Yeah I think Precision Turbo started the "billet wheels spool faster" myth. I've never seen it, and for me it's all about the added flow.

going from 110g to 100g would be hard to notice.
going from 71g to 61g would be noticeable. spool from low rpm to boost threshold wouldn t change much. maybe 50-75rpm faster. but transient response would be quite different between the two, and very noticable

See next post cause I decided to keep the car and finish the build...

Ported, polished, and bored to fit the wheel perfectly

Hoping to have a fun little 16g once I get it bolted to the CHRA and installed during over Christmas...

Ppayer38 said:

Ported, polished, and bored to fit the wheel perfectly

Hoping to have a fun little 16g once I get it bolted to the CHRA and installed during over Christmas...

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No such thing

Boosted98gsx said:

No such thing

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I think we all know what he meant.


I love all this renewed interest in the mhi platforms as well. I just recently went to a 7 blade hx35 from a 20g(I've tried the wheel with tdo5h/7cm and td06h with 6 and 7cm housings) and i really wisah I wouldn't have. the 20g is my favorite turbo periodf for a fun street car. I am definatly putting a new 20g together in the coming month, but its going to be difficult with all these new aftermarket whee;s and turbines to choose from.

Evo X is what kept the MHI platform alive. Every wheel you're seeing here can be used on a Evo X CHRA since it shares the same TD05H turbine as the 14B did 20 years prior.

RWD4G63 said:

Yeah I think Precision Turbo started the "billet wheels spool faster" myth. I've never seen it, and for me it's all about the added flow.

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Hub area and blades are machined thinner than cast so the wheel ends up lighter from having less rotational mass. This technically results in quicker spool, although many times the difference is so minimal that you'd never feel it on the butt dyno.

Here's another thing to consider....almost everyone who reports spool differences is choosing one of the billet wheels as a larger upgrade- example, going from a Big 16G to a 20G. Obviously a 20G inducer is larger, so any weight savings by going to billet is negated just because the wheel itself is larger. Hardly anyone has run a cast 20G and billet 20G back-to-back and reported results.

I will try and get logs up for the MHI wheel vs. one of the newer billet designs after the new year. i actually have tons of data to post up for 20g's. I spent the last year logging intake pressure vs. backpressure on the various 20g combos.(td05h 7cm, td06h in 6cm and 7 cm. I guess ill post a whole thread up after i put togewther a new billet 20g. I really want to try the 8cm housing as well now that they have become easily available. i had tried for about 3 years to find one from an old green with no luck. I have been using a 20g variation since my first 92 tsi awd back in 1996. I have tried quite a few turbos over the years and i always go back to it.

The 16g and the 20g are just amazing wheels. They punch way above their weight. There are so many turbo options out there, and these things are still just as relevant as they have always been

Seamus said:

I will try and get logs up for the MHI wheel vs. one of the newer billet designs after the new year. i actually have tons of data to post up for 20g's. I spent the last year logging intake pressure vs. backpressure on the various 20g combos.(td05h 7cm, td06h in 6cm and 7 cm. I guess ill post a whole thread up after i put togewther a new billet 20g. I really want to try the 8cm housing as well now that they have become easily available. i had tried for about 3 years to find one from an old green with no luck. I have been using a 20g variation since my first 92 tsi awd back in 1996. I have tried quite a few turbos over the years and i always go back to it.

The 16g and the 20g are just amazing wheels. They punch way above their weight. There are so many turbo options out there, and these things are still just as relevant as they have always been

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would like to see that data

Seamus said:

I think we all know what he meant.


I love all this renewed interest in the mhi platforms as well. I just recently went to a 7 blade hx35 from a 20g(I've tried the wheel with tdo5h/7cm and td06h with 6 and 7cm housings) and i really wisah I wouldn't have. the 20g is my favorite turbo periodf for a fun street car. I am definatly putting a new 20g together in the coming month, but its going to be difficult with all these new aftermarket whee;s and turbines to choose from.

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We do? Do you know the tolerance stack ups from the CHRA to shaft to the wheel? There is no such damned thing as "perfect".

Boosted98gsx said:

We do? Do you know the tolerance stack ups from the CHRA to shaft to the wheel? There is no such damned thing as "perfect".

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I mean if you wanna be anal about it the turbo was given to a shop in my area which rebuild industrial turbines and turbos for heavy machinery, planes, etc. I had them take it apart measure and apply the old tolerances to the new housing/wheel and mate it to the CHRA all with me standing and watching over the whole process. If it met the specs of MHI it meets my specs so to me it is perfect. If you want it any closer then I would like to see how you do it and please post a write after you are done.

I know yor knowledgeable and have/had a BA 16g at 1 time so I'm not knocking you at all but no reason to hate on others comments.

But I agree there is no perfect setting/measurement as it is a relative termcause while I'm building torpedo tubes and VLS systems for submarines at work it can always be better, closer, tighter, and tougher!

94awdcoupe said:

would like to see that data

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me too, please.

Buy on get one free till the 25th. From snail. And some deals from new sellers in the billet game.

20g billet | eBay

Just pulled the trigger on one from hp turbo.

sqr said:

Buy on get one free till the 25th. From snail. And some deals from new sellers in the billet game.

20g billet | eBay

Just pulled the trigger on one from hp turbo.

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Just got a billet 18g from hp turbo myself. Really nice wheel and spoke with the seller over the phone. Very friendly and knowledgable.

Kawasaki 20G, Snail 20G, standard (cast) MHI 20G:




Snail 20G.




Kawasaki 20G:




Oddly enough, the blade shape of a Kawasaki 20G sure seems to resemble that of another popular (and much larger) 6-blade wheel:

Kawasaki 20G, Snail 20G, standard (cast) MHI 20G:




Snail 20G.




Kawasaki 20G:




The Kawasaki wheel is noticeably lighter than the Snail wheel. It's also a good bit cheaper, and it appears the blade design is a little better. If you're known to damage compressor wheels or don't run an air filter, the Snail wheel is definitely for you.


Oddly enough, the blade shape of a Kawasaki 20G sure seems to resemble that of another popular (and much larger) 6-blade wheel:

those pics better portray what I observed. the KTS wheel should work very well. I did notice the blade contour was shaped very different from other 20g wheels. I like that last pic. shows the design change is proven . now I wonder if the wheel will resist surge better?

Saw Kawasaki at SEMA. Can't wait to see results!

Damn i cant wait to use that Kawasaki 20g td06sl2

Where can you purchase a Kawasaki 20G wheel?

Usually you have to go thur kawasaki turbo system.. but! Hp turbo is have a close out on there 18g kts billet wheels for 60 shipped!

td05/td06 Billet Aluminum Compressor Wheel, hpturbo.com

boostin90gs said:

Usually you have to go thur kawasaki turbo system.. but! Hp turbo is have a close out on there 18g kts billet wheels for 60 shipped!

td05/td06 Billet Aluminum Compressor Wheel, hpturbo.com

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I think they need some order on their website.

They have 4 wheels listed a td05/td06 wheels, all are 18g at various prices.....

60 bucks a a billet 18g wheel with .01 cent shipping apparently....just bought one. To bad they didnt have any 20g listed, I payed 135 on ebay, damn them.

agentorange313 said:

I think they need some order on their website.

They have 4 wheels listed a td05/td06 wheels, all are 18g at various prices.....

60 bucks a a billet 18g wheel with .01 cent shipping apparently....just bought one. To bad they didn't have any 20g listed, I payed 135 on ebay, damn them.

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I ordered the $135 20g from ebay also. No ideal what style it is. I suspect it will not be the latest greatest. The picture was a double 6 blade. There web site has generic pictures for the cummins stuff as well.

Running a kiwanza 20g with surge ported cover now.

sqr said:

I ordered the $135 20g from ebay also. No ideal what style it is. I suspect it will not be the latest greatest. The picture was a double 6 blade. There web site has generic pictures for the cummins stuff as well.

Running a kiwanza 20g with surge ported cover now.

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It was a KTS billet 20g design, from the pictures I could tell that it is indeed the upgrade design, without the swept blade edges, it has straight edges. It should be the same as the picture Jus posted of the Kawasaki Turbo System (KTS).

sqr said:

I ordered the $135 20g from ebay also. No ideal what style it is. I suspect it will not be the latest greatest. The picture was a double 6 blade. There web site has generic pictures for the cummins stuff as well.

Running a kiwanza 20g with surge ported cover now.

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If i remember that one is an extended tip as well?