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Thread: S52 highest recorded whp for a blower?

  1. #1
    Join Date
    Aug 2009
    Location
    Rochester Hills MI
    Posts
    3,576
    My Cars
    98 M Rdstr

    S52 highest recorded whp for a blower?

    I am trying to remember the highest number I had ever seen for a blower setup on an S52. I keep seeing 517whp in my head.

    I think I will be close.

    Here is what I had:

    Vortech V2 S-Trim, 8 rib pulley 3.33" pulley

    RMS aftercooled with a Terminator Mustang heat exchanger

    CES cutring gasket/ARP hardware(stock compression)

    Turner shorty headers, SuperSprint catback, Mike(MaxPSI) made Vibrant center section and cats

    M50 manifold, Riot Racing BBTB

    Blower Cams by VAC

    803 Maf, 42lb injectors and Walbro 255lph pump

    Nick G tune


    This setup did 400whp/317tq

    What I have done now:

    The Vortech was sent to Jon Bond for full rebuild and had a billet impeller installed. Builder says this is flowing to support 725hp
    22RPD SuperCharger Tune kit, tune, 80lb injectors, MAF
    APE FlexFuel Module
    Walbro 485lph pump
    Aeromotive Adj FPR
    Rally Road oil cooler cap and Setrab oil cooler
    CES Copper gasket spacer, drops me from 10.5:1 to 9:1
    I have a 2.65" and a 3.15" pulley to try out

    I am thinking 15psi on pump, 18psi on e85. If this isn't cracking 500whp on E85 something is very wrong.

    Please don't reply how I should start over with a turbo. I have 0-interest. I have other turbo cars in my stable that make 28lbs of boost at 2500rpms, I enjoy the power delivery, feel and sound of this setup. BUT I want to maximize the potential of the hardware.


    [img]
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    [img]http://spcarsplus.com/piwigo/_data/i...6dae02a-me.jpg[/img]
    [img]http://spcarsplus.com/piwigo/_data/i...7094fbc-me.jpg[/img]
    [img]http://spcarsplus.com/piwigo/_data/i...739a13a-me.jpg[/img]
    [img]http://spcarsplus.com/piwigo/_data/i...74af9ea-me.jpg[/img]
    Last edited by Jamesons Viggen; 03-30-2020 at 01:29 PM.

    '98 RMS stage 2+++++(491whp/390tq VAC cams, CES Cutring-9:1, Built blower, Meth etc)
    '09 Saab 9-5 Combi 5mt 1 of 1(Built Motor, Brembos, LSD, the works!)
    '22 Cadillac CT4-V BlackWing 6mt
    '22 Cadillac CT4 2.0T Sport AWD (wife's)

  2. #2
    Join Date
    May 2002
    Location
    SW Florida
    Posts
    12,681
    My Cars
    99-01 M Cpe & Rdts, X5M
    We seem to be progressing backwards...


  3. #3
    Join Date
    Aug 2009
    Location
    Rochester Hills MI
    Posts
    3,576
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    98 M Rdstr
    Quote Originally Posted by Randy Forbes View Post
    We seem to be progressing backwards...

    I am more optimistic, that looks like progress to me! 10.5:1 was going to be a horsepower road block

    '98 RMS stage 2+++++(491whp/390tq VAC cams, CES Cutring-9:1, Built blower, Meth etc)
    '09 Saab 9-5 Combi 5mt 1 of 1(Built Motor, Brembos, LSD, the works!)
    '22 Cadillac CT4-V BlackWing 6mt
    '22 Cadillac CT4 2.0T Sport AWD (wife's)

  4. #4
    Join Date
    Jun 2005
    Location
    New England
    Posts
    25,402
    My Cars
    F90 M5; E36 M3 Turbo
    It’s not a road block when E85 is used.

  5. #5
    Join Date
    Aug 2009
    Location
    Rochester Hills MI
    Posts
    3,576
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    98 M Rdstr
    Quote Originally Posted by pbonsalb View Post
    It’s not a road block when E85 is used.

    I have a full E85 setup. 22RPD said though with 10.5:1 they don't push it past 15psi on e85 and 11psi on pump. with 9:1, they've run as much as 21psi and 550-600whp.

    '98 RMS stage 2+++++(491whp/390tq VAC cams, CES Cutring-9:1, Built blower, Meth etc)
    '09 Saab 9-5 Combi 5mt 1 of 1(Built Motor, Brembos, LSD, the works!)
    '22 Cadillac CT4-V BlackWing 6mt
    '22 Cadillac CT4 2.0T Sport AWD (wife's)

  6. #6
    Join Date
    Jun 2005
    Location
    New England
    Posts
    25,402
    My Cars
    F90 M5; E36 M3 Turbo
    If you are on a stock block, those limits make sense for stock compression with a centrifugal. The drag on the crank does stress the motor. With a centrifugal, I ran 13-14 on 93 pump plus meth, then changed to a 0.098 MLS and ran 16-17 on 93 pump plus meth. Have not played with E85 because the nearest is 75 miles away unless I buy expensive drums and pump my own.

    With a turbo, people run more than 15 psi on E85 with 10.5, but the stock block becomes a limitation. Turbos makes way more torque, which can bend stock rods. And stock pistons have ring gaps a little on the tight side for high boost. If you are up for a little more work, opening up the ring gaps could help your motor survive if you plan to push it to the limit.
    Last edited by pbonsalb; 04-07-2020 at 11:42 AM.

  7. #7
    Join Date
    Aug 2009
    Location
    Rochester Hills MI
    Posts
    3,576
    My Cars
    98 M Rdstr
    Quote Originally Posted by pbonsalb View Post
    If you are on a stock block, those limits make sense for stock compression with a centrifugal. The drag on the crank does stress the motor. With a centrifugal, I ran 13-14 on 93 pump plus meth, then changed to a 0.098 MLS and ran 16-17 on 93 pump plus meth. Have not played with E85 because the nearest is 75 miles away unless I buy expensive drums and pump my own.

    With a turbo, people run more than 15 psi on E85 with 10.5, but the stock block becomes a limitation. Turbos makes way more torque, which can bend stock rods. And stock pistons have ring gaps a little on the tight side for high boost. If you are up for a little more work, opening up the ring gaps could help your motor survive if you plan to push it to the limit.
    I am lucky to have multiple E85 options within 1-5 miles.

    When bone stock I ran about 13psi. At MaxPsi, once the cutring was in, they found with no meth and pumpgas, 11-12psi was about the max. Now I have the CES spacer dropping me to 9:1 and a full E85 setup. I don't want any restrictions keeping me from 500whp and now I could even hit that without the E85. The engine only has 90k and looks to be in nice shape(cross hatching evident for example). One day as the miles get up there, sure, I'll pull the motor and do forged pistons and rods and take it a step further.

    '98 RMS stage 2+++++(491whp/390tq VAC cams, CES Cutring-9:1, Built blower, Meth etc)
    '09 Saab 9-5 Combi 5mt 1 of 1(Built Motor, Brembos, LSD, the works!)
    '22 Cadillac CT4-V BlackWing 6mt
    '22 Cadillac CT4 2.0T Sport AWD (wife's)

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