What's the difference between a regular SBC and the "SB2?"
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Joined: Jul 2001
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From: Western PA
Car: 1986 IROC-Z
What's the difference between a regular SBC and the "SB2?"
I've been hearing some things about the "SB2." What exactly is this? I gather it's some type of update to the traditional small-block Chevy motor, but there's really not much information on it on the Internet. What's so special about it, and how does it differ from the 1955 design?
Supreme Member
Joined: Jan 2002
Posts: 3,852
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From: Valley of the Sun
Car: 82 Z28
Engine: Al LT1 headed LG4 305
Transmission: TH350
Axle/Gears: 3.73 posi with spacer
Its a race block, shares little with a SBC, IIRC its based upon a SBC architecture though. You don't want it unless you have loads to spend and are a masocist.
http://www.gm.com/company/racing/tec.../SB2Engine.htm
http://popularmechanics.com/automoti...e/index2.phtml
http://www.gm.com/company/racing/tec.../SB2Engine.htm
http://popularmechanics.com/automoti...e/index2.phtml
Last edited by ME Leigh; Oct 29, 2004 at 10:53 AM.
Joined: Mar 2000
Posts: 43,187
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From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Further proof to the claim that there is very little "stock" in stock car racing.
Thread Starter
Joined: Jul 2001
Posts: 1,000
Likes: 1
From: Western PA
Car: 1986 IROC-Z
Hmm, that's really interesting. The two-piece intake manifold is a neat idea, but I guess a lot of the SB2's key features/advantages are useful only to racing teams that take them apart constantly.
Looks very expensive.
Looks very expensive.
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Joined: Sep 2003
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The heads and intake are incredible, the best they can possibly be without being a completely splayed valve symmetrical port setup.
If you have to run a single central 4-barrel carb or throttle body, that is the best.
The heads and intake aren't that much more expensive than high quality racing heads. The parts that are necessary to runs these heads though, like adapted lifters if you don't have the SB2 block, can rack up costs but they are production (not to imply mass, I think Comp makes a set of solid roller lifters that are offset to work).
If I were going to run these heads, I would wait for this place:
http://www.musclemotorsports.com/eng...--intakes.html
...to get a set of used Nascar short track or road race ported heads to use on a ~400+cid small block.
They come with titanium valves & retainers, but you would need your own springs for whatever cam you would run.
The ports/runners would still be too big for even a very high performance street oriented 350 or ~383cid engine, so you'd have to run bigger cubic inches to make use of them.
If you have to run a single central 4-barrel carb or throttle body, that is the best.
The heads and intake aren't that much more expensive than high quality racing heads. The parts that are necessary to runs these heads though, like adapted lifters if you don't have the SB2 block, can rack up costs but they are production (not to imply mass, I think Comp makes a set of solid roller lifters that are offset to work).
If I were going to run these heads, I would wait for this place:
http://www.musclemotorsports.com/eng...--intakes.html
...to get a set of used Nascar short track or road race ported heads to use on a ~400+cid small block.
They come with titanium valves & retainers, but you would need your own springs for whatever cam you would run.
The ports/runners would still be too big for even a very high performance street oriented 350 or ~383cid engine, so you'd have to run bigger cubic inches to make use of them.
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