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    Scored cylinders - attempting to ball hone them while 'in frame'

    I do engine refreshes in situ quite often, especially if the engine shows no other sign of need to rebuild. I'm with IdahoDoug, this appears to show a wrist pin (bushing) slop issue. I use a bore gauge to check ovality, at top center and bottom of pison travel - 2 x @90 degrees. If within...
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    Better Brakes bleeding, Actuate the ABS

    ABS Brake bleeding I go through a couple gallons of brake fluid a month, mostly bleeding german cars. The newer (2000>) cars actually have an OBD access to activate the ABS solenoids to get the bubbles out. This is done while using a pressure bleeder. In the new cars I use 2 bar pressure and...
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    Engine Rebuilding options for S/C

    Sounds like a good project, but also one to best set some targets so that you get the maximum benefit from it. The TRD SC barely makes enough air to feed the stock 4.5L at 8psi, when running the numbers of the SC MAPs, a M112 is a better fitment. So, that backs up to gains vs 'improvements' on...
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    Tundra brakes on an 80 series...

    I have designed and installed brake upgrades for 16 years, mostly Porsche 993twin turbo big reds into Audis. When I shopped and bought my 80, the main reason I wanted one over other tow duty vehicles was it's fantastic brakes from the factory. Whenever I read 80 brake "upgrade" threads I think...
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    Looking for pinstripe upgrade ideas

    I 'changed' my painted pinstripe 13years after the PO's dealer put it on kinda crooked - by deleting it all together. The procedure I've used for all painted pinstripe removal is easy-off oven cleaner, several clean rags and water. Wash the truck vehicle before you start, or you can scratch...
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    crank bolt with engine out.

    I've done it a couple times with the engine in the truck. I posted my successful procedure several years ago, you can put a 14mm socket over one of the flex plate bolts, and let it jam-stop against the trans access window. Easy to reach the proper pulley torque spec this way. HTH and my .02...
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    Supercharger rebuild

    FYI, this mod created quite a 'stir' when I first installed it back in 2007, but I now have some 50-60k miles with no ill affects, and my oil consumption is much lower than without it. But then again, I also have over 17k of driving on pavement with CDL with no ill effects either, so maybe you...
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    Supercharger rebuild

    I've had a couple M45 and M90 (non toyota apps) rebuilt by Magnuson in the last 10+ years. IIRC, they are the Eaton Authorized service facility. WRT 'teflon' rotor coatings, I didn't find much difference with them if the PCV system is put into the prechamber (see my posts on the subject...
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    CDL Locked Snow on Road "No ABS"?

    LOL! I have 190k total (100k mine) on my 80 with the stock front end, birfs and gears... But I did have to fix a leaking rear diff seal.:hhmm: Interesting tidbit that many new stock awd vehicles have the ability to lock up the center diff without any driver intervention. All banter aside...
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    CDL Locked Snow on Road "No ABS"?

    Heath, to be clear, my muse is competing with AWD, and do so quite successfully. That said, my 18 year instructor involvement is mostly teaching AWD driving skillsets to street drivers, teens, corporate, first responder, and HPDE classes. And, I enjoy good banter over basic stuff. And after...
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    Forced Induction and Gearing Selection

    I totally agree with this assessment. Changing gearing if using stock engine output levels has advantages. However, with forced induction, changing boost profile will have a bigger effect on 'mileage' and performance than the gearing. We could do some quick math, but the best part of turbos...
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    CDL Locked Snow on Road "No ABS"?

    LOL, a vehicle with an open diff will try to go in a straight line, and I don't find that the least bit interesting either. What I do find interesting, is in a straight line, a locked center diff will always allocate torque based on weight transfer. In acceleration, but more interestingly... in...
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    CDL Locked Snow on Road "No ABS"?

    Ok Heath, look at it this way... We know by physics that in a straight line with CDL torque follows weight transfer exactly. The only question then is what variables affect torque *not* following weight transfer exactly. Arent those variables turning radius, wheelbase and applied torque when...
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    CDL Locked Snow on Road "No ABS"?

    That's got a lot of variables attached to making such a generic statement. All tires slip when the truck moves, longitudinally and laterally. In chassis dynamics study, it's the 'significance' of the amount of slip that dictates oversteer, understeer, or total lack of control (100% slip). The...
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    Forced Induction and Gearing Selection

    Mileage and Forced Induction vs gearing I think maybe the gears you have are fine with 315 "...for a force induction 80 that sees a lot of highway trips". Take a look at this link using these tire diameters in the calculations: Stock 275/75 16 = 32.24in 315/75 16 = 34.60in IME/O a lot of...
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    CDL Locked Snow on Road "No ABS"?

    Wow that's a whole 'nother thread IMO. The easy answer is 'no', or at best ='it depends' to all of the above. The same size tire 'generally' has the same load ratings up to the lower maximum pressure. IOW, two 285/75 16 (35psi max on the Pmetric, and 65psi on the Reinforced) tires on stock...
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    CDL Locked Snow on Road "No ABS"?

    80 tire pressures on snow/ice Here's my .02 testing the 80 tire and air bag pressure at Steamboat Ice Track FWIW (pretty sure you can get my full report with a search of the archives 2006).. IMO/E the 80 has the best dynamic control with the tires planted on the snow/ice. The best...
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    CDL Locked Snow on Road "No ABS"?

    With all due respect, I'm sure you mean to say things that aren't confusing in the thread above. I read them, and thought that many sections of the posts you put up were either plain wrong, or conveyed a basic misunderstanding of mechanical and dynamic handling of awd/abs systems (IMO)...
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    CDL Locked Snow on Road "No ABS"?

    Turn the CDL on above 30mph, ABS goes off.... Turn the CDL back off above ~30mph, the ABS will stay off until the next restart cycle of the truck. More confused. With the ABS *on* or *off* you can power slide the truck into corners. In fact, with CDL *on* or *off* you can power slide the...
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    CDL Locked Snow on Road "No ABS"?

    For more reading on CDL and ABS, this is a good summary http://4x4abc.com/4WD101/ABS_parttime.html In my 20+ years of teaching awd performance driving and awd chassis dynamics study, the biggest obstacle to education and technique, usually can be traced to misunderstanding how awd systems work...
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