Reducing lag

[Spud_G40]

Id go for SEM inlet and 80mm throttle body. Nice and simple bolt on. and get map adjusted.

Would this reduce lag?

 

[caveo]

No , like said before , more space to fill by the turbo = a little more lag but it will flow better top end.

 

[nogutsnoglory]

depends on what you want from your power delivery... if all you want is low to mid range then k03s, and a similar powerband to a diesel.. buy a diesel then.

If you want a more linear power delivery, as k03s are all at once uber spooling things, then the bigger units will roll in later and more progressively and rip the more you rev the motor.. using the whole rpm range.

not everyone wants this tho.

twin turbos', K03s to get things going and BT from 4k up.. but compex plumbing

Yes I remember you saying about the twin turbo setup when we popped round to see you, would be awesome but sounds costly, was thinking about a small SC to get things going but again probably complex and costly.

The turbo website says mine is rated up to 475 bhp or is that different trim?

Bill how long do you think it would take to adjust the map and poss set up the apexi properly?

 

[ibizacupra]

couple of hours approx of driving logging, adjusting, logging etc etc
not a chance the gt2871 will flow that much bhp.

 

[Backdraft]

There are reports of a 2871 flowing to 495bhp. You could help reduce lag with a head rework.

 

[ibizacupra]

There are reports of a 2871 flowing to 495bhp. You could help reduce lag with a head rework.

yes, and explain how that spec can flow that power please

cos it cant in flow terms

 

[Backdraft]

It was an .84 turbo. The info was from Jp. Garretts figures are quite conservative.

 

[ibizacupra]

It was an .84 turbo. The info was from Jp. Garretts figures are quite conservative.

0.84 housing, but that turbine is not that big...
would make my GT35 700bhp then, in my dreams

 

[barnsley]

0.84 housing, but that turbine is not that big...
would make my GT35 700bhp then, in my dreams

in a wet one

 

[Backdraft]

I surprised if a 2871 could flow that. I would like to see the dyno plot for it.

 

[ibizacupra]

I surprised if a 2871 could flow that. I would like to see the dyno plot for it.

I could sketch one up..

 

[ryan_s3]

lol 2871 at 500bhp! not without race fuel + nos
Even a gt3071r [email protected] full race spec just made 518bhp and 525ft/lb and peak power was at 5000-5300rpm on 98 fuel thats how much it was raped to make the 500bhp!
As for the original poster ,bill described what is know as lean spool which helps a bit but as stated the only proper way of sorting it is capacity or fit a smaller turbo!
I know a ihi on a 1.8t spools up at the same rate as a gt3076 or gt35 on a 2l evo engine!
My friend made 550hp on his gt35 at the weekend and it was fairly responsive low down.

 

[nogutsnoglory]

mine is running 360bhp at 1.4 bar, what safe levels could it go to?

I am really more interested in it being more driveable rather than chasing higher numbers though
I think

 

[ibizacupra]

plot does'nt mean much vs what real road is like.
wideband logging and seeing whats physically possible from the turbo in terms of spool and its fueling not bogging it down, and ign timing available etc..

 

[ryan_s3]

get it down to bill and let him have a look,torque is probably more critical than power on standard internals.God i'm starting to sound like bill's PR man!

 

[nogutsnoglory]

Yeah i have family/friends in the area so Bill is a stones throw away,

I'll be that way in the new year, need new tyres first though........lol

So is that really it then?
What sort of prices is a 1.9 rebuild

 

[h17och]

buy my bottom end and sell yours on

HoocH

 

[nogutsnoglory]

labour intensive tho isnt it?
seems a shame mines had all the internals done already lol

 

[h17och]

whats worse. rippin your apart and selling second hand pistons that no one wants which involves engine out.

or

stright swap engine and a full built engine to sell ...?

 

[nogutsnoglory]

I know what your sayin mate, it makes perfect sense
my original question was based on not having to go 1.9 due to the expense and seeing what the other option were, but PM me and i'll defo keep the idea in mind