Back Pressure on S14 SR20DET - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

naz280z · 02-26-2017, 05:54 AM

Hi Fellas,

I own a 240SX S13 with SR20DET from 96 Zenki S14 Blacktop.
Mods:
Stock Engine
Tomie manifold
Garret GT2860 Turbo
1000cc injectors
walbro 255 fuel pump
3" Exhaust
Blitz Intercooler
Blitz BOV
Link ECU Storm G4+

I was tuning my car over the weekend here in Dubai and unfortunately while my car was on the dyno i lost compression in cylinder 1 (Zero compression) due to too much back pressure (30 psi) according to the tuner.

The oil dip flew out of the engine bay twice spraying oil all over the place but second time it blew a cloud of white smoke with it then we stopped to check the compression in all cylinders and realized there was no compression in cylinder 1.

The car made 324WHP before losing cylinder 1. The tuner suggested to rebuild the engine possible piston ring failure and once the engine is rebuilt to use an oil catch can to help with the back pressure.

Anybody experience this crazy back pressure on their builds?

02-26-2017, 05:54 AM	#1
naz280z Join Date: Feb 2017 Location: Dubai Age: 31 Posts: 11 Trader Rating: (0) Feedback Score: 0 reviews	Back Pressure on S14 SR20DET Hi Fellas, I own a 240SX S13 with SR20DET from 96 Zenki S14 Blacktop. Mods: Stock Engine Tomie manifold Garret GT2860 Turbo 1000cc injectors walbro 255 fuel pump 3" Exhaust Blitz Intercooler Blitz BOV Link ECU Storm G4+ I was tuning my car over the weekend here in Dubai and unfortunately while my car was on the dyno i lost compression in cylinder 1 (Zero compression) due to too much back pressure (30 psi) according to the tuner. The oil dip flew out of the engine bay twice spraying oil all over the place but second time it blew a cloud of white smoke with it then we stopped to check the compression in all cylinders and realized there was no compression in cylinder 1. The car made 324WHP before losing cylinder 1. The tuner suggested to rebuild the engine possible piston ring failure and once the engine is rebuilt to use an oil catch can to help with the back pressure. Anybody experience this crazy back pressure on their builds?