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Post by bigdaddy2607 on Apr 12, 2009 6:23:00 GMT -5
i just took my new motor out for the first long test drive. oil pressure starts out at 65 but when engine is really warmed up it dropped down to 20 sitting at a stop in gear. put in neutral it goes up to 25 or 30. im using a k&n filter with royal purple break in oil. maybe that oil is getting ti thin when hot? what do you think? thanks ken
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Post by ricks67 on Apr 12, 2009 11:07:59 GMT -5
Thats about what my oil pressure is. at 185-190 degrees it's about 25-30. when temp is above 200 it's 20-25# I'm running 10-30 weight oil with a bottle of Crane breaking lube.
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Post by bigdaddy2607 on Apr 12, 2009 11:36:28 GMT -5
thanks rick.. after researching im finding out its pretty normal. but im noticing some deiseling at low idle. i have 13/8/1 alum headed 468bbc with 630/630 flat tappet cam with dist lock out at 38deg. im thinking i might need to unlock dist and go to an initial timing and a total timing. i think some of the probablem is running 1/2 110 and 1/2 93 oct. if the unloct dist doesnt work it will have to be all out 110octane. if that is the case im deffenitley going corn. any input would be appreciated. would like to get this nuts straight before oc cruise
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Post by ricks67 on Apr 12, 2009 12:06:34 GMT -5
I'm running 18* initial 22 with the vac adv hooked up and 36 total all in by 2500 rpm. No problem here with dieseling. The only time the motor did was when idle was too high. Mine is about 900- 950 in N and 800 drive.
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Post by bigdaddy2607 on Apr 12, 2009 17:28:04 GMT -5
im going to take out dist and unlock it and set up some kind of curve. this motor idles in park around 1400 in gear around 1000 or 1100[5000 stall converter] once it gets hot it wants to deisel below 1000 rpm starting to wonder if idle restrictors are too small?
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Post by bracketchev1221 on Apr 12, 2009 18:26:56 GMT -5
13.8-1 is not mixed gas at all. You are almost to straight 112 gas. A 630/630 cam is probably on the small side for duration so the compression is real high at low rpm. Get the 93 out of there. If you are not having a cranking problem starting it, leave the timing locked out. I tried it and though it did idle better I kept breaking flexplate teeth. So I went back to a 85551 dist with light springs, so it idles at like 30 something degrees and full advance at 40. To give you an idea, mine is in the same area of compression as yours, aluminum head, 275/287 @.050 .788/.765 cam, 40 degrees timing on straight 112.
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Post by bigdaddy2607 on Apr 13, 2009 17:56:24 GMT -5
13.8-1 is not mixed gas at all. You are almost to straight 112 gas. A 630/630 cam is probably on the small side for duration so the compression is real high at low rpm. Get the 93 out of there. If you are not having a cranking problem starting it, leave the timing locked out. I tried it and though it did idle better I kept breaking flexplate teeth. So I went back to a 85551 dist with light springs, so it idles at like 30 something degrees and full advance at 40. To give you an idea, mine is in the same area of compression as yours, aluminum head, 275/287 @.050 .788/.765 cam, 40 degrees timing on straight 112. thanks. i will try it. my duration is int 271 exh 279 at .050 110 deg lobe sep |
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Post by bracketchev1221 on Apr 14, 2009 14:36:49 GMT -5
No problem, I hope it works out.
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Post by bigdaddy2607 on Apr 15, 2009 17:23:44 GMT -5
No problem, I hope it works out. hey brakt. how did you get your dist set up for 30 initial and 40 total. i just set mine up with the largest bushing stop[black] which will give me 18deg advance. so i will have 20 initial +18 =38 total coming in around 2200 rpm. im hoping this will work. did you get a 10 deg bushing some where? thanks ken |
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Post by bracketchev1221 on Apr 15, 2009 18:02:43 GMT -5
Don't worry about the initial so much. I left mine with the bushing it came with and the blue springs. The issue is mine idles at 1600-1700 in neutral. So the distributor is advancing already. Since the distributor is not locked anymore, you want to try to get it advancing as early as possible to clean up the idle. Then whatever is left in the weight travel will get you the total. Try it with the light springs and set your total. Then set your idle speed in neutral and see what your initial is if you can read it with it bouncing around.
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