Drag Racing Discussions > Front Engine Dragsters

The testing of new rods

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aafa760:
Man one thing I hate is the first burn out and run on new set of rods and pistons rings and bearings.
To many times at 800 ft 900 ft one thinks it wants to go back to the manufacture air mail.

But after 5 they understand they are to stay in side nice aluminum block and do their jobs.

At least these are only in an Blown Alcohol.

The Nitro motor well it has been calmer lately

Tucson Reunion here we come~
Bryan

wideopen231:
personally  a set with more runs than I am comfortable makes  me nervous . New set  just makes me want   to step on it more. Butt have broken new stuff.

hotrod316:
WE GOT 6 MINS LAST FIRE  ??? ???

noslin:
i look at classified on Insidetopalcohol and see guys mention runs on parts.

so, for rods...  (and i know it varies)  if alum. how many runs do you go before swapping and likewise with steel rods.   do you swap rod bolts at all .  say you keep for 80 runs but change rod bolts at 40 or something like that.  what do most people do. you only account for full hard passes or how do you consider half pass etc.

how does the differ between injected versus blown.  all on meth.

ty
dean

JrFuel Hayden:
With my all iron SBC I like to change rods & bolts at about 75-80 runs. Alto because of the timing between races, last time I changed them at 100 runs. Now these are for my 10,000 rpm alky motor. If I was running lower rpm, lower HP or lower compression ratio, I could get more runs on the alum rods. i know one JF team that killed a motor with tie steel rods after around 100 runs, because he thought they would not break, Wrong,  steel rods break too after too many runs. 

Jon

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