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Thread: What mods for 300 HP

  1. #1
    Join Date
    Mar 2004
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    896

    What mods for 300 HP

    I was wondering what a list of mods would look like to achieve 300HP at the motor. Without doing a ported blower and the big mods is it possible to get 300HP?


    Current list of mods:

    BHJ Balancer
    ASP 10% Pulley
    Full Magnaflow Exhaust
    Mac CAI
    Taylor 8mm Wires
    Iridium plugs
    SCI Jackshaft Pulley
    180 Thermostat

  2. #2
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    Feb 2003
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    At the motor. Ya I would think about all the bolt ons minus the MP blower would get you there. MAF, t-body, exhuast, pulleys, double ic, sc top, cai.

  3. #3
    Join Date
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    Bayarea, CA
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    Heres what Bill at SCP sells as his "300HP" Package, can be found here:http://www.supercoupeperformance.com/HP%20Packages.htm
    Not sayin that will actually get you 300HP but its an idea of where to start with. Also does not include any sc porting, just boltons. Goodluck on your quest to 300hp. Zach

  4. #4
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    Look at the list of top most powerful SC's by horsepower, and see who is above 300 hp. I doubt you'll see any cars with only boltons. Head porting is pretty much required to get to that power level, although the stock bottom end and cam should be OK.

  5. #5
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    Quote Originally Posted by Rob Noth
    Look at the list of top most powerful SC's by horsepower, and see who is above 300 hp. I doubt you'll see any cars with only boltons. Head porting is pretty much required to get to that power level, although the stock bottom end and cam should be OK.
    That list would be HP at the wheels, though, not at the motor.

    Dale

  6. #6
    Join Date
    Apr 2002
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    A van down by the river.
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    Oops, guess I didn't read that question close enough.

  7. #7
    following info from: Apten Performance

    Suggested Modifications
    We have put hundreds of hours into the development of Thunderbird SC products and finding out which combinations work best. After significant time at the dyno, we have come up with this list of suggested modifications. We realize there may be other aftermarket parts you can add, but these are the ones we have found to be most effective.

    First stage: Basic Bolt-ons
    Following these will get your SC up in the 210-220RWHP Range. They are listed in the order we suggest

    1. Cat-Back Exhaust System
    2. Magnum Powers Intake kit
    3. 5% Overdrive Pulley
    4. Computer Chip

    Second Stage: Extensive Bolt-ons
    Putting all of these together with the first stage will get your car safely past 250RWHP

    1. Magnum Powers MPII Supercharger
    2. Magnum Powers Supercharger Plenum
    3. Magnum Powers 85MM Throttle Body
    4. Pro-M 76MM or 87MM MAF, and 42lb injectors (with chip reburn)
    5. 255lph aftermarket fuel pump
    6. Magnum Powers Raised Top
    7. Magnum Powers FMIC Intercooler Kit

    Third Stage: Pure Power
    This is the final step to making power with available parts. Once you have done everything in these three lists, you should have a 12 second capable 300RWHP car. At these power levels, you will have to be sure that your transmission capable of handling the power. In some cases, a stronger engine with forged pistons and rods may be necessary. We have seen stock super coupe pistons and rods make over 400BHP, but the car needs to be tuned or atleast dyno tested for that power to last.

    1. Stiegemeier complete cylinder heads
    2. Stiegemeier Camshaft
    3. Ported Exhaust Manifolds
    4. Chip reburn with dyno pulls

    Notes on Other Modifications
    Here is a list of other modifications, and our notes on them.

    Headers
    While headers may be a benefit on some motors, they are not one of the first modifications I would do on a super coupe. We have found that porting the stock manifolds is adequate for cars running 300RWHP and even slightly beyond. If you aren't looking for the MAX power available from your super coupe, we would suggest saving the cost of headers and putting that money into something of the other modifications we listed above. When you are all done with the things we listed, you can always add that if your car doesn't meet the goals or if you want to make even more power.

    MAF Meters
    We recommend two brands for replacement MAFS. The only two companies we recommend are Ford and Pro-M (Also known as Granitelli). Upgrading your MAF will be necessary when you have added most of the parts in our second stage of modifications. The factory air meter is restrictive, and will not flow enough air in the usable voltage range to be effective on high HP SC's. Three common Air meters are the ProM 76MM, ProM 87mm, and Ford 90MM Lightning MAF. All of them will work well on cars up to 400RWHP. We recommend having the chip reburned when you change air meters and injectors. Never, EVER modify your stock MAF by cutting out the center post. Doing so will change the flow characteristics, and cause the electronics to send false signals to the computer. We support cars with C&L meters, but we recommend the Pro-M meters above them because we feel the Pro-m meters are more accurate..

    Fuel Injectors
    1989-1993 Super Coupes come with 30lb injectors, while 1994-1995 Super coupes come with 36lb injectors. When you get into the second stage of modifications, you should have at least 36lb injectors. Depending on your power levels, it may be necessary to have 42lb injectors.

    Supercharger Overdrive pulleys
    On lightly modified Super Coupes, we only recommend a 5% overdrive pulley. Using a smaller pulley could result in premature head gasket failure. If you have high flowing exhaust and a ported supercharger, you can step up to a 10% overdrive pulley. We have observed that overdriving the supercharger more than 10% may decrease HP. Spinning the Eaton M90 too fast will cause excessive heat, which will result in a power loss.

    Intercoolers
    By far, the most efficient intercooler available in kit form is the Magnum Powers Front Mount Intercooler. It not only cools better, but it also has less pressure drop than the stock intercooler and tubing. If the Front Mount Intercooler is out of your budget, you can commonly find homemade double intercoolers online for around $600. At the dyno we saw nearly a 20HP gain by swapping a Front Mount intercooler in place of a double intercooler.

    Radiators
    For most cases, you won't need an upgraded radiator until you get well into the third stage of modifications. It really depends on your climate and driving habits. The chip will help cool the car significantly by itself because it lowers the fan turn-on temperatures.

    Cylinder Heads and Camshafts
    Depending on what your goals are, good flowing cylinder heads may be critical. The difference between the heads we sell and your basic ported heads with valves is in the flow. You want heads that flow good on the exhaust port, and also at low valve lifts. If you want to run a 12 second Super Coupe or faster, you should consider investing in a set of these heads. It is also important to have a custom camshaft made based on the flow characteristics of the heads. Aggressive camshafts that lift past .600 will also require some special springs that will not bind at high lifts.

    Underdrive pulleys
    While gains can be made with Underdrive pulleys, we left them off the list of important modifications. We did this because we feel that the gains from those pulleys are somewhat small compared to the cost. If you figured out the dollar cost per HP, it would be higher with underdrive pulleys than most of the other things we suggested. If you have done everything else we suggested and still cannot reach your goals, that might be the time to look to underdrive pulleys for additional gains.

    Cold Air Intake Kits
    There are several aftermarket cold air kits to choose from. There are two important things to look at when making a purchase decision on these. First, you want to be sure there are no bends in front of the MAF meter. Some intake kits available have a large bend in the tubing in front of the MAF meter. That bend will cause turbulence in the air, which will give your MAF inaccurate readings. This can cause a drivability problem, as well as a lean condition. The second considerations is that your intake kit pull cold air. Some intakes have conical filters inside the engine bay with no cold air divider. This will cause the filter to suck in warm engine air while you are driving. The warmer air entering the intake will result in a loss of power. Super Coupe performace makes a good air intake kit that works well.
    Back to Top

    Cars and Dyno Results
    Below is a list of Super Coupes that we have recently tuned, along with information on the car and the dyno data.

    Chris Wise - 1990 Thunderbird SC Auto
    391RWHP / 481RWTQ 11.91 @ 114MPH
    4.2L Forged V6. 50lb injectors, 90MM Lighting MAF,
    ported and welded heads, Camshaft, custom liquid I/C,
    Custom I/C tubing, MP Plenum, 85mm TB, Ported M90,
    Complete Exhaust, custom fuel system, Apten Chip, and more


    Dave Neibert - 1991 Thunderbird SC Auto
    374RWHP / 461RWTQ 12.5 @ 109MPH
    3.8L Forged V6. 50lb injectors, Pro-M 87mm MAF,
    ported and welded heads, Camshaft, MP FMIC, Apten Chip,
    MP Plenum, MP Supercharger, 85mm TB, Complete Exhaust,
    and more


    Bill McNeil - 1993 Thunderbird SC 5-speed
    360RWHP / 413RWTQ
    3.8L Forged V6. 42lb injectors, 90mm Lightning MAF,
    Morana Ported heads, Camshaft, Double Intercooler, Apten Tuner file,
    MP Plenum, MP Supercharger, 85mm TB, Complete Exhaust,
    and more


    Anthony Rongo - 1992 Thunderbird SC Auto
    348RWHP / 365RWTQ
    Factory 3.8L short block. 42lb injectors, 90MM lightning MAF,
    stiegemeier heads and Camshaft, MP FMIC, Apten Chip,
    MP Plenum, MP Supercharger, 85mm TB, Complete Exhaust,
    and more


    Gary Kuhn - 1991 Thunderbird SC 5-speed
    340RWHP / 391RWTQ
    3.8L Forged V6. 42lb injectors, 90mm Lightning MAF,
    Stiegemeier heads and Camshaft, custom FMIC, Apten Chip,
    MP Plenum, ESM Supercharger, 85mm TB, Complete Exhaust,
    and more


    Tony Serno - 1994 Thunderbird SC Auto
    332RWHP / 380RWTQ
    Factory 3.8L shortblock. 42lb injectors, 90mm Lightning MAF,
    Stiegemeier heads and Camshaft, MP FMIC, Apten Chip,
    MP Plenum, MP Supercharger, 85mm TB, Complete Exhaust,
    and more


    Chris Mendola - 1995 Thunderbird SC Auto
    316RWHP / 404RWTQ
    3.8L Forged V6. 42lb injectors, 90MM Lightning MAF,
    Stiegemeier Heads, Camshaft, complete exhaust, Apten Chip,
    2.2L Autorotor supercharger with custom built intake,
    laminova liquid intercooler, and water cooling system


    Kurt Kriesz - 1990 Thunderbird SC Auto
    316RWHP / 378RWTQ
    Coy Miller Stage II heads, forged short block. 42lb injectors, Pro-M 87mm MAF,
    Spearco Intercooler, Apten Chip, S-model supercharger,
    MP Plenum,70mm TB, Complete Exhaust,
    and more


    Chris Spanel - 1994 Thunderbird SC Standard
    303RWHP / 378RWTQ 13.7 @ 104MPH
    42lb injectors, 90MM Lightning MAF, Stiegemeier Heads,
    Camshaft, complete exhaust, Underdrive pulleys, Apten Chip,
    ported exhaust manifold, raised SC top


    Rodney Bushong - 1992 Thunderbird SC Standard
    291RWHP / 378RWTQ 13.7 @ 104MPH
    42lb injectors, 76mm ProM MAF, ported heads, Camshaft,
    complete exhaust, Magnum Powers FMIC, MP supercharger, Apten Tune,
    Magnum powers plenum, Magnum powers Intake tube


    Todd Jelle - 1990 Thunderbird SC Auto
    291RWHP / 378RWTQ 13.0 @ 106MPH
    42lb injectors, 76mm C&L MAF, CMRE Stage II Engine,
    S-Model supercharger, Spearaco Intercooler, MP plenum
    Apten Tune, and more...

  8. #8
    Join Date
    Mar 2003
    Location
    Noble, Ok
    Posts
    375

    Talking

    ALright a list I can go by.lol

  9. #9

    Thinking of price so I looked everything up

    Item ------
    priced from www.....
    amount $

    1. Cat-Back Exhaust System
    Super Coupe Performance
    $740

    2. Magnum Powers Intake kit
    Magnum Powers
    $165

    3. 5% Overdrive Pulley
    Super Coupe Performance
    $70

    4. Computer Chip
    Apten Performance
    $350

    5. Magnum Powers MPII Supercharger
    Magnum Powers
    $1045

    6. Magnum Powers Supercharger Plenum
    Magnum Powers
    $ 499

    7. Magnum Powers 85MM Throttle Body
    Magnum Powers
    $350

    8. Pro-M 76MM or 87MM MAF, and 42lb injectors (with chip reburn)
    Super Coupe Performance
    $250 / $350

    9. 255lph aftermarket fuel pump
    Super Coupe Performance
    $135

    10. Magnum Powers Raised Top
    Magnum Powers
    $330

    11. Magnum Powers FMIC Intercooler Kit
    Magnum Powers
    $1450

    12. Stiegemeier complete cylinder heads
    Apten Performance
    $3,025 *with all options

    13. Stiegemeier Camshaft
    Apten Performance
    $ N/A

    14. Ported Exhaust Manifolds
    $ N/A


    15. Chip reburn with dyno pulls
    Apten Performance
    $450est..

    add few more things
    High-flow catalytic converters, supercoupeperformance, $150pr
    Long tube headers, supercoupeperformance, $705
    Coy miller II engine, coymiller.com, $7495
    1.7 roller rockers kit., Apten performance, $225
    Griffin Rad., supercoupeperformance, 615-650

    ??? Drop-in Whipple 2300 supercharger, apten performance, $coming soon

  10. #10
    Join Date
    Aug 2003
    Location
    Bayarea, CA
    Posts
    376
    I keep seein that MP Intake Kit on there and wonder if that expensive peice of pipe is really worth the money? How much wider is it then the stock plastic/rubber airtube? 165 for a peice of pipe sounds to be much. If i go to an 85mm tb i think i have to swich to it to make it fit? am i correct? All info is appreciated and helped on my track to makin my sc superblown. lol. Zach

  11. #11
    Join Date
    Apr 2002
    Location
    Pullman Washington
    Posts
    1,429
    The MP Upper Intake Plenum is probably one of the most important if not THE most important intake mod...The CAI piece is not as critical "The $165 tube you refer to"...

    It is all relative though...The intake piece will be needed when you jump up in TB and MAF size...

    Brad
    Last edited by cudaz101; 03-25-2004 at 08:42 AM.

  12. #12
    Join Date
    Feb 2005
    Location
    Desert Hot Springs
    Posts
    171

    Thumbs up A Very Good Mod List-(Stock to 350+HP)

    Found this Post, and wanted to refresh it for everybody. This is a really good List of mods that work well on SC's, and is a smart approach to make additional HP with regards to the amount of $$ spent!!!
    Note that if you want to get over 250HP, the cost per HP gain increases dramatically. Note also that all HP readings are >To-The-Ground Rear Wheel HP Readings, not at the Crank, like the factory 230HP rating is.

    Generally you can attribute approx. 20% loss from the crank, thru the trans, driveshaft,and diff. to the wheels....

  13. #13
    Join Date
    Dec 2003
    Location
    Altoona IA
    Posts
    3,237
    You could go this route.

    http://www.sccoa.com/member/index.php?uniquename=rhines

    Jake has over 300 hp with a completely stock internal motor.

  14. #14
    Join Date
    Nov 2004
    Location
    Falling Waters WV
    Posts
    723
    Just wondering since i am trying to reach 300 horse as well; But will i need to get the car tuned for a 70mm tb and a 73mm maf. I have the correct sample tube for the maf.

  15. #15
    Join Date
    Feb 2003
    Location
    Ames, IA
    Posts
    253
    Quote Originally Posted by Rob Noth
    Look at the list of top most powerful SC's by horsepower, and see who is above 300 hp. I doubt you'll see any cars with only boltons. Head porting is pretty much required to get to that power level, although the stock bottom end and cam should be OK.
    You will spend a lot more money reaching 300hp if you keep the stock cam in there. A custom ground cam is the best way to go, and they arent all that expensive when compared to most bolt-ons available for the SC. And when you consider the gains of a cam, I'd say it's one of the most important things, and sometimes the most overlooked.
    -Thomas

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