View Full Version : 3k & 4k GSK?

10-14-2002, 12:56 PM
Can someone explain for us ignorant types what the 3k and 4k GSK's are? -- or at least give us a link? It has something to do with governor springs in the injector pump that allow the rail to continue to fuel beyond 3000 or 4000 rpm -- I know that much, I think. :)<br><br>I know there's been a recent thread, but I'd like to have it better described, and perhaps know a bit about the issues and advantages -- particularly for street and towing. <br><br>Thanks!<br><br>GP

10-15-2002, 05:07 PM
Gear Poet:<br>I cannot provide much technical detail, but I have the 3K gsk, and here is what I have found. The engine now runs smoothly and evenly all the way to about 3200. Although I hardly ever use the full RPM, the continued fuelling up to that point makes the truck much more driveable; the feel is MUCH stronger.<br>For towing, the GSK is great. Now that I have the ATS, I can lock up in 2d gear and pull strong all the way to over 50mph. For in-city stop and go, this ability is great, and overcomes the feeling of being behind all of the other traffic. Also, coming off of on on-ramp, the 3000 lets you wind out in thrd gear locked up to over 75MPh (3;54) nOT Much is able to keep up as you merge into traffic.<br><br>I asssume that the 4000 is even better, but I did not want to change the valve springs.<br>george

10-16-2002, 07:02 AM
OK, Smokey, I appreciate this. Now -- where can I get a 3 GSK kit, for approximately how much, and what does it take to install it? <br><br>Thanks, again, anyone!<br><br>GP

10-16-2002, 01:45 PM
You can get the GSK at: Piers Diesel (http://www.piersdiesel.com). Also, call Piers or Louise for information or advice. Piers is one of the most knowledgeable Cummins people around.<br>george

10-16-2002, 04:14 PM
12v mechanical pump only on this mod -- that's what I'd originally thought. :-[ Gee, that 7100 must be sweet.


10-17-2002, 11:49 PM

I've got a 3K GSK just sitting here waiting to go in my '96. I think it's going to help peg the &quot;FUN-O-METER&quot;! [laugh]

I think it's 'bout time for you to &quot;plug and play&quot; with yours (EZ or Comp, etc.)

Say, just a little something interesting- Last weekend I installed a compressor upgrade on my turbo. It is a housing and pinwheel for a HX40. My low throttle boost has almost doubled, peak went from about 35 to 40-42, and I even get more just cruising down the highway with no load. The turbo was barking sometimes just when the automatic was shifting! I have readjusted my boost control for 35psi max, which is just where I wanted it. Throttle response is better, and spool up is quite a bit quicker.

10-18-2002, 12:05 AM
Ya, I was being stupid -- though maybe there was something I could be doing with the VP44 in addition to the comp controls -- duh! :-[<br><br>Got the Edge C. installed already. <br><br>Curious -- on that HX35/40 -- is that a kit? If so, where &amp; how much? <br><br>GP

10-18-2002, 02:25 AM
Yeah, it's an upgrade kit, I'll PM the details.<br><br>Vin