Upgrades and Aftermarket - 99 & up 7.3L EngineUpgrading or adding OEM or aftermarket equipment to your 1999-Up Super Duty or Excursion with 7.3L Power Stroke diesel engine. Please confine discussion of topics in this forum to those items that are specific to the 7.3L Power Stroke engine.
Jody did cylinder pressure testing on my truck Thursday and Friday with a new Black Motorcraft CPS and a new Blue International CPS.
This thing can now be laid to rest as I left with a black CPS in my truck.
Here are the hard facts.
Idle efficiency is 44.4 percent with the blue and 55.4 percent with the black.
Cylinder pressure at idle is 553 psi at 9 degrees ATDC with the blue and 572 psi at 8 degree with the black.
Combustion duration was only 35 degrees of crank rotation with the blue and 51 degrees of crank rotation with the black.
Torque at idle was 4.7 foot pounds per cylinder with the blue and 4.3 per cylinder with the black.
The testing was also done on the road and was along the same lines as the idle testing. It just compounded the numbers with RPMs. So there it is tested and graphed.
When you read the graph, the blue CPS doesn't have a clean curve. The black CPS gives a nice rise and fall on the graph with a nice rounded top. The blue CPS gives a rise sooner but has a divot in the top of the curve then falls off sooner.
FOMOGO
__________________ 2001 F-250 Lariat, Black, CC, SB, 2WD
304 hp and 627 tq on Dunbars Dyno
2001 F-250 XL standard cab, beater, hauling trash... Stock except for a 60 horse flash...
304hp and 617 tq on Dunbars Dyno
2001 F-250 Xl Standard cab, project truck...
Custom Tunes by DP-Tuner, Custom Fuel System by ITP Diesel, Custom Trans by BTS
[ QUOTE ]
Jody did cylinder pressure testing on my truck Thursday and Friday with a new Black Motorcraft CPS and a new Blue International CPS.
This thing can now be laid to rest as I left with a black CPS in my truck.
Here are the hard facts.
Idle efficiency is 44.4 percent with the blue and 55.4 percent with the black.
Cylinder pressure at idle is 553 psi at 9 degrees ATDC with the blue and 572 psi at 8 degree with the black.
Combustion duration was only 35 degrees of crank rotation with the blue and 51 degrees of crank rotation with the black.
Torque at idle was 4.7 foot pounds per cylinder with the blue and 4.3 per cylinder with the black.
The testing was also done on the road and was along the same lines as the idle testing. It just compounded the numbers with RPMs. So there it is tested and graphed.
When you read the graph, the blue CPS doesn't have a clean curve. The black CPS gives a nice rise and fall on the graph with a nice rounded top. The blue CPS gives a rise sooner but has a divot in the top of the curve then falls off sooner.
FOMOGO
[/ QUOTE ]
Hmmmm can you spell SOTP out of cal or the spend the $$$ placebo syndrome [img]/ubbthreads/images/graemlins/shrug.gif[/img]
My SWAG is that it takes out some of the chip/programmer over tunning issues ... let the games continue [img]/ubbthreads/images/graemlins/grin.gif[/img]
Larry
__________________ <font color="green">MY PICTURES - Look around ... lots of good stuff </font>
2001PSD(PCM:HPI2)SD E-350,Dk Emerald Grn,4.10LS, <font color="blue">Mustang dyno - 183.9/400.4 stock</font> [img]/ubbthreads/images/graemlins/smile.gif[/img], BTS w/Schaeffer's ATF[img]/ubbthreads/images/graemlins/biggrin.gif[/img] , ITP 3.5"/4" exhaust w/Magnaflow & Aeroturbine,Dieselsite 203* T-stat/Zerex G-05,F.Pwr, Ext/Int. Upgd. pkg,R. Bds,AIC,Tow Pkg, Rear & Slider windows,<font color="red">AMSOIL air, oil-bypass & rear end 75w-140 fluid ,<font color="blue">3/8" fuel sys w/10µ Dieselsite DAHL100 & fuel manifold/sight glass</font>,6 way dr. pwr. seat, Magnefine trans/P.S. filters</font>, husky mats,<font color="red">5 gauge A-pillar ISSPRO EVs w/Grn mkr illum. + air & fuel restriction gauges</font>,Dieselsite coolant filter and zinc electrode, manual GPR switch & GP LED, blinking security LED, weathertechs, a few other "Gadgets" [img]/ubbthreads/images/graemlins/smile.gif[/img], & a 1981 26' Prowler TT(26Y)
__________________
2002 F-250 XLT,6 Spd,AIS Intake,Air Horns (Hadley Twins),Quadzilla Stealth Module,Oilguard Filter,Starter Security Modification,XM Radio,Autometer Cobalt Gauges,Baldwin Coolant Filter,Edelbrock Shocks,Hellwig Sway Bar (Rear),Fabtech Dual Stabilizer,Custom Running Board Lights,Light of Fire Rear Lights,Diamond Plate Tool Box, Tailgate and Side Rails, AirDog Fuel Seporator with Isolation Mounts, Manual Trans Filter, HX Mod, Maxed out Credit Card. Born in Kentucky, Raised and Modified in New Jersey, Home of "T"
I am really glad you posted your findings! I talked to Jody on Wednesday and he said something about testing this piece. Will you have a link to the graph sometime? Just curious. I do have one in the truck right now, but will pull it out when we switch back to #2 diesel. Want to take full advantage of the Jody tune. [img]/ubbthreads/images/graemlins/wink.gif[/img] Not really able to decipher the results, but can you tell us dumb ones if this is actually retarding the timing? I am just want to know if I am losing power by using this blue thingie.
A big thanks to both you and Jody for putting this to rest. Still curious about dyno results from anybody. [img]/ubbthreads/images/graemlins/phoney.gif[/img]
How did your dyno graphs compare to Kainers(page 34 on the High Performance Cps post? I don't have the good fortune of being able to see and compare many dyno graphs to see what you are talking about. But, it looks like Kainer's dyno of the black cps spikes around 2600 and then drops like a rock. The blue cps doesn't seem to drop as fast, but it also appears to be plotted on a different scale.
Could you translate what the difference in combustion durations mean? I guess by your comment the greater degree of crank the better, but why? I am new to this stuff and it really bothers me when I don't understand this terminology. [img]/ubbthreads/images/graemlins/confused.gif[/img]
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2002 Ford F-250, Auto,4x4,Lariat, CC, Stealth Dual HPOP system(dual IPR's), DP Tuner 6 Position Chip no start/stock/60hp/80hp/100hp/140hp, Bullydog Outlook monitor, Garrett BB turbo w/1.15 housing, AFE StageIIw/proguard filter intake, 4" turbo back exhaust, ITP fuel regulator kit, harpooned tank with ITP tank mods, 203 T-stat ,FASS, Suncoast Proloc T/C and Transgo shift kit.
the blue has weird spikes in its burn rate. the weird spikes could for sure make it sound different, but a good even burn at the correct time is more desirable, which the black gives.
if you drive it around, and rev it up, the exact same things to a larger scale are seen.
summary,
stock black is more efficient, and better for your engine.
for the experts, PLEASE feel free to correct me! thank you!
Is it possible that these are the result of less fuel w/the blue and more fuel w/the black? How is it possible that the black cps can be more efficient and have less torque? [img]/ubbthreads/images/graemlins/confused.gif[/img] [img]/ubbthreads/images/graemlins/shrug.gif[/img]
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1999 F250 SD Crew Cab, 4X4, 7.3, Auto Trans.
DP 80 hp Econo Tune,Ford AIS,Mag Hytech Trans Pan,Inline Tranny Filter,Pillar Pod W/Autometer Gauges(Trans,Boost,Pyro),Visor,Tinted Windows,Vent Shades,Ultima Ele. Brake Controller,LT285/75R16 Bridgestone Dueler AT'S.
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