Originally posted by johnunit
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They actually did that on the 80s 351 4V truck engines that were put in the F250's. Two smog pumps too, one fed air to the heads, one fed air to the exhaust manifolds. No catalytic converter though, so no idea what purpose the air was supposed to serve.86 Lincoln Town Car (Galactica).
5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley
91 Lincoln Mark VII LSC grandpa spec white and cranberry
1984 Lincoln Continental TurboDiesel - rolls coal
Originally posted by phayzer5
I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers
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yes, by 69 it was fairly common.
air pumps facilitate combustion in the exhaust even without the cats being present and warmed up.
85 4 door 351 Civi Crown Victoria - Summer daily driver, sleeper in the making, and wildly inappropriate autocross machine
160KMs 600cfm holley, shorty headers, 2.5" catted exhaust, 255/295 tires, cop shocks, cop swaybars, underdrive pulley, 2.73L gears.
waiting for install: 3.27's, Poly bushings, boxed rear arms, 2500 stall converter, ported e7's, etc
06 Mazda 3 hatch 2.3L 5AT (winter beater that cost more than my summer car)
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My father had a '73 C10 w/350, and it had a pump that divided into eight little metal tubes, and each tube injected air into one of the ports of the exhaust manifolds.
As others have said, it was to facilitate further combustion of the exhaust gases in an attempt to decrease emissions.
No cats, just the air pump.
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Originally posted by TomO View PostMy father had a '73 C10 w/350, and it had a pump that divided into eight little metal tubes, and each tube injected air into one of the ports of the exhaust manifolds.
As others have said, it was to facilitate further combustion of the exhaust gases in an attempt to decrease emissions.
No cats, just the air pump.
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Originally posted by 86VickyLX View PostBurn the extra gas in the exhaust with the extra air.
well, what it did do was make fireballs blow out of the tailpipe on a semi-regular basis while driving. I ripped all that shit off, and the truck ran like a completely different animal. It would actually idle instead of huffing and chugging and stinking so bad your eyes would burn.86 Lincoln Town Car (Galactica).
5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley
91 Lincoln Mark VII LSC grandpa spec white and cranberry
1984 Lincoln Continental TurboDiesel - rolls coal
Originally posted by phayzer5
I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers
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Tom_O, where did you get your power figured from? I have a book that has some conflicts with those numbers but they may be wrong...
Johnunit, where did you find the 1200 stall? Mine is definitely higher, i'd say around 1800, but our difference in years may have something to do with that. Mine has similar shift points as well, 4K-4100, I have noticed that mine shifts later then civi 5.0 tranny's, perhaps the police valvebody is designed to shift later? I hadn't heard of someone else with the 351 police having the same shift points at WOT, interesting.-Phil
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+1982 Ford LTD-S Police Car. Built 351w, Trickflow 11R 190 Heads, Holley Sniper EFI, RPM Intake+ Hyperspark dizzy, WR-AOD, Full exhaust headers to tails. 3.27 Trac-Lok Rear. Aluminum Police Driveshaft. Speedway Springs+Bilstein Shocks, Intermediate Brakes, HPP Steering Box.
+2003 Acura CL Type S 6-speed
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Keep in mind that mine is a civi canadian car, so that the converter and trans are police spec is an assumption. After 100,000 miles it's also an assumption that it's a factory torque converter in working order.
85 4 door 351 Civi Crown Victoria - Summer daily driver, sleeper in the making, and wildly inappropriate autocross machine
160KMs 600cfm holley, shorty headers, 2.5" catted exhaust, 255/295 tires, cop shocks, cop swaybars, underdrive pulley, 2.73L gears.
waiting for install: 3.27's, Poly bushings, boxed rear arms, 2500 stall converter, ported e7's, etc
06 Mazda 3 hatch 2.3L 5AT (winter beater that cost more than my summer car)
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Ahhhh i forgot about that, true true.-Phil
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+1982 Ford LTD-S Police Car. Built 351w, Trickflow 11R 190 Heads, Holley Sniper EFI, RPM Intake+ Hyperspark dizzy, WR-AOD, Full exhaust headers to tails. 3.27 Trac-Lok Rear. Aluminum Police Driveshaft. Speedway Springs+Bilstein Shocks, Intermediate Brakes, HPP Steering Box.
+2003 Acura CL Type S 6-speed
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Originally posted by Brown_Muscle View PostMine has similar shift points as well, 4K-4100, I have noticed that mine shifts later then civi 5.0 tranny's, perhaps the police valvebody is designed to shift later? I hadn't heard of someone else with the 351 police having the same shift points at WOT, interesting.
I recall both Nates reporting WOT auto shift points below 4000rpm with their P72s - I want to say somewhere between 3500 and 3800.2012 Mazda5 Touring | Finally working on the LTD again!
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