boooost

[Adam fc]

hi,just wondering what would be the maximum boost level i can run with the following mods.

3 inch from tub back
blitz dump valve
fuel cut defender
blitz air filter
boost gauge

I assume its around the 1 bar area??

cheers

[dthebuk]

i remember being told it can be done. personally i wouldn\'t do it without a chipped ecu or something though.

Thinking about it, as long as your deff getting enough fuel it shouldnt be tooo bad

[dthebuk]

oh, also depends what you\'re doing with the car. If you\'ve got stock intercooling and cooling i wouldnt rag it about all the time on more than 0.9 bar as this is supposed to be where the stock intercooler starts becoming un efficient.

[m1tch]

You need a chipped ECU, the knightsports chipped ECU or simular are usually mapped to 0.9 bar, but thats the max the stock injectors can take, I have a knightsport ecu and my e-manage logged almost 90% duty cycle on the primaries at 0.8 bar...very very close to losing the engine

What boost controller are you running and what wastegate porting and bearings did you go for on the turbo?

[the hat]

im running the same as above but street ported with the fuel pressure raised and a fmic and 4 beat ecu at 0.9 bar and so far so good standard turbo tho which = fail

[m1tch]

im running the same as above but street ported with the fuel pressure raised and a fmic and 4 beat ecu at 0.9 bar and so far so good standard turbo tho which = fail

The stock turbo seems to me matched to run out of puff where the stock fueling runs out, which makes sense really.

You can do what prof has done and bolt a bigger compressor housing onto the front, keeping the stock hotside

[Prof]

Stock intercooler will also be a problem over 0.7 bar which is where the stock turbo starts to get inefficient. Whilst both will run higher boost, the stock turbo life will be reduced as a result, and for both the intake charge temperatures are going to be high.
 
Higher charge temps means much less headroom against detonation.
 
Also, over 0.7 bar you must have some additional fuelling control - the stock ecu will just not do that with an FCD. Ironically it has tables for higher boost but the boost cut feature will never let it get there. I wouldn\'t trust the timing at higher boost either - even with aftermarket fuelling - if you don\'t run a chipped ECU, piggy back or standalone, you timing will be too advanced at the higher boost - and that again means detonation.
 
I\'d hate for you guys to learn the hard way....

[the hat]

ill just wait as there is plenty powers for doing skids just noe and will prob just get injectors turbo manifold etc all at the same time

[Adam fc]

My turbo as far as i know is completely standard,
i knew that things are going to get exspensive near the 1 bar mark,so for me to run anything near 1bar,im looking at-

fuel pump
fuel pressure regualtor
injectors
chipped ecu
boost controller
fmic
bigger rad

Allso is it possible to run a mild port/street port on standard injectors and fueling??

[Prof]

My turbo as far as i know is completely standard,
i knew that things are going to get exspensive near the 1 bar mark,so for me to run anything near 1bar,im looking at-
 
fuel pump
fuel pressure regualtor
injectors
chipped ecu
boost controller
fmic
bigger rad
 
Allso is it possible to run a mild port/street port on standard injectors and fueling??

Yes you can - mild porting will be street porting.  Might just give you a bit of an edge.  With the porting - you can trim as much material as you want upto a point - and the more you port it the more rough the idle will become.  The stock/chipped ECU will handle mild street port ok.

[Adam fc]

Cool thats what im looking at for next year,i was quoted £1800 for a port and rebuild.
 
As for the boost issue im going to buy a mechanical one for the time being and wind her down to around 0.7 to make sure she lasts till next year.

[Adam fc]

Bit of an update/bump ive recently put the waste gate arm back on the wastegate flapper enabaling the boost to reach 0.9 bar!

As a result ive taking the FCD out to stop any over boosting issues.She now safetly boosts to 0.5 bar.

I have a mechanical boost controller which i havent fitted yet and im wondering with the FCD out of the system could i some how wind the boost up with the controller to around 0.7 bar??

Or is there a way to wind the boost down from 0.9 bar with the FCD fitted??

[L18M]

Cool thats what im looking at for next year,i was quoted £1800 for a port and rebuild.
 
As for the boost issue im going to buy a mechanical one for the time being and wind her down to around 0.7 to make sure she lasts till next year.

£1800 port and rebuild! thats cheap!
i\'d assume its reusing the current housing and end plates, intermediate plate and new tips and side seals?
you might need to factor in a few hundred for some decent (used) housing depending what condition yours are in.

[Adam fc]

They have some refurbed housings in stock which they use with there rebuilds.The rebuild includes new pumps seals all round and im thinking of getting some unbreakable tips too.

[Prof]

Bit of an update/bump ive recently put the waste gate arm back on the wastegate flapper enabaling the boost to reach 0.9 bar!
 
As a result ive taking the FCD out to stop any over boosting issues.She now safetly boosts to 0.5 bar.
 
I have a mechanical boost controller which i havent fitted yet and im wondering with the FCD out of the system could i some how wind the boost up with the controller to around 0.7 bar??
 
Or is there a way to wind the boost down from 0.9 bar with the FCD fitted??

The FCD won\'t regulate boost - so you should be able to set the boost with your manual boost controller.
 
All the FCD does is to lie to the ECU about the boost level, clamping it at 0.6 BAR (just before the fuel cut point) and therefore allows you to run higher boost without fuel cut.  The problem with this is that the ECU won\'t be providing any extra fuel after that point - so the car will run increasingly leaner as the boost increases.  You could go for small increases of boost above stock - but weigh up the risk.
 
The only real answer to running higher boost is some means of providing the extra fuel required, and eliminating the fuel cut - that means either a chipped ecu, piggy back fuel controller or full standalone.