currently got my old -31 fitted to my new turbo at half moon pre load. so should limit to 7psi on spring pressure. fine for running in my engine and turbo. however once run in want to run a base pressure of about 14-15 then use my bleed valve to sneak the boost up as and when.

Apparently the -34 at half moon pre load opens waste gate at 14. would a -34 be more suitable for what i want instead of ringing the neck out of a -31?

 

Depends what boost controls you have plumbed into teh system?

 

hi stu was thinking of keeping things really simple and just using actuated and forge bleed valve. what made me think of the -34 is the -31 getting creep. the -34 with pipe from compressor to actuator to get base boost of 14 is surely better than fooling the -31 with x amount of leak off. then with higher boost i'd still leak off only a fraction of boost compared to what the -31 would have. if you see how I'm thinking.

cheers.

 

Your right, it works well if no amal valve and is indeed what I would use. But if Amal valve still installed then keep the -31.

 

no amal valve stu. its on megasquirt efi. so was looking at merely pipe from compressor to actuator with bleed valve to wind up from base boost of 14 when i feel like it. would that be an ok safe and simple way to go about it?

cheers.

 

Yes pal, will work just fine... however, for 15psi you wont even need a bleedvlave, you will be able to achieve that with about 4mm on the wastegate, depending on IC pressure drop.

 

thanks for clearing that up for me stu. big help.

 

This is one of those odd questions, but whats half moon pre load?

 

the pin on waste gate lever is half way over the hole in actuator rod creating a half moon effect. there's some pics somewhere on here on adjusting actuators.