165ECM knock sensor for 400SBC?
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Joined: Feb 2009
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From: Brisbane, Australia
Car: 1985 Pontiac TransAM
Engine: 400SBC 24x conversion
Transmission: T700r Stage2 Shiftkitted
Axle/Gears: 2.77 9 Bolt
165ECM knock sensor for 400SBC?
Hey guys,
Just ordering the last of the little bits for my 400 swap and needed to check if I can use a 350SBC knock sensor, or need a special one for a 400 block?
Running 165ECM, and swapping later to 0411 but from what I understood the knock detection is based on a particular noise/frequency which would differ between 305/350/400.
Is that correct or myth?
Also do the 165ECM sensors/senders work with 0411PCM setup or do I need different sensors for each?
Just ordering the last of the little bits for my 400 swap and needed to check if I can use a 350SBC knock sensor, or need a special one for a 400 block?
Running 165ECM, and swapping later to 0411 but from what I understood the knock detection is based on a particular noise/frequency which would differ between 305/350/400.
Is that correct or myth?
Also do the 165ECM sensors/senders work with 0411PCM setup or do I need different sensors for each?
Joined: Sep 2003
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From: Pittsburgh PA
Car: 89 Iroc-z
Engine: 555 BBC Turbo
Transmission: TH400
Axle/Gears: MWC 9” 3.00
Re: 165ECM knock sensor for 400SBC?
As far as i know they dont make a knock sensor for a 4.125 bore motor. Use the 350 one.
I did that for my 400 but i was using 730 ecm. Seemed to work fine
I did that for my 400 but i was using 730 ecm. Seemed to work fine
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From: Calif
Car: 75 Vette
Engine: 406 TPI
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Thread Starter
Senior Member
Joined: Feb 2009
Posts: 874
Likes: 18
From: Brisbane, Australia
Car: 1985 Pontiac TransAM
Engine: 400SBC 24x conversion
Transmission: T700r Stage2 Shiftkitted
Axle/Gears: 2.77 9 Bolt
Re: 165ECM knock sensor for 400SBC?
Awesome, thanks guys, one less thing to worry about now 
Joined: Oct 2001
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From: Il
Car: 1989-92 FORMULA350 305 92 Hawkclone
Engine: 4++,350 & 305 CIs
Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5
Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: 165ECM knock sensor for 400SBC?
I don't use a knock sensor on my 4xx .. MAF ECM
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Sep 10, 2015 09:07 PM