Results 1 to 15 of 15

With new cam and ported heads....?

This is a discussion on With new cam and ported heads....? within the Internal Engine forums, part of the LSx Technical Help Section category; With new cam and ported heads, I'm curious what kind of gas mileage are you guys getting? If you could ...

  1. #1
    Junior Member
    Join Date
    Aug 2005
    Location
    Orange County/(Hudson Valley), NY
    Posts
    26

    Black
    '98 WS6 Trans Am

    With new cam and ported heads....?

    With new cam and ported heads, I'm curious what kind of gas mileage are you guys getting? If you could respond with your cam and head specs and then the difference you see in your gas mileage now. Thanks in advance!
    Last edited by BatCar; 08-28-2005 at 12:48 PM.
    Black '98 WS6 Trans AM (A4)

  2. #2
    Grand Imperial Wizard Sarge's Avatar
    Join Date
    Aug 2005
    Location
    Texas Department of Corrections
    Posts
    18,129
    Retired Outlaw Sum Bitch

    Patriot Stage II
    Comp Cam (if I recall) 224ish 585ish 113 LSA
    Bout 15-17 mpg regardless of highway or town....

  3. #3
    Junior Member
    Join Date
    Aug 2005
    Location
    Orange County/(Hudson Valley), NY
    Posts
    26

    Black
    '98 WS6 Trans Am

    TTT....thanks Sarge. Anyone else?...Is there a big difference from what you were getting before?

  4. #4
    Awaiting Activation Liquifire's Avatar
    Join Date
    Aug 2005
    Location
    central wisconsin
    Age
    39
    Posts
    702
    the heads will make it drop a couple of MPG but the big difference is how big of a cam you have and who tunes it and how it is driven.

  5. #5
    outlawz01
    Guest
    comp cam 595/609 112 lobe horrible city still pretty good highway just stick it in 6th and cruze.

  6. #6
    Smog Technician Irman393's Avatar
    Join Date
    Aug 2005
    Location
    Oakland/Alameda
    Age
    31
    Posts
    44

    green
    99 camaro

    hey sarge what kind of power are you puting down with ur heads and cam??i was thinking with going with that setup

  7. #7
    BlackHawk T/A
    Guest
    Also note a higher stall will affect your gas mileage too - often done with a cam (if A4).

  8. #8
    Awaiting Activation Liquifire's Avatar
    Join Date
    Aug 2005
    Location
    central wisconsin
    Age
    39
    Posts
    702
    Quote Originally Posted by outlawz01
    comp cam 595/609 112 lobe horrible city still pretty good highway just stick it in 6th and cruze.
    He doesnt have sixth.......his car is an A4. What kind of numbers do you put down??

  9. #9
    Member
    Join Date
    Aug 2005
    Location
    any where but here
    Posts
    142
    AFR 205 heads
    Comp Cam 220ish & 532ish (mild) & (borrowed the ish denotation from Sarge)
    114 LSA
    A4 w/ stock torque converter (Think it's 1,800 RPM?)

    16-18 MPG generally unless I'm leadfooting it.

  10. #10
    Grand Imperial Wizard Sarge's Avatar
    Join Date
    Aug 2005
    Location
    Texas Department of Corrections
    Posts
    18,129
    Retired Outlaw Sum Bitch

    Quote Originally Posted by Irman393
    hey sarge what kind of power are you puting down with ur heads and cam??i was thinking with going with that setup
    On all motor a little over 400RWHP (Mustang Dyno)
    With the new Nitrous...well over 500RWHP....
    I do not want to mislead nor set any false expectations....I have a helluva lot more than Heads/Cam....Balanced crank/LSX Intake/KN CAI/Shaner TB/SW LT Headers/RT Cats/Borla Performance Exhaust/Valves/Springs/Rods etc. etc. And of course a dyno tune by the best in the business...Tracy at FIS....all that going through a TransGo shift kit/PI 3200 Stall/Harrop finally to Nitto Drag Radials....

  11. #11
    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

    Quote Originally Posted by BlackHawk T/A
    Also note a higher stall will affect your gas mileage too - often done with a cam (if A4).
    a stall converter will really put a shitter to mpg in big cities in traffic.
    2000 nhra edition formula
    a few bolt ons, 379 rwhp
    11.96 @113.25

  12. #12
    outlawz01
    Guest
    Oh my bad. I put down 411/424. On a shitty tune. Hopefully i will get it tuned soon.

  13. #13
    Junior Member
    Join Date
    Sep 2005
    Location
    Fort Stockton, Tx
    Age
    35
    Posts
    39

    Blue
    2000 Z-28

    MTI Stage 2 heads
    MTI X1 Cam- 591/571 230/227 112 lobe separation
    3500 Stall

    city 13-16
    highway 19-22

  14. #14
    Rhino21149
    Guest

    Fuel Econmy tests on modified LS

    I have two modified LS engine cars.

    98 Camaro with 408 iron-block with big-port AFR heads, 11.25:1, 250ish deg cam, lift about .65, 113 deg sep; headers, cats and mufflers, good tune, 490/522 RWHP on fuel alone with cutouts closed/open,.

    Fuel usaghe about 14 around town, 22-24 on the highway.

    02 Z06: We've actually gone to some effort to test this carefully.

    Engine: 427 C5R block, Patriot III heads with porting+polishing by Justin (flow 342 on intake), 225/232 deg cam with .594 lift, FAST90mm, 1 7/8 long tube headers, big cats, 3" exhaust, etc., and D1SC SC set for mild boost (5 lbs),
    Very good tune for driveability and low-end torque. Max 565 RWHP/544RWT with cutouts closed, 595/550 with them open.

    Around town I get about 19, on the highway, generally 25.

    It gets very good mileage because it is a pretty mild cam for such a big engine.

    Fuel Economy, by actual test, two way, using the cars "Avg Fuel Econmy" feature over 3 and 5 mile sections, two way average (usually several two-way runs averaged, except the 125 mph run, done only once).

    MPH W AC off W AC on
    20 18 14
    35 26 25
    40 30 27-28
    60 29 26-27
    75 26 24
    85 21 19
    100 19 17
    125 15 13-14

  15. #15
    Impounded eddierox's Avatar
    Join Date
    Aug 2005
    Location
    alabama
    Posts
    1,800

    Black
    2004 Z06


Thread Information

Users Browsing this Thread

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

Similar Threads

  1. 799 Ported Heads ONLY on an LS1
    By BBATCAR in forum Internal Engine
    Replies: 5
    Last Post: 09-06-2013, 08:57 PM
  2. AFR heads VS. Ported and beefed up stock heads.
    By hutcher04 in forum Internal Engine
    Replies: 10
    Last Post: 03-14-2010, 09:27 AM
  3. LS1 Ported Heads
    By 94 Formula in forum Parts For Sale / Trade
    Replies: 2
    Last Post: 10-25-2009, 09:55 PM
  4. F/S Ported 6.0 heads
    By knappo_99 in forum Parts For Sale / Trade
    Replies: 15
    Last Post: 07-30-2008, 05:59 PM
  5. AFR heads vs Patriot Heads.. CNC ported
    By WARP211 in forum Camaro / SS
    Replies: 6
    Last Post: 03-01-2007, 09:51 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
  •