md321t on 2ltr laggy!!!!
 

Got the above turbo on my 05 sti and it's too laggy for me would it help if I got it billeted at lateral??? What else can I do???
Thanks

What manifold and up pipe are you running?

.gt spec headers and Harvey smith uppipe

Do you have a graph? When do you hit full boost in 4th gear?

I do mate what's your email???

Sent ;-)

Graph, the curves do not look very smooth have you spoken to the mapper?

http://i258.photobucket.com/albums/h...704_195005.jpg

what the hell is happening at 4500 rpm?

Not got a clue ain't this normal???

No I haven't mate but he didn't mention anything

Defo not there is a dip in power, at 4.5k the turbo should be pulling hard

This is my old car similar spec to yours but with a gt spec manifold and power fc ecu

http://i258.photobucket.com/albums/h...ctualgraph.jpg

I owned a similar car fella, yours is less laggy as mine spooled up between 4-5k, still went like a monster though.

TX.

Edit - old thread with my graphs attached:

https://www.scoobynet.com/general-te...-emotions.html

What could it be then

Shall I get the turbo serviced and billeted ???

Post up the full spec fella.

TX.

i think you need to speak to your mapper as they should be able to spot or identify this, suprised they didnt mention anything about it at the time?

id suggest getting that looked at first before changing turbo etc

+1 :thumb:

Me too.

Did you tell harvey what turbo etc when you bought the up-pipe/headers?

Yeah told him mate,,,
321t
Fmic
650 injectors
290
Fuel pump
Ks tech mega maf induction
Full 3" exhaust from turbo.
.gt spec headers Harvey smith uppipe all wrapped
Think that's it

my Graphs have that spike, albeit at 3500rpm,321H/2.5, this at RCM on both maps Vpower and 20%meth, I'm certainly not worrying about it as it's not a boost spike.
Trev

its not a boost spike but something up, maybe plugs or something to do with fuelling etc? i would imagine you can notice it in the car when accelerating though as a hesitation or pulling back?

Not really just laggy

I've got a billet md321s to fit should be fun!!

So I need mine checking out then?

Sure one of the big name genius mappers will be able to give an opinion.

But it will always have lag. as the T was designed to run with a 2.2 or 2.35 etc not 2 litre engine

So if I get it billeted it will be better? But surely that doesn't explain that spike ??

The newer DD software seems to do that a lot, seen it on Evos too.
It makes it look like there's a problem, where there actually isn't.

So it's prob nothing? I'm questioning the mappers skills as he's very respectable and I trust him with my car. But like I say just want help making it spool up faster etc

Not questioning it should say ^^^^^ :-)

First thought was a big crack of det making the ECU pull timing/boost but it does look a bit extreme for that?

JohnD

PS You get exactly the same curve on a tensile test on low/med. carbon steel!:rolleyes: