Kennyboyd31

iTrader: (1)

Im looking at an upgrade for my52 WRX. Was thinking about a VF35 or VF43. Just looking at the TD05H-20g, what do you guys think ?
I want something that spools quickly and holds through the rev range.

craigyp

iTrader: (5)

I don't think the 20g will suit u then mate if your wanting fast spool

Kennyboyd31

iTrader: (1)

From my reading maybe the 18g will be better?

alcazar

iTrader: (2)

My HS TD05 20g spools quickly enough, due to a trick Harvey Smith up-pipe and ported headers.
Have a word with Harvey on here.

Kennyboyd31

iTrader: (1)

Sounds like a good idea , cheers

L.J.F

iTrader: (31)

As already posted, if you want a fast spooling and responsive turbo then the 20G is a no go, also it will be pushing your box and possibly engine to the limits powerwise. I would go for either the vf43 or vf35 as these are relatively cheap and easy to come by or there is also the 18g, sc36 etc but these are harder to come by and more expensive.

MattyB1983

iTrader: (51)

Everytime you see a 20G mentioned its always followed by how laggy it is.
I really can't understand where people are coming from. Im currently using a 20G and don't find it laggy at all. Yes I'm using meth now but even before it was far from laggy.
Before the 20 I had a VF28, which is a punchy quick spooling turbo as you know, added the 20G along with gt spec headers and up pipe and noticed no difference in spool.
Don't get me wrong, if your in 5th at 40mph and floor it then yes, takes a while to wake up but that's the same with any turbo.

Be interesting to know how many of those slating a 20G have actually lived with one.

Kennyboyd31

iTrader: (1)

Thanks for the advice

Kennyboyd31

iTrader: (1)

Hopefully we will get a good few replies and opinions.

L.J.F

iTrader: (31)

I used to have one on my old bug sti and found it to be lazy unless I dropped a cog but it was good once it had picked up pressure but it wasn't to my requirements so went for a vf48 with 20% meth which wasn't much better

Never tried the 20G on a meth mix though.....

craigyp

iTrader: (5)

I'm struggling to live with my md321t on my 2ltr so I'm getting it billeted. Don't know how they compare to a 20g

KAS35RSTI

iTrader: (73)

As above

All depends on what 20G, mapping & supporting mods. Some of them chinese copies are the ones that give all the 20G's a bad name

JdcTypeR

iTrader: (19)

I'll swap you my Harvey smith 20g for your T

99greenwagon

iTrader: (39)

i have a afp billet 20g in for sale section.

craigyp

iTrader: (5)

Erm???,,

JdcTypeR

iTrader: (19)

only joking mate

fez the plodder

I thought the 20g was better suited to the 2.5? but im no expert....ive got a vf43 a full decat,panel filter and a 225lph fuel pump... not sure if the injectors want doing if i go down the new turbo route????

Pramas

As a guide my HS 20g on a 2.5 without ported headers hits 1bar in 4th at 2900 revs which Harvey said was about spot on. Obviously on a 2.0 its going to be way later

peter zippy reid

iTrader: (25)

I have just fitted a afp 20g non billet on my 05sti and im at 1bar at 3800rpm so it is quite laggy

Shaks-STI

iTrader: (7)

Another 20g D/D here not a laggy turbo for me.

peter zippy reid

iTrader: (25)

Dont get me wrong once it spools its fine i got 396bhp 370ft/lb torque

scoobyken

Didn't make good power on my 20g n very laggy on my 2.0litre engine, so I upgraded to a billet sc42 from the clinic.. Now my car is making 1bar of boost at 3200rpm, full boost around 3600rpm! Waiting for 3bar map sensor to be put it to make more boost n power soon! wouldn't recommend a 20g unless it's billeted.

harvey

iTrader: (48)

A bit like comparing apples and oranges. They are both fruit.
You need to sort out your spooling issues, identify the problem area(s) and go forward from there.

There is something wrong there. I would expect spool on a 2 litre to 1 bar in 4th on level ground, 3,300-3,500 rpm latest.
I have one on a 2 litre at a consistent 3,140-3,160 rpm.

peter zippy reid

iTrader: (25)

andy f said its quite late coming on spool but once on its doing what it should what could be making it come on late harvey

MattyB1983

iTrader: (51)

Which manifold and up-pipe are you using ??

peter zippy reid

iTrader: (25)

Standard ported ones matt spec is
Td05/20g
650 injectors
Hrc pump
Aps innerwing induction
Full decat 3" system

ronjeramy

iTrader: (1)

How much boost are you running Peter and is that on a TMIC?

peter zippy reid

iTrader: (25)

1.5 and yes sti tmic

Henrik

iTrader: (5)

In contrast, I get 1 bar at 3100-3200rpm in 4th on my 2003 WRX with my AFP 20g on a fmic and lateral performance headers (i.e. without a "trick" up pipe).

When I first got it, I thought it was laggy compared to my old td04, but obviously it will be because it's so much bigger. Once I'd driven it for a while, I started to love it. It made decent figures too - 391bhp/392lbft on 10% e85 and 370'ish of both without.

My daily is a 2.1 wrx with an sc36, and in comparison that one spools only a bit later than the td04, but doesn't have the same kick, so it's not as much *fun*. If I had to pick either to keep, I'd keep the 2.0 with the 20g because it's more fun.

peter zippy reid

iTrader: (25)

Maybe i need fmic I am happy with the 20g