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Dyno #'s w/HSW 150 wet... runs RICH

This is a discussion on Dyno #'s w/HSW 150 wet... runs RICH within the Nitrous forums, part of the LSx Technical Help Section category; Hey all- Went to the dyno yesterday... 101* and 52% humidity... My NA pull made 316hp 323tq . The A/F ...

  1. #1
    Just another Joe Eagle's Avatar
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    Dyno #'s w/HSW 150 wet... runs RICH

    Hey all-

    Went to the dyno yesterday... 101* and 52% humidity...

    My NA pull made 316hp 323tq. The A/F ratio is a little fat, but its a nice flat line and the car ran well there - any leaner and it looses power.

    My N2O pull made 394hp 486tq... you'll notice no A/F chart on this sheet... because it ran SUPER fat. So fat indeed that the moment the nitrous hit, the A/F #'s fell below 10 and the machine couldn't chart them! With 150HP jets installed, I only increased 78HP and 163TQ.

    Bottle pressure was at 1000psi and it was 101*F in the dyno building.

    With the increased bottle pressure, I'd expect to see it a little lean... not so damn rich that it bogs down the car when the n2o hits (still strong, but I'm leaving 20-30hp on the table I'd bet.)

    I need to jet the fuel down a bit since the A/F is linear and fairly close to correct NA... but falls thru the floor and goes FAT on the juice. Question is, how far do I go? I'm currently running n20=.062 fuel=.034. Wish I could have re-jetted it on the dyno, but that wasn't an option unfortunately. I still dont have a wideband either.

    I'm uploading short vids of each pull to putfile now, I'll post them a bit later.

    -Eagle
    | '02 WS6 M6 | KOOKS/ORY | LC-1 | LOU'S SS | UMI SFCs | BMN LCAs & RELOC's | Hotchkis STB | HSW 150 shot | Lid | 42# Lucas | HPTuner Pro |

  2. #2
    Senior Member Danger731's Avatar
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    Is this a newer HSW kit ?

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    Just another Joe Eagle's Avatar
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    Yes, I bought it in May? of this year. Its the sudden impact wet kit.

    NA pull vid:
    http://media.putfile.com/NA-Dyno-Pull---AFM-Aug-07

    N2O pull vid (listen for the bog right when the window switch goes on):
    http://media.putfile.com/NA-Dyno-Pull-AFM-Aug-07

    -Eagle
    Last edited by Eagle; 08-11-2007 at 03:33 PM.

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    Senior Member mrr23's Avatar
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    if it's under 10:1, i would go down to .031 jet. most companies use 62/32 as a 150 shot.

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    Just another Joe Eagle's Avatar
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    Its definitely under 10... the meter just flat lined at 10 and sat there the entire pull...

    I have a .031 jet handy... I'd want to scan against it tho... its the jet thats supposed to be used for the 125 shot according to the card. What O2 voltage should I expect? Still 890s?

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    Senior Member mrr23's Avatar
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    dark bowling green
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    950-980ish

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    Just another Joe Eagle's Avatar
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    Roger that! Thx mrr!

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    LTX N20LT4's Avatar
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    10's N/A

    Ouch. You should have way more in it than 78hp. I gained 98.2rwhp from a 100-shot (Dyno Tune Kit).

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    Just another Joe Eagle's Avatar
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    I did get quite a bit of torque tho... I'm always looking for the silver lining...

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    Senior Member Danger731's Avatar
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    Fix that A/F, Matt says the new kits are rated RWHP. You got a 50 % loss.

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    Just another Joe Eagle's Avatar
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    Ya I know it, thats my problem! I'm hoping Matt will reply here...

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    Senior Member greatwhiteZ28's Avatar
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    isnt torque the one that really matters thoe, nut high 70's hp, should be more.

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    Senior Member mrr23's Avatar
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    dark bowling green
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    the hp number is a joke. i have been as low as 91 rwhp on a 150, but i finally got it figured out.

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    Senior Member greatwhiteZ28's Avatar
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    is that a new ride for you MRR23 thats on your sig??

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    Senior Member mrr23's Avatar
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    dark bowling green
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    yep. i bought badbluebird car.

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    Just another Joe Eagle's Avatar
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    Congrats on the new ride mrr! Whats the plans for that one?

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    Senior Member mrr23's Avatar
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    dark bowling green
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    want a full out race car. going to gut it out and build a 454 LSX motor for it. always liked the maui blue.

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    LTX N20LT4's Avatar
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    10's N/A

    Quote Originally Posted by mrr23 View Post
    want a full out race car. going to gut it out and build a 454 LSX motor for it. always liked the maui blue.
    Why not '455' for Trans-Am tradition??
    486/438
    10.68/127 N/A


  19. #19
    Senior Member mrr23's Avatar
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    dark bowling green
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    don't feel like honing out the new LSX block for 1 cubic inch.

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    Just another Joe Eagle's Avatar
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    lmao @ 1 cubic inch.

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