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Thread: HP guesses in the new year.....

  1. #1
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    HP guesses in the new year.....

    So guys, how much HP do you think our split port swapped XR7 will make with a turbo? Motor is stock and we don't want to break it so we aren't going to go crazy and it will be running on pump gas. Bone stock the split port made 173rwhp 194rwtq. Where will we go from here?
    Quote Originally Posted by Miller View Post
    Ya thats why i tape mine down. People think its bc i dont have a moonroof seal (which is true) but its really to keep my roof from ripping off .
    Email me here.

  2. #2
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    It will make at least 450
    MEMBER #2488 best rwhp 504 485 torque
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  3. #3
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    my guess is 350whp with the stock cam... if that is what you mean by the motor is stock
    Any idiot can make a Mustang fast...
    It takes a special idiot to make a Thunderbird fast!!!
    89 SC 4.3 stroker 384rwhp 473ftlbs
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  4. #4
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    525 😎 and grinning.
    Anthony Arnold
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  5. #5
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    At the motor I'm guessing 315. That 525 might work for a few hundred miles though

  6. #6
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    how much boost is planned? isn't 15lbs close to double whatever NA hp. there is more to it but a rough number
    Last edited by figulaz; 01-05-2017 at 12:12 AM.

  7. #7
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    285 HP. 290 tq

  8. #8
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    Come on guys, lets be realistic. It's a stock 99 split port 3.8L. It makes 173rwhp NA. It's going to run on pump gas.

    It has stock hyperutectic pistons, a stock cast crank, and powered metal rods. It has stock valve springs and stock cam. Yes, it is STOCK.

    On a good day 1psi boost can net maybe 15rwhp. So 10psi could maybe net 150rwhp. To get from 173rwhp to 500rwhp will require 500-173=327/15=22psi. Not happening. How much boost is safe with pump gas on powdered metal rods? There is no way we can run 20psi. Like I said, not an option to blow it up.

    If everything works well at 10psi we might make 325rwhp, but I've also seen 1psi netting only 10rwhp in which case 10psi would net 275rwhp. If we do make 325rwhp, that would be pretty impressive considering the most I've seen an SC make (even highly modified) at 10psi is around 295rwhp.

    It will be interesting to see how the motor responds in terms of HP/psi.

    I guess I should rephrase the question - how much power do you think it will make at 10psi, and how much do you expect it will make at 14psi? I think that's as high as we will go on a totally stock 100k mile motor.
    Quote Originally Posted by Miller View Post
    Ya thats why i tape mine down. People think its bc i dont have a moonroof seal (which is true) but its really to keep my roof from ripping off .
    Email me here.

  9. #9
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    Quote Originally Posted by 35thpartdeux View Post
    At the motor I'm guessing 315. That 525 might work for a few hundred miles though
    oo

    Good one. But I don't think 525rwhp would make it off the dyno, nevermind lasting for hundreds of miles.
    Quote Originally Posted by Miller View Post
    Ya thats why i tape mine down. People think its bc i dont have a moonroof seal (which is true) but its really to keep my roof from ripping off .
    Email me here.

  10. #10
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    You said "We don't want to break it." We never want to break stuff..... You never truly implied or I didn't take you as being SUPER serious "Its not an option to break it."

    You can be very sneakily on these things.


    305 to the wheels then......
    Anthony Arnold
    Home of "No Cash Racing!"

    Silver 90 AOD 12.03 @ Shootout 2010
    White 94 Auto ??????
    Black 95 5-speed ????

  11. #11
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    I'll stick with my guess of 350whp at 14psi. 10psi I'd say 300whp.
    Any idiot can make a Mustang fast...
    It takes a special idiot to make a Thunderbird fast!!!
    89 SC 4.3 stroker 384rwhp 473ftlbs
    Best ET 13.085 Best MPH 106.6... got some work to do!
    2016 V6 M90 Dyno Champ 2016 Mod 1 Runner Up

  12. #12
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    I think 300 rwhp would be impressive @ 10 psi but I don't think you will get it.

  13. #13
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    Quote Originally Posted by ScrapSC View Post
    You can be very sneakily on these things.
    Yes, yes I can. lol
    Quote Originally Posted by Miller View Post
    Ya thats why i tape mine down. People think its bc i dont have a moonroof seal (which is true) but its really to keep my roof from ripping off .
    Email me here.

  14. #14
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    just a guess here...

    I would look for 398 hp with of course that funny gas I know you will be putting on there some place...lol.....Rich
    Too many cars,too little time to drive them. Anything less than 500 cubes is a small block. If you slow down in life you will get run over..

  15. #15
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    I am going to say 322
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