sundowner

anything too report mate?

i herd rumors you blew the doors of wrx the other night, both in a straight line and through the hills...

um....these rumors travel fast.....
 
 

I fitted up my new turbo last Friday, and went for a bit of a squirt over the weekend. Had some overboosting issues as I had a bit too much wastegate preload and was very very cold night,but car felt much quicker than before. As this is a street car it was very important to me that I retained the quick spool and midrange punch of the gt25, so in the search for more top end I only went slightly bigger to a gt28. Had a small window of opportunity yesterday so I took the car for a quick dyno session to tweak the tune to suit and after some fuel and timing adjustments ended up with 241kw on 17psi , this turbo spools the same and reaches full boost by 3000rpm(same as gt25), but from 3000 rpm its gains everywhere. This is exactly what I wanted as I am not a big fan of lag on the street. Very happy with this setup now, the best thing is if do end up wanting more there is still more headroom for running more boost .Been for a few little drives since and it puts a masive smile on my face
here is a dyno graph
 

 
This is the before and after turbo upgrade dyno graph 
 
  
   
 
Cheers
 
 
 
 
 

Top work mate!
 

love it...
cant wait to ride in it now

Nice work mate!

Thanks guys.
 

sundowner

love it...
cant wait to ride in it now

hey mate, didnt wait long.....
hows the old 'going to servo to get some milk'
any excuse will do
 
cheers

guessing your running a gt2860rs or a 2871r?
std t28 will struggle to make those numbers

Mish

guessing your running a gt2860rs or a 2871r?
std t28 will struggle to make those numbers

Hey Mish,
My old turbo is gt2560r. Gt2560r = T28bb, stock turbo on
all s14/15 Sr20s, although some were bush bearing they were identical in
All other aspects.best I got out of it was 200rwkw.

No not running disco or 2871, the new turbo is a custom unit but would
be closest to GTX2863r in terms of flow/specs.

Cheers

Hi. Firstly gota say the car looks great. Just wondering where your air intake is hiding? nose cone or wheel arch?

Cheers mate,
Yes the intake is lurking in the nose cone, protruding through the Lh side radiator support panel. I'll upload a pic tonight when I'm on my computer.

Cheers