adding walbro and evo 560's with 16g

[Gvr41415]

you were right, i boost leak tested it and sure enough heard a loud hissing near my ear coming the turbo outlet to inter cooler pipe. now my car hits 15psi @5500-6000rpm.

 

[matt92vr4]

sounds like you are on the right track. It should hit 15psi before that though. Does it at least run smooth to redline?

 

[Gvr41415]

well i only drove it down the block with the hose duct taped (only temporary fix tilll i can find a new one) to see if it built boost from 1st to second. i noticed though with warm engine after accel in neutral the rpm would roll from 1000 to 1500. and i notice the gauge jumped from 15psi to 20psi right when i shift. dont know if thats normal with the diverter valve tho.

 

[Jason G.]

Edit: Thought you had a 2.5 exhaust. Looks like you may have boost creep from the 3" exhaust.

 

[Gvr41415]

its 2 1/2 to 3in at that elbow. i took it on the freeway for an exit just see if it was smooth all the way through and i felt power all the way through no hiccups. response is kinda slow though. how do you control or take advantage of the boost creep?

 

[LIV4PSI]

Port the internal wastegate flapper area, switch to an exteranl wastegate, or switch to a smaller exhaust. Option A is the most common, Option B is the most fun. /ubbthreads/images/graemlins/devil.gif

 

[gvr4ever]

The Walbro 255 over-runs the stock FPR at idle. You will likely need a good unit or it will run rich till you get in to 2-3psi. Mine did anyway...

 

[Gvr41415]

whats a good/cheap fpr to run?

 

[gvr4ever]

I have this one. I'm happy with the way it works, but it becomes a PITA if you need to change your plug wires. Pretty much need to remove the fuel rail way too often with this thing, but it's cheap.

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I don't know if it is a direct bolt on or if the base fuel pressure is correct, but the 2G stock fuel pressure regulator was good at taming a Walbro 190lph pump.

 

[Jason G.]

It's pretty easy to find a complete Aeromotive or Fuel Lab kit used in the 100-150 range.