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CVO Technical => Twin Cam => Topic started by: nidan on April 05, 2010, 10:16:18 AM

Title: Andrews 48H
Post by: nidan on April 05, 2010, 10:16:18 AM
Andrews recently posted specs for their new 48H cam , for reference the 54H numbers are up.  attached is a dyno from a 96" with D&D fatcats


  broad tip cams for baggers  max torque at low and mid RPMs. -an option for those running 255's



                         Duration Valve Lift @
Part# Grind Timing(*) CL** .053 .020 Lift TDC    Springs Application                      
 
216348 48H  INT 13/29     98    222 257 . 548  .153  Stock
            EXH  43/15    104   238 273   .548 .163
 

216354 54H INT 16/42    103    238 273 .555 .165 Stock
           EXH 43/15    104    238 273 .555 .158
Title: Re: Andrews 48H
Post by: skyhook on April 06, 2010, 11:04:27 AM
255 specs per big boyz head porting calculator:

           lift    open    close    duration    tdc lift

intake   .550   6          25          211       .079
exhaust .550   48        7            235       .070

i like the 48h...more intake duration...more overlap...higher tdc lift...should make similar torque and pull longer than the 255
Title: Re: Andrews 48H
Post by: nidan on April 07, 2010, 07:40:42 AM
I'v been hunting around for a bit more on them , it looks as though Hillside was involved in spec' s .

Andrews recommends the 54 for larger motors, both are said to run cooler than the 255 and have a little broader curve.
Title: Re: Andrews 48H
Post by: HD Street Performance on April 07, 2010, 08:33:24 AM
The new offerings by S&S are right there with their "easy starts". There is a flood of these new short cams
Title: Re: Andrews 48H
Post by: eleft36 on April 16, 2010, 09:44:47 PM
103" With 48H
Corrected Compression  10.4:1       
    Cold Cranking Compression  215.6@ SL
A.T. B Boyz calc

Start prob?
Title: Re: Andrews 48H
Post by: aka_Matt on April 17, 2010, 12:21:41 AM
103" With 48H
Corrected Compression  10.4:1       
    Cold Cranking Compression  215.6@ SL
A.T. B Boyz calc

Start prob?

i would use the 54H with that set up...
Title: Re: Andrews 48H
Post by: HD Street Performance on April 17, 2010, 09:51:17 AM
There's a pinger in the works, I would not go there
The 54 would be better and Woods TW408-44 better yet