The Essential Craft of Keeping Pro Stock Mountain Motors Running

February 9th, 2011

Text and Photos by Sam Moore

Pro Stock Mountain Motors have cubic inch displacements of 820 to 825. Their capacities began much smaller, deriving from original equipment big-block engines of the ‘60s. But gradually the dimensions between their pan rails grew, allowing longer throw cranks to appear with connecting rods measuring 7.750 inches center to center and 5-inch bore centers with 4.770-inch-diameter pistons, all functioning within a deck height of 12 inches. Today’s Pro Stock engines operate on compression ratios of around 18:1, run on VP Race Fuel grade Q16, and generate in the region of 1,900 hp. Depending on weather conditions, they run quarter-mile elapsed times in 6.25 seconds at speeds close to 225 mph.

Jon Kaase Racing Engines has been a driving force in the development of these engines for as long as most can remember. From the beginning, when he worked with Dyno Don Nicholson, Kaase imposed uncompromising standards in race engine building. And his record of success has been impressive: He and his team have produced Pro Stock engines for 12 IHRA national championship winners, plus an NHRA Pro Stock title. Though their business now includes engine part sales to hot rodders, including the supply of the remarkable Boss Nine engine, the Winder, Georgia, firm still maintains about 20 Mountain Motor customers, refurbishing these formidable power plants after every 25 to 30 runs.

When reciprocating engine parts collide (usually pistons and valves) and a connecting rod or rods explode through the engine walls or the oil pan or both, foreign particles are immediately released into the oil stream to be sucked into the oil pump rotors. Rod bearings are often first to disintegrate, showering the pump with brass, copper and aluminum. Seasoned start-line observers will regale you with stories of inexperienced drivers breaking connecting rods at the starting lights and driving the entire length of the track, unaware that the vibration from the engine compartment was a signal of terminal distress. If the camshaft can still operate, usually the engine will continue to keep running—tearing itself apart all the way!

The chief concern about engine durability is the limited life of the connecting rods and also the condition of the skinny top pistons rings. The life cycle of these critical parts and others must be strictly observed in the rarified air of Mountain Motor Pro Stock racing.

In Kaase’s dynamometer cell, before this engine was tested, ace builder Chuck Lawrence leaned across to a visitor and said, “Have you ever heard one of these on a dyno before?” The visitor shook his head. “It’s pretty cool,” Lawrence insisted, “I never get tired of it.” He was right: that sound resides indelibly in the memory. Captured in the following images is the rebuilding process of a Mountain Motor Pro Stock engine.

Advertisement

285 Responses to “The Essential Craft of Keeping Pro Stock Mountain Motors Running”

  1. michael kors bags outlet uk (http://www NULL.terrortracker NULL.co NULL.uk/) says:

    michael kors bags outlet uk…

    http://monuselektronika.hu/?p=202.. (http://monuselektronika NULL.hu/?p=202 NULL. NULL.).

  2. water damage recovery Sibley IA (http://www NULL.simplewaterdamagerestoration NULL.com/ia/water-damage-restoration-in-sibley/) says:

    water damage recovery Sibley IA…

    I am extremely impressed along with your writing talents as smartly as with the structure for your blog. Is this a paid subject or did you modify it your self? Anyway keep up the excellent high quality writing, it’s rare to see a great blog like this o…

  3. appliance repair service Sandstone WV (http://www NULL.appliancerepairstars NULL.com/wv/appliance-repair-in-sandstone/) says:

    appliance repair service Sandstone WV…

    I have to show thanks to you for bailing me out of this incident. Because of exploring throughout the online world and meeting advice which are not productive, I figured my life was well over. Being alive minus the answers to the issues you have solved…

  4. Northville SD dishwasher repair services (http://www NULL.dishwasherrepairguys NULL.com/sd/dishwasher-repair-in-northville/) says:

    Northville SD dishwasher repair services…

    Wow, marvelous blog layout! How long have you been blogging for? you made blogging look easy. The overall look of your site is great, let alone the content!…

  5. luottoa (http://luottoa NULL.webnode NULL.com/) says:

    luottoa…

    Klaus…

  6. La Jara CO custom drapes (http://www NULL.customdrapesteam NULL.com/co/drapes-in-la-jara/) says:

    La Jara CO custom drapes…

    Hi, I think your website might be having browser compatibility issues. When I look at your blog in Opera, it looks fine but when opening in Internet Explorer, it has some overlapping. I just wanted to give you a quick heads up! Other then that, wonderf…

  7. Ridgeway MO junk removal (http://www NULL.junkremovalsquad NULL.com/mo/junk-removal-in-ridgeway/) says:

    Ridgeway MO junk removal…

    Somebody essentially help to make seriously articles I would state. This is the first time I frequented your web page and thus far? I amazed with the research you made to make this particular publish incredible. Magnificent job!…

  8. electric oven repair Ulman MO (http://www NULL.ovenrepairguys NULL.com/mo/oven-repair-in-ulman/) says:

    electric oven repair Ulman MO…

    Wow that was strange. I just wrote an really long comment but after I clicked submit my comment didn’t show up. Grrrr… well I’m not writing all that over again. Anyhow, just wanted to say great blog!…

  9. belstaff long way down jacket (http://www NULL.biodermtechnologies NULL.com/images/index NULL.asp?belstaff=belstaff-long-way-down-jacket-23rw NULL.php) says:

    belstaff long way down jacket…

    Consider the stick out of your ass and let children relish what a very enjoyable holiday for them and only lasts just a few hours.Deal with That Anemia with Stinging Nettle Tea…

  10. super saturday sales (http://byrdwell NULL.com/ssfm/data/htm/christmas-bogner-4 NULL.html) says:

    super saturday sales…

    Asset tags are strips of sturdy paper, plastic, leather or metal used to label tangible service assets for example furniture and equipment….

  11. michael kors parker glitz watch two-tone (http://www NULL.miguelsanchezpanta NULL.com/styles/home NULL.asp?michael=michael-kors-parker-glitz-watch-two-tone-40fv NULL.php) says:

    michael kors parker glitz watch two-tone…

    How about enabling grenade trajectories, or at least adding the option for it?…

  12. barbour jacka dam rosa (http://kungsgarden NULL.info/Bilder/index NULL.asp?sv=barbour-jacka-dam-rosa-95ux NULL.php) says:

    barbour jacka dam rosa…

    Ist盲llet f枚r att g氓 f枚r en turn茅 d盲r du 盲r i en grupp med en grupp andra turister och 盲r l氓st f枚r att betala pengar oroande var du g氓r, k枚pa en guidebook och en bra karta (eller iPhone app som fungerar utan WiFi eller dataroaming ) och din guide. L氓t o…

  13. sac longchamp (http://digiarts-hiv-unesco NULL.org/longchamps/) says:

    sac longchamp…

    Sac Michale Kors NFL Jerseys Sac Michale Kors Nike Air MaxSac Longchamp…

  14. The Essential Craft of Keeping Pro Stock Mountain Motors Running (http://www NULL.thesting NULL.com) says:

    Attempt uno…

    I found a great……

  15. Sac Longchamp France (http://driftwood NULL.uno NULL.edu/2013/01/page/3/) says:

    Sac Longchamp France…

    Sac Longchamp France…

  16. Bolsos Michael Kors (http://www NULL.eif-fvn NULL.org/pan/bolsos-imitacion-online-10 NULL.html) says:

    Bolsos Michael Kors…

    The Essential Craft of Keeping Pro Stock Mountain Motors Running « Drag Racer…

  17. ticktockwallpapers (http://ticktockwallpapers NULL.blogspot NULL.com/) says:

    ticktockwallpapers…

    [...]The Essential Craft of Keeping Pro Stock Mountain Motors Running « Drag Racer[...]…

  18. Botas Ugg Baratas Leopardo (http://www NULL.ysana NULL.es/ugg/botas-ugg-baratas-leopardo-6 NULL.html) says:

    Botas Ugg Baratas Leopardo…

    The Essential Craft of Keeping Pro Stock Mountain Motors Running « Drag Racer…

  19. louis vuitton iphone background (http://ineedaplan NULL.com/_db_backups/htm/doc/louisvuitton-us-2018 NULL.html) says:

    louis vuitton iphone background…

    Rising grapes is often time intensive but also rewarding, particularly when you harvest the “fruits of one’s labor.” Grape plants naturally begin preparing….

  20. belstaff 554 (http://www NULL.doctorpatti NULL.com/scripts/index NULL.asp?belstaff=belstaff-554-64xn NULL.php) says:

    belstaff 554…

    In the event you had a depressive episode this hyperlink may support differentiate bipolar from depression: The Goldberg Bipolar Spectrum Screening Questionnaire….

  21. Michael Kors Outlet Online (http://www NULL.eif-fvn NULL.org/pan/) says:

    Michael Kors Outlet Online…

    The Essential Craft of Keeping Pro Stock Mountain Motors Running « Drag Racer…

  22. air max (http://www NULL.raccolta10piu NULL.it/test/force/) says:

    air max…

    The Essential Craft of Keeping Pro Stock Mountain Motors Running « Drag Racer…

  23. christian louboutin 2014 (http://www NULL.sierracharra NULL.com/leidsegfre/zapatos-fluchos NULL.asp) says:

    christian louboutin 2014…

    The Essential Craft of Keeping Pro Stock Mountain Motors Running « Drag Racer…

  24. Google (http://www NULL.google NULL.com/tlrxsuhh) says:

    Google…

    One of our guests lately encouraged the following website….

  25. Botas Ugg Baratas En España (http://www NULL.ysana NULL.es/ugg/botas-ugg-baratas-en-espana-7 NULL.html) says:

    Botas Ugg Baratas En España…

    The Essential Craft of Keeping Pro Stock Mountain Motors Running « Drag Racer…

  26. bolso longchamp (http://www NULL.top-form NULL.es/old/comprar-bolso-longchamp-le-pliage NULL.html) says:

    bolso longchamp…

    The Essential Craft of Keeping Pro Stock Mountain Motors Running « Drag Racer…

  27. botas ugg baratas china (http://www NULL.isfnt-11 NULL.org/botas-ugg-baratas-china-221 NULL.html) says:

    botas ugg baratas china…

    The Essential Craft of Keeping Pro Stock Mountain Motors Running « Drag Racer…

  28. canada goose montebello parka (http://www NULL.contec NULL.es/over-es/canada-goose-montebello-parka-97 NULL.html) says:

    canada goose montebello parka…

    The Essential Craft of Keeping Pro Stock Mountain Motors Running « Drag Racer…

  29. Michael Kors Watches Outlet (http://www NULL.golfretamares NULL.com/jefieks/michael-kors-runway NULL.asp) says:

    Michael Kors Watches Outlet…

    The Essential Craft of Keeping Pro Stock Mountain Motors Running « Drag Racer…

  30. moncler mexico (http://www NULL.fermad NULL.org/es-mon/outlet-shops-moncler-cfkdfje-116 NULL.html) says:

    moncler mexico…

    The Essential Craft of Keeping Pro Stock Mountain Motors Running « Drag Racer…

  31. zapatos christian louboutin outlet (http://www NULL.247valencia NULL.com/clonsale/zapatos-suela-roja-louboutin-precios NULL.html) says:

    zapatos christian louboutin outlet…

    The Essential Craft of Keeping Pro Stock Mountain Motors Running « Drag Racer…

  32. testurltest (http://testurltest NULL.com) says:

    testurltest…

    This is a test…

  33. garcinia cambogia frutto (https://delicious NULL.com/katiehava65) says:

    garcinia cambogia frutto…

    I’ve been browsing on-line greater than three hours as of late, yet I by no means found any fascinating article like yours. It is beautiful value enough for me. In my view, if all web owners and bloggers made excellent content material as you probably…

  34. cheap fitflops online (http://fitflopsingapore NULL.fffgc NULL.org/) says:

    cheap fitflops online…

    fitflop sale…

  35. Hydrocarbon Resin (http://www NULL.hbjwhr NULL.com/) says:

    Hydrocarbon Resin…

    The company main business is further process the petrochemical production, with 8 production lines of ten-thousand-ton capacity for C9 and C10 separators, thermal & cold polymerization petroleum resin, petroleum naphthalene, tar and thousand-ton capaci…

Leave a Comment

You must be logged in to post a comment.