Turbine Doc
Just Another Diesel Guy
Here is some run data I have been collecting for a while, data collection has improved as I've added gauges, some data early in sheet is older stuff with early HP program and GM-8 turbo with a TM on it.
I think we have found a new "sweet spot" 2100-2200 for the 6.5 with this turbo, I made a run last Friday Waycross Ga to Ms 450 miles on single tank of fuel, avg 70mph, when I filled up Sunday it took 23 gal to get to full a nozzle click stop 3x full, same distance traveled previously would require 1 1/4 of a tank, on return to Waycross I was holding similar mpg until I started collecting data above 75 and doing throttle push to 100mph & hill climbs.
IMO this is the turbo GM should have put on the truck to start with.
What you see on last page are 2 data sets one with IC plumbed in, and on the return drive I bypassed the IC and straight plumbed turbo to the engine taking IC out of the loop, notice IAT even with full load on isn't mega hot, so I'm thinking this turbo with WMI might be the better ticket than IC. Spool up has slightly improved without IC, and black exhaust at hard acceleration clears quicker.
On the drive over I called Slim to get his thoughts on it, his IC is different then mine and may have better flow, his IC enters from 1 end and exits from the other, the IC I'm running (Kennedy/Spearco) enters and exits from center of the IC, so I'm theorizing that his IC may flow better than mine, which is possibly in addition to him having a 5 speed manual may be why I by "seat of pant dyno" saw/felt more turbo lag then he seemed to be having.
I think we have found a new "sweet spot" 2100-2200 for the 6.5 with this turbo, I made a run last Friday Waycross Ga to Ms 450 miles on single tank of fuel, avg 70mph, when I filled up Sunday it took 23 gal to get to full a nozzle click stop 3x full, same distance traveled previously would require 1 1/4 of a tank, on return to Waycross I was holding similar mpg until I started collecting data above 75 and doing throttle push to 100mph & hill climbs.
IMO this is the turbo GM should have put on the truck to start with.
What you see on last page are 2 data sets one with IC plumbed in, and on the return drive I bypassed the IC and straight plumbed turbo to the engine taking IC out of the loop, notice IAT even with full load on isn't mega hot, so I'm thinking this turbo with WMI might be the better ticket than IC. Spool up has slightly improved without IC, and black exhaust at hard acceleration clears quicker.
On the drive over I called Slim to get his thoughts on it, his IC is different then mine and may have better flow, his IC enters from 1 end and exits from the other, the IC I'm running (Kennedy/Spearco) enters and exits from center of the IC, so I'm theorizing that his IC may flow better than mine, which is possibly in addition to him having a 5 speed manual may be why I by "seat of pant dyno" saw/felt more turbo lag then he seemed to be having.
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