How many mm to shim wastegate?

[Alec]

So I have everything apart cause I'm changing plugs/wires and valve cover gaskets and thought might aswell shim the wastegate. I have various sized washers and was wondering how many mm to shim it. I don't want any more than 8 psi.

 

[GrimJack]

You're just going to have to put in a washer and try it. Depending on how weak your wastegate has gotten over the years, you may need anything from a very small washer to a rather large bunch of them.

 

[Alec]

You're just going to have to put in a washer and try it. Depending on how weak your wastegate has gotten over the years, you may need anything from a very small washer to a rather large bunch of them.

Well, right now I'm pushing around 6-7 psi on the factory boost gauge.

 

[GrimJack]

First, the factory boost gauge is about as accurate as a government sponsored census.

Just throw a couple extras in there, bolt it back together, and give it a go. You're probably going to have to mess with it a few times before you get it where you want it.

 

[Alec]

First, the factory boost gauge is about as accurate as a government sponsored census.

Just throw a couple extras in there, bolt it back together, and give it a go. You're probably going to have to mess with it a few times before you get it where you want it.

Well, I also have a POS aftermarket ebay boost gauge that isn't hooked up. I'm not going to shim it any more that 3mm. So I'm wondering if I should shim it 1mm, 2mm, or 3mm?

 

[HommerSimpson]

3mm ? its a crap shot...and not hard to change...

 

[hvyman]

you should just buy a mbc from dr.jones for 25$.

 

[ilovemysupra]

you should just buy a mbc from dr.jones for 25$.

this... and invest in an accurate boost gauge. its worth it

 

[supradjza80]

you should just buy a mbc from dr.jones for 25$.

^3...that or get an EBC. I did the shimming of the gate and definitely prefer an easily adjustable boost control method rather than the shims.

 

[nightrider760]

do 4 washers for about 11 to 12 psi but again an accurate boost gauge its needed

 

[Alec]

do 4 washers for about 11 to 12 psi but again an accurate boost gauge its needed

How many mm is that? Washers come in all different thicknesses.

 

[nightrider760]

just do regular washers from a hardware store and you will also have to but new bolts about a 1/4 inch longer than the stock ones.
To make it easier on you will have to glue them washers together with some super gule before installing them.

How many mm is that //// is like 1 mm with all the washers if you use the thin ones

 

[Alec]

just do regular washers from a hardware store and you will also have to but new bolts about a 1/4 inch longer than the stock ones.
To make it easier on you will have to glue them washers together with some super gule before installing them.

How many mm is that //// is like 1 mm with all the washers if you use the thin ones

I think you mean cm, not mm.