Visit The Dirt Forum for More Information

Author Topic:   flywheel ?
mark akins
Dirt Maniac

Total posts: 131
posted June 18, 2005 02:27 PM  
can i use a 153 teeth flywheel on my 355 chevy motor ? it is not internally balanced and, casting number on the flywheel is d1563 gm2 8781021 also i do not know what it was off of thanks mark

racer17j
Dirt Forum Champ
Total posts: 5390
posted June 18, 2005 04:00 PM  
it bolts up and the starter works but i was worried about the weight . i do not have much knowlege about balancing . i did not get balancing on this motor(does this matter) thanks mark

[This message has been edited by mark akins (edited June 18, 2005).]

iowatoolman
Dirt Freak

Total posts: 369
posted June 18, 2005 08:14 PM  
all factory 355's are internally balanced unless you running an aftermarket crank
265,283,305,327,350 are all internally balaced
and 400's are externally balanced
and yes balancing is very important

drive hard or drive home

mark akins
Dirt Maniac

Total posts: 131
posted June 18, 2005 08:31 PM  
my crank is a speedway cast steel i believe it is the same as stock ? but i am not sure any advice would help


thanks mark

racer17j
Dirt Forum Champ
Total posts: 5390
posted June 18, 2005 11:11 PM  
do you think it will be good to run since ihave the motor together and in the car ? i plan on running 8 races then in the winter i will tear down and get it balanced

thanks mark

iowatoolman
Dirt Freak

Total posts: 369
posted June 19, 2005 08:41 PM  
sure go for it

leapinlizard
Dirt Freak

Total posts: 402
posted June 20, 2005 08:43 AM  
(all factory 355's are internally balanced unless you running an aftermarket crank
265,283,305,327,350 are all internally balaced
and 400's are externally balanced
and yes balancing is very important\


Wrong. Plain wrong. There weren't any factory 355's. Engines from 55 thru 67 were two piece seal design and external balance. From 68 thru 86 most were internal and after 86 the one piece seal was used and external. Small 'wheels use straight bolt pattern starters while large 'wheels use the big body staggered pattern. You can drill for either but most blocks already have a hole here. Look at the 'wheel itself. If there is a counter balance on it, the original engine was external. Otherwise internal. Early external stuff used a bigger bolt pattern on the crank than the proceding years till 86.

Mark, if you have a exteranal balance engine, you need the proper flexplate/flywheel. Although it probably will last 8 races. Just expect some extra wear and vibration.

[This message has been edited by leapinlizard (edited June 20, 2005).]

Back to the Archives