Author Topic: Stroking... Is it good idea ?  (Read 1043 times)

Offline Aussie Challenger

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Re: Stroking... Is it good idea ?
« Reply #15 on: May 17, 2017 - 07:47:19 am »
Don't let us forget that the factory did, "stroke" their engines as well as boring them, towit the 273,318,340 and 360- all in the same exterior sized cylinder case. The wear factor is exacerbated with smaller rod/stroke ratios as CP mentioned and that's why the Chev 400 wasn't as successful as the 350s since it ran a 5.56" rod versus a 5.7 and that caused side loading of the piston and reduced engine length. A Chrysler runs a 6.123" rod so you're better right out of the gate. Higher piston speeds are an issue, but with todays honing methods and coated pistons, it can be reduced quite a bit. Proper fuel ratios are also a big part of longer engine life. Just my  :2cents:
Don't forget that the SB Chev was a very weak casting compared to the MOPAR SB and the 400 SB Chev had heat issues when pushed.
MOPAR spent a lot of time developing their SB and as usual got it right.
Most manufacturers didn't want anything much bigger than the BB's they had already, it was really only the HOT ROD guy's wanting more displacement from a lighter and more compact package that saw stroking become more popular. Component manufacturers soon got on the band wagon producing what was needed.   :burnout:
Dave




Offline V02Barracuda

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Re: Stroking... Is it good idea ?
« Reply #16 on: May 22, 2017 - 09:12:05 pm »
The original question was, Stroking - is it a good idea?  Here's the short answer.  If you're drag racing the car, then yes, it's a great idea.  If you're driving the car daily to work or for pleasure or to a show, then I would recommend not stroking it.  The piston speed isn't the thing that bothers me so much.  It's the fact that the piston isn't staying square in it's bore half way down.  Too much side loading was enough to turn me off.  That's my 2 cents.  Good luck.

Offline 1 Wild R/T

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Re: Stroking... Is it good idea ?
« Reply #17 on: May 23, 2017 - 01:19:23 am »
The original question was, Stroking - is it a good idea?  Here's the short answer.  If you're drag racing the car, then yes, it's a great idea.  If you're driving the car daily to work or for pleasure or to a show, then I would recommend not stroking it.  The piston speed isn't the thing that bothers me so much.  It's the fact that the piston isn't staying square in it's bore half way down.  Too much side loading was enough to turn me off.  That's my 2 cents.  Good luck.


With the rod ratios in Mopar Strokers being better than the rod ratio Stock Stock motors from other manufacturers I'd say the side loading isn't much of an issue...  If you are really concerned perhaps a little reading will calm your fears..

http://www.enginebuildermag.com/2016/08/understanding-rod-ratios/
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Offline xtopfuel

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Re: Stroking... Is it good idea ?
« Reply #18 on: May 23, 2017 - 04:52:31 am »
 :iagree:
engine builders magazine is an excellent magazine for real knowledge