Compression Ignition Addict
Join Date: Jan 2014
Location: Fort McMurray, AB
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14s dont have engine braking either. All previous fords use tow/haul to supply supplemental braking. All it does is use the different gears to keep rpms high and defuel the engine, thus slowing the vehicle down, not very effectively though. Diesels naturally want to gain rpm, thats why this isnt very effective. Exhaust braking uses the vgt veins to block off the exh and put back pressure on the engine and slow it down, like a pacbrake. Engine braking uses the engines compression stroke against itseld, instead of setting up for a power stroke it doesnt fire the cylinder so the engine does all the work compressing the air but nothing happens in the cylinder after TDC to accelerate the piston back down. Like a jake brake.
As of this point there is no true engine break for any light vehicle. Alot of people call exhaust brakes engine brakes but they arent. Pacbrake has made the loadleash for the 6.7 cummins, sort of like a jake brake but it doesnt cycle the exh valves to use the compression, it just holds them open to sort of make a bunch of dead cylinders. Cool idea and its a start, eventually i hope they make one for other engines.
2013 - F350 CCLB. - 40" Lift on 40s. H&S XRT w/ CTS. Sinister EGR Delete. MPD CCV Delete. Wicked Wheel 2. SDP Downpipe. No Limits CAI. 5" FloPro. Retrofit HIDs.
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Last edited by HighHP; 02-17-2014 at 06:56 AM.