OUCH Bye bye 403

Kennybill

Active member
Oct 3, 2018
203
127
43
Braceville Ohio
Hmmm, another thread with pictures from 10 years ago of a 403. It's like Deja vu, all over again. :)•》jmo, 403s and high rpms don't go well together. 5,500 rpms should be the top of your limit. When it goes, it really goes. I've seen lots of 425/455 let go also.
 

Olds 307 and 403

Active member
Oct 4, 2018
587
200
43
Melville, Saskatchewan
Martin was a teenager when the original Olds Power existed and an active member. His 10 to 1 403 was putting out serious power. Add a T-56 and a flimsy 403 crank this is the result. My 7.5" rear exploded in a similar fashion and situation.
 
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