ok nearly finished fitting my .55 exhaust housing,re fitted my actuator but the pre-load is mega i.e the end of the rod is a few mm away from the wastegate rod had to get a foot pump to pull it over!!now this car has been live mapped,she is getting another live map next week,i think that is way to much preload would u back the actuator off until its at the half moon mark?or leave it alone and tell them when i get it mapped about the pre-load??

 

id wind it out a bit. half moon.best be safe than sorry,til it gets live mapped

 

cool fella anyone else

 

half moon is where they should be. when i got my car from paul was trying to hold 36 psi surge city

actuator was a whole hole past the arm so much to pull it off any pulling it about it broke both the mounting bolts of the actuator

personally i would put it to half moon

 

half a hole....see what its like ie. boost gauge if u have one.......but better still wait till next week and let the pro's sort it.................u going back to Grove..???.......

 

I would lower the amount of preload until you have it set up

Better to be safe than sorry.

Steve

 

put it back to half moon then tell your mapper about it even though before it gets mapped that should be one of there checks before mapping it

 

we run my actuator as tight as poss to try and bring the boost in a soon as pos.

 

when i had my old saph mapped at msd stu set it to about a whole hole of preload..

 

taking her to nms this time fella,just fancy giving them ago

 

 

You won't be disappointed

 

it arrived then???

thanks for letting me know




carl

 

just wondering how having the rod as tight as poss will bring the boost in any earlier.. ? i cant get my head round it.. i understand the tighter you go the more boost it will hold but cant see how it will spin up any sooner..
thanks..

 

it wont if the actuator is spec correctly, the wastegate sealing correctly, and a good boost controller is used.

 

it may just be a case of the new exhaust housing has the wastegate arm welded in a slightly different position, just back it off and wait till its mapped, obviously you wont be able to run any sort of boost with a different ex housing to map anyway.......

 

lol soz chap!yer it did get here,thanks very much for all your help etc very helpful chap is our carl cant recommend him enough

 

I'll second that... best thing i ever did to my old one!!!

 

i see that but surely as long as the wastegate is shut the turbo cant produce boost any earlier no mater how tightly closed the gate is as long as it dont leak.. i cant see how a boost controller can make a turbo produce boost any earlier than a closed wastegate.

 

Think its a case of putting as much pre load on as you can to stop wasegate creep when the boost starts to come in. Might not be as big a problem on smaller turbos but on something like Euans T4 when the boost build rapidly , having more force to keep the wastgate shut will help it build boost quicker.

 

your exactly right Neil...

cos my car is tuned on a rolling road I can observe what the waste gate does as the boost comes in...

We set mine so the wastegate stays fully closed for as long as possible to help the mid range.