Results 1 to 8 of 8

Pre-cam mods: How's this?

This is a discussion on Pre-cam mods: How's this? within the External Engine forums, part of the LSx Technical Help Section category; I have a 1998 Z28 with 80k miles on it and thanks to a fat insurance settlement it's going to ...

  1. #1
    Junior Member
    Join Date
    Sep 2005
    Location
    owasso ok
    Age
    32
    Posts
    66

    silver
    1998 z28

    Pre-cam mods: How's this?

    I have a 1998 Z28 with 80k miles on it and thanks to a fat insurance settlement it's going to have some new life breathed into it. I plan on running a real aggressive cam, along the lines of the magic stick or similar. My goal is 400+ rwhp. I am going to put on Pacesetter LT headers, lid and an LS6 intake. I have a cutout on my stock exhaust right now. Is it necessary to run an aftermarket catback exhaust if I'm running an open cutout? I've been told with boltons that an open cutout will flow enough, but I wasn't sure if it'd be enough with a cam like the magic stick. If I need a catback, should I just go with a catback system from a sponsor, or should I run a custom dual setup? Any other tips on what mods I should run before running a cam? If you can think of another cam option (this IS a daily driver) that will get me 400-430hp rwhp go ahead and list them as well.

    *Please do not tell me to do suspension stuff first to get the power to the ground, I don't usually race it from a dead stop, it's usually a roll or more so I'm not worried about traction issues (yet). Thanks guys

  2. #2
    Member keliente's Avatar
    Join Date
    Aug 2005
    Location
    Charlotte, NC
    Age
    33
    Posts
    723
    99 Firebird Formula

    Nothing will flow better than a cutout, think about it, there is no restriction. However a good exhaust like magnaflow/gmmg/borla wouldn't hinder it unnecessarily if you do decide you'd like a catback. Normally when we see cars go up on the dyno and open the cutouts, the gain is anywhere from 4-8hp.

    You can get any kind of exhaust you like, it doesn't matter.

    The mods you listed are a good warm-up for a cam. Lid, Headers, LS6 intake, cutout will get the air moving like it should be. When you decide on a cam don't forget springs, pushrods, timing chain, and all the good stuff like that. A tune will also help you maximize your gains.

  3. #3
    member since may 2000 nhraformula's Avatar
    Join Date
    Dec 2002
    Location
    n/w chicago
    Age
    47
    Posts
    6,933

    black
    2000 nhra edition formula

    cut outs get old after awhile. the drone is enough to drive a person nuts.
    2000 nhra edition formula
    a few bolt ons, 379 rwhp
    11.96 @113.25

  4. #4
    Senior Member mrr23's Avatar
    Join Date
    Jul 2005
    Location
    orlando, fl
    Posts
    7,134

    dark bowling green
    2000 corvette

    Quote Originally Posted by keliente
    Nothing will flow better than a cutout,
    really?? that's a pretty definitive statement. guess i should've left mine on. a cutout is helpful, yes. but doesn't offer the scavenging that a complete, well designed exhaust system can offer?

    in my particular instance, my car lost .1 in the 60ft and gained 1 mph at the 1/4. this netted me an overall gain of .02 in the 1/4 mile. and this was on 136 rwhp n2o. also, the cutout did gain me 11/13 on the dyno. unfortunately, the dyno doesn't show you the loss under 3000 rpms.

    Now here's results of my exhaust endeavors. This is with 136 rwhp n2o. the stock vs cutout was same day.

    distance --- stock --- cutout --- cutout colder --- Bassani
    60ft ------ 1.987 ----- 2.074 ------- 2.020 --------1.969
    1/8 ------- 7.902 ----- 7.912 ------- 7.990 ------- 7.739
    mph ------ 93.20 ----- 93.97 ------- 92.16 ------- 98.60
    1/4 ------ 12.102 ---- 12.080 ------ 12.191 ------ 11.814
    mph ----- 117.12 ---- 118.06 ------ 118.20 ------ 121.35


    NA times

    distance --- stock --- cutout --- cutout colder --- Bassani
    60ft ------- 2.033 ---- 2.073 ---------- 2.031----- 2.044
    330ft ------ 5.788 ---- 5.822 ---------- 5.759 ----- 5.723
    1/8 -------- 8.808 ---- 8.833 ---------- 8.729 ----- 8.656
    mph ------- 82.33 ---- 82.55 ---------- 83.70 ----- 84.27
    1000ft ---- 11.404 ---- blank --------- 11.278 ---- 11.196
    1/4 ------- 13.606 --- 13.636 -------- 13.449 ----- 13.345
    mph ------ 101.66 ---- 101.58 -------- 104.05 ---- 105.15

  5. #5
    Senior Member mrr23's Avatar
    Join Date
    Jul 2005
    Location
    orlando, fl
    Posts
    7,134

    dark bowling green
    2000 corvette

    Quote Originally Posted by nhraformula
    cut outs get old after awhile. the drone is enough to drive a person nuts.
    yes it does.

  6. #6
    Senior Member mrr23's Avatar
    Join Date
    Jul 2005
    Location
    orlando, fl
    Posts
    7,134

    dark bowling green
    2000 corvette

    Quote Originally Posted by keliente
    You can get any kind of exhaust you like, it doesn't matter.
    not trying to pick on you, but it does matter.

    going from borla 3" adjustable to bassani tru-duals with x-pipe did this on the wife's car. both on stock tune as well.


  7. #7
    Local Bum TARZAN's Avatar
    Join Date
    Aug 2005
    Location
    Memphis Area
    Age
    33
    Posts
    1,258
    Cobra, Z28, GN, F250

    I'd suggest gettin a muffler welded in the stock catback, at the very least....

    -Will

  8. #8
    Junior Member
    Join Date
    Sep 2005
    Location
    owasso ok
    Age
    32
    Posts
    66

    silver
    1998 z28

    Thanks guys

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. 15 Cheap Mods - 15 No-Buck And Low-Buck Mods
    By Ed Blown Vert in forum Firebird / WS6
    Replies: 0
    Last Post: 03-05-2012, 05:20 PM
  2. 2004 Cobra w/mods Vs. R34 Skyline w/mods
    By Packy in forum Kill Stories
    Replies: 88
    Last Post: 08-31-2009, 07:26 PM
  3. Question: Mods
    By repeter in forum GTO
    Replies: 1
    Last Post: 02-15-2009, 02:00 PM
  4. Question: doing mods
    By cramn4903 in forum Camaro / SS
    Replies: 9
    Last Post: 02-09-2009, 06:18 PM
  5. $2000 on suspension mods or on motor mods??
    By greatwhiteZ28 in forum Suspension and Handling
    Replies: 6
    Last Post: 09-27-2007, 07:04 AM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •