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I thought it'd be a good idea for everyone to post their combos and what mileage they get, if of course you use an accurate method to calculate your mileage.
Please let me know if there are any other values I should add here!
Car: 88 TC
Options: 5 speed, all others (except sunroof and leather)
Mileage: 114,350
FP at idle: 40
TPS: .91 (new IAC, base idle is "near stalling" speed)
Base timing: 12*
Spark gap: 0.032"
Tune up parts: All Ford with Belden spark plug wires.
Spark plugs: Autolite 103
Boost: My wastegate reference line is disconnected. It seems to peg at 22 PSI on my Autometer gauge.
Octane: 93
Exhaust: Stock downpipe with a gutted cat, dumped right after the cat.
Tire/wheel size: Stock wheels / 225 60 16
Vacuum at hot idle: 17" (I have worn cam & follower lobes.. Could this be it?)
Cooling system: Bone stock, new ECT from NAPA. This includes the thermostat temperature range.
Turbo: Stock IHI, braided feed line, stock intercooler & hoses.
Air filter: K&N cone on VAM.
VAM voltage readings: (N/A, will get these ASAP!)
Maintenance history:
At 89,000 miles:
- Head gasket done as preventative maintenance. It was not needed. While this was done, I cleaned the entire top end with a pressure washer and a TON of brake cleaner, this was with the head disassembled.
- All engine ground wires have been cleaned. New battery & starter cables were installed. I added a few grounds from the negative battery post to various places on the frame and engine.
- Differential was flushed out and fluid was replaced with Mobil 1 synthetic 75W 90
- SPEC Stage III and new flywheel from NAPA was installed. Rear main was replaced, friction modifier was added to the transmission. I also ran some Sea Foam through the engine oil before I changed it.
Recent changes:
- Sea Foam'd the fuel system and intake.
- Did the clutch, replaced with a stock unit and had the flywheel surfaced. Did not add friction modifier to gearbox this time around.
- Flushed the entire brake hydraulic system
- Flushed the entire clutch hydraulic system
- Changed gear oil to Rotella 85W 90
- Water pump was changed
- A/C belt disconnected (pulley broke)
- All new brake pads, rotors, one new caliper. New front wheel bearings to go with the new front rotors. I used Mobil grease.
- New front swaybar bushings, and end links. Energy Suspension.
And finally, the good stuff:
55 MPH cruise, I average 36 miles per gallon. The way I calculate this is by topping my tank off completely, and driving until I'm damn near out of gas (or out of gas). I have a 5 gallon can I keep filled when I do this.
70 MPH cruise, I average 32 miles per gallon if I don't use the cruise control. If I use the cruise control, I usually only average 30 miles per gallon at these speeds.
75 MPH cruise, I average around 28 MPG and my tach is sitting almost on top of 3,000 RPM at this point. At 80 MPH, I only get about 26.5 or 27 MPG. These are using cruise control, on nicely paved highways with not many hills. (Mostly I-10, I-75, and I-4 here in Florida).
In the city, well, I drive like an A-hole and I get about 15-17 MPG usually. LOL
I hope this thread gets something started!
Please let me know if there are any other values I should add here!
Car: 88 TC
Options: 5 speed, all others (except sunroof and leather)
Mileage: 114,350
FP at idle: 40
TPS: .91 (new IAC, base idle is "near stalling" speed)
Base timing: 12*
Spark gap: 0.032"
Tune up parts: All Ford with Belden spark plug wires.
Spark plugs: Autolite 103
Boost: My wastegate reference line is disconnected. It seems to peg at 22 PSI on my Autometer gauge.
Octane: 93
Exhaust: Stock downpipe with a gutted cat, dumped right after the cat.
Tire/wheel size: Stock wheels / 225 60 16
Vacuum at hot idle: 17" (I have worn cam & follower lobes.. Could this be it?)
Cooling system: Bone stock, new ECT from NAPA. This includes the thermostat temperature range.
Turbo: Stock IHI, braided feed line, stock intercooler & hoses.
Air filter: K&N cone on VAM.
VAM voltage readings: (N/A, will get these ASAP!)
Maintenance history:
At 89,000 miles:
- Head gasket done as preventative maintenance. It was not needed. While this was done, I cleaned the entire top end with a pressure washer and a TON of brake cleaner, this was with the head disassembled.
- All engine ground wires have been cleaned. New battery & starter cables were installed. I added a few grounds from the negative battery post to various places on the frame and engine.
- Differential was flushed out and fluid was replaced with Mobil 1 synthetic 75W 90
- SPEC Stage III and new flywheel from NAPA was installed. Rear main was replaced, friction modifier was added to the transmission. I also ran some Sea Foam through the engine oil before I changed it.
Recent changes:
- Sea Foam'd the fuel system and intake.
- Did the clutch, replaced with a stock unit and had the flywheel surfaced. Did not add friction modifier to gearbox this time around.
- Flushed the entire brake hydraulic system
- Flushed the entire clutch hydraulic system
- Changed gear oil to Rotella 85W 90
- Water pump was changed
- A/C belt disconnected (pulley broke)
- All new brake pads, rotors, one new caliper. New front wheel bearings to go with the new front rotors. I used Mobil grease.
- New front swaybar bushings, and end links. Energy Suspension.
And finally, the good stuff:
55 MPH cruise, I average 36 miles per gallon. The way I calculate this is by topping my tank off completely, and driving until I'm damn near out of gas (or out of gas). I have a 5 gallon can I keep filled when I do this.
70 MPH cruise, I average 32 miles per gallon if I don't use the cruise control. If I use the cruise control, I usually only average 30 miles per gallon at these speeds.
75 MPH cruise, I average around 28 MPG and my tach is sitting almost on top of 3,000 RPM at this point. At 80 MPH, I only get about 26.5 or 27 MPG. These are using cruise control, on nicely paved highways with not many hills. (Mostly I-10, I-75, and I-4 here in Florida).
In the city, well, I drive like an A-hole and I get about 15-17 MPG usually. LOL
I hope this thread gets something started!
'88 TC Walbro 255HP, Stinger FMIC, PIT BOV, Pro 5.0, Kirban, RR cam, FRPP strut tower brace, T3