over boosting

[nigel_a]

my gsrs' overboosting. ive got a 63 motor in it. 3'' exhaust from the dump and its a td05h. was runiing fine till i put the external gate on it. its a 38mm dpr one. hits 20psi and i havnt hit full throotle yet. tried 2 gauges and they do the same. have looked at other topics on here and they say port the turbo and gate. i had already ported my turbo when i put the gate on it. do i need a bigger gate?

cheers
nigel

 

[(2much)]

sounds like its not opening,, hence no psi relief.

do you know what spring you are supposed to have in the gate, maybe it's 1.5 or 2 bar (21-28psi)

i would check that you have the vac lines setup correctly, does the gate have dual ports for vac lines?

 

[brisvr4]

What spring is in the gate for starters?
Which port on the gate do you have the vac line hooked up to?

 

[GSRWRC]

Yeah make sure the Vac lines are setup properly.

Bottom port goes to a pre throttlebody pressure source, Ideally off the upper i/c pipe leading up to the throttlebody. Leave the top port open unless you have a boost controller of some sort.

 

[nigel_a]

it does open, its running to atmo atm. its got a 1 bar spring. it does have 2 ports and im currently using the lower one. i do have a controller and its connected to the ic piping that leads to the throttle body and another hose goes off a tpiece to the gate.

 

[brisvr4]

What brand boost controller are you using?

 

[nigel_a]

What brand boost controller are you using?

no idea mate. its a 2 stage boost controller. no stickers or anything on it.

 

[nigel_a]

ive connected the gate directly to the intake pipe and disconnected the boost controller. it peaks at 14psi and then backs off to 10. do i connect the controller to the other port? will be getting a new contoller aswel.

 

[GSRWRC]

Leave the bottom port connected straight to the pressure source between the i/c and throttle. Mine is setup with the top port going to a pressure source in between the turbo and i/c. I have a Norgren ported relieving regulator controlling boost which is plumbed into this line along with a 12v solenoid hooked up to a simple switch in cabin, (See pic attached). Flicking the switch sets the pressure the reg is set for.

Pretty simple, nice stable boost. Gives a high and low setting, (wastegate spring pressure and what the reg is set at)

 

[nigel_a]

Leave the bottom port connected straight to the pressure source between the i/c and throttle. Mine is setup with the top port going to a pressure source in between the turbo and i/c. I have a Norgren ported relieving regulator controlling boost which is plumbed into this line along with a 12v solenoid hooked up to a simple switch in cabin, (See pic attached). Flicking the switch sets the pressure the reg is set for.

Pretty simple, nice stable boost. Gives a high and low setting, (wastegate spring pressure and what the reg is set at)

thanks mate. this is the sorta setup i was after.

 

[bazeng]

How is your external gate attached? What is the entry angle of the pipe to the gate.

 

[nigel_a]

How is your external gate attached? What is the entry angle of the pipe to the gate.

ive got a flange welded on my manifold. still running the stock manifold. the flange is in between the turbo bolts and is only on a 50mm standing pipe. no bends or anything.