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| Advanced Discussion - 7.3L Powerstroke Performance Advanced topics related to the 7.3L Power Stroke Engine |
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#1
04-07-2009, 05:05 PM
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A little reroute of the MAP sensor tubing...
I have heard this from a few different sources, that by moving the Map line to the hot side of the IC you will gain a bit in throttle response... I thought it made perfect since, I build boost faster on that side as well as higher numbers. So last night I rerouted it over there.
Just some quick drives from the hotel to the jobsite. It works! Might try it out if you have the ability...  My only concern is how well the MAP sensor will take to the 300-400 degree air temps that might get seen there... 
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#2
04-07-2009, 11:14 PM
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That was posted on TDS awhile back. The theory is that the pressure on the hot side is higher so the pressure ramps up at a higher rate than the cool side. The MAP response also ramps up at the faster rate when hooked to the hot side. It works, too. Did it a long time ago. Temperature should not be a problem, the OBS MAP pressure tap point is the intake plenum and does not have an intercooler. The air column in the hose doesn't move anyway so there is little or no heat flow.
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400hp 7.3 IDE wannabe  1997 California 4x4 OffRoad 1.0 RV OBS turbo, 399.8 hp through the stock muffler/3.5" tailpipe
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#3
04-07-2009, 11:48 PM
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Mine has been tapped there for 4 years. No MAP problems yet.
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#4
04-08-2009, 11:35 AM
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also joe any hot air movment would go into your gauge line in the middle there im going to move mine this week
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STEVE 99.5 Hot Rod Tug Boat TEM machine built 7.3 Precision 71MM BB, TERMINATOR, RACER X,FARMERIZED D CODES, ITP, ARP everywhere,1/4 fill, DP-TUNER CRYO'ED valve covers New tow rig 96 CCLB DRW. DP,Autometer,MSP,Hybrid TP-38,SBC con OFE, TERMINATOR 2003 CCLB DRW Farmerized, DP-Tuned, More to come WWW.MAGICSMOKEPERFORMANCE.COM  R.I.P muley we miss you Magic Smoke Performance is a Proud sponsor of Ford Diesel Power!!!
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#7
04-08-2009, 05:32 PM
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I did mine on the hot side a while back. Did notice a SOTP increase in throttle response on the low end.
MAP line on left, boost gauge on right: 
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Ryan 97 F350 CC Dually psd auto; 38 gal rear tank, Firewall modded for SD 4" DP, custom 5" exhaust, Electric fuel w/ Reg Return, AirDog, Stage 2's, BTS HPOP, SD van turbo conversion, Hydroboost conversion, ARP's, 910's, SB pushrods, Swamps IDM, Tymar, Sound deadening & Heat shielding on firewall (both sides), Tapercore I/C, Modded SD I/C pipes, Custom A/C lines, 6.0 trans cooler, SD tranny lines, SD electric vacuum, SD harness & accessories, BD X-monitor, Aeroforce scangauge, Fuel pressure gauge, HID's, Clear lenses all around, some other pretty stuff Motor's back in and looks pretty, got other issues now, LIKE TIME AND MONEY...
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#8
09-15-2010, 09:24 PM
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Huh wow might have to try this out
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99 F-350 extended cab long bed, 4in magnaflow turbo back exhaust, 10in fabtech lift with 40in tires, 4:56 gears front and rear, K&N air filter with custom alluminum air box, TS Performance chip with Tony Wildman tunes, 6speed manual tans, aftermarket compressor housing from paulshp.com, quickie throttle pedal from paulshp.com 1. stock 2.economy 3.daily 4.tow 5.street 6.extreme 
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#9
09-15-2010, 10:14 PM
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does seem to be a good idea.
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new ride 2000 7.3 ext cab shortbed.lariat king ranch rims. 6637 intake. php tune.  soon to come. 250/100s . dual SD pumps. terminator oil. h11 studs, 910 springs push rods g40r. 5 inch exh my own tunes.  [ford7.3] 12:51 am: id buy a book on fourwheeling from ken before i bought from either of them.
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#10
09-15-2010, 10:26 PM
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obs is in the hot side, right off the Y-pipe.
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