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Looking for some talk on my new set-up!!

This is a discussion on Looking for some talk on my new set-up!! within the General Help forums, part of the LSx Technical Help Section category; Hey everyone!!! I just finished my engine work on my Z28 today, and I was looking for some input and ...

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    Looking for some talk on my new set-up!!

    Hey everyone!!!
    I just finished my engine work on my Z28 today, and I was looking for some input and some help....
    Here is everything I have installed in the past few days...

    Fibreglass SS hood (functional)
    SLP Lid
    Granateli MAF for cold air
    SLP Smooth Bellows
    Billet steel double roller timing chain
    Comp Cams Cam 222 224 @ 050 with 566 568 lift on 112 LSA
    Comp Cams Pro-Magnum roller rockers
    Comp Cams 1-Piece Pushrods
    Comp Cams Beehive Valve Springs
    Dynatech Stainless Long tube headers, Y-Pipe, Cats.
    Flowmaster after cat system
    MSD Coils
    MSD Super Conductor Wires
    NGK Plugs
    Meziere Electric Water Pump
    Underdive Pulley

    I couldnt wait to start it up so I havent put on any of the exaust after the headers but when I started it up it seems to really idle rough and the engine seems to be doing a bit of shaking, I use EFI Live and while scanning it I noticed that the timing is severly eratic, and the engine really seems to have trouble holding RPM. I installed brand new O2 Sensors as well and I also noticed that it really seems to be running rich, (making the eyes water in fact) this blows my mind because I should be running a bit lean if anything.

    Any thoughts????? I know that when your running just headers you seem to have a chopier idle but I cant se it causing this much of a chop. Plus I think the timing has something in common with it..... By the way... I am not seeing any knock retard.

    I am going to install my 60-lb injectors soon as well as my exaust, Does anyone have any idea of my horsepower numbers????? How about a 1/4 mile time???
    I am running a auto with an aluminum driveshaftm and 3.73's on a Eaton Posi, plus I am using all BMR chassis components so I believe I am like 60-70 lbs lighter than stock, but I will be installing a Chromoly Wolf 6-Point cage. I also have 2-stages of NOS... a 150 wet-shot progressively controlled, and a 100-dry shot button activated.
    Any help is great guys!!!
    One more thing... When I started it up I didnt see any oil pressure for like 10 seconds.... This to me was a little alarming... After that the oil pressure seems a bit lower than normal and it seems a little eratic.

  2. #2
    member since may 2000 nhraformula's Avatar
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    you need to get the a/f ratio.
    ideally it should be a flat 13.
    the flowmaster is going to choke some h.p. its one of the worst flowing catbacks out there.
    being that youre an automatic, you should have a stall converter, no less than 3000 rpm.
    n/a you will have about 370- 380 rwhp
    2000 nhra edition formula
    a few bolt ons, 379 rwhp
    11.96 @113.25

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    Slow'er'Ass Mr. Luos's Avatar
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    60 pounds injectors??

    Those seem huge for the set-up. Although I am not versed on what nitrous requires for fueling.
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    Quote Originally Posted by nhraformula
    you need to get the a/f ratio.
    ideally it should be a flat 13.
    the flowmaster is going to choke some h.p. its one of the worst flowing catbacks out there.
    being that youre an automatic, you should have a stall converter, no less than 3000 rpm.
    n/a you will have about 370- 380 rwhp
    That sounds about what I thought I could see...... I have seen similer build-ups with a slightly milder cam in mags and they were runnig 400 at the flywheel, so I should be seeing about 410-420 at the flywheel.
    I am also lowering my car so what do you think about running true duals all the way back???

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    Slow'er'Ass Mr. Luos's Avatar
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    My car is dropped with the Eibach ProKit and I easily run custom 3" duals.

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    Quote Originally Posted by Mr. Luos
    60 pounds injectors??

    Those seem huge for the set-up. Although I am not versed on what nitrous requires for fueling.

    I was nearly maxing out my injectors without nitrous and just some simple bolt-ons, but with the nitrous I was seeing constant 100% duty cycle and some leaning out under high RPM loads.
    These injectors were not ment for this set-up but I am using them anyway... I also am building a 427 LS1 that will make about 800+ HP plus Nitrous

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    Quote Originally Posted by Mr. Luos
    My car is dropped with the Eibach ProKit and I easily run custom 3" duals.
    I too have the Eibach kit, Where did you get your exaust from??? How is it routed??? Any Pics??? Have you seen the one on EBAY??? Its pretty sweet sounding.

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    Member Capster78's Avatar
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    No headwork?? Will the stock valves be okay spraying that kinda shot?

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    Quote Originally Posted by Capster78
    No headwork??
    Not yet, Im holding off on the heads since I will need to buy a set for my 427 LS1 im building
    So far valves have been fine..... Im running the NOS a little rich to prevent any burnt valves

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    Slow'er'Ass Mr. Luos's Avatar
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    My duals are routed in the factory location.
    Local shop called Exhaust Pros.
    It isn't mandrel bent. Wasn't a huge problem for me. Took some serious tight fit to make it through my tunnel braced torque arm.
    Click for full size
    Click for full size

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    Here is the exaust im thinking of getting but I am unshure if my lowered car will clear sufficiently.
    http://cgi.ebay.com/ebaymotors/98-02...temZ8058758789

    Check out the video.... Sweet!!

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    Quote Originally Posted by Mr. Luos
    My duals are routed in the factory location.
    Local shop called Exhaust Pros.
    It isn't mandrel bent. Wasn't a huge problem for me. Took some serious tight fit to make it through my tunnel braced torque arm.
    Click for full size
    Click for full size
    Wow.... That is some serious tight fitting!!

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    Does anyone else have any input on any of my other problems???
    Thanks for all help guys!!!

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    You're in serious need of a tune for sure.

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    Quote Originally Posted by 0rion
    You're in serious need of a tune for sure.
    yeah I know.... Do you have any comments on my rough idle???? Is it the lack of a tune or the Cam itself???

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    member since may 2000 nhraformula's Avatar
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    Quote Originally Posted by CamaroCrazyChris
    That sounds about what I thought I could see...... I have seen similer build-ups with a slightly milder cam in mags and they were runnig 400 at the flywheel, so I should be seeing about 410-420 at the flywheel.
    I am also lowering my car so what do you think about running true duals all the way back???
    im talking rear wheel h.p.
    with a slightly bigger cam im making 379 to the rear.

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    Right... that was what I was saying....

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    member since may 2000 nhraformula's Avatar
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    Quote Originally Posted by CamaroCrazyChris
    yeah I know.... Do you have any comments on my rough idle???? Is it the lack of a tune or the Cam itself???
    both.
    you really need a stall for the cam in youre car to be taken advantage of.
    also for N20, you didnt really get the best cam.

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    Yeah, I realized this before I ordered it... I went with it though because I dont plan on using the N2O all that often, and so I was mainly looking for a cam for natural asperation. The main batch of my mods is intended for the 427 I am building, I am still about a year and $7000 away from being finished so I wanted a little more power for now and got a cam, then I figured while I was at it I might as well beef up the rest of the valvetrain.

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    I plan on using this cam in my 427 when its done, so it should act milder with the added cubes, I will also be using a 2800 Stall converter when its done... That at first sounds low but you need to remember that its seriously stroked so I should have gobs of torque down low, therfore I wouldnt need an excessively high stall converter.
    Thanks for all your input.

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