IP with 11mm and shimmed gov..problems

[darrenjlobb]

I think im going to have a play with the gov shaft..see if it changes anything... screwing in increases pressure under load right?

[anto]

What is your thinking behind adjusting the governor shaft darren?

[darrenjlobb]

Well im thinking if i move it back a bit, it allows for more travel, and i also belive the little hole in it, acts as a return to bleed pressure, and i think ajusting it ajusts this?

[vanbcguy]

Try it and let us know what happens!!

[darrenjlobb]

Ok, right, as changing the gov shaft requires pump removal, i dont have time to do that until at least next weekend, but 2nite, i thought bugger it, and i knocked down the regulator a bit, when i say a bit, im talking almsot nothing, just hit it with a punch and hammer, must have moved a fraction of a mm, but oh my god!! its basically transformed my car.. the power is now there until 5k... and it hits full boost SO much ealier, so deffo better, still cant make it smoke on boost tho, so im sure theres still more to be had!

[anto]

Ive drilled a little hole in my bracket so i can adjust it and to be honest ive done it a few times and i cant notice any difference. Il try again and see what happens now ive the rest retty much how it should be.

[dts67]

Ok, right, as changing the gov shaft requires pump removal, i dont have time to do that until at least next weekend, but 2nite, i thought bugger it, and i knocked down the regulator a bit, when i say a bit, im talking almsot nothing, just hit it with a punch and hammer, must have moved a fraction of a mm, but oh my god!! its basically transformed my car.. the power is now there until 5k... and it hits full boost SO much ealier, so deffo better, still cant make it smoke on boost tho, so im sure theres still more to be had!

When I done that I got clatter at cruise! It looked about 3 1/4s of a mm. How much did you go?

[darrenjlobb]

Its funny cos it was fine yesterday.. but i have noticed a slight bit of clatter today, its fine when you accelerate... just wen cruising slight clatter... as long as its not doing harm im not to worried... it goes like fook!

[dts67]

Dont like clatter....maybe it could be taken out by retarding the static timing? Whats idle like?

[darrenjlobb]

Idle is fine, acceration is fine, its just wen u lift off, and just have VERY SLIGHT throttle at mid revs, just as the engines under bugger all load u get a bit of random clatter, not much though... think ill leave it for now, i did think about retarding the static timing a bit, but it dosnt bother me much as its not much, maybe you have gone further than me with it...

[Rabbit on Roids]

yea, its the timing. my last engine was so advanced it would ping every time you shifted and had some RPMs built up. sounded just like a wrist pin knocking, but it was just way too advanced. kinda sounds like the discription you gave.

[dts67]

Darren you said in another thread that your injectors break very high? How many bar does it take to break them?

[darrenjlobb]

I have no idea con... was just told that from the people who cleaned and tested them for me, i didnt ask them specifics...he just said alot higher than standards ...

[55eta]

the problem with noise at crusing speed could well be caused by the increased internal fule presure caused by ajusting IPR as the IPR is finley balanced with the over flow valve in stock pumps wich then in turn dictates the[ spring rate ]of the timeing advance spring,when the presure is increased internaly it causes the pumps , injection timeing to advance premerturly without the increase in rpm wich would normally be nessiary to obtain the increase in presure ,the way you could over come this problem is to increase the spring rate on the advance piston ?but beaware to mutch internal pressure can cause a inbalance in presure with the delivery valves wich in turn could lead to cavertaion in the HP lines posible fix 4 that could be to use TDI delivery valevs ?

[anto]

55eta unfortunately the delivery valves from the transits are shorter than those of a 306 so physically it would not work.

So you reckon if we have increased the internal pressure we need to increase the spring rate of the advance piston to stop it advancing too early?

What is cavatation exactly?