393? May 18, 2013, 04:48:15 AM i have a solid 351w in the 88 sport right now im wondering if anyone has stroked these motors and what they thought? as far as power gains/ life expectancy of the motor? Quote Selected
393? Reply #1 – May 18, 2013, 10:29:29 AM What year is the block and is it a roller block?Darren Quote Selected
393? Reply #2 – May 18, 2013, 10:36:07 AM Carbed or fuel injected...didnt happen without pictures...Travis Quote Selected
393? Reply #3 – May 18, 2013, 12:51:43 PM Life expectancy of the motor? In most cases the longevity / reliabilty of the motor has a direct inversely proportionate decrease in response to horsepower increase. Quote Selected
393? Reply #4 – May 18, 2013, 03:50:04 PM Well the 210hp the fuel injected truck 351w seems to last forever....225hp 302 HO seems to last a very long time...even when installed in a mustang.Now that being said...how much HP are we talking about??? 500?Travis Quote Selected
393? Reply #5 – May 19, 2013, 04:08:04 PM its a carbed 74 351w and its flat tappet.ill try to find a picture. Quote Selected
393? Reply #7 – May 19, 2013, 07:21:21 PM Looks good...even got the AC still in it....nice.Travis Quote Selected
393? Reply #8 – May 19, 2013, 10:27:55 PM A good friend of mine back home in OK had a 70 block that was taken to a 408 with a nodular crank kit waaaay back in the late 90's. That motor ran 1/4 and 1/8 mile all summer long for 4 or 5 summers on a 125 shot every now and then and the only thing it did was require the C4 trans to be rebuilt about mid summer and then again before the next season started. They freshened the same motor up and bumped the compression to about 13:1 and it ran like that for a couple of summers and then he sold the car. He was running a 0.650"+ solid roller cam, the old high port TFS heads with some port work, a super victor intake, and a 4" exhaust with dumps.I would say a 393 kit with all the improvements they have made over the years to the stroker kits would be a no brainer with your '74 block.Darren Quote Selected
393? Reply #10 – May 22, 2013, 07:31:49 AM One little tidbit if you're having the machine work done and building the motor yourself check your clearance from rod bolts to the cyl. skirts I was helping a buddy build a 393 some time ago and he didn't have the block clearanced for the stroke he had the bottom end all together and torqued down and hand spun the motor over to check it out and noticed that he was barely sing past the lower skirt of the cylinder. If the crank was even off a smidge or somthing expanded it would have taken out the bottom of the cylinder.Just a heads up Quote Selected
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