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351w max rpms with forged internals?

  • Thread starter Thread starter ryan7662
  • Start date Start date Sep 26, 2009
R

ryan7662

Member
Sep 15, 2007
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Sep 26, 2009
#1
  • Sep 26, 2009
  • #1
How many rpms do you guys think a 351w can safely handle with forged internals? Still deciding between a 383 or 408 but either way I'll have a eagle forged crank and rods. Pistons will be forged Keith Blacks. Was thinking about arp main cap bolts and a main cap girdle to help solve any cap walk problems. My twin Borg Warner 55mm turbos might not make full boost till 3-3500rpm and that's why I'm wondering how many rpms I can safely spin. Any help would be greatly appreciated.
 

tannerc91gt

This last 25% is foreign territory at this point
Founding Member
Nov 29, 1999
4,392
2,967
234
Indiana
Sep 26, 2009
#2
  • Sep 26, 2009
  • #2
The rest of your set up is key. H/c/I?
 

lincoln+ford

Member
Jul 4, 2009
195
0
16
Sep 26, 2009
#3
  • Sep 26, 2009
  • #3
Ive seen 6800rpms from a 408w but they also were only making 470whp.
 
3

304billet

Member
Sep 16, 2005
315
0
16
Sep 27, 2009
#4
  • Sep 27, 2009
  • #4
forget the KB junk. Go probe, diamond, JE, CP or Ross. Go Scat 4340 crank, Scat 4340 Pro i beam rods, neutral balance to spin high. look at the high hp engines on nmraracing.com. no one runs KB.

u s/b putting this turboed beast in a 69-74 351W block for up to 1000fwhp. any higher than that u need a Boss 351, R351 or dart race block. u could easily spin to 9000rpm in a neutreal balanced race block with a solid roller. HR would be limited to 7K.
 
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