Another dead ka-t (pics) - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

CylonFrakker · 11-18-2006, 01:54 PM

370cc injectors are not enough for 7-10 psi. You were probably at extremely lean points especially when the stock KA ecu likes to advance timing at about 3500 RPMs. Next time spend the money on a good wideband and a map ecu or go stand alone. It will cost less in the long run.

sr20player · 11-18-2006, 07:27 PM

Quote:

Originally Posted by Supraflame

370cc injectors are not enough for 7-10 psi. You were probably at extremely lean points especially when the stock KA ecu likes to advance timing at about 3500 RPMs. Next time spend the money on a good wideband and a map ecu or go stand alone. It will cost less in the long run.

how can you say 370cc are not enough? the ECU was tunned for them by JWT. the injectors came out of my sr and that runs 11psi stock. how can it be lean. it was tunned for 10 psi and he was only running 7psi. I think that would make it rich.

nosajton · 11-18-2006, 07:32 PM

stock cast KA pistons suck for turbo. you'll eventually blow a ring land because the rings are so close. one detonation off sync will blow every piston into pieces.

im surprised it lasted as long as it did. my stock KA-T lasted 6 weeks at 10psi with my personal dyno tuned eprom. was pushing about 280whp. then i blew a ring in #4 cylinder..

just rebuild the motor with forged pistons and you'll be fine. its the best 400 you'll spend and it should be able to handle anything that t25 could spin

11-18-2006, 01:54 PM	#1
CylonFrakker Zilvia Addict Join Date: Apr 2003 Location: Nashville TN Age: 43 Posts: 899 Trader Rating: (3) Feedback Score: 3 reviews	370cc injectors are not enough for 7-10 psi. You were probably at extremely lean points especially when the stock KA ecu likes to advance timing at about 3500 RPMs. Next time spend the money on a good wideband and a map ecu or go stand alone. It will cost less in the long run. __________________ UGR.....SOMETHING WICKED THIS WAY COMES....

11-18-2006, 07:32 PM	#3
nosajton Zilvia Junkie Join Date: Jul 2006 Location: San Diego Posts: 392 Trader Rating: (10) Feedback Score: 10 reviews	stock cast KA pistons suck for turbo. you'll eventually blow a ring land because the rings are so close. one detonation off sync will blow every piston into pieces. im surprised it lasted as long as it did. my stock KA-T lasted 6 weeks at 10psi with my personal dyno tuned eprom. was pushing about 280whp. then i blew a ring in #4 cylinder.. just rebuild the motor with forged pistons and you'll be fine. its the best 400 you'll spend and it should be able to handle anything that t25 could spin