Blow it or Stroke it... Which is better?
#31
04-30-2009, 08:47 AM
Join Date: Mar 2004
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From all the numbers I've run in desk top dyno, a 408 can give you right around 100 ftlb more torque than stock. So what this means is if you kept the stroker motor at the same compression ratio as stock and used the stock cam, heads and other stock components you will get an extra 100 ftlb of torque over stock. Now by chaning out the cam and head and doing all the other performance stuff your going to see more power. You can check my 408 build at https://dodgeforum.com/forum/2nd-gen-...-has-come.html 
Yeah the 426 would be fun for a hot rod but since this is a daily driver it does have to be reliable. I was playing with the numbers on desk top dyno and it's looking like 394HP @ 4500rpm and 544TQ @ 2000rpm. But the real test will be when its all done and on the rollers!
#32
05-01-2009, 12:10 AM
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#33
05-01-2009, 12:18 PM
Champion
#34
05-01-2009, 12:51 PM
Champion
#35
05-01-2009, 01:51 PM
MUST run a blow off with boost!
Running boost you have sealed pipework between the blower/turbo and the tb.
After taking the rpms up and building boost when you let off the throttle and close the butterflies without a blow off or pressure relief you can/will bend the shafts of the butterflies due to still having boost trapped in the pipework. When you give it gas again the bent shaft will cause the throttle to stick in the open position when you let off the next time.
Not exactly a good thing
If you need to rebuild the motor, may as well stroke it and go for lower compression incase you want to add boost later as others have mentionded. Be smart to add trans rebuild/upgrade to your budget as well as dyno tuning. Hp is very addictive. Most ended up going to higher hp than originally intended and have to change plans as they progress. Requiring more & more parts needing to be replaced.
Running boost you have sealed pipework between the blower/turbo and the tb.
After taking the rpms up and building boost when you let off the throttle and close the butterflies without a blow off or pressure relief you can/will bend the shafts of the butterflies due to still having boost trapped in the pipework. When you give it gas again the bent shaft will cause the throttle to stick in the open position when you let off the next time.
Not exactly a good thing
If you need to rebuild the motor, may as well stroke it and go for lower compression incase you want to add boost later as others have mentionded. Be smart to add trans rebuild/upgrade to your budget as well as dyno tuning. Hp is very addictive. Most ended up going to higher hp than originally intended and have to change plans as they progress. Requiring more & more parts needing to be replaced.
#36
05-01-2009, 02:23 PM
Champion
#37
05-02-2009, 02:40 AM
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#39
05-02-2009, 12:36 PM
Legend