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What is the fastest idi truck

Discussion in '6.9L IH & 7.3L IDI Diesels' started by mexicanjoe, Dec 3, 2019.

  1. mexicanjoe

    mexicanjoe Full Access Member

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    Question: what is the fastest street legal 7.3 idi truck? and what is the top speed ? Question came to mind when speaking with a friend of mine. Im thinking a 7.3 with 3.55 gears and a 5 speed should have no problem hitting 100 mph.....any opinions or facts will be greatly appreciated.
     
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  2. IDIoit

    IDIoit MachinistFabricator Supporting Member

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    I can hit 100 mph no problems.
    I usually cruise 85-90
    110 is the fastest ive gotten it...
    however... the fastest IDI will not be in a 83-94.5 F250/350
    im gearing up to put a p pumped IDI in a 41 1/2 ton
    tryin to keep it below 3000#
    power to weight ratio is what its all about.

    57083604_124280938747132_267674619723382784_n.jpg

    27369080_2154780941205669_7501477397501954195_o.jpg
     
  3. saburai

    saburai Supporting Member Supporting Member

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    Street legal or street driven? I sure don't know what else is out there, but @Thewespaul shop truck scoots pretty good;) seriously, I am assuming that you're talking about a dead stock idit and I think that you're probably right on the money :Thumbs Up
     
  4. saburai

    saburai Supporting Member Supporting Member

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    Oh Man!
    That's gonna be too cool-Flame Thr
    I wish that you weren't all the way on the other side of the country, I'd come visit in a New York minute :cheers:
     
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  5. Thewespaul

    Thewespaul Supporting Vendor Supporting Member

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    lol well Ive been over 135 in the shop truck, (GPS confirmed) with the power it makes now it will go well beyond that but I have no intention of going that fast. Lots of guys talk about their trucks being the fastest but I dont see any other trucks running any real times at the track
    :dunno:popcorn


     
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  6. IDIoit

    IDIoit MachinistFabricator Supporting Member

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    its gonna be a while honestly.
    ive got to finish my damn super duty first and foremost.
    but I will be buying Carrillo rods in the next month or so.

    this will also be just the first round. stock 41 frame, with a suicided front model A axle.
    truck arm rear suspension, and a versi 9" with a grizzley locker and 3.70's on hand.
    i have several different sizes of slicks for the back until i get the correct ratio.
    trans will be a ST-10. until i scatter it with clutch drops lol

    74291006_149501483002931_5078834703381823488_n.jpg
     
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  7. mexicanjoe

    mexicanjoe Full Access Member

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    I believe Wes on his claim to speed.. Im wondering what rear end ratio he is running.

    I cant go very fast in mine with a 4.10 rear, but it will pull when asked to and do it everyday....I know this much : my buddy Scooter and I got a '78 Chevy pick up with a built Olds 455 to run 171 mph.... His daddy ran cows on a 64,000 acre ranch and we had a highway 17 miles long cutting through the middle of it.....we also got a 1951 International one ton windmill truck to go............................52 miles per hour wide open... fun times!!!
     
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  8. Thewespaul

    Thewespaul Supporting Vendor Supporting Member

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    3.55 with a zf5 s42, it will do over a hundred in 4th, @IDIBRONCO has seen that LOL
     
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  9. chris142

    chris142 Full Access Member

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    Mine with 3.55 and a T19 will burry the 80 mph speedo. Takes 3 counties to do it though.
     
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  10. FrozenMerc

    FrozenMerc Registered User

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    Mine must have been the slowest in stock form then. '85 F350, DRW, 6.9, T19, and 4.56:1 out back. 3300 rpms at 65 mph. -Lame

    The Ranger Overdrive helped, now she will get close to 90 at 3300 rpms, given enough time, favorable tail winds, and a semi for drafting....
     
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  11. Jason1377

    Jason1377 Supporting Member Supporting Member

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    I have spun the speedo in the second stock 1993 f250 2wd e40d n/a that registers 90 on the speedo will never do that again though made me wear brown pants on a back road of a rock quory death wobbled the hell outta me but made $200 n gave truck away.

    Wes and the rest of you inspire me to want a.project truck
     
  12. IDIBRONCO

    IDIBRONCO IDIBRONCO

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    Yes I did!
     
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  13. Scotty4

    Scotty4 Registered User

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    My boss built a 6.9 pull truck with 2600hp. Asked him how and only responded “work and 4 turbos.” Lips are sealed on the rest. Not street legal however but still awesome.
     
  14. saburai

    saburai Supporting Member Supporting Member

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    That's a lot of HP...
     
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  15. IDIoit

    IDIoit MachinistFabricator Supporting Member

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    thanks for the tag line
     
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