what RPM should you see boost?

[rtviper]

With the trans brake on at what RPM should the boost guage indicate you are building boost ? I have 76 q trim turbo with a 4500 stall convertor and at 3k RPM my boost guage does not move at all. The fuel pressure guage starts to climb a few pounds but no indication on the boost guage. I blew into the guage line and the guage started to climb. The boost guage is plummed into the vacume line that has the y in it at the drivers side of the motor.

 

[azgn]

I'd say about 4000 rpm for a 76Q....at 4500 you'll prolly have 20 lbs

 

[rtviper]

Thanks Does it matter that the stock wastegate is set at 20 lbs max? That is about as low as the rod can be adjusted to. I will use just 20 lbs for now to try to get the launch sorted out.

 

[azgn]

with that big a turbo, you prolly need a bleeder valve to hold the WG shut (particularly at that low boost)

with a bleeder/grainger the WG sees no pressure until boost reaches a set level....will definitely help your spoolup

 

[rtviper]

woody thanks. I have an innovative boost controller on order and will install that with a wastegate. Then I will eliminate the stock wastegate. Hopefully that will take care of that issue