Technical > Spud Miller's Cave

versiitality of set up

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wideopen231:
Spud,

After rereading artical on nitro on site.Seems my setup should be pretty versatile  for straight alky to 30 or 35%. No plans for running nitro mix every weekend,but for some show stuff.setup is.
 482 TFX-92 hemi
BAE fuel  heads
12.7:1 compression
296 at .050 cam with .800 lift
DSR pump at 6.8 gpm
Enderle hat with k barrle
.037 nozzles and around 130 main.
Mag 12 34* to 38*
4.10 gear 32 tall tire

questions: tuneup calculator calls for .012 richer which is also lot more pressure with .039 nozzles its same main.Better to change nozzles and keep pressure same?Figure no changes to leanouts this way.
             Have hi/lo valve body any benifit to high gear leave.Since hi only run cost about .5 thinking it would offset gains from nitro.Plus added heat to trans and converter not  great ,but if its fast so what.
          Anything that would make setup more versatile for changing from alky to aky/nitro and K.I.S.S. still apply?
             Just thinking or maybe wondering ahead.

             

Spud Miller:

 If the pressure increases to over ~130 PSI on a pass, then I'd put larger nozzles in it, otherwise I'd leave them alone. The only change I'd make to any lean outs is to disable them :) especially at first. Your metering valve percentage will change. Your timing looks ok.

 Leaving in high gear will cancel all the benefits of nitro and will indeed roast things. At low percentages, I'd use that transmission!

 Have fun,
 Spud

dreracecar:
is this engine blown or hat injected???

wideopen231:
injected.

msundstrom:
What you are running is very close to my combo only mine is BBC and 1 point less compression. I have run 2 different BBC combos and a 30% load tuneup has been the same as my straight methanol tuneups, 40% changes big time. It is fun!
Mark

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