sti-chris

Evening guys.

Got an STi 03 , Remap , Zorst , Walbro K+N pannel , Apexi AVCR , im currently at 340 bhp. and its very good.

My car runs the VF35 and i have been told its runing out of puff if i want more oomphh. which i do !!

I heard someone say methonol to me ?

What can i do to get to 380 ish BHP , i think in time i would like to do a 2.5 conversion and an MDT31T however this is going to be a costy move.

Whats my best bang from buck to get from my current level to nearer 400BHP.

Regards in advance.

Semper

Turbo. I wouldn't even bother going to the MD321T. The 20G is good for 400ish and cheaper!

sti-chris

Hi Semper , you think just replace my turbo for a 20G , is that basicly it ?
well i know i would need it maped again , but 20G and map = 380
What boost would i expect to run?

Regards

Chris.

bighead

iTrader: (1)

get the md321H , much better than the 20g

RA Dunk

most struggle to make near 400 with a 20g without fuel additives

Semper

At least quantify with some figures/evidence...beer is much better than the 20g!


Disagree. Mine is fine! No additives!

mshill

iTrader: (4)

with an AFP 20g turbo, 3" full decat, gruppe s headers and up pipe, inner wing k&n induction cone, fpr, avcr boost control, standard top mount intercooler.
mines runs around 380 BHP / 365lb torque on v power @1.5 bar boost
with 10% methanol and some NF it achieved 405BHP / 370lb torque @ 1.7 bar

did feel quicker mapped on additives but changed back to v power after a short time as could not be fecked with puting the additives in every time.

321 H is a better turbo but comes at a bigger cost, it is down to your performance requirements and size of your wallet

bigarf

iTrader: (67)

this was my spec when i was at 383 bhp,uprated fuel pump,full decat 3in exhaust,heat wrapped tubular headers and up pipe,k+n typhoon,md321h turbo,hyperflow top mount intercooler,and mapped, the 321h is a very good turbo spools up quick and holds it right to the redline.

C. J.

iTrader: (2)

Have over 400 with a 20g running on vpower & no additives
running 1.4 bar & a standard WRX block
spec is in My scooby

banny sti

iTrader: (68)

Here is how you make 400bhp plus:

Forged 2 litre Semi Closed Deck Bock with Omega RCM 92.5mm pistons, Carillo Rods, ACL Race Bearings and a V9 cross drilled crank
1.3mm head gaskets
RCM Oil pump
11mm ARP head studs
GT30 hybrid turbo with 3" inlet
3" inlet hose
Gruppe S V2 wrapped manifold and up-pipe
3" Wrapped Open Neck Downpipe
Blitz Nur Spec R middle and back box
Autobahn 88 FMIC
740cc Nismo Injectors
Fuel Lab FPR
Walbro 255 fuel pump
Inlet manifold spacers
Header tank spacers
K&N Induction Cone
Carbon Heat shield
Cold Air Feed from foglight induction cover



Banny

RA Dunk

i said MOST, i need methanol and octane booster to make it on my 20G

Neil..

iTrader: (35)

If at a later date you are wanting to go 2.5, then I would either....

1. Wait until then.
2. Get an MD321T on it now, ready for the 2.5.
That way you are only buying one turbo, and it won't be that bad as far as lag is concerned, contrary to popular opinion.

JohnD

iTrader: (5)

When I looked at that lot I reckoned you should be looking at nearer 500 than 400 then I checked the power graph - that's a nice curve!
My 03 STi has MD321H, 650injectors, Ported/wrapped headers/up-pipe, Hyperflow CAI, 3" catted Milltek, AVC-R and mapped at Zen. No rolling road figs. yet. It's certainly more laggy than with the VF35, but when it wakes up - it goes!
It was easy to go from PPP to 340 - just a re-map, but from then on it means hardware - and much wonga!

JohnD

Semper

Before I bought my 20G, I'd already made my mind up that I didn't intend going over 400. The power vs cost just isn't worth it FOR ME!

Too many other upgrades "needed" for 400+.

Barnesy

Check my profile.