine spec. Is it a TDO6SL2, or a TDO6H? The difference between those two is roughly equivalent to the difference between GT30 and GT35 in Garrett product so fairly significant.

And is the turbine 10cm or something else?

Hey man it's a TD06H and it's a 10cm. So it's equivalent to which exactly?

[jdm32r]

no overboosting happening there, its the opposite, graphs looks like the gate could be stuck open, full boost at 7500rpm? May as well just bolt on a GT40

Wouldn't happen to know a specialist around south east Queensland that I can have look over my turbo set up?

[Dale FZ1]

It's very lazy coming up onto boost as per earlier comments.

Maybe throw up a pic or two of your setup?

100% agree with Stao you need to be confident that the cam timing is set correctly. Not just lining up timing marks, but by using a degree wheel to know with certainty the valves are opening/closing when they should be. With that resolved first, then move to the turbo.

You appear to have gone with a 10cm IW turbine housing? General consensus is that those ones aren't good at permitting proper boost control, and boost response is also average. But it's one of those talked-about points on a forum and I have no direct first hand experiences with that turbine setup. Thinking you will have to play with it a bit to get a reasonable understanding of the truth.

Three things I would look at are the wastegate actuator spec, correct/best setting of its preload, and setup of your boost controller. It's looking so lazy to come on that it makes me wonder if the wastegate valve is just blowing open.

The impeller OD sizes on the turbo you have are roughly 78mm (comp), 67mm (turbine) which gives a very rough correlation to a GT3576. 10cm housing roughly equivalent to a 0.63 A/R.

On an RB25 with cam upgrade and everything setup properly it's probably fair to think you would see it making best torque across 4500-8000rpm. Under 3500 it's not going to be responding super-quick.

[jdm32r]

It's very lazy coming up onto boost as per earlier comments.

Maybe throw up a pic or two of your setup?

100% agree with Stao you need to be confident that the cam timing is set correctly. Not just lining up timing marks, but by using a degree wheel to know with certainty the valves are opening/closing when they should be. With that resolved first, then move to the turbo.

You appear to have gone with a 10cm IW turbine housing? General consensus is that those ones aren't good at permitting proper boost control, and boost response is also average. But it's one of those talked-about points on a forum and I have no direct first hand experiences with that turbine setup. Thinking you will have to play with it a bit to get a reasonable understanding of the truth.

Three things I would look at are the wastegate actuator spec, correct/best setting of its preload, and setup of your boost controller. It's looking so lazy to come on that it makes me wonder if the wastegate valve is just blowing open.

The impeller OD sizes on the turbo you have are roughly 78mm (comp), 67mm (turbine) which gives a very rough correlation to a GT3576. 10cm housing roughly equivalent to a 0.63 A/R.

On an RB25 with cam upgrade and everything setup properly it's probably fair to think you would see it making best torque across 4500-8000rpm. Under 3500 it's not going to be responding super-quick.

Learning more of you then I could find anywhere else about this turbo and it's issues. You are a big help thanks.

[Dale FZ1]

Do you know what spec wastegate actuator this turbo has? If the plan is to run it up to/over 20psi then by rights you'd do best with an actuator rated up in that range. With preload correctly set, you'll stand a chance of keeping the wastegate valve properly seated for longer and get a more reasonable rate of boost rise.

Probably worth checking what is available from various suppliers. Try the likes of Kando, Hypergear, and GCG.

[XKLABA]

Three things I would look at are the wastegate actuator spec, correct/best setting of its preload, and setup of your boost controller. It's looking so lazy to come on that it makes me wonder if the wastegate valve is just blowing open.

The impeller OD sizes on the turbo you have are roughly 78mm (comp), 67mm (turbine) which gives a very rough correlation to a GT3576. 10cm housing roughly equivalent to a 0.63 A/R.

This, except I believe the T67 is essentianally the same as the TD06SL2 which is 61mm/54.1mm exhaust wheel, so essentianally what you have is a TD06SL2-25g

It looks to me that your wastegate is creeping open early and making it slowly rising to full boost, try tightening it and adding a good electronic boost controller

[Dale FZ1]

^^ post #12 he confirmed it is a TDO6H-25G 10cm.

Bigger turbine impeller than a TDO6SL2-25G

Off topic, the main difference between the T67-25G and the TDO6SL2-25G appears to be the diameter of the centre shaft, and the centre bearing housing (non water cooled vs water cooled) configuration. Compressor housings seem to vary between 0.7A/R with 4" inlet snout, and 0.6A/R with 3" inlet snout. But the impellers are the same on both of those units.

+2 for wastegate spec and setup as per previous.

[XKLABA]

^^ post #12 he confirmed it is a TDO6H-25G 10cm.

Haha yeah just reread that, Stao mentioning a T67 throw me off and I assumed and we all know what happens when one assumes

That still isn't that big of a single turbo for a 25, I'm looking at two TD06SL2-20Gs for my 30 and still expect better response then that

[D_Stirls]

A T67 and a TD06SL2 run the same turbine and generally the turbine and shaft are matched, where did you hear that the centre shaft diameters are different?

As far as i'm aware a T67 and a TD06SL2-25G are two different names for the same turbo with maybe only the housings being different.

Regarding the OP +3 on looking at the wastegate/actuator

EDIT!!

Well what do you know there are two different shaft diameter version of the SL2 turbine that vary by 1mm. There is a listing for a TD06SL2-20G (9mm) and then the T67-25G (10mm) listing, it seems that they match the centre shaft to the compressor not the turbine. Also I thought that there was only one SL2 Wheel and that it had 9 blades, they are showing an 11 blade version as well?

http://shopping.kinugawaturbo.com/mitsubishi-3.aspx

Edited December 4, 2014 by D_Stirls