I'm wanting to know what the pros and cons are between a TD05 in standard trim with a "small" 16G wheel and housing compared to the same turbo with a "big" 16G wheel and housing. The inducer and exducer are 46.4mm and 60mm respectively on the so called small turbo and they are 48.3mm and 68mm on the big turbo.

The reason I ask is because I'm converting a top entry TD05 to front entry and if there's a plus to going to the big setup I'll just buy the new wheel as well as a new housing.

Just to throw another ingredient in to the mix, what about 18G? How does that compare to the 16G options?

 

I think in general the bigger you go the more top end you will gain but at a sacrifice to earlier spool, aim for the smallest turbo to meet your power requirements.

 

THIS!!!.SJ.

 

Is it really as open and shut as that?

I'm kinda thinking from suitability to my engine and needs point of view. Maybe should have said that from the start. I'm changing from a TD04 on a UK Turbo. I have ESL, FMIC, Nur Spec R, full de-cat, changing to 440s, SWRD 255 pump. I want to sit around the 300bhp mark to save the gearbox until sometime in the future when a better box could go in.

 

At 300bhp a vf35 would be a good choice, more top end than the td04 with good spool and with a bit of headroom for later on (up to 340ish) and fairly easy to get hold of and relatively cheap at circa £300.. td05 16g would be another popular choice too.

 

Well the inducer is barely 2mm more on the the bigger housing and exducer 8mm bigger! So i would assume low spool would be similar but more top end with bigger housing.

 

By the way,i have vf35,fmic and have 320bhp and the turbo feels like it has loads more to give. Little bit laggy due to fmic but when on boost it flys!

 

I personally wouldnt replace a vf35 for tdo5 16g as its not much of an upgrade if any, now a 20g maybe lol. I personaly dont mind lag as such as it just means u may have to change down a gear before you get going and thats half the fun of driving. But once your going there is no lag as it stays in high revs and puts a huge smile on your face

 

Spot on guys, that's the stuff I was after! I already have a decent TD05 stripped down for a bearing and seal kit, a new housing and by the look of things a new wheel. Kinugawa have replied to me too and recommend fitting the big 16G wheel for the same reason mentioned above, no real loss of spool but more top end!

 

For 300 bhp this would be my choice, taken from andy forrest's site

AFP4H – is based on a TD04 this is available new or fully re-manufactured on an exchange basis. It is fitted with a new high efficiency, high flow rate compressor wheel and compressor housing which is capable of maintaining the fast spool up rate typically associated with the TD04 but with the ability to run higher boost efficiently over a wider rpm band. This turbo has been tested to levels in excess of 320lbft and 320bhp. With full boost still coming in as low as 2500rpm on a 2.0

£450 exchange (includes 12 months warranty)

If you require an exchange unit prior to removal of your own turbo, then add a £150 returnable deposit, this will be refunded on receipt of your old unit in acceptable condition ie no broken castings etc.

 

+1

 

The "big 16g" is an 18g no?
I see you have your 16g stripped down ready for new bearings, are you using genuine bearings or pattern parts lol?
Did you mark the shaft/wheel/nut for re assembly?

 

Some spec for mitsubishi turbos

MHI Turbine Wheels
Wheel Exducer (in.) Inducer (in.) Trim
TD04 1.57 1.86 71
TD04L 1.62 1.86 76
TD04H 1.74 2.04 73
TD04HL 1.80 2.05 77
TE04H 1.88 2.01 87
TD05H 1.93 2.20 77

Turbocharger Wheel-Size Comparison
Turbo Compressor
Wheel Inducer Diameter(in.) Exducer Diameter(in.) Trim Housing
TD04-09B 9B 1.365 1.930 50 TD04-09B
TD04-13G 13G 1.580 2.000 62 TD04-13G
TD04-13T 13T 1.597 2.203 53 TD04HL-13T
TD04-15G 15G 1.625 2.187 55 TD04-13G bored
TD04H-15G 15G 1.625 2.187 55 TD04H-15G
TD04H-15C 15C 1.654 2.187 57 TD04H-15C
TD05H-14B 14B 1.695 2.285 55 TD05H-14B
TD04-16T 16T 1.713 2.205 60 TD04HL-16T
TD04-18T 18T
TD04-17G 17G 1.744 2.382 54 TD04-13G bored
TD04-19T 19T 1.809 2.283 63 TD04HL-19T
TD05H-14G 14G ~1.80 2.285 ~62 TD05H-14G
TD05H-16G "small" 16G small 1.830 2.365 60 TD05H-16G
TD05H-16G "large" 16G large 1.892 2.680 50
TD05H-18A 17C 1.900 2.680 50 TD05H-16G bored
TD05H-16G6 (Evo 3) 16G6 1.902 2.680 50 TD05H
TD05H-18G 18G 1.992 2.680 55 TD05H-18G
TD05H-20G 20G 2.070 2.680 60 TD05H-17C

 

Seems that the large 16g, 18g and 20g all use the same wheel as the exducer is 68mm on them all. The difference is in the inducer size, wheel and compressor housing machined to suit

 

You can buy an 18g comp housing and wheel to put on your turbo;
http://pages.ebay.com/link/?nav=item.view&alt=web&id=131124853045
But be aware it's not genuine mitsubishi (Chinese id say) so it won't work

 

Yes everything has been marked, not my first rodeo

I'll be using genuine parts as the whole genuine rebuild kit is about £70. Pretty good.

Any reason why you say the pattern kit simply won't work? That's a Kinugawa housing you've linked and it's the one I looked at earlier. They seem to be made in Japan and people on here have a decent regard for them.

 

Oh, thanks for all the turbo specs too

 

I was being sarcastic, people need to get over the whole china turbo thing. EVERYTHING is made in china now, I doubt very much kinugawa turbos are Japanese. Maybe rebranded in japan.
Bearings are bearings, they will be fine no matter who makes them. Sounds like you know what your doing with the rebuild, too many people are scared by turbos, failure very rarely effects the engine.
Good luck with the rebuild

 

Ah right, sorry lol! And very true on the China thing. Kinugawa will stand over their stuff anyway so I'm happy enough and for what I paid for the turbo, if it goes bang, I'm not overly bothered. I thought the genuine rebuild kit would be best because it's only £20 more than a pattern job.

I ain't afraid of no turbo lol! Oh, and well done with your gearbag swap

 

Cheers, I just need to keep it in driveshafts now...
I'm planning on running it on the 1/4 start of next season, then a bit more power and see where I can go with it. Be nice to do some 12's again