Paul Correct me if I'm wrong but I thought I remembered reading that you didn't use the standard cam of Bill's in your build due to clearance issues???
You and me both but, as it turns out, he got it sorted out and instead of the originally planned HP-3 I'm running the HT-4. He realized a marginal performance difference between the two and trimmed inventory to just the one. He did some more calibration measurements and I think he trimmed the valves a calibrated smidge, if at all. I was just teasing with the 'Mean Spirited' comment by the by.:hello:
Are you running a 6.2 ? You might have too much injection timing at low rpms.
6.2 block (660) with 6.5 heads. I don't have the best of scanners but the Palmer software gave enough info that in one of my many chats with Bill he said that was within specs. I've lost the file recorded (hard drive crash) or I'd post it up. The pump is the new Stanadyne ULDS, er, ULSD units. Air Dog is registering 9 psi and doesn't dip below 8 under any acceleration conditions.
Weird problem, same gears, same HP/tourqe, same weight. Should have same results. It must be driver error? :driving:
That's what got us stumped and it leaves driveline and tires to blame because (stupid human comment follows) I refuse to believe it could be little ol' me :rof:
Tires: The other trucks run BFGoodrich Commercial A/Ts, OEM sizes. 635's truck, Tall tires on 19.5" rims x6 Me, 31" tall 285s on 17x9 rims.
Roll down into Ellensburg WA out of Yakima starting at 70mph at the crest and shift into neutral. The other trucks reach upwards of 80-85mph. My truck slows to 61mph with these "Fulkans!" With the same size BF Trail A/Ts it rolled up to 83mph.
On a local hill starting at 55 I can get up to 57 where 635 gets to 64mph. Yeah he's got me by a ton with the 3500 dually so there's that to consider.
I picked up a set of 255 x 45 Eagle M+S tires on 17 x 8 rims and endured the embarrassment of that sight for an hour. That was ugly. SS-Steve said, 'it doesn't look bad.' I thanked him for his kindness and outright lie with 'are you kidding, its FUGLY Looking.' He found honesty after that and we both had a good laugh.
But, no change in the local hill roll test. Still topped out at 57mph.
I will jump on the blame the 4wd bandwagon.
hows the t-case? what oil is in the diffs and t-case?
T-case and both Differentials are original with new oil whatever spec the data sheets call for 5000 miles ago. Transmission was just rebuilt 3000 miles ago. Both transmission and rear diffs have larger covers/pans (MagHytech).
Rear brakes were done with new drums and shoes too long ago to remember but before we moved out here which means five years ago. Checked by Midas 2000 miles ago and were said to be adjusted correctly. Calipers are a year old and the pads are getting to the point of replacement.
Off the ground, front tires spin with the noise of light pad contact. Rears turn as well as I could expect with the driveline and all attached.
So, after helping a brother 6.5er all day yesterday, I'm going back under the front today to replace the left hub, remove C/V axel, disassemble both of the old units and insert the splined portion so the hubs stay together (thanks again for saving me from myself) and remove the front drive shaft.
For what it's worth; regardless of turbos (GM5, 8), tires, tunes or injectors (HO vs Standard)...the EGT's remain the same (and higher than 'norm') at all cruising speeds (GPS tracked) over a couple of miles of flat ground. 400-50mph, 500-60mph, 650-70mph. Acceleration to 70 from zero (riding the power, not standing on it and letting it catch up to the pedal) nets 11-1200. Normally, this would be for another forum but the point is, something is dragging the truck down...
For what it's worth, he said the same about his truck before a new motor and cam went in his.
