Recent content by uhcoog1

  1. U

    Oil pressure dropping at higher RPM - need help

    Thanks man! It's a hilborn intake- same ITB style.
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    Oil pressure dropping at higher RPM - need help

    Older musclecar: '73 duster Video from this past weekend chasing an ACR-X http://youtu.be/MQzxFhozeb8
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    Oil pressure dropping at higher RPM - need help

    30 weight was recommended by the builder for break in. A few fast 3G Hemi's on the drag strip have benefitted from adding oil drainback lines from the rear of the valve covers to the pan. I tried a quart high and a quart low. Did not see a difference. I'm putting 10w-40 conventional in...
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    Oil pressure dropping at higher RPM - need help

    That's some solid data you have! I like it! What data acquisition system are you using? Mine is all through megasquirt MS3x. At some point I'll need to add more sensors - I only have 3 generic ports currently wired, but it can handle like 16. So for the time being, I'll be swapping between oil...
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    Oil pressure dropping at higher RPM - need help

    previous accusump plumbing. Have since bypassed cooler and check valve (and capped accusump line for clean data):
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    Oil pressure dropping at higher RPM - need help

    Previously acquired data- on both sides of a -10 check valve: Max psi: 67 psi pre check valve 50 psi post check valve RPM: 195*, 170*1, 170*2, 3000: 61/45 (63/48) nd/nd 4000: 56/42 (56/44) 63/48 5000: 61/44 (59/45) 59/46 5500: 55/41 (58/45) 57/44 6000: 57/43 (46/38) 51/41 6500: 56/43 (48/39)...
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    Oil pressure dropping at higher RPM - need help

    A_Harman- factory bearing specs above (looks like we posted at almost the same time). last motor was a stock 6.1 that was pulled and sold. New motor is ~100 rwhp more. Unfortunately I was not logging oil pressures at the time.
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    Oil pressure dropping at higher RPM - need help

    Data is from data logs (aside from oil temp- dash gauge). Sensor 1 is oil pressure post filter. 2nd gear pull on street. 3rd gear pull on street. Last of day. Oil maybe slightly warmer?
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    Oil pressure dropping at higher RPM - need help

    Factory service manual states .0009-.0020 main, and .0007-.0023 rod. 0.002 main and 0.0025 Rod is pretty common practice in these motors. I was running the straight 30 wt for break in. Was going to swap that out for 10w-40 conventional, then swap to 0w-40 synthetic. But, now I'm wondering if a...
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    Oil pressure dropping at higher RPM - need help

    The motor is used for HPDE / road race / street driving. I shifted the last motor at 6,000-6,200 rpm, and this motor I'll pfobably shift at 6500 and maybe leave it in gear at 6500 or so when slowing for a high speed corner. The motor will see 7,000 on occasion. I was just trying to follow the...
  11. U

    Oil pressure dropping at higher RPM - need help

    Having oil pressure issues after 5200 rpm or so. 61 psi @ 3500 rpm 61 psi @ 4000 rpm 62 psi @ 4500 rpm 62 psi @ 5000 rpm 55 psi @ 5500 rpm 50 psi @ 6000 rpm 48 psi @ 6500 rpm 54 psi @ 6900 rpm 81 psi was registered on cold start up Info: Rebuilt 6.1 hemi .0025 main bearing clearance .002 rod...
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