wastegate Y orfice

[Lee Thompson]

Anyone know the size of the orfice in the wastegate Y?

 

[49-blues]

I think the gns are .035" and the ta s are .050",i have a couple if you need one. johns performance sells them.

 

[Lee Thompson]

49

Thanks for the reply--thought I would need to buy one but found one in my junk. Next ? --standing @ the pass fender--looking @ the solenoid--wires are toward the front of car and hose connections are pointed toward firewall--which port does the hose for the wastegate go to--top or bottom. Thanks

 

[Lee_Burough]

I hooked mine to the port closer to the up pipe, but I don't think it matters....When wastegate solenoid is open, its open to the atmosphere regardless of which port you use.

Look HERE for a picture and explanation of the vacuum venting. I thought the TTA had the smaller vent....???

I'd recommend a manual boost controller anyway....

 

[yullose]

I'd recommend a manual boost controller anyway....

Ditto that.
I put the RJC manual controller on mine and love it.

 

[UNGN]

I think the gns are .035" and the ta s are .050",i have a couple if you need one. johns performance sells them.

Actually, it is opposite this.

The GN's should be around .050" and the TTA around .035".

The smaller the orifice, the higher the max boost at a given wastegate setting.

 

[Lee Thompson]

Thanks to all who replied

I got it working !!!

 

[6=8]

It's cool when it works again, huh? I messed up early on and put a reg open y fitting on durign a vac line replacement effort, at a time when I also had a leaky set of headers (and had trouble seeing 10 PSI.) When I finally replaced the headers, I had a wicked overboost problem... Until I wised up! Did a search on the problem, and found johns performance!