WHICH GEARS...?
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Junior Member
Joined: Nov 2000
Posts: 9
Likes: 0
From: NAPLES , FLORIDA , USA
WHICH GEARS...?
Hey Guys ,
I went and acted like I was going to buy this 2001 F150 Cause I wanted to see what the RPM's were at at 65 mph with OD on and off. 1700 RMP with OD on 2500 OD off.
Thats on a brand new 2001 5.4 3.55 extended cab flareside.Now my truck 33 bf mud terr, I had the same test same run and I was exactly 150 RPM's less then the stock truck.I had just the chip K&N filter replacement and flowmaster dual single in dual out.
Then I put the K&N F.I.P.K install with the poweraid TB spacer and the Truck is now 200 RPM"s aboce stock which is 1900 RPM OD on and 2700 RPM OD off, smae set up 5.4 and 3.55 gears now since I have gained RPM"s do I still need Gears and which size..4.10's.?
Also when I install headers eventually will my RPM"s rise..1998 F-150
MOD'S
-5.4 LITER
-FLOWMASTER DUAL
-SUPERCHIP
-K&N F.I.P.K
-POWERAID TB SPACER
-3IN BODY LIFT 33.1250 BF MUD TER'S
-3.55'S
-STANDARD CAB SHORT BED
-KATSKIN CUSTOM LEATHER
-TOWING PACKAGE
-CLIFFORD ALRM WITH REMOTE START
-DOUBLE LIMO
-MOONLIGHT BLUE
-ROLL-n-LOCK
-WELD TYPHOON'S 16.5x9.75
-WESTEN NERF'S
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I went and acted like I was going to buy this 2001 F150 Cause I wanted to see what the RPM's were at at 65 mph with OD on and off. 1700 RMP with OD on 2500 OD off.
Thats on a brand new 2001 5.4 3.55 extended cab flareside.Now my truck 33 bf mud terr, I had the same test same run and I was exactly 150 RPM's less then the stock truck.I had just the chip K&N filter replacement and flowmaster dual single in dual out.
Then I put the K&N F.I.P.K install with the poweraid TB spacer and the Truck is now 200 RPM"s aboce stock which is 1900 RPM OD on and 2700 RPM OD off, smae set up 5.4 and 3.55 gears now since I have gained RPM"s do I still need Gears and which size..4.10's.?
Also when I install headers eventually will my RPM"s rise..1998 F-150
MOD'S
-5.4 LITER
-FLOWMASTER DUAL
-SUPERCHIP
-K&N F.I.P.K
-POWERAID TB SPACER
-3IN BODY LIFT 33.1250 BF MUD TER'S
-3.55'S
-STANDARD CAB SHORT BED
-KATSKIN CUSTOM LEATHER
-TOWING PACKAGE
-CLIFFORD ALRM WITH REMOTE START
-DOUBLE LIMO
-MOONLIGHT BLUE
-ROLL-n-LOCK
-WELD TYPHOON'S 16.5x9.75
-WESTEN NERF'S
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Senior Member
Joined: Jun 1999
Posts: 329
Likes: 0
From: Cary, NC
Whaaaat??????????!!!!!!!!!
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98 F-150 XLT 4X4 ORP Super Cab Short Bed, 4.6, Auto, 4.10's, Mag-Hytec diff. cover, Magnacharger supercharger, Superchip, Gibson single cat-back, 80/100w German head lamps, Warn HS9500i winch with semi hidden mount, Wrangler dual battery kit with red & yellow top Optima batteries, 285/75R16 Goodyear MT/R's, 16x8 Center Line Hell Cats. Needs one more door.
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98 F-150 XLT 4X4 ORP Super Cab Short Bed, 4.6, Auto, 4.10's, Mag-Hytec diff. cover, Magnacharger supercharger, Superchip, Gibson single cat-back, 80/100w German head lamps, Warn HS9500i winch with semi hidden mount, Wrangler dual battery kit with red & yellow top Optima batteries, 285/75R16 Goodyear MT/R's, 16x8 Center Line Hell Cats. Needs one more door.
Senior Member
Joined: Jan 1999
Posts: 1,327
Likes: 2
From: OK
You can jack with the engine till you're blue-oval in the face and it won't correct the gearing of the truck. The new ratio R&P depends on what size tires came on the truck from the factory.
With 255/70R16s from the factory, 4.10s over-compensated (a little) for the 285/75R16s installed on the Expedition. Speedo is now too close to claim any error.
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1997 4x4 Expedition- 4.6L, true dual exhaust w/glass-packs, K&N air filter, SuperChip, airbox mods, Edelbrock shocks, 285/75R16 BFG ATs, 2000 "XLT" wheels, 4.10 gears, Auburn LS, Clarion In-dash CD player, Smitty Bilt push bars and nerf bars.
2000 4x4 F250 SD XLT SuperCab SWB- 6.8L, Offroad Pkg, Camper Pkg, 4.30LS, Tape & CD player, Remote Keyless Entry, Sliding back glass, tinted windows, 265/75R16 OWL tires.
NoMo's site
With 255/70R16s from the factory, 4.10s over-compensated (a little) for the 285/75R16s installed on the Expedition. Speedo is now too close to claim any error.
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1997 4x4 Expedition- 4.6L, true dual exhaust w/glass-packs, K&N air filter, SuperChip, airbox mods, Edelbrock shocks, 285/75R16 BFG ATs, 2000 "XLT" wheels, 4.10 gears, Auburn LS, Clarion In-dash CD player, Smitty Bilt push bars and nerf bars.
2000 4x4 F250 SD XLT SuperCab SWB- 6.8L, Offroad Pkg, Camper Pkg, 4.30LS, Tape & CD player, Remote Keyless Entry, Sliding back glass, tinted windows, 265/75R16 OWL tires.
NoMo's site