Do I Really Need an ARC Rod?

[jr dragster T]

My MGT? The thing runs like a raped ape! I take excellent care in my trucks, I clean it to brand new after every time it gets muddy, Engine tear down every season and so on. Once the the head gets to around 190-220F the thing just SCREAMS with all 4 tires throwing roost's.

 

[Rotore]

In a vertical shaft engine the rod isnt even sitting in oil. If it was it would smash into the oil very violently and cause fatigue. It uses a gear on the cam or a oil pump to spray oil around onto these parts. So basically the dipper aint gona dip much. And Yes that is my nitro truck, Team Associated MGT 4.60 .28 big block SE.

i ask because im think on experimenting with a vertical to horizontal conversion...

 

[BAMBY]

one more ? on the arc rod...(i dont mind the rc truck talk )
umm, i was looking on the dynocams website, and i saw a arc rod that said enduro and one that said s/s...
whats the diff?
its the 4th and 5th one from the top of the list. both are teh stock 3.875.
http://www.dynocamstore.com/index.php?cPath=23_40_118
same price too???

 

[jr dragster T]

The difference is most likely different journal sizes.

 

[BAMBY]

thanks tyler, but now im really wondering, because when i called dyno cams to ask, the guy said one has a dipper with a hole so the oil can go straight to the bearing, and one doesnt have the hole.

he recommended the one with the hole beacause of better lube, but i was wondering if it would scrape up the metal crap in the oil (metal shavings from normal operation... dont know how else to say it) and put it into the bearing, he said no.

when would there be different size crank journals anyway???
for a REALLY beefed up brgs 5hp???

dont mean to call you out tyler, but im just confused about the difference...
BAMBY

 

[jr dragster T]

Well I wasnt sure about the difference. The guy at Dyno cams told you. One is force oil'd and one isnt. Its up to you.

 

[BAMBY]

hey tyler, you came across as offended there on your last post,
i didnt mean to offend you, if i did im sorry.

which one would you choose??? theyre the same price.
BAMBY

@tyler PS: happy birthday

 

[jr dragster T]

Hey, No worrys. Personally I would go for the forced oil setup. You cant go wrong. Remember in a running engine at 4000 RPM or so the oil is a mist in the crankcase. The main purpose for the dipper is at lower RPM's.

 

[BAMBY]

good point about the dipper being for lower rpm's.

i think i like the forced oil one too. going off your low rpm idea, you could idle a lot slower and probably still get good lubrication. the valves might be a different story though.




hmmm. has anyone ever done a briggs 5 hp with full pressure lubrication like with oil galleries/galleys to the moving parts???