hi,
what size of jets in amal valve for msd 380bhp+ chip,55lb siemen injectors?
have managed to spike 32psi but tails down to about 25 psi,
hoping for held pressure to be closer to 30 psi,

just had turbo rebuilt and new actuator -31 with 1/2 hole preload,was way more preload before,but hoped to jet amal valve to suit properly this time,

have pressure tested intake to 32 psi and found no leaks other than amal valve lid sealed that up,

cheeRS colin

 

You will struggle to hold that much on a T34 as the engine uses all the air the baby compressor can pump, so the boost naturally tails off at high rpm.

I would use one full hole of pre load

 

would you not need a -34 act?

 

Not normally, some do need a -34 to reach 32lb peak, but not many usually the .48 which has more exhaust pressure

 

That's why my.48 has one then. spent a lot of time messing with jets think mine peaks at 32 ish and tails off to 26 afr still in the low 11's plenty quick enough with all that torque.

 

Just had a look at mine

only have a 2.5mm in the C port

 

Normally on the flat out maps you can remove the port r jet,

 

Just had my t34.63 off to CR Turbos, who replaced quite a few parts, and put on a -34 actuator, was their recommendation.

 

Mines on a -31, so was my saff, both were doing over 35lb peak, not many need the -34, and tbh the strong spring can bend the gate arm when they get very hot which is why I always try to use the -31 where possible.

 

Bloody hell 35lb peak best I get another clutch then lol you prob have more torque than mine as wasn't you on a 4x4 exh manifold?

 

They've just put new wastegate and arm on so if it does it'll go back to them

 

Yeah my saff was on the .48 and did 420lb/ft, the escort is on the .63

 

Thought so ive the same map as you had in the saff im using the 2wd manifold so slightly more power less torque be nice to see 380/380

 

thanks for replies,
its a .48 exhaust housing,

cr turbos did my turbo and put new -31 actuator,that be ok?

what size jet in what port with 1 hole preload?

cheeRS

 

It's dependant on the car really, they need setting up as required.

I would start with a std jet in "c" and no jet at all in "r" to allow full bleed.

You must monitor afr and for det though.

 

that great cheers,
been with this set up for few years now but always thought I had to much preload on actuator so with rebuilt turbo thought id try jetting amal propery,

will have a tinker tomorrow hopefully,

thanks again

 

James I bought your chip off your saph.... im running t34.55 and 55s... when I come to msd next year to get it all set up when the cars back together im guesing mines going to run some where near the 420lb that you had ? What bhp did you get ?

 

Instead of drilling the jets and trying to find the right size I have removed the jets and put an adjustable flow control thingy in line on the C and R ports. I found some small metal flow control thingys for fish tanks.
In this way its very easy to adjust it when on a test drive, until you have found the right setting. Just make sure that they can't move once set.

 

The saff did 370bhp.

 

Nice id be happy with that... lets hope it will last a session at msd next year..

 

1 hole of pre load on actuator and 2mm jet in port c,
spikes 32 psi then drops to about 28 then eventually tails off,

with 2.5mm jet in c port it spiked 25 psi,

cheeRS colin

 

What about a t3 on greens James , just a general starting set point ??

 

Just set your pre load and increase the Port R untill you desired boost is reached.