whats your boost @ rpm

T

tombola

Guest
bit of a poll im after really
mine boosts as follows @ 2500 rpm 1 psi
@ 3000 rpm 3 psi
@ 3500 rpm 6 psi
@ 4000 rpm 10.6 psi full boost


just wanting to hear from owners with standard boost ,top mount cooler, and decat thats the state of tune of mine so iwant to compare ,

im thinking mines a bit laggy for standard ,had it rolling roaded
to see if anything stood out but it made 240 bhp @ 6700 rpm
and 200 lbft @ 4400 rpm ? which i think is high they said its normal

thing is b4 my debt sensor fault, now replaced and de catting it and adjusting tickover im sure it used to ping to 10 psi @ 2600 but only did this when det sensor wasnt putting it in safe mode
any help muchly apprciated as drivabilty gone out the window
with a laggy turbo
 
M

MarkTurbo

Well-Known Member
What gear were you in :?:

I was running standard boost and mine used to hit full boost by about 3000rpm in 5th gear :wink: That was with just an air filter and mongoose exhaust.

Is the det sensor still cutting in then :?:
 
T

tombola

Guest
debt sensor is fixed engine fully serviced
the run on the rolling road was in fourth gear
it seems more laggy on the road in 1st 2nd though ?
 
Fast Guy

Fast Guy

Moderators
Staff member
Dunno mine, but if you want to compare notes, click on the 246 in my siggy for my power graph.
I know my boost is dropping off at higher rpm as can been seen from the torque curve.
Your max power is at slightly higer revs than normal, somewhere in the region of 62-6400rpm on standard cams.
 
T

tombola

Guest
any ideas then peeps , all ive done is replace det sensor
fit a decat , and lower tickover from 1500 rpm to 1000 rpm
by screwing the adjutser clockwise a few turns
ive tried it back with high tickover and its more or less the same
is there anything inside the tickover adjustment screw that could be
damaged due to turning to far ?

only other thing could the decat be causeing it to be laggy as turbos
start wiht the exhaust wheel , im thinking they like the back pressure
cos after i fitted it got really loud through the apexi ?

also would a boost controller sort this out if my actuator was playing up
 
A

Anonymous

Guest
tombola said:
only other thing could the decat be causeing it to be laggy as turbos
start wiht the exhaust wheel , im thinking they like the back pressure
cos after i fitted it got really loud through the apexi ?
Click to expand...
if you've just fitted a decat pipe,it should actually help the turbo spool up a bit quicker due to the reduced back pressure.turbo motors do not like back pressure.
 
C

caz

Guest
dont know if its any use but mine on the rollers made 230 bhp at 6406 rpm and 200 lb ft at 3500 running 0.6 bar
 
T

tombola

Guest
can anyone tell me that bodgy way get 1bar
you know the one where you loop pipes at the boost controller
ive tried a search but too much to sift through
and the stuff in the how to section is backwards

i just want to try it see if its still laggy
 
Fast Guy

Fast Guy

Moderators
Staff member
tombola said:
can anyone tell me that bodgy way get 1bar
you know the one where you loop pipes at the boost controller
ive tried a search but too much to sift through
and the stuff in the how to section is backwards

i just want to try it see if its still laggy
Click to expand...

I don't think it's too bodgy as it seems to work. You didn't look far as it was only posted again yesterday :p

jonesgti_r said:
easy free boost as hiteq do it... from the actuator to a T piece one side of the T piece goes to the large air intake pipe between the afm and the turbo and the other side of the T piece goes to the inlet manifold,,,, the boost solenoid you run a small piece of pipe from one side to the other.. the pipe that did atach to the manifold should have a small restrictor in it .. make sure you still use the restrictor or you will end up running less boost
Click to expand...
 
T

tombola

Guest
ive read this ten times and it doesnt make sense to me
its like a childs wrote it , read it , may as well be in japanese

or is just me being tick :shock:
 
Fast Guy

Fast Guy

Moderators
Staff member
If I'm understanding it right :- On the T piece by the wastegate actuator, remove the hose that goes to the boost solenoid and replace it with one that goes to the inlet between the turbo and AFM, on the boost solenoid, loop one piece of hose to join both connections together.
 
A

ard1ey

Guest
Bang on Fast Guy. 8)

Its not a bodge - all you are doing is putting in a fixed air bleed from the wastegate rather than going through the solenoid. Its like having a non-adjustable bleed valve, its just handy that the fixed bleed gives you 1 bar :D

The looped pipe you put on the solenoid is just to keep crap out AFAIK - there will never be any pressure there for it to regulate.
 
T

tombola

Guest
so in effect the 2 pipes coming off the controller can be joined togehter
and the boost controllers open ports can blanked or linked together
is this right
cheers guys
 
Fast Guy

Fast Guy

Moderators
Staff member
tombola said:
so in effect the 2 pipes coming off the controller can be joined togehter
and the boost controllers open ports can blanked or linked together
is this right
cheers guys
Click to expand...
The ones on the factory boost solenoid yes. Not the ones on any after market boost controller :wink:
 
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