12 Valve Engine and Drivetrain Talk about the 12V engine and drivetrain here. This is for 1994-1998.5 engine and drivetrain discussion only.

12 OR 24

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Old 10-26-2002, 11:45 PM
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12 OR 24

IWANT ANOTHER TRUCK BUT I DON'T KNOW IF I SHOULD GO WITH A12 OR 24 VALVE. WHICH ENGINE CAN YOU GET THE MOST POWER OUT OF, WHICH ENGINE LASTS LONGER AND WHICH ONE WILL BE CLOSER TO TROUBLE FREE.
Old 10-26-2002, 11:52 PM
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Re:12 OR 24

Most power potential (and cheapest power) = 12v
Trouble free = 12v
Cheapest to maintian = 12v

They both last just as long more or less. One may have something small like a lift pump that needs to be replaced more than another one... but basically the same service life.


;D
Old 10-27-2002, 07:23 AM
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Re:12 OR 24

Unlike SOME of our members who have taken the best from both trucks ;D the 5 speed manual on the 12v doesn't have the gear splits that the 24v with it's wider RPM range offers. I went to the GV to help out, waiting for the GSK. Winding roads that don't allow 4th gear but aren't enough load for 3rd gear killed me before the Gear Vendors. <br>Greg
Old 10-27-2002, 09:28 AM
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Re:12 OR 24

;D ;D ;D ;D
Old 10-27-2002, 04:14 PM
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Re:12 OR 24

1ST GEN:<br><br>I agree with what &quot;Superduty&quot; has already told you <br>about the 12V trucks. However, one thing about the<br>24V engines is the &quot;ease&quot; with which you can BOMB it!!<br>If you want 80 H.P., just add a &quot;fueling box!&quot; If you<br>need 30-40 more H.P. just &quot;stack&quot; another fueling<br>box on top of that first one! ;D To really increase<br>the power on the 12V I think the P7100 pump needs<br>to come off the truck and be properly &quot;calibrated&quot;<br>on a Bosch Test Stand. <br><br>But the P7100 pumps are TOUGH! And the 12V does<br>not need the &quot;extra&quot; pusher pumps like the 24V <br>when you start increasing the H.P. <br><br>I watched my son take his 2001 24 valve from a <br>&quot;stock&quot; H.P. rating of 199 up to 497 with two boxes,<br>injectors, and a Piers HX-40! <br><br>---------<br>John_P<br><br>
Old 10-29-2002, 11:00 AM
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Re:12 OR 24

Sure can't argue with John about stacking boxes to get HP. I live in CA and was fortunate enough to luck into a 215 hp engine (before 180 hp with EGR). I worry about Smog inspections. The 12v can have loads of mods done w/o any visible exterior clues. Once a wire has been tapped on a 24v , it's pretty hard to &quot;untap&quot; it for warantee work or eyeball inspections. The pump removal hasn't happened on my truck YET, at 412.2 on Diesel Dynamics Dyno-jet, but other changes have been made. And will be made. ;D<br>Hey 24v guys- when the 24 first came out, folks were getting better milage with the 4:10 gears than the 3:54. Is this still true?<br>Greg




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