Page 6 of 6 FirstFirst ... 3456
Results 76 to 83 of 83
  1. #76
    Senior Member 46Crab's Avatar
    Join Date
    Feb 2017
    Location
    Melbourne
    Posts
    794

    Default

    Quote Originally Posted by gtrboyy View Post
    Sounds like 80's-90's combinations before efi heads & ls engines...ol' avgas monsters

    Red/blue blocks either 308 or 330 strokers
    11.5:1 or higher back when eating head gaskets were common.
    ported paper thin red heads & hogged out torkers

    Either had a toploader or auto with big slipping stally 4.3 gears on 26' slicks was usual trick...revved to the moon low 11's or high 10's.

    Grumpiest sounding engines at track with sweet avgas smell.
    old school and angry as f$&k

  2. #77
    Do you ever leave? immortality's Avatar
    Join Date
    May 2010
    Location
    NZ
    Posts
    3,285

    Default

    I miss avgas.

  3. #78
    casual poster
    Join Date
    Sep 2011
    Location
    perth
    Posts
    335

    Default

    Quote Originally Posted by gtrboyy View Post
    Sounds like 80's-90's combinations before efi heads & ls engines...ol' avgas monsters

    Red/blue blocks either 308 or 330 strokers
    11.5:1 or higher back when eating head gaskets were common.
    ported paper thin red heads & hogged out torkers

    Either had a toploader or auto with big slipping stally 4.3 gears on 26' slicks was usual trick...revved to the moon low 11's or high 10's.

    Grumpiest sounding engines at track with sweet avgas smell.
    miss those days

  4. #79
    in the shed buildin shit 3554me's Avatar
    Join Date
    Apr 2008
    Location
    qld
    Posts
    1,366

    Default Holden tests on my superflow dyno, what tests would you like to see?

    288 here you go !

    https://fb.watch/69sznhn8jQ/

    Edit my bad not std stroke sorry
    Sent from my iPhone using Tapatalk
    Last edited by 3554me; 16-06-2021 at 07:41 PM.
    10.28@131.99 on e85 26x10
    10.34@130.66 on e85 255 radial


  5. #80
    Part of the furniture
    Join Date
    Feb 2018
    Location
    Brisbane
    Posts
    946

    Default

    Quote Originally Posted by 3554me View Post
    288 here you go !

    https://fb.watch/69sznhn8jQ/

    Edit my bad not std stroke sorry
    Sent from my iPhone using Tapatalk
    Still the king of the 288 in my books.


    Sent from my iPhone using Tapatalk

  6. #81
    Senior Member JaseQ314's Avatar
    Join Date
    Jun 2015
    Location
    Great South East
    Posts
    558

    Default

    Quote Originally Posted by 3554me View Post
    288 here you go !

    https://fb.watch/69sznhn8jQ/

    Edit my bad not std stroke sorry
    Sent from my iPhone using Tapatalk
    Or early heads but it's still very impressive nonetheless.

  7. #82
    casual poster
    Join Date
    Sep 2011
    Location
    perth
    Posts
    335

    Default

    Quote Originally Posted by struggler View Post
    The experience I have is with the Pacemaker PH5700 pipes.

    Off the shelf they are a Tri-Y with 1 3/4" primaries, 2" secondary pipe and a 2 1/4" collector.

    I cut off the 2 1/4" collector and flared it out to 2 1/2", then used about 18" of straight 2 1/2" pipe as an extension.

    Went off to the dyno and the engine (355, CC288) made about 480 odd HP (this was about 15 years ago !). The dyno operator pulled out his "dyno pipes" which were the same but with a 3" collector and about 10" of extension.

    Well it did make the same power but took a couple of hundred RPM to get there, the torque however was down as much as 20 ftLb !

    Fast-forward to today and he is still using the same pipes ! I had a 355 on his dyno last week that made 527 HP and 471 ftLb with those pipes, would it have made more torque with the 2 1/2" collector ? I don't know but when customers fit the engines in Commodores I always get them to use 2 1/2", at least for the first 12 inches. They will feel the extra 20 FtLb.

    As an aside, I reckon the 1 5/8" pipes are far better on stock stroke engines and mild 355s.

    JMHO.

    P.S. I build a lot of motors with single pattern or minimal extra exhaust duration cams and tight LSA, these engines are fussier when it comes to exhaust than the ones with heaps of exhaust duration and more conventional LSAs.
    i would have to agree, they definitely seem to like the 2 1/2 over the 3inch, this is something i want to explore more on the dyno

  8. #83
    casual poster
    Join Date
    Sep 2011
    Location
    perth
    Posts
    335

    Default

    i have found a good twin 2 1/2 exhaust to be good up to 580-600hp then the 3inch comes into play

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. 355 Vt Dyno Tests
    By MCEcomp in forum Holden V8's
    Replies: 10
    Last Post: 04-02-2009, 08:06 AM
  2. Vacum Readings & Plug Tests
    By Twohungee in forum Ford V8's
    Replies: 4
    Last Post: 14-09-2007, 09:20 PM
  3. Twin Throttle Body Tests.....
    By VR6L in forum Holden V8's
    Replies: 4
    Last Post: 03-01-2007, 11:05 PM

Posting Permissions

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