MancheKid86 Posted June 15, 2019 Share Posted June 15, 2019 long story short, i have been given a free (used) pace setter headder for my 4.7L build. the forward bank goes directly in the way of the factory blind hole the accelerometer attaches to. now my question. i understand the overall diameter of the holes themselves are different and would require some modifications to have it fastened to the block. other than that does anyone see a reason why i cannot just relocate the knock sensor further back to the blind hole between cyl 5/6? vs the factory location cyl three? Link to comment Share on other sites More sharing options...
DirtyComanche Posted June 15, 2019 Share Posted June 15, 2019 They put it there so it would be as effective as possible, given it's basically in the middle of the engine, since the vibration is somewhat dampened by the engine itself over farther distances. Newer engines use multiple knock sensors partly for this reason, along with to ensure some redundancy for the event of inevitable sensor failure. I think you could move it back, it might not be ideal but it probably wouldn't matter. If there's a convenient boss near the middle of the other side of the block, that might be a good option too. You could also do something super hack like welding a nut, with the correct metric thread, on to the side of the block somewhere in the middle... But you didn't hear me suggest that. Link to comment Share on other sites More sharing options...
jeeptec1 Posted June 15, 2019 Share Posted June 15, 2019 You maybe able to relocate it but in the middle the sensor is more apt to pick up detonation vibrations somewhat equally. In the rear it may only pickup the rear cylinders. Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
Ωhm Posted June 15, 2019 Share Posted June 15, 2019 I would think the KS is a finely tuned circuit to a specific location. Link to comment Share on other sites More sharing options...
MancheKid86 Posted June 17, 2019 Author Share Posted June 17, 2019 i have found a dead hole on the otherside of the block that would be a sufficient relocation that is +/- an inch from the factory KS location. there would be a simple adapter needed to mount the velocometer. i have chosen to not go this route for the reasons being the pace setter header the machine shop had given me is indeed for a TJ and not a xj/mj the forward bank points directly towards the front differential, where as in a tj the front axle would be much further forward of the engine and would not be an issue long story short, knock sensor is in its factory location. i have ordered a new header and this one is going up for sale to recoop some of the purchase price of the new manifold. thank you for the reply's and entertaining my idea Link to comment Share on other sites More sharing options...
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