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Building a 360 ci. 2bbl. Is a bbss better on a tight track ? Running in a b mod class. Also is it good to do in a stock 400 block ? And would you use 200 runners ?
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In my opinion, if you are building a new bbss engine:
Put it in an aftermarket block. It is an insurance policy.
These motors like rpm and you need to look at keeping rotating weight to a minimum and use good valve train parts for the rpm needed.
Depending on the quality of parts and rpm able to be run, I would use a little bigger head. I have this setup with 215 heads and it is not lazy anywhere and runs great on the track. I also had a 14 degree engine like this: awesome.
Different people will have different opinions on this subject and ultimately, you will need to decide.
Good luck. -
An advantage of the larger bore is more room between the cylinder wall and valve so flow is better. The down side may be the block.Comment
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2 barrel carb.. max 200cc runners. oem vortecs would be better than dart or other aftermarket 200s with a 2 barrel. vortec bowties are better yet.
Id build a normal 360 not a short stroke big bore with a 2 barrel. Still using as light of parts as you can afford. Including tool steel 55 gram lifters, hollow intake valves etc.
big bore short stroke motors have very little torque and need an extra 1000 rpm or so, which your 2 barrel wont flow.Comment
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True....and most stock classes don't let you fool with the chamber to accommodate the larger bore anyway.TBComment
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I have two 12oz glasses. One is 6 inches tall and the other is 1 inch tall.
Which one holds more water?
Which one can I fill faster?BUCKLE UP NOW, YA HEAR?
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lre is right
people think the bbss motors lack the torque
they are fear mongers
the displacement is the same
but guess what, the bbss motor cuts down on friction and allows for less valve shrouding
there may be minor torque differences from the fact that the bbss motor uses as long or longer rods than the standard motor
id go bbss any day, make sure you use the thinnest rings you can get your grubby hands on,
sending pistons to rebco machine for
verticle gas ports (methanol motors only)
lateral gas ports (gas engines)
is a great idea.
or you can order them that way from je/cp/whoeverComment
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torque is some what considered leverage, a longer pry bar can lift the same load easier than a short pry bar, ie:crank pin center in relation to main center or stroke . if I were limited to a 2 brl carb, which normally means 6500rpms, I would go with longer stroke. now you start adding 4brl tricked out carbs and big heads with the valves stood up and turning8000 plus rpm,s , and the ssbb is better. your rules really determine what is best, JMO....Comment
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What crank angle does peak pressure occur at?Originally posted by fastford View Post
It is long before the rod and crank throw reach 90 degrees.
This minimizes the effect your speaking ofComment
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Look at our web, we gas port pistons, as well as compression balance grooves to go along with them.
...www.tonybarkerracingengines.com......Comment
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Originally posted by TBRE View Post
How much do you charge?
Rebco has 6 mills setup just for piston operationsComment
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Same as the piston companies do, $15.00 per piston, and $6.00 for CB groove.TBComment
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Compression balance groove? Thats a new term to me.I have heard of an accumulater groove.Is that what you are referring too?Comment
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No, it's a groove around the top of the ring land connecting the gas ports.TBComment
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The only drawback to running lateral gas ports is when the piston rocks, it tries to shut off the thrust sides from the cylinder pressure, this fixes that, and obviously helps keep the piston "centered" in the bore.TBComment
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