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Lost power after lift

Discussion in '2nd Gen. Tacomas (2005-2015)' started by Shellbak, Apr 19, 2010.

  1. Apr 19, 2010 at 4:18 AM
    #1
    Shellbak

    Shellbak [OP] Member

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    Yeah, I know its sounds odd but I swear I lost some HP to the rear wheels after I did a suspension lift.

    What I have:
    • 2006 Tacoma TRD dbl cab long bed, all stock, 52K miles, well maintained
    Here's what I did:
    • Bilstein 5100 Shocks on front set to 1.75"
    • Bilstein shocks on rear
    • Firestone Riderite airbags set to 5lb (minimum air setting)
    • Toyo AAL 1.5 rear leaf to existing crappy 3 leaf pack
    • Toyo shims on axle, added longer U-bolts, and carrier drop spacer
    After the original shock / leaf / airbag installation I was surprised how high the rear end went. I was even more surprised how many vibes i had in the truck between 15-45. Thats when I added the shims, Ubolts and Carrier spacer. It feels pretty close to normal now. Whats not normal is the gas pedal to rear wheel HP...I suspected it may be a tad sluggish but tried to deny it as being anal.

    Well, after towing boat for first time the sluggish part has been validated. Suspension handled rock solid. Felt amazing pulling a 5200lb load. Unfortunately getting to 60mph was a marked disapointment.

    OK all you pro modders....Any idea how I can fix this? Has anybody else experienced a marked loss of HP after a lift? I hear people say the rear suspension will settle over time....wonder if that settleing will reduce the driveshaft angle and give me my HP back?
     
  2. Apr 19, 2010 at 4:25 AM
    #2
    Sparky4.0

    Sparky4.0 Well-Known Member

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    did you change tires? or you think your feelin a hp loss from the lifted windplow effect?
     
  3. Apr 19, 2010 at 4:32 AM
    #3
    jandrews

    jandrews Carolina Alliance Southwest Region Ambassador

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    This...if you did go to larger tires, it has the same effect as gearing your transmission up...

    Also, you're higher from the ground now...things are going to appear to move slower...what does the speedo/stopwatch say?
     
  4. Apr 19, 2010 at 5:04 AM
    #4
    Shellbak

    Shellbak [OP] Member

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    I have the original tires size on vehicle. I am aware of the "windplow" effect, and at first thats what i thought the feeling of reduced speed was. While towing it was completely obvious the taco wasn't performing like before. Coming to speed and crossing bridges were relatively easy before but were extrememly sluggish now. Havent used a stopwatch. Is there a technique for measuring HP with time?
     
  5. Apr 19, 2010 at 5:16 AM
    #5
    OH-MAN

    OH-MAN Well-Known Member

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    TRD skid painted black,
    Mine is lifted apx the same amount.
    While I have not towed anything I have not noticed any power loss.
    Mileage is real good as well 19 on the low end and 22 on the high end.
    I expected some loss of mileage with the lift but so far I have not seen any change.
     
  6. Apr 19, 2010 at 5:16 AM
    #6
    Shellbak

    Shellbak [OP] Member

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    Jandrews...off topic

    Im from fayetteville. How glad r u 2 c delhome move on? Foxxys on the hot seat this year...hope he pulls it together and manages 2 get the ball into S.Smiths hands. Its hard 2 watch a player with such explosive ptoential just stagnating on the o-line.
     
  7. Apr 19, 2010 at 6:29 AM
    #7
    Sparky4.0

    Sparky4.0 Well-Known Member

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    well i dont think the lift made that big of a difference. perhaps your due for a tune-up at the same time you installed the lift. sorry i cant be of more help.
     
  8. Apr 19, 2010 at 7:50 AM
    #8
    XwXRYANXwX

    XwXRYANXwX Well-Known Member

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    wtf....:eek:
     
  9. Apr 19, 2010 at 10:03 AM
    #9
    jandrews

    jandrews Carolina Alliance Southwest Region Ambassador

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    lol uh...check your PM.
     
  10. Apr 21, 2010 at 4:23 AM
    #10
    Shellbak

    Shellbak [OP] Member

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    Im going to try removing the toyo aal 1.5 rear leaf spring and see if that fixes 1) the huge gap of air between the tire and wheel well and 2) give me my HP back. Im gonna leave the shocks/ and airbags and everything else on.
     
  11. Apr 21, 2010 at 3:13 PM
    #11
    DrRabbitFurHead

    DrRabbitFurHead Yeah, there's a TSB for that!

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    Icon Extended Travel Coil Overs, Fox Rear Resi 8-Way Adjustable Shocks, Light Racing UCA's, OME Rear Leafs, M/T Classic Locks 17x9, Nitto T/G (285/70/R17), 5mm Billet Aluminum Spacers, Demello Sliders, All Pro Front Plate Bumper & IFS Skid Plate, PIAA 510's, Doug Thorley Long Tube Headers, O2 sims, Rear Timbren's & U-Bolt Flip Kit , 3* Rear Axel Shims, Extended Rear Brake Lines, 48" Hi-Lift with a ton of accessories, Wet Okoles, TRD bed mat, Borla Air Filter, Garmin Nuvi 765T, Viper 5901 remote start, 50% tint.
    Weird. I added my rear suspension and didn't notice squat. The heavy steel bumper and skid plate I noticed. I also noticed the larger tires, but not the lift.
     
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