Cam Change/ will post dyno results

Discussion in 'Race 400/430/455' started by Bruce Hunter, Feb 4, 2002.

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  1. 10sec 455

    10sec 455 Well-Known Member

    Bruce,
    Any porting done to these heads? Sounds like just some clean-up? Have any new info on your dyno runs?
    Jeff
     
  2. Buicks4Speed

    Buicks4Speed Advanced Member

    duration and lift

    On the cam subject. Looking the the .050 numbers is deceiving. The actual "lobe-area" is closer to a single pattern cam if you look at the 308 and pay attention to the lift. My 308 roller version that was 267/275 was a single pattern at .300 lobe lift at 128/128. Cam lobes had close to .400 lift both intake and exhaust. The 308 solid from TA has less exhuast lift so I would guess the intake duration actually passes the lobe duration at higher lift. SO I wouldn't look at it as 6 degrees spread. Also, compression has an influence of how much I/E ratio is recommended. On a high compresion motor say 12.5 and up I/E ratio only needs to be 65-70% but say on a 9.5 compression motor 75-80% is more ideal. Is another thing to consider when setting up a combination. One reason the TA cam recommends 12.5 or better for compression for best results with the 308 cam.
     
  3. BQUICK

    BQUICK Gold Level Contributor

    Bruce, is this your 71? You say it ran 11.18 but yiu have sig with 10.46.
    I thought this was the TA built motor in your blk 71? Confused.... :confused:

    I'm putting the 308 in JAGUICK over the winter along with alum Stage 1s, Wildcat and Dom. Should wake the cat up.......

    Bruce
     
  4. Bruce Hunter

    Bruce Hunter Well-Known Member

    Wow who digs up these old posts?

    Bruce this is the T/A motor, built in 1998 and running pretty well yet today,The car was originally running in the low 11's then Earick Racing helped me with a cam change to the t/a 308s cleaned up the stage 2 heads slightly, and bumped the compression from 12.2 to 13.4 stuck it on the dyno and produced 706hp and i think 656 fp/tq. it has not been down at all since 98' and still runs very nice, prolly could use a better driver though! Ha, but still having fun.

    Bruce
     
  5. BQUICK

    BQUICK Gold Level Contributor

    Ahh, I see....old post....no wonder I was con-fuse-ed.
     

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