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  1. MarkBroviak

    1/4 mile discussion and time slips post here!

    Wyatt put the truck on the scales tonight and it weighs 4565lbs! If you can update that on both lists please, thanks and sorry!
  2. MarkBroviak

    1/4 mile discussion and time slips post here!

    Brad, with the current gearing it will bang the 5400rpm limiter at 154mph so roughly about 1200ft out lol. It will be getting a rear diff swap for a fab 9" with 3.42gears which will help a bunch with weight and speed. Will be going up on turbo size also to make more topend horsepower as it is...
  3. MarkBroviak

    1/4 mile discussion and time slips post here!

    He is going to have to make some wholesale changes as we were at the limit of what we could get out of it at 116% but it’s all in the works! This was a great week of shaking everything down and figuring out what we need to change next. For the data nerds, we limited the fueling at 130mg but it...
  4. MarkBroviak

    1/8 mile discussion and time slips post here!

    Wyatt got a new pb during SickWeek running a [email protected]! I tuned the ecm and Buddy Callaway tuned the transmission! Thanks guys!
  5. MarkBroviak

    1/4 mile discussion and time slips post here!

    Wyatt Stengel with his lb7/4L80e powered 70 K15 rclb made a new personal best this week during SickWeek yesterday and went [email protected] on the brakes because he couldn’t go faster without a license. Truck is 4250lbs with me tuning the ecm and Buddy Callaway tuning the transmission. This...
  6. MarkBroviak

    1/8 mile discussion and time slips post here!

    I’ll work on that!
  7. MarkBroviak

    1/8 mile discussion and time slips post here!

    Got some new blood for the list! My boy Wyatt Stengel of the BoostBoiz YouTube channel got to make his first passes in his 1970 K15 RCLB 4x4 that is LB7 swapped with a 4L80E that weights 4300lbs. Tuned by Jeff Hale and myself. On 1/25/23 he went a best of [email protected] just getting a feel for...
  8. MarkBroviak

    Sick week 2023

    I'll be riding shotgun with Wyatt! Can't wait!!!
  9. MarkBroviak

    I see you Mark!

    Thanks James lol! Wyatt is a good buddy of mine and this project has been three years in the making. We had a good time last week getting a lot of stuff figured out with the truck. This is the first Bosch 25Sport used in a street type setup for any of us so there is a lot more involved to...
  10. MarkBroviak

    Twins with Twins, Anyone?

    We do the block so that the heads remain serviceable but like Jon said, you can ring the heads in a situation like yours where you don't want to pull it all the way apart. Polishing the piston tops is allows a great idea in my book as it tends to keep the pistons cooler. Your gasket part...
  11. MarkBroviak

    Twins with Twins, Anyone?

    This is why I told you that we run o-ringed block with 625+studs in anything over 700hp anymore because cylinder pressure makes them leak and you are in a situation where there is a completely different type of load on the motor that any truck will ever see. It sucks to see you have all the...
  12. MarkBroviak

    Happy Birthday James!

    Happy Birthday boss!
  13. MarkBroviak

    LB7 Yukon XL build Its getting out of hand

    Awesome build!!! Being the proud third hand owner of a Duraburb conversion (07GMC Denali XL with LMM Swap) I can honestly say that this should have been a factory option as it is one of the best vehicles I've been lucky enough to own. The only downside to mine is that it is still rocking the...
  14. MarkBroviak

    Well there goes my chances of 9s this year

    Piston or rod give up the ghost??? Better have been a piston because it shouldn't be a rod!!! Regardless that sucks to see bud!
  15. MarkBroviak

    1/4 mile discussion and time slips post here!

    Got a new one for the list! Derek O’Brien has an LBZ Allison RCSB SBE s476 with some juice at 5850lbs that went [email protected] last night on my tuning! Thanks guys!
  16. MarkBroviak

    1/8 mile discussion and time slips post here!

    Got a new entry for you guys! Derek O'Brien has an LBZ Allison RCSB 5850lbs than went [email protected] last night with a SBE and a single S476 and some spray tuned by me. Thanks!
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