as above and when u start getting boost, currently start around 2600 rpm full boost around 3100 rpm

 

Want to retype that so it makes some sort of sense? Theres no actual question in there...

 

ok

how do u set the boost on a T3 with a -31 actuator with preload only and when do u get full boost in your cars

 

At what point you get full boost depends on a lot of things, the size of the turbo being the largest factors.
Install the -31, connect up the control pipe to the -31 adjust the preload to achieve the desired boost and away you go...

i would start off with about 1mm preload, and see what boost you get.

I think the max preload you are supposed to run on a -31 is 3mm if memory serves me well

I get full boost about 3400 rpm under hard load
Cheers

Steve

 

at moment got 1 full hole of preload on actuatoer which gives me 16psi

 

That about 4mm preload, what sort of boost are you after

Steve

 

will be around 23psi eventually once larger injectors fitted and 3 bar map

 

you will end up having to use some kind of bleed system to achieve that kind of boost
as that is way more than the -31 can cope with on preload alone
i would set the preload to give you 12 psi boost and then use a 50/50 bleed to achieve 23 psi boost.


good luck

Cheers

Steve

 

dont start seeing boost till around 2400rpm, but when on boost it squatts the rears, it like getting a kick up the RS quite strongly and holds 17psi right to rev limter at 6500rpm

 

You could get a old foot pump, lob the end off where it attaches to the tyre & put the hose over the actuator nipple. Then pump the actuator to about 12-14psi & adjust the bar so it slips over the waste gate penny in the closed position ! job done

But anymore than that is stretching the -31 a bit & you might end up with boost creep in the higher gears or snappin the actuator bar or somethin LOL

Also check the boost in like 4th/5th gear when engine load is at it's most !

You could also lengthen the pipe from the compressor to the actuator & give it a little spike in the mid range !

Jb

 

jb fletch wicked idea, proper blue peter

 

Ballin,

Not what me mum said when i cut her "band new" halford foot pump up ! ! !

Got me own one now !

Jb