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44's are too small to make the best peak power with. 46's are ok but 48's would be best for big peak power numbers on a 1500cc+ zx14 engine.
Its really about thetotal port taper not just the added raw cfm number. Taper is good for peak power.

I would at least thin the shafts on the 44's.

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Harry(northernkaw) is doing 46s now isnt he?

Jim, do you do bored TBs?

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One thing I read in this thread I want to comment on, the head gasket issues with bored cylinders...

When using MLS head gaskets you need to have a FLAT surface. MLS head gaskets are designed to "float" the head. During warm up and cool down the head and bores heat up at different rates. Under heavy load they also have a great degree of temp differential.

The GM LS-x engines also use this MLS style head gaskets and head gasket reliability has improved dramatically vs the composite gaskets that the traditional SBC used. You will notice that engines that use MLS head gaskets have thinner reduced shank head bolts. This is to keep the clamping force more even and consistent during all operating conditions.

So with that said, MLS head gaskets need much smoother surfaces to function properly.
I recommend lapping the heads deck surface and removing the cutter marks from the resurfacer. This also makes the surface flatter. Also, and this is VERY important and missed by almost all builders, the block needs to be just as flat.

The problem is that the block material between the cylinders gets hotter than the rest of the bore because these are Siamese bores. When the aluminum cools it shrinks more than the material around the rest of the bores. This is why when you put your straight edge ( I hope you all have one of those) across the bores you will see a shrinkage and thus a gap at the adjoining bores. You need to lap the block deck surface or the clamping force between the bores will be less than the rest of the deck surface.

From what I have seen, the shrinkage usually stabilizes on a seasoned block once its lapped properly. but if the block is subjected to elevated temps like a turbo or nitrous at some point in the future then rechecking is a good idea and re lap the block if needed.

This should cure any sealing issues. We make our own hand lapping plates here and they weigh about 15 pounds and are precision ground to be perfectly flat. they have two handles to make them easy to use. We sell them to other shops, if you would like one. I don't know of anyone else making or selling them.

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Roy, 9-5 m-f 9-12 on sat.

I have a seperate line from the rest of the shop, so if I dont answer leave a message, I'm out in the shop and the noise from the dyno and all the machines running gets quite loud during the day with 9 guys.

Bill just put in a new waste oil furnace and thats loud now and adds to the noise.

Bill, give me a shout on the lapping plate. 860-274-0631 we have one left and are working on a new batch. I think Bill makes them 5 at a time.

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How does this new CompetitionCNC head differ from the 210+ Carpenter head package? And what about price?

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Roy did you have your throtle bodies bored at the same time you did the stroker or before..........if it was done before or after the stroker i'm just curious what kind of difference you noticed,,,,,,,,,,,,also how long have you had the stroker. and what type of difference would you describe that as.........you real happy with it?

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