KA-T less power in S13 - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Boostin240sx · 07-25-2008, 10:56 AM

I had a 97' S14 with a KA-T in it tuned with a SAFC running 9 lbs with a T3/T4 and 370cc injectors. Due to an event at the track the car was scrapped and I transferred the motor and turbo setup to a 91' coupe. Same tune and getting similar A/F numbers as in the old car. It is not making near the power it did in the S14. I did use the S13 intake manifold to put it in the car and neither car has/ had a Z32 MAF. Timing on both cars are/ were 20 deg BTDC. I have been driving the car to work 4 days a week with the turbo setup for almost 6 months (knock on wood) and no problems except lack of power it had before.

Any suggestions on the reason for it?

LayNLow · 07-25-2008, 09:21 PM

S13 intake manifold has swirl control valves which do hinder airflow. Might want to try swapping upper intake manifolds with a S14. It is a direct bolt on as long as you use a tb/sensors(which are on the lower intake manifold anyways) for your harness.

Boostin240sx · 07-29-2008, 11:53 AM

Would it make that significant of a difference?

07-25-2008, 10:56 AM	#1
Boostin240sx Leaky Injector Join Date: Jan 2006 Location: VA - 757 Posts: 134 Trader Rating: (2) Feedback Score: 2 reviews	KA-T less power in S13 I had a 97' S14 with a KA-T in it tuned with a SAFC running 9 lbs with a T3/T4 and 370cc injectors. Due to an event at the track the car was scrapped and I transferred the motor and turbo setup to a 91' coupe. Same tune and getting similar A/F numbers as in the old car. It is not making near the power it did in the S14. I did use the S13 intake manifold to put it in the car and neither car has/ had a Z32 MAF. Timing on both cars are/ were 20 deg BTDC. I have been driving the car to work 4 days a week with the turbo setup for almost 6 months (knock on wood) and no problems except lack of power it had before. Any suggestions on the reason for it?

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07-25-2008, 09:21 PM	#2
LayNLow Zilvia Junkie Join Date: Oct 2005 Location: memphis tn Posts: 346 Trader Rating: (1) Feedback Score: 1 reviews	S13 intake manifold has swirl control valves which do hinder airflow. Might want to try swapping upper intake manifolds with a S14. It is a direct bolt on as long as you use a tb/sensors(which are on the lower intake manifold anyways) for your harness.

07-29-2008, 11:53 AM	#3
Boostin240sx Leaky Injector Join Date: Jan 2006 Location: VA - 757 Posts: 134 Trader Rating: (2) Feedback Score: 2 reviews	Would it make that significant of a difference?