511 bbc vs 434 sbc
09-15-2010, 03:43 PM
#21
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No Slam on Turbos but I have LUSTED after a Tunnel Rammed or Roots Blown since 1990.
I was in college & attended the Super Chevy Show at Norwalk and have pined for a fast street/strip Pro-Street car since.
I love the Roots Blower, read last month's Car Craft.
I was in college & attended the Super Chevy Show at Norwalk and have pined for a fast street/strip Pro-Street car since.
I love the Roots Blower, read last month's Car Craft.
09-15-2010, 06:11 PM
#22
I know I mentioned a 511 BBC(based on the 427/454) or 434 SBC, However given the availability & durability of the 502 marine block BBC this is pushing me away from aftermarket SBCs and smaller production 396/402/427/454 BBCs.
I have heard the 502 can handle 1000+ HP & can be overbored to 4.56 if it sonic checks.
I have talked to a few racers/show car guys who swear by Roots blowers.
I was thinking a 6-71 Blower/ Intercooler (overdriven 11-20% for 10-12 lbs of boost) and a 472 CID [destroked 502,using std 4.468 bore 8.75:1 pistons, 6.385 inch forged rods,and a 396/402/427 steel 3.766 inch crank] for an easy 600-800 HP w/o N2O and possibly more with a N2O fogger.
Wouldn't this path be easier/cheaper in the long run than a High CR,Tunnel Rammed, solid roller cammed, 509-557 CID, N2O injected engine?
I have heard the 502 can handle 1000+ HP & can be overbored to 4.56 if it sonic checks.
I have talked to a few racers/show car guys who swear by Roots blowers.
I was thinking a 6-71 Blower/ Intercooler (overdriven 11-20% for 10-12 lbs of boost) and a 472 CID [destroked 502,using std 4.468 bore 8.75:1 pistons, 6.385 inch forged rods,and a 396/402/427 steel 3.766 inch crank] for an easy 600-800 HP w/o N2O and possibly more with a N2O fogger.
Wouldn't this path be easier/cheaper in the long run than a High CR,Tunnel Rammed, solid roller cammed, 509-557 CID, N2O injected engine?
Roots blowers are cool and all but they are also very inefficient and tend to heat soak badly, making them somewhat inconsistent. If you do want to go with a supercharger, go with a centrifugal and forget about the nitrous. You can make 1000hp on pump gas with a blown BBC without nitrous. Just to give you some ideas, look up Steve Morris Race Engines to see his Procharged Big Blocks that make over 1600hp on pump gas. Nitrous is just a little too volatile for my taste, but whatever floats your boat.
