Shudder under boost - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Mexik · 07-08-2017, 12:53 AM

So recently my s14 has started to shudder under high boost. When im driving everything will be fine but when I make high boost (from 12-17psi) the rear end of the car starts to vibrate heavily, I feel a power loss as if I've lost all boost pressure and the car revs

Mod list:
Hks stage 1 cams
Nistune ecu
Os giken super single plate clutch
Garret 2876r ball bearing turbo
Stainless manifold
Braided turbo lines
Greddy intake pipe
3" turbo back exhaust with x force dump
1000cc injectors
Z32 afm
Gtr fuel pump
HDI triple core fmic
Turbosmart boost tee
Gk tech clear CAS
Gk tech rocker arm stoppers
Upgraded oil pick up
Oversized baffled sump
Full sized alloy rad with Thermo fans

Suspension/brakes
D2 8 piston front calipers
D2 330mm slotted rotors
S14 2 piston rear brakes
Ultra racing coilovers camber/height/damper
Adjust rear toe arms, traction arms and camber arms
R200 3.9:1 shimmed LSD diff
Gk tech solid cradle bushes
Gk tech solid diff bushes
Rose joint caster arms
Rose joint tie rod ends

EarlsWorld · 07-11-2017, 06:00 PM

Are you sure it is coming from the rear of the car? could the vibrations be mid/front possibly?

07-08-2017, 12:53 AM	#1
Mexik Join Date: Jul 2017 Location: NSW Age: 26 Posts: 2 Trader Rating: (0) Feedback Score: 0 reviews	Shudder under boost So recently my s14 has started to shudder under high boost. When im driving everything will be fine but when I make high boost (from 12-17psi) the rear end of the car starts to vibrate heavily, I feel a power loss as if I've lost all boost pressure and the car revs Mod list: Hks stage 1 cams Nistune ecu Os giken super single plate clutch Garret 2876r ball bearing turbo Stainless manifold Braided turbo lines Greddy intake pipe 3" turbo back exhaust with x force dump 1000cc injectors Z32 afm Gtr fuel pump HDI triple core fmic Turbosmart boost tee Gk tech clear CAS Gk tech rocker arm stoppers Upgraded oil pick up Oversized baffled sump Full sized alloy rad with Thermo fans Suspension/brakes D2 8 piston front calipers D2 330mm slotted rotors S14 2 piston rear brakes Ultra racing coilovers camber/height/damper Adjust rear toe arms, traction arms and camber arms R200 3.9:1 shimmed LSD diff Gk tech solid cradle bushes Gk tech solid diff bushes Rose joint caster arms Rose joint tie rod ends

07-11-2017, 06:00 PM	#2
EarlsWorld Join Date: Jan 2017 Location: alberta canada Age: 25 Posts: 44 Trader Rating: (0) Feedback Score: 0 reviews	Are you sure it is coming from the rear of the car? could the vibrations be mid/front possibly? __________________ How cool is being cool?