421 sbc

Old 03-18-2009, 07:13 PM
  #11  
hink
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The SHP block would save you about 600 dollars over a Little-M Sportsman block.

Here are some links on those blocks.

http://speedtalk.com/forum/viewtopic.php?t=12112

http://www.chevelles.com/forums/showthread.php?t=237241
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Old 03-19-2009, 05:22 PM
  #12  
FullTimeRacing
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it's not that i get insulted.I do agree that a 421 is out of the ? But a strong 406 is a nice motor for the average guy running low 11's to low 10's .

what's the H/P limit,Is it 600hp 550hp? If you have a nice block. Splayed caps,studedmains ,studed heads,and rok block

That motor that lost the mains (http://forums.racingjunk.com/viewtopic.php?t=8335)In this thread must have been making lots of power,But how much?
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Old 03-19-2009, 07:44 PM
  #13  
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Originally Posted by montecarlo84
it's not that i get insulted.I do agree that a 421 is out of the ? But a strong 406 is a nice motor for the average guy running low 11's to low 10's .

what's the H/P limit,Is it 600hp 550hp? If you have a nice block. Splayed caps,studedmains ,studed heads,and rok block

That motor that lost the mains (http://forums.racingjunk.com/viewtopic.php?t=8335)In this thread must have been making lots of power,But how much?
The dart SHP block is rated at 600 horse and be dependable and a 400 block at 600 I would have to say is not as dependable as the Dart from what I have seen over the years.
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Old 03-19-2009, 08:59 PM
  #14  
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WoW!!,
Carl 600HP, that's all Dart rates the SHP blk too. Now you got my curiosity up, what do they rate a Little "M" blk at, and what's the major difference in the blks.

Zip.
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Old 03-20-2009, 03:12 AM
  #15  
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Originally Posted by zipper06
WoW!!,
Carl 600HP, that's all Dart rates the SHP blk too. Now you got my curiosity up, what do they rate a Little "M" blk at, and what's the major difference in the blks.

Zip.
After looking at the SHP I would say 700 would be the max on that block, The Little-M Sportsman block is rated at 900 horse according to Dart.

The SHP has less nickel content and does not have the heavy bulk heads on the front and rear and they have 3/8 outter splayed bolts and a little less cylinder wall as well.

It will take the GM spider for HYD roller cam set ups
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Old 03-20-2009, 08:37 PM
  #16  
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So what block are the guys making 1200-2000HP sbc's suppose to be using? My friend has a 400 sbc Little M block with a blower. Has been running it for 4-5 years in his dragster no block issue's.
Runs 4.50's 1/8th 1900Lb Dragster.
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Old 03-20-2009, 09:57 PM
  #17  
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I read on the dartshp.com site the shp is good to 600 hp.

so i joined and asked what the maximum hp is .

waiting for a answer
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Old 03-20-2009, 10:06 PM
  #18  
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Originally Posted by us7race
So what block are the guys making 1200-2000HP sbc's suppose to be using? My friend has a 400 sbc Little M block with a blower. Has been running it for 4-5 years in his dragster no block issue's.
Runs 4.50's 1/8th 1900Lb Dragster.

dart makes 4 iron blocks, shp,little m sportsman,little m,and iron eagle.

i would say iron eagle or the alumium block.
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Old 03-21-2009, 06:57 AM
  #19  
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Originally Posted by montecarlo84
I read on the dartshp.com site the shp is good to 600 hp.

so i joined and asked what the maximum hp is .

waiting for a answer
After looking at the SHP I would say 700 would be the max on that block, The Little-M Sportsman block is rated at 900 horse according to Dart.

The SHP has less nickel content and does not have the heavy bulk heads on the front and rear and they have 3/8 outter splayed bolts and a little less cylinder wall as well.

It will take the GM spider for HYD roller cam set ups
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Old 03-22-2009, 07:34 PM
  #20  
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I also read on the dart forum that a few of the blocks have had main journal alinement issues,so they all have to be checked when you buy one
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