twincam88b tensoiners

Discussion in 'Engine, Fuel and Exhaust' started by HOLY DIVER, May 26, 2013.

  1. HOLY DIVER

    HOLY DIVER Junior Member

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    boy i still can't make my mind up! my deuce has plenty of power for my riding style but i'm going in the cam chest next week to upgrade to hydraulic tensioners,andrews 21 grind cam or save $250???how much does the 21 increase compression?will the increased compression affect engine life?somebody make my mind up for me i can't seem to do it on my own lol!:D
     
  2. HDDon

    HDDon Experienced Member Contributor Retired Moderators

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    The addition of a cam will not increase compression. The cam will change the performance of the motor by increased lift and dwell.
     
  3. dolt

    dolt Senior Member Contributor

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    The addition of a cam will not increase STATIC compression but the earlier intake close of the 21 cam will increase CORRECTED compression and COLD CRANKING PRESSURE (CCP) which will result in increased torque.

    The upgrade to the hydraulic tensioner/roller chain/hi volume oil pump is a money well spent; good investment. You didn't mention which kit but if not the SE Hybrid kit, you will need a set of conversion cams to complete the upgrade. You should also upgrade the inner cam bearings in the process.

    The 21 cams are more suitable for a heavier touring model. You might consider the 26 cams for the lighter Deuce. JMHO.

    No worries about engine life; you will get a little TQ/HP boost with no effect on engine life.

    Yes, you can do the job yourself. You will need the service manual for your bike, basic hand tools, a couple of specialty tools or the common work arounds and you will need to decide if you want to retain the OEM pushrods or replace them with adjustable pushrods. Pushrod selection will determine the R/R process.

    I assume you have already upgraded the intake and exhaust to Stage I? If not you should as part of the upgrade. You should also consider including a tuner, such as the Dobeck TFI to add fuel which the upgrade will require to perform properly.
     
  4. HOLY DIVER

    HOLY DIVER Junior Member

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    i'll be going with the screamin eagle hybrid kit,very good info on the cam selection,yes i have heavy breather/exhaust but no tuner....hehe mine has a CV carburetor :)
     
  5. HOLY DIVER

    HOLY DIVER Junior Member

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    anybody have any dyno runs before and after the andrews 26 grind cam?
     
  6. Slo-Ryd

    Slo-Ryd Junior Member Contributor

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    Plenty of dyno run sheets on nightrider with a variety of exhausts and carbs vs. EFI.:s
     
  7. HOLY DIVER

    HOLY DIVER Junior Member

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    is that a website?youtube channel?got a link?:D
     
  8. Jack Klarich

    Jack Klarich Expert Member

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  9. Slo-Ryd

    Slo-Ryd Junior Member Contributor

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    Thanks Jack. I'm at work and was in a hurry.....forgot the link:s
     
  10. dolt

    dolt Senior Member Contributor

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    So, the bike is an earlier model and the motor is 88". You should consider pulling the heads, at least a multi-angle valve job, new guide seals and shave about .050" to get compression up to about 9.5 with a .030" head gasket. The compression boost will make a big difference in performance.