Joe91

Just fitted a new turbo to my car, before it was setup to run 14psi on low boost and 22psi on high boost,

It's running 0.6bar on low and 1bar on high at the moment, how much psi is 1 turn roughly just so I'm not guessing wildly at it.

Thanks, Joe

stephenbatey

iTrader: (1)

Tick, tick, boom

Seriously mate get it set up again, the guy in your sig knows what he's doing

James @ M Developments.

iTrader: (2)

Very hard to say as it depends totally on the spring rate of the actuator,
As a rule of thumb there should be a minimum if 2mm and a maximum of 4mm of preload on the actuator arm, the rest is done by the boost control system.

Obviously the fuelling etc needs to be checked while playing with boost or fatal engine damage may occur

Rsmat

iTrader: (2)

All I know is one turn is not enough

James @ M Developments.

iTrader: (2)

You don't need a waste gate Matt lol, the fucker is flat out everywhere anyway lol

B18PWR

Joe have you messed with the Amal valve jets ? Also you would be better using your original actuator with the pre load discussed . Test it on low boost till u get your 14psi back .

Rsmat

iTrader: (2)

Cap the air injectors off and run flat out

James @ M Developments.

iTrader: (2)

I used to pull the pipe of my actuator, made a little more peak boost but not much different at all lol

costina

iTrader: (1)

Thats not the kind of thing u should be telling people James

Rsmat

iTrader: (2)

I once did that years ago on canklow meadows road I was looking under bonnet for a rattle and a lad in a Astra GSI turbo pulled up said he wanted a race so I reached down with my right arm with a cheeky smile on my face and pull the pipe off... Oh she went like fuck and left the Astra dead

Glenn_

iTrader: (1)

What car did you have at the time?

Joe91

I havnt touched anything, i spoke to oli on the phone and he said make sure it has half hole of preload which i did but im usinng the same actuator off my old turbo so nothing had changed apart from i had to wind it out a fair few threads until i had my half a hole..i was thinking just wind it until i find my 14psi again like you said.

Joe

James @ M Developments.

iTrader: (2)

It was mapped flat out anyway, it really made very little difference

I think I didn't word it very well, I never used to run it like it, but we did some testing to see just how flat out the turbo was, and yup it was flat out lol, fuelling was bang on with the pipe off

You get to a point on them where the exhaust pressures will push the gate open, and I was doing some testing o see when, where and what difference actuator springs made, and line locking etc, was interesting stuff I got bored on a Sunday

botters

iTrader: (2)

i pulled the actuator vac pipe off on my mates renault 5 before i went for a spin in it, didnt end well lol

costina

iTrader: (1)

I was only joking lol i guess that was on ya T34/48? if so can u remember what u was peaking at and holding? ive that map

Rsmat

iTrader: (2)

Rs turbo ..