A few questions about a 20g (I've searched!)
 

I have done a lot of searching both on HMT and on HT, but I am still inconclusive about how a 20g would perform on a b16. I am shooting for 240whp, or whatever it takes to make my eg rip really, but no more than 250. This is a stock block setup, and I don't want to blow her up.

The seller said this about the snail I am interested in
"its used but rebuilt, i know its a stock 16g exhuast housing but its a bigger compresor housing. I think its either a 18g or 20g setup but i also know the wheel has been cliped (if you dont know what that is it makes the turbo more sutible for top end flow) and i also belive the housing has been ported"

What do you guys think? My hatch is for a street setup with a few track days. I want full boost by 4.8k, and I don't plan on more than 8 or 9lbs. Like I said, whatever it takes to feel fast and thats THAT. I am too cheap to go real fast, its already an expensive enough toy ;p

So I am mainly looking for feedback from people smarter than I about the snail, and I would love experience!

Thanks guys :)

BTW, the setup will *primarily* composed of:
Lovefab B-series manifold (whatever he calls his new design)
DSM 450s
Snail is internally gated
2.25 - 2.5'' IC piping, I am undecided
2.5'' DP
3'' exhaust with no cat
CCA intercooler
TurboXS bov
MBC

And bla bla bla, all the misc other things that I am too lazy to type.

EDIT: Pics! How does it look? Linked cause they are so big..
http://www.forgedweb.com/untitled1.jpg
http://www.forgedweb.com/untitled2.jpg
http://www.forgedweb.com/untitled3.jpg
http://www.forgedweb.com/untitled4.jpg
http://www.forgedweb.com/untitled5.jpg

Re:A few questions about a 20g (I've searched!)
 

well it sounds like you have there a "hybrid" 18g or 20g... a true 20g has a TD06H/TD06S turbine wheel, but since you said "its a stock 16g exhuast housing" it's using a TDO5H turbine wheel. This will give better spooling characteristics. The 20g compressor wheel is capable of 40lb/min or roughly 400hp ;D while staying in it's efficiency range, which in in the range of 15-20psi. i don't know how it would spool on a b16 but my guess is full boost at 4000rpm ish.

hth
phil

Re:A few questions about a 20g (I've searched!)
 

Sounds perfect! What size IC piping should I use with it? I was thinking 2.25'' and a 2.5'' downpipe to 3'' exhaust for 240whp.

Thanks again :)

Re:A few questions about a 20g (I've searched!)
 

IMO it will definitely feel fast. You should have no problem running 12's in the 1/4 with slicks. I have a d16a6 with an evo III big 16g. It pulls hard at 8psi. You will be using a better engine with a bigger turbo. It will be fast and you should make the power you are looking for. Hope this was helpful.

Re:A few questions about a 20g (I've searched!)
 

Yep very much so :) Thank you a bunch guys..

Still have to decide if I should get the stage 2 clutchnet or spring for the stage3, and what size intercooler piping I want.

Re:A few questions about a 20g (I've searched!)
 

sorry to jack your thread...

but i just have to know...what's the boost response like? i've thought of doing this also, with built bottom end and such. please elighten me!

Ben

Re:A few questions about a 20g (I've searched!)
 

Go for the stage 3 clutch and either piping will be fine, infact you probably won't even feel a difference between the 2.

Re:A few questions about a 20g (I've searched!)
 

Stage 2 they said is good for 350hp, and its a $100 difference, so I am not too sure. I will probably see if I can get them to meet me in the middle on the deal.

Re:A few questions about a 20g (I've searched!)
 

What oil feed/return lines would I want ot run for this then?

Re:A few questions about a 20g (I've searched!)
 

Added pics! Tell me what you think

Re:A few questions about a 20g (I've searched!)
 

Nice.. I need to rebuild my 20g. I love the top end on those turbos.

Re:A few questions about a 20g (I've searched!)
 

I think that turbo is way to small for a b16.It will make boost instantly and will run out of steam quickly.Yeah its capable of over 400hp but thats on a lower reving engine.Those Mitsu. turbos all come off of vehicles with low redlines wich meens that HP/TQ needs to be made quickly.

Remember guys.Its not about how much PSI a turbo is capable of making.Its how much CFM it can deliver.Yeah it has a bigger compressor wheel,and compressor housing but with a really small turbine housing it will spool up verry,verry fast.

On a b16 I would go with a .60/.63 or a t3/t4.

Re:A few questions about a 20g (I've searched!)
 

I don't think it will spool instantly. Does a b16 put out that much exhaust volume at low rpms? Correct me if I'm wrong, but I would think that a 2L 4g63 would flow better in low rpms when the turbo would be spooling with 400 cc bigger displacement. In response to his first post. He just wants it to feel fast and make full boost by 4800 rpm. Also looking for less than 250 hp. I know that the compressor is plenty for his goals. I think it will be fine.

Re:A few questions about a 20g (I've searched!)
 

Yea b16's make kind of junky power down low, you have to rev the ---- out of 'em to make any horse. I am not worried about it spooling TOO fast.

Look at the clipping of the snail, though. Look ok?

Re:A few questions about a 20g (I've searched!)
 

That turbo is roughly the same size as a t25.Bambooseven is the only person I have met(in person) with a D16y8 that is running a t25.Its at full boost at about 2k rpm.Now keep in mind that its on a "D" series 1.6.

You are comparing 2 diferent engines that make hp/tq at diferent rpms.All factory turbo engines make there torque verry early and horsepower near redline.That comparisen is irelevent when choosing a turbo for an originally natural aspirated B16.That would be like comparing the VW 1.8t to the Honda 1.8.Yes they are the same displacement but their eficiency is way diferent.

That turbo will work on a B series.And you will make the HP your looking for if tuned right.But my point is that it will spool up fast and die quick.

Good luck :-\

Re:A few questions about a 20g (I've searched!)
 

There is no way that this snail is like a t25. I used to have a t25 on my boosted accord, and it was much smaller than that. A 16g, I beleive, is bigger than a t25, and the intake housing is even larger.

Re:A few questions about a 20g (I've searched!)
 

I belive your wrong.
https://www.homemadeturbo.com/tech_p...ech/index.html
And its not the compressor(what you call intake housing) that makes it spool fast its the turbine housing(exhaust side).

Re:A few questions about a 20g (I've searched!)
 

how is he wrong? a 16g is bigger than a dsm t25, even though it is still not a very big turbo imo

Re:A few questions about a 20g (I've searched!)
 

a 14b is bigger than a t25. a 14b flows 405 cfm, small 16g flows 505 cfm, a big 16g flows 550 cfm, a 20g flows 650 cfm. It is way bigger than a t25. I don't know where you are getting your info. ::)

Re:A few questions about a 20g (I've searched!)
 

I meant he was wrong in the sense that they pretty much use the same exhaust housing.The down pipe is diferent and yes the t25 compressor housing is smaller.
https://cherrypicker.tripod.com/site...6-2835side.jpg
In this psict you can see the diff. between a 20g and a t3 exhaust housing.This has been my point all along.In my undesrstanding of turbos is that the exhaust housing size dictates how fast the turbo will spool.Not the compressor.

Your free to do ass you please but Im just trying to tell you the turbo your choosing is too small.

Re:A few questions about a 20g (I've searched!)
 

It does look extremely small in that picture. I am going to ask him for pictures for reference.

I found this:

http://www.rtec.ch/pictures/t_comp1.jpg
"Comparison of the 13g to the GT368s (20g size)" that snail looks pretty large..

Re:A few questions about a 20g (I've searched!)
 

Re:A few questions about a 20g (I've searched!)
 

Yep I just saw that, too. I am re-reading how to read those things, its been so long.

a 20g is larger than an 18g is it not? And greddy uses 18g's on their bseries kits, do they not?

Re:A few questions about a 20g (I've searched!)
 

yes, a 20g is larger than a 18g, and yes greddy does use 18g on the b series kit

Re:A few questions about a 20g (I've searched!)
 

Yea, so what is with all this worry?

Re:A few questions about a 20g (I've searched!)
 

the greddy 18g is not the same as a regular mitsu turbo as far as i know

Re:A few questions about a 20g (I've searched!)
 

That turbo will be a fairly good match to a b16. It deffinelty will spool fairly quick and will let you easily hit your goals with plenty of room to spare.

Re:A few questions about a 20g (I've searched!)
 

I don't know what the worries are about. I don't know why someone would tell you it is too small. You are not looking for 400 horsepower or alot of turbo lag. You want full boost by 4800 rpm and since it has that 16g turbine housing it should spool well before that and you will definitely reach your goals like I said earlier. Good Luck

Re:A few questions about a 20g (I've searched!)
 

Re:A few questions about a 20g (I've searched!)
 

well I am not to sure on hondas cause I am new to them, but I did have a 91 awd talon with a 20g and it didnt spool fast at all on the 2.0L, it did hit full boost by 4900 rpm but thats not fast, as for the t25 being alomst the same size the 20g is almost 2x the size there are several local dsm's here going 11's full weight on them that will never happen with a t25!!! with ur set up I would worry about the 450 cc's again I am new to honda's but at 12psi on my dsm with the 450cc it was very very lean!!!

Re:A few questions about a 20g (I've searched!)
 

Thats seems like some good info. I was thinking about the same. I used to be into dsm's before i got my honda's. The 20g he is looking at has a 16g turbine housing though. I don't know the difference between the turbine housings of an original 20g vs. 16g

Re:A few questions about a 20g (I've searched!)
 

the 16g housing will make spool a little better but not all that much!

Re:A few questions about a 20g (I've searched!)
 

Thats the thing.Its not a true 20g.Its a 16g turbine with a 20g compressor housing.Thats not a 20g.

The 450s are fine on that car.they will be running at about 60% or so,so their will still be room to hit 300hp if he builds the engine.people here have been using those things for a long time with no problems.

Re:A few questions about a 20g (I've searched!)
 

from what i understand, the greddy 18g is smaller than an actual mitsu 18g. so can i please have the cliff notes of this whole 20g on a b16 thing? as i am thinking of doing the same thing.
i know these turbos support mad power on dsm's, but what would be the max hp attainable? Spool time? (definitve answer or semi-educated guess) will it survive the upper rev range? (again, definitive answer or educated guess)

Thanks.

Re:A few questions about a 20g (I've searched!)
 

ttt for an answer.

Re:A few questions about a 20g (I've searched!)
 

I don't know if I am going to be picking up that snail, becuase of all of the chips on the compressor wheel..

Re:A few questions about a 20g (I've searched!)
 

4900 rpm?How much boost were u pushing?Ive seen fellow dsms full boost (25 lbs) by 3k rpm with 20g's.You shouldnt have done a 20g unless you got a good deal or had cams on the car already.