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  1. #61
    Formerly known as Yellow Wagon jbiscuit's Avatar
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    Quote Originally Posted by SSDude View Post
    Bad wire or plug you'd have a noticeable miss.
    Correct. The air-fuel actually looks pretty good. Hmm. The plugs suggest a little lean however tho that could be from cruise. Perhaps that's a bit lean. The plug wires in good shape? No cuts or anything in them specifically the wire for that cylinder? What about the cap?
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  2. #62
    ┌∩┐(◣_◢)┌∩┐ Super Mario Mushroom Champion Starcastle Champion Korndogg's Avatar
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    Wires are fine. I'll take another look tomorrow. I didn't look at anything with the ignition yet. I did my compression test and was done for the day. I understand the one plug possibly being an issue but wtf is with all of the black smoke if the afr looks fine?

    For the record, I have and MSD HEI distributor with a 6al box.
    1968 Camaro 383

  3. #63
    ┌∩┐(◣_◢)┌∩┐ Super Mario Mushroom Champion Starcastle Champion Korndogg's Avatar
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    Another thing is, if my compression test turned out fine, I shouldn't really have crankcase pressure, especially with my two breathers correct? So how was oil spraying out of my old valve covers and my dipstick popping up?
    1968 Camaro 383

  4. #64
    Quote Originally Posted by Korndogg View Post
    So how was oil spraying out of my old valve covers and my dipstick popping up?
    It magically turns into a 4g63 when you close the hood?
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  5. #65
    A regular know-it-all Tetris Champion Snake Champion Lasagna From Heaven Champion Mac Man Champion Mahjong. Champion Mini Putt 3 Champion Plastic Saucer Champion Ratman Ralph Champion Prince Valiant's Avatar
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    Quote Originally Posted by Korndogg View Post
    Another thing is, if my compression test turned out fine, I shouldn't really have crankcase pressure, especially with my two breathers correct? So how was oil spraying out of my old valve covers and my dipstick popping up?
    Because racecar.

    You DO have high crankcase pressure...there really is no doubt on that. It's VERY possible to have good compression test results and crummy leakdown results. Tom has talked many times about this occurrence.

    BUT the compression test was VERY instructive here...surprised with the results actually. Essentially that is a very stout bottom end. More cylinder pressure than I would have expected with those large chambered heads...but that's good, it says the basic parts are there to work very well imo.

    If you've got access to the leakdown tester, try running that. If you're seeing 25-30 percent or more, then be plan on redoing it. If you don't, try a PCV valve routed to the rear vacuum port on your carb...the vacuum will actually help end the leaking valve covers/blowing of dipstick.

    With the fairly high stall TC and decent gears you've got in that light car, maybe ask around if it's feasible to do a mechanical carb...much better throttle response. Fuel mileage and low rpm cruising w/ the OD trans is no longer a concern anymore as it was when specifying the carb, so why not go with the one that could give you the best power? Like I said...ask around. If you had a 4500rpm stall TC, 4.10 gears in a light little nova, I'd say do it, no doubt. But you're definitely closer to still wanting a vacuum secondary...but I don't think it's beyond the scope of plausibility to suggest you could probably do a mechanical secondary either...
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  6. #66
    OHHHHH Josepy's Avatar
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    Just rip the fucking motor out and get it fixed already. There problem solved.
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  7. #67
    ┌∩┐(◣_◢)┌∩┐ Super Mario Mushroom Champion Starcastle Champion Korndogg's Avatar
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    1968 Camaro 383

  8. #68
    OHHHHH Josepy's Avatar
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    Quote Originally Posted by Korndogg View Post
    LOL I am not mad. Burn the fucker to the ground. That is what old camaros are good for. Bwaahhhhhh
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  9. #69
    ┌∩┐(◣_◢)┌∩┐ Super Mario Mushroom Champion Starcastle Champion Korndogg's Avatar
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    You're drunk aren't you.....lol
    1968 Camaro 383

  10. #70
    OHHHHH Josepy's Avatar
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    Quote Originally Posted by Korndogg View Post
    You're drunk aren't you.....lol
    LOL Surprisingly not at all. Actually at work fixing some laptops.
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  11. #71
    ┌∩┐(◣_◢)┌∩┐ Super Mario Mushroom Champion Starcastle Champion Korndogg's Avatar
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    Well then just fuck you then....hahaha
    1968 Camaro 383

  12. #72
    Ol' School BAD LS1's Avatar
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    Oil Leak, carb tune, etc....

    Some engines do pour black smoke at wot though the afr says otherwise. Not sure why that happens, could be two of the same kinda vehicles, one will do it, other not so much. Sounds like the lack of power made too is being over looked?
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  13. #73
    Formerly known as Yellow Wagon jbiscuit's Avatar
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    I haven't forgotten that point either Tommy. This thing is waaaay down on power. That one plug is either not firing or intermittently firing...which would contribute to the lack of hp obviously. Miss mistaken for lumpy cam perhaps lol
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  14. #74
    Agree with Prince, you obviously have blow by. Leak down test will confirm. Probably some sort of issue like bad rings with whatever cylinder had the wet looking plug in it. Really nothing else will make your dipstick blow out, not to mention the oil leaks, smoke, other symptoms.
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  15. #75
    ┌∩┐(◣_◢)┌∩┐ Super Mario Mushroom Champion Starcastle Champion Korndogg's Avatar
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    Well I guess I'll start tearing it down tonight if I have time. Otherwise this week for sure. I'll probably have a ton more questions since this is only the second time I've done this lol.

    Where should I take the block and what should I have done to it?


    Also Tom, I didn't forget about the lack of power, I just thought maybe it would have been carb related. This thing idles with black smoke. Either way though, I'm getting a new carb no matter what I do.
    1968 Camaro 383

  16. #76
    ┌∩┐(◣_◢)┌∩┐ Super Mario Mushroom Champion Starcastle Champion Korndogg's Avatar
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    Just for fun. Lets come up with some (reasonable) ideas that I could do while I have this thing apart. For instance, I thought about lowering the compression and eventually throwing a supercharger on it. I'm getting rid of the Eddy carb no matter what.

    Who knows, maybe I'll end up changing stuff up.

    Here's what I have now.

    383 stroker

    10.5 compression

    Lunati Cam - Duration - 276/284, Lift - .504/.525

    AFR 195 Street heads 74cc

    Edelbrock 750

    1.5 Comp Gold rockers

    Ohio Crankshaft 4340 3.75" crank

    6" H-beam rods

    SRP flat top pistons.
    1968 Camaro 383

  17. #77
    A regular know-it-all Tetris Champion Snake Champion Lasagna From Heaven Champion Mac Man Champion Mahjong. Champion Mini Putt 3 Champion Plastic Saucer Champion Ratman Ralph Champion Prince Valiant's Avatar
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    Still say do the leakdown...don't rebuild unless you get over 20% leakdown on one of the cylinders. Nothing hurt by seeing what you've got.
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  18. #78
    A regular know-it-all Tetris Champion Snake Champion Lasagna From Heaven Champion Mac Man Champion Mahjong. Champion Mini Putt 3 Champion Plastic Saucer Champion Ratman Ralph Champion Prince Valiant's Avatar
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    Quote Originally Posted by Korndogg View Post
    Just for fun. Lets come up with some (reasonable) ideas that I could do while I have this thing apart.
    As for the "for fun" ideas, I'd consider getting a bigger cam.

    Let's not forget, the cam selected was supposed to work with a vehicle utilizing a lower stall torque converter and a 2.39:1 final drive ratio (0.7:1 of the OD trans w/ 3.42 rear). The carb was too (eddy's in general have far better tuneability for part/low throttle settings)...and since you now have a decent stall T/C and three speed non-od trans, might as well loose the remnants of your current engine that were specified for those narrow objectives. Bigger cam, more serious carb...though either way, it may be wise to consider going to a deeper rear end in the future...3.90+ gears would work best.

    But even with the 3.42's and the loose T/C, you should be able to be pretty happy with something in the 240-244 range duration @ .050, sticking with a HYD flat-tappet cam. Keeping the LSA narrow too around 108-110, no more...
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  19. #79
    Jack of all Asses Wagonbacker9's Avatar
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    LS swap.

    Tehe.
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  20. #80
    OHHHHH Josepy's Avatar
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    Quote Originally Posted by Wagonbacker9 View Post
    LS swap.

    Tehe.

    I have been trying to get him to do this.
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