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Thread: xaza's 98 ZJ 5.9L Build

  1. #61
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    Default Re: xaza's 98 ZJ 5.9L Build



    I happened across some Edelbrock headers, new unused. Quite a treat because they stopped making them but they are great headers. They arrive next week and hopefully will get them on before running on dyno. Had to work today so missed out on stopping by Carz and Truck & Jeep Fest. Next step will be to complete the exhaust the rest of the way out. Found a guy that machines stock throttle body to 52mm that I want to get. After exhaust and TB I will be ready for another trip to Bandimere. Will get pics as soon as I can.
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    Default Re: xaza's 98 ZJ 5.9L Build



    Cool Cliff!

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    Default Re: xaza's 98 ZJ 5.9L Build



    My headers came in. Did some searching on the model #, Edelbrock 6604, and found it is for a 92-97 5.2L. Doing a little more research it appears the 5.2L and 5.9L stock gaskets and manifolds are the same. The inside welds are ugly and stick way out, at least an 1/8 to 1/4 inch and would certainly restrict airflow. I was wondering, should I grind them back to smooth? They are new and unused but would Edelbrock do anything being bought second hand especially a discontinued model? Pictures!
            
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    Default Re: xaza's 98 ZJ 5.9L Build



    I would grind them smooth. Is your ?? about Edelbrock swapping them for another set now, or after you grind them and there is a prob?

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    Default Re: xaza's 98 ZJ 5.9L Build



    Since they don't make them anymore I am likely just on my own but yeah I was thinking along the lines of issues down road.
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    Default Re: xaza's 98 ZJ 5.9L Build



    glacierpaul previously posted:
    "Is your ?? about Edelbrock swapping them for another set now"

    give em a call...the answer is always no until you ask..If its no then i would grind em down.

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    Default Re: xaza's 98 ZJ 5.9L Build



    If you want 'em a bit smoother, hit 'em with a die grinder. But I'll bet with all the money and resources Edelbrock probably spent on R and D, more than likely they far out-performed factory manifolds so it's probably not necessary.

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    Default Re: xaza's 98 ZJ 5.9L Build



    xaza previously posted:
    "The inside welds are ugly and stick way out, at least an 1/8 to 1/4 inch"

    If they protrude above the face of the flange, leave them alone.
    ___________
    The Lost Boys motto: We don't know where we're going, but we'll be there for awhile. :)

  9. #69
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    Default Re: xaza's 98 ZJ 5.9L Build



    Finally got some time to work on the truck. Took out the stock throttle body and installed a modified stock one. Has been bored out to 52mm. We also started removal of exhaust. The manifolds came off super easy but on the cat we ended up cutting y pipe to remove. slight miscalculation in cut and we ended up cutting it twice. The clamp on cat was pinched down so tight we didn't foresee being able to pull the pipe out. Hopefully tonight we will get new exhaust in. Did a little video of how truck sounded before, will see if it is a difference the camcorder can hear. Going to take headers to exhaust shop and get a professional opinion and possibly pay them to grind out and re weld. Once this project is complete I will be ready to take to dyno and then Bandimere.
             
    ___________
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    Default Re: xaza's 98 ZJ 5.9L Build



    I decided since it is going to cost quite a bit of time and money to get the headers bored out it would be a good idea to make sure they fit. Put them in with old gaskets for now and fitted together y-pipe. Stuck an old muffler off Wylie's truck into end of y pipe for now and started to burn off the shipping paint. Going to save some money by sand blasting(walnut shells) headers ourselves and then have them tig welded around outside of tube. After they are welded we will grind out ourselves. Pics so far.
             
    ___________
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    Default Re: xaza's 98 ZJ 5.9L Build



    Still working on getting a good tune before I hit the dyno, should be hitting Bandimere in next few weeks if plans go well. I am working with Hemifever tuning to get tune. As of late there is supposedly to be a much better tuner out there (according to a group of race heavy guys) but I want to give a solid chance to Sean. Will keep things updated and let y'all know what night is race night.
    ___________
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    Cesare Pavese

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    Default Re: xaza's 98 ZJ 5.9L Build



    Turns out when we installed exhaust it got pushed back and is vibrating against gas tank skid. Sounds like a good excuse to take it to exhaust shop and have a performance cat and muffler installed but it'll wait until after dyno run that should happen this week while on my mini vacation. Going to change gaskets and run it. Looking like Sept 18 will be the night to take it back to the track.
    ___________
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    Default Re: xaza's 98 ZJ 5.9L Build



    Here's the exhaust. Buy yourself a direct fit cat or however many are required from Summit and then take it to the shop and have them build the Y pipe to cat sections. Much cheaper then what they charge for the parts.

    http://www.summitracing.com/parts/sum-640000/overview/make/jeep/model/grand-cherokee

  14. #74
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    Default Re: xaza's 98 ZJ 5.9L Build



    I don't want to do it myself because I am entertaining the idea of changing to a dual exhaust and the guy my brother got his exhaust from is close, cheap and does good work. He knows his stuff and my brother recommends him. Thanks though Jon. Set appointment for tomorrow to get 3 pulls on dyno. Uber excited...anyone have any guesses to what it'll push?
    ___________
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    Default Re: xaza's 98 ZJ 5.9L Build



    Dual's would make finding a bolt on kit a bit harder.

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    Default Re: xaza's 98 ZJ 5.9L Build



    Got to dyno and have some real problems to work out. Max hp was under 190, max torque around 226. Talked to engine builder and they claim my Hughes intake manifold and 52mm throttle body are choking down engine and he believes it should have around 300 hp at the wheels. Offered to bore out stock manifold for $75 if I send it to him and he recommends a 55mm throttle body that his sales guy is supposed to call me back about. Was still a fun experience and think I should probably follow his recommendations and if it still doesn't perform as advertised go from there. Got a video, loud tires.
         
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    Default Re: xaza's 98 ZJ 5.9L Build



    ___________
    The Lost Boys motto: We don't know where we're going, but we'll be there for awhile. :)

  18. #78
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    Default Re: xaza's 98 ZJ 5.9L Build



    don't know how I missed this for so long Mike, sorry. Those are pretty cool but I am certain my throttle body is producing plenty of fuel/air. I am entertaining the idea and doing my research on building a water meth kit. It is right up my alley for piping, pumps and such. With my tuner being able to hold 3 tunes and my data logger (not finished installing yet) I think I can take good advantage of the timing advances with the cam. Still need to figure out what injectors I want to use. Guys at Speedfreaks.net are pretty good and have been learning from their experiences. Sooo close to completing my first 2 builds and getting anxious and trying not to put us in the poor house. This is a link to the system I would be mocking.
    http://www.213wheelsandtires.com/pro...=751&year=1978
    Boost juice can be mixed at home and adjusted to needs. Anybody have experience with water meth?
    ___________
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    Default Re: xaza's 98 ZJ 5.9L Build



    I finally went and got my exhaust replaced. Muffler was getting holes and it was time to open up some flow. Took it to the same guy that did our Cherokee's. Ended up scrapping the dual exhaust idea for now, but after hearing the way it sounds, I may ditch that idea entirely. When I pulled in and revved it a little my wife said the walls in kitchen were rattling. Upgraded to a 3" from the header down tubes out with a high flow muffler and cat. He also welded in the bung for installing my data logger, hopefully will get it done before it gets too cold.
           
    ___________
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    Default Re: xaza's 98 ZJ 5.9L Build



    This weekend I should be getting something off my shelf that has been waiting patiently, 42K volt ignition coil to allow more plug gap and consistent spark at higher RPM.
         
    ___________
    We do not remember days, we remember moments.

    Cesare Pavese

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