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HT4100 4.1, 4.5, 4.9 Discussion, 4.9 performance in Cadillac Engine Technical Discussion; Something this rare has to be worth something to somebody! I would have left it as original and untouched as ...
  1. #31
    Ralph's Avatar
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    Something this rare has to be worth something to somebody! I would have left it as original and untouched as possible, because if you want special distinction, or collector resale value, original=big bucks!!

  2. #32
    Brett's Avatar
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    Or maybe its just a regular 4.9 and the kid got ripped off. Sure looks pretty normal


    http://www.cadillacforums.com/forums...?t=4400&page=2

  3. #33
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    Re: 4.9 performance

    Hey whats up, my name is Kevin, I am 17 and I work at McDonalds.

    It's a nice car, I saw the pics. The 4.9 isn't anything to be ashamed of, either. This sounds like one of those cases where if somebody tells the same lie three or four times, they start to believe it themselves.

    That's a real shame.

  4. #34
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    Re: 4.9 performance

    why would cadillac even bother with this engine, the N* is derived from the Aurora not the 4.9....believing this is madness i tell you

  5. #35
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    Re: 4.9 performance

    Maybe we should make him a "4.9L NORTHSTAR" sticker to put on that bad boy? Then people would believe it!

  6. #36
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    Actually the NorthStar came from the Quad4 4banger from the late 80's which has absolutly nothing to do with the 4.9 at all......

    ...... looks to me like someone took off the 32v NorthStar badge and stuck it on that car, then when selling it said, Hey, look at this, see how it says 32v NorthStar on the back? but the enigne says 4.9L? well, this is a special 4.9l 32v Northstar.....

    only a sucker would go for it.... other wise, it is pretty much imposiible for the 4.9 to have 32v

  7. #37
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    Re: 4.9 performance

    yup standard 4.9 , no way 16 valves on each bank of cylanders would fit under those valve covers , tried to be open minded about the kid and thought "maybe" it was true...oh well

  8. #38
    aaronrus is offline Cadillac Owners Member
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    Re: 4.9 performance

    well, ther is ONE possibility.. i have seen aftermarket kits to turn regular 350 SBCs into a 32 valve setup, and its still OHV pushrod...perhaps soemone had a custom 32 valve set of head put on.. for shits and giggles.. heheheh..
    either way, the ONLy way to tell is if this jackass wants to tear off the top of his engine and take pics..



    Quote Originally Posted by Stoneage_Caddy
    yup standard 4.9 , no way 16 valves on each bank of cylanders would fit under those valve covers , tried to be open minded about the kid and thought "maybe" it was true...oh well

  9. #39
    HippieD9 is offline Cadillac Owners Fanatic
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    Re: 4.9 performance

    We already know it's not what he says.... But this is a good thread, I'm doing injectors and a camaro-style exhaust in the next week and I'll post how it goes. We need to find a better aftermarket for these cars, any ideas other that chip/ignition/injectors/exhaust/thermostat/air filter?

  10. #40
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    Re: 4.9 performance

    I just finished! 8 Accel Performance injectors (19 lb/hr) and a Walker Sound FX muffler / tail pipes for a 87 305 H.O. Camaro. Sounds wicked! I burned em through most of first gear test driving it. What kind of experiance have people had with the fastchips chip?
    Thanks,
    D.

  11. #41
    p8ntman442 is offline Cadillac Owners Member
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    Re: 4.9 performance

    Hey rick, whats with you making posts that arnt 1.2 gb long
    On here your posts are short and sweet.

  12. #42
    RPM
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    Question Re: 4.9 performance

    Hey guys i'm new to this whole thing but I'm wondering if a cheap, effective addition would be one of those turbo air twister things like a Cyclone. Supposedly they act like Ram Air for any car. It must improve the airflow a little bit but i'm not sure if it's enough to notice. Anyway just thought i'd throw my input in. I think they Cyclone goes for around $60, so if it works then it might be worth it.

  13. #43
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    Re: 4.9 performance

    use that money to get a couple "type R" stickers or some cool lighted racing pedals... they'll give you about the same amount of performance. plus, I don't know if they'll fit the caddy...?

  14. #44
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    Re: 4.9 performance

    Quote Originally Posted by RPM
    Hey guys i'm new to this whole thing but I'm wondering if a cheap, effective addition would be one of those turbo air twister things like a Cyclone. Supposedly they act like Ram Air for any car. It must improve the airflow a little bit but i'm not sure if it's enough to notice. Anyway just thought i'd throw my input in. I think they Cyclone goes for around $60, so if it works then it might be worth it.
    they only help the engine at Wide Open Throttle. so it's a marketing gimmick. don't waste your money or time with that crap.
    you want to make more air flow make a totally custom air intake like i am soon.

  15. #45
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    Re: 4.9 performance

    I have been really thinking about the intake system on the 4.9, I heard it is pretty free-flowing, and from the looks, it is... the only thing is, when the air first enters the system, the tube gets really small before the airbox, then at the air box and after that it really opens up.... now there are 2 things I was thinking of:

    1) it is designed to be "restricive" for whatever performance/sound reasons they had

    2) Bernolis (sp) principle... increase in velocity = decrease in pressure, and by having the hose there "pinch" together, it may definitly apply to that.....

    .... I have been thinking about what to do, it would be very easy to get a cold air intake or something, but I really like the look of the factory intake system/airbox with the 4.9 sticker..... now I have been thinking about getting an air box form a junkyard (since I don't want to start hacking my nice one up) and maybe cutting out the bottom, and have the intake air reloacted, or maybe have 2 locations for air to come in..... that just seems really restictive to me, and I think that if it was opened up, it could be made to flow better...... but if more air went into the engine, would the ECM add more fuel, and therefore get more power, or try to adversly compensate for it (thinking something is wrong) and maybe loose power?

    Another thing, being that the 4.9 has the old school Throttle Body setup, in which it is on the top of the intake manifold, like where a carbuator would be, there are alot of possibilites if someone wanted to get createve, hack up the hood a little (which I am not doing) maybe even going extreme and adding a blower (oh man that would be sweet) but that can also aid in doing things with the intake....

    were those 19lb Accel fuel injectors worth the money? big differnce over the stock injectors?

    Also, I am gonna be replacing the plugs/wires once I get her back on the road.... she has 87k miles on her now and the car has AC Delco platnium plugs that are supposed to last 100k miles..... should I get them replaced with AC Platniums, or use NGK or Bosch +4 (which I heard some good things about and quite a bit of bad things) and AFA wires, I want to get nice high performance wires.... or should I go with the regular AC Delco? What about the dist. cap and rotor?

    see, I want to get the best plugs/wires/cap+rotor as I can, since there aren't many performance parts for the engine as it is, so if I have any chance to get something that may improve the performance, even slightly, and I am going to be doing the work already, I want to go with the best.

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