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View Full Version : Question on knock sensor placement...502RJ



tomspo04
07-21-2006, 07:42 AM
I'm haveing trouble with the placement of the knock sensor on my RJ502. When mounted on the right side the sensor plug butts up against a header tube. When mounted on the left it doesn't butt the header but comes close enough to look like it could melt. Has anyone found a fix for this?

P.S. I'm running Heddman 2" primaries with 3" collectors.

EFI69Cam
07-21-2006, 02:18 PM
Right above the KS mount there should be a mount for a heat shield. The production EFI gen 6 454s in trucks used these. Ask for a 99 2500 suburban application.

tomspo04
07-21-2006, 04:25 PM
Right above the KS mount there should be a mount for a heat shield. The production EFI gen 6 454s in trucks used these. Ask for a 99 2500 suburban application.

EFI, What do you mean by the "KS" mount? And, are you saying that I should get a knock sensor for a 99 Burb? Thanks for your help...

Tom

Fuelie Fan
07-21-2006, 04:32 PM
KS = knock sensor
I think he's saying buy the shield, not the sensor, but maybe both?

DeltaT
07-21-2006, 09:45 PM
The KS mounts in a 3/8" NPT hole on either side of the block. I think he's calling a hole the 'mount'. I know there's a couple small tapped holes around their on later blocks.

I've used a thick wrap of header wrap to insulate the header tube where it got too close to something. That might work here, say 2" above down to 2" below the KS. You could also dent the tube in for a little more clearance. I put a dimple in my Hedman Huslers for starter clearance. A little clearance bump won't hurt any flow.

Jim

tomspo04
07-22-2006, 04:46 AM
Thanks, guys... I like the idea of insulating the header tube. Rockdogz PM'd me a link to some good harness shielding, as-well. I think I'll use both. I appreciate all of the help.

Tom

EFI69Cam
07-26-2006, 04:04 AM
EFI, What do you mean by the "KS" mount? And, are you saying that I should get a knock sensor for a 99 Burb? Thanks for your help...

Tom

I meant the hole for the knock sensor. I would get the shield from the Burb.