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Author Topic:   355 to377 what gear?
JT54
Dirt Maniac

Total posts: 170
posted October 14, 2004 01:43 AM  
I am going fromm a 6 inch rod 355 to a 6 inch rod 377 .....run on fast 1/4 mile high bank will I have to make a gear change ?

FASTLAP
Dirt Maniac

Total posts: 171
posted October 14, 2004 03:56 AM  
I wouldn't think so, only reason is the crank is the same, just more cubes. What were you turning with the 355? jmo

NJantz
Dirt Forum Champ
Total posts: 755
posted October 14, 2004 08:47 AM  
You probably don't need a gear change. On a 1/4mile I'll usually turn about 300rpm less with my 355. Really depends on the torque/horsepower curves each engine develops. So to answer your question I'd leave the same gear in it. You'll be close.

JT54
Dirt Maniac

Total posts: 170
posted October 14, 2004 02:09 PM  
I dont want to say what gear I ended up running because some of my "friends" from home get on here and gearing is everything on our track.....I will say that I changed gears a couple of times throughout the season with the 355 working toward getting it to turn consistant 7200 max but most nights I would not get over 7000 ....I was considering going one step higher numericaly in gear ratio but funds did not allow it.....I always felt on restarts and stop and go trafic I could have used a little more bottom end .....anyway it sounds like the extra cubes might sute the gears I have now.......we will see....thanks for your help.

A2KY2K88
Dirt Maniac

Total posts: 141
posted October 14, 2004 10:00 PM  
go with a 5.7 rod on that small of a track.

JT54
Dirt Maniac

Total posts: 170
posted October 15, 2004 12:46 AM  
I have the 6 inch rods already ,but I also have a set of 5.7 gmX rods ,do you think they will hold up verry well? if so all I need to buy is pistons.

dirtywrench13
Dirt Freak

Total posts: 324
posted October 15, 2004 12:06 PM  
TRY A CAM CHANGE BEFORE YOU CHANGE THE RODS. IT MAY ALSO HELP WITH WITH THE BOTTOM END (START&STOP). I'VE ALWAYS BEEN TOLD THE HIGHER GEARS ARE A CRUTCH FOR A CAR THATS UNDER POWERED OR THE SET UP IS OFF.

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