WG Rod Length

Aeroking

Aeroking

e.i.
On a stock turbo... If you lengthen the actuator rod all the way out (least boost). Is the wastegate closed under no boost??

I noticed that with the rod shortened (more boost). The more i shorten the rod, the quicker it spools.

So my question is, with the WG rod set to 14~15psi, is the WG closed with pressure holding it shut, or is it slightly open (causing a slower spool) ??
 
91blazins10

91blazins10

Active member
Re: WG Rod Length

The wastegate rod is connected to the wastegate lever. The lever has a pin, the rod slips on to it, and a retaining clip through the wastegate lever holds the arm/lever together. If you pull the pin, and slip the rod off the lever, the hole on the arm and the lever's pin should overlap slightly. In the manual it states to look for 1/2 overlap, so you'd have to pull the arm out of the actuator slightly (tight spring tension here) to connect the arm to the lever's pin. I believe the overlap spec has been updated so factory specs are now 7/8 overlap (basically a looser/longer rod setup). The arm's length can be adjusted as the rod end is threaded onto the rod. Tightening the end will shorten the wastegate, loosening lengthens it. If the rod is shorter, the wastegate is clamped more tightly shut. If the rod is longer, the wastegate is held loosely shut. If the rod is shorter, the actuator requires more boost pressure to open the wastegate the same distance as if it were adjusted longer. Result - more boost, faster spool up, as the wastegate is not opening quite as much, and not as quickly. The opposite goes if you lengthen the rod.
 
Aeroking

Aeroking

e.i.
Re: WG Rod Length

my question being, is the WG shut at any WG rod length.

cause I'm trying to optimize spool with a manual valve,

but with the rod set to a low psi, and the valve set more max boost (coordinated together to where i get 15psi) it spools rather slow.

with the WG rod lengthened almost to full, and the valve set to minimum (coordinated together where i get 15psi) it spools incredibly quick, BUT boost control is more random.

So without spending a week of adjusting at every combo, i was wondering at what point i can set the WG rod, and the valve to where i get the good boost control and minimum spool time.

Is anyone running the manual valve on a stock turbo (can you share your setup).
 
JSM

JSM

Active member
Re: WG Rod Length

If you lengthen the rod to the point the flapper has to be held open to reach then sure it will affect spool.

The BARE minimum length I would set is with the flapper closed, the rod had to be stretched just barely to go on, beyond that it will be held open.

BTW: I HATE manual valves with a pasion.
 
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