diff --git a/substrate/bin/node-template/runtime/src/lib.rs b/substrate/bin/node-template/runtime/src/lib.rs
index 62e6515807..20780511ae 100644
--- a/substrate/bin/node-template/runtime/src/lib.rs
+++ b/substrate/bin/node-template/runtime/src/lib.rs
@@ -123,16 +123,19 @@ parameter_types! {
 	pub const BlockHashCount: BlockNumber = 250;
 	/// We allow for 2 seconds of compute with a 6 second average block time.
 	pub const MaximumBlockWeight: Weight = 2_000_000_000_000;
-	pub const ExtrinsicBaseWeight: Weight = 10_000_000;
+	/// Executing 10,000 System remarks (no-op) txs takes ~1.26 seconds -> ~125 µs per tx
+	pub const ExtrinsicBaseWeight: Weight = 125_000_000;
 	pub const AvailableBlockRatio: Perbill = Perbill::from_percent(75);
 	pub const MaximumBlockLength: u32 = 5 * 1024 * 1024;
 	pub const Version: RuntimeVersion = VERSION;
 	/// This probably should not be changed unless you have specific
 	/// disk i/o conditions for the node.
 	pub const DbWeight: RuntimeDbWeight = RuntimeDbWeight {
-		read: 25_000_000, // ~25 µs
-		write: 100_000_000, // ~100 µs
+		read: 25_000_000, // ~25 µs @ 200,000 items
+		write: 100_000_000, // ~100 µs @ 200,000 items
 	};
+	/// Importing a block with 0 txs takes ~5 ms
+	pub const BlockExecutionWeight: Weight = 5_000_000_000;
 }
 
 impl system::Trait for Runtime {
@@ -164,7 +167,7 @@ impl system::Trait for Runtime {
 	type DbWeight = DbWeight;
 	/// The weight of the overhead invoked on the block import process, independent of the
 	/// extrinsics included in that block.
-	type BlockExecutionWeight = ();
+	type BlockExecutionWeight = BlockExecutionWeight;
 	/// The base weight of any extrinsic processed by the runtime, independent of the
 	/// logic of that extrinsic. (Signature verification, nonce increment, fee, etc...)
 	type ExtrinsicBaseWeight = ExtrinsicBaseWeight;
diff --git a/substrate/bin/node/bench/src/import.rs b/substrate/bin/node/bench/src/import.rs
index ed40f1b459..1fd2bbdecc 100644
--- a/substrate/bin/node/bench/src/import.rs
+++ b/substrate/bin/node/bench/src/import.rs
@@ -49,16 +49,20 @@ pub enum SizeType {
 	Large,
 	#[display(fmt = "full")]
 	Full,
+	#[display(fmt = "custom")]
+	Custom,
 }
 
 impl SizeType {
-	fn transactions(&self) -> usize {
+	pub fn transactions(&self) -> usize {
 		match self {
 			SizeType::Empty => 0,
 			SizeType::Small => 10,
 			SizeType::Medium => 100,
 			SizeType::Large => 500,
 			SizeType::Full => 4000,
+			// Custom SizeType will use the `--transactions` input parameter
+			SizeType::Custom => 0,
 		}
 	}
 }
@@ -66,6 +70,7 @@ impl SizeType {
 pub struct ImportBenchmarkDescription {
 	pub profile: Profile,
 	pub key_types: KeyTypes,
+	pub block_type: BlockType,
 	pub size: SizeType,
 }
 
@@ -90,6 +95,12 @@ impl core::BenchmarkDescription for ImportBenchmarkDescription {
 			KeyTypes::Ed25519 => path.push("ed25519"),
 		}
 
+		match self.block_type {
+			BlockType::RandomTransfersKeepAlive(_) => path.push("transfer_keep_alive"),
+			BlockType::RandomTransfersReaping(_) => path.push("transfer_reaping"),
+			BlockType::Noop(_) => path.push("noop"),
+		}
+
 		path.push(&format!("{}", self.size));
 
 		path
@@ -101,7 +112,7 @@ impl core::BenchmarkDescription for ImportBenchmarkDescription {
 			50_000,
 			self.key_types
 		);
-		let block = bench_db.generate_block(BlockType::RandomTransfers(self.size.transactions()));
+		let block = bench_db.generate_block(self.block_type);
 		Box::new(ImportBenchmark {
 			database: bench_db,
 			block,
@@ -110,16 +121,11 @@ impl core::BenchmarkDescription for ImportBenchmarkDescription {
 	}
 
 	fn name(&self) -> Cow<'static, str> {
-		match self.profile {
-			Profile::Wasm => format!(
-				"Import benchmark (random transfers, wasm, {} block)",
-				self.size,
-			).into(),
-			Profile::Native => format!(
-				"Import benchmark (random transfers, native, {} block)",
-				self.size,
-			).into(),
-		}
+		format!(
+			"Import benchmark ({:?}, {:?})",
+			self.block_type,
+			self.profile,
+		).into()
 	}
 }
 
@@ -159,4 +165,4 @@ impl core::Benchmark for ImportBenchmark {
 
 		elapsed
 	}
-}
\ No newline at end of file
+}
diff --git a/substrate/bin/node/bench/src/main.rs b/substrate/bin/node/bench/src/main.rs
index 27c9358f9d..e627f07c3d 100644
--- a/substrate/bin/node/bench/src/main.rs
+++ b/substrate/bin/node/bench/src/main.rs
@@ -26,7 +26,7 @@ use crate::core::{run_benchmark, Mode as BenchmarkMode};
 use crate::tempdb::DatabaseType;
 use import::{ImportBenchmarkDescription, SizeType};
 use trie::{TrieReadBenchmarkDescription, TrieWriteBenchmarkDescription, DatabaseSize};
-use node_testing::bench::{Profile, KeyTypes};
+use node_testing::bench::{Profile, KeyTypes, BlockType};
 use structopt::StructOpt;
 
 #[derive(Debug, StructOpt)]
@@ -49,9 +49,13 @@ struct Opt {
 	/// Run with `--list` for the hint of what to filter.
 	filter: Option<String>,
 
+	/// Number of transactions for block import with `custom` size.
+	#[structopt(long)]
+	transactions: Option<usize>,
+
 	/// Mode
 	///
-	/// "regular" for regular becnhmark
+	/// "regular" for regular benchmark
 	///
 	/// "profile" mode adds pauses between measurable runs,
 	/// so that actual interval can be selected in the profiler of choice.
@@ -66,38 +70,38 @@ fn main() {
 		sc_cli::init_logger("");
 	}
 
+	let mut import_benchmarks = Vec::new();
+
+	for profile in [Profile::Wasm, Profile::Native].iter() {
+		for size in [
+			SizeType::Empty,
+			SizeType::Small,
+			SizeType::Medium,
+			SizeType::Large,
+			SizeType::Full,
+			SizeType::Custom,
+		].iter() {
+			let txs = match size {
+				SizeType::Custom => opt.transactions.unwrap_or(0),
+				_ => size.transactions()
+			};
+			for block_type in [
+				BlockType::RandomTransfersKeepAlive(txs),
+				BlockType::RandomTransfersReaping(txs),
+				BlockType::Noop(txs),
+			].iter() {
+				import_benchmarks.push((profile.clone(), size.clone(), block_type.clone()));
+			}
+		}
+	}
+
 	let benchmarks = matrix!(
-		profile in [Profile::Wasm, Profile::Native].iter() =>
+		(profile, size, block_type) in import_benchmarks.iter() =>
 			ImportBenchmarkDescription {
 				profile: *profile,
 				key_types: KeyTypes::Sr25519,
-				size: SizeType::Medium,
-			},
-		ImportBenchmarkDescription {
-			profile: Profile::Wasm,
-			key_types: KeyTypes::Sr25519,
-			size: SizeType::Empty,
-		},
-		ImportBenchmarkDescription {
-			profile: Profile::Native,
-			key_types: KeyTypes::Ed25519,
-			size: SizeType::Medium,
-		},
-		ImportBenchmarkDescription {
-			profile: Profile::Wasm,
-			key_types: KeyTypes::Sr25519,
-			size: SizeType::Full,
-		},
-		ImportBenchmarkDescription {
-			profile: Profile::Native,
-			key_types: KeyTypes::Sr25519,
-			size: SizeType::Full,
-		},
-		size in [SizeType::Small, SizeType::Large].iter() =>
-			ImportBenchmarkDescription {
-				profile: Profile::Native,
-				key_types: KeyTypes::Sr25519,
 				size: *size,
+				block_type: *block_type,
 			},
 		(size, db_type) in
 			[
@@ -145,4 +149,4 @@ fn main() {
 		let json_result: String = serde_json::to_string(&results).expect("Failed to construct json");
 		println!("{}", json_result);
 	}
-}
\ No newline at end of file
+}
diff --git a/substrate/bin/node/executor/tests/submit_transaction.rs b/substrate/bin/node/executor/tests/submit_transaction.rs
index a48eea9ce8..ced85d2d4a 100644
--- a/substrate/bin/node/executor/tests/submit_transaction.rs
+++ b/substrate/bin/node/executor/tests/submit_transaction.rs
@@ -230,7 +230,7 @@ fn submitted_transaction_should_be_valid() {
 		let res = Executive::validate_transaction(source, extrinsic);
 
 		assert_eq!(res.unwrap(), ValidTransaction {
-			priority: 1_410_625_000_000,
+			priority: 1_410_740_000_000,
 			requires: vec![],
 			provides: vec![(address, 0).encode()],
 			longevity: 128,
diff --git a/substrate/bin/node/runtime/src/lib.rs b/substrate/bin/node/runtime/src/lib.rs
index 704778cc7a..d256d116d3 100644
--- a/substrate/bin/node/runtime/src/lib.rs
+++ b/substrate/bin/node/runtime/src/lib.rs
@@ -56,6 +56,7 @@ use sp_inherents::{InherentData, CheckInherentsResult};
 pub use sp_runtime::BuildStorage;
 pub use pallet_timestamp::Call as TimestampCall;
 pub use pallet_balances::Call as BalancesCall;
+pub use frame_system::Call as SystemCall;
 pub use pallet_contracts::Gas;
 pub use frame_support::StorageValue;
 pub use pallet_staking::StakerStatus;
@@ -119,14 +120,17 @@ parameter_types! {
 	pub const BlockHashCount: BlockNumber = 250;
 	/// We allow for 2 seconds of compute with a 6 second average block time.
 	pub const MaximumBlockWeight: Weight = 2_000_000_000_000;
-	pub const ExtrinsicBaseWeight: Weight = 10_000_000;
+	/// Executing 10,000 System remarks (no-op) txs takes ~1.26 seconds -> ~125 µs per tx
+	pub const ExtrinsicBaseWeight: Weight = 125_000_000;
 	pub const MaximumBlockLength: u32 = 5 * 1024 * 1024;
 	pub const Version: RuntimeVersion = VERSION;
 	pub const AvailableBlockRatio: Perbill = Perbill::from_percent(75);
 	pub const DbWeight: RuntimeDbWeight = RuntimeDbWeight {
-		read: 25_000_000, // ~25 µs
-		write: 100_000_000, // ~100 µs
+		read: 25_000_000, // ~25 µs @ 200,000 items
+		write: 100_000_000, // ~100 µs @ 200,000 items
 	};
+	/// Importing a block with 0 txs takes ~5 ms
+	pub const BlockExecutionWeight: Weight = 5_000_000_000;
 }
 
 impl frame_system::Trait for Runtime {
@@ -143,7 +147,7 @@ impl frame_system::Trait for Runtime {
 	type BlockHashCount = BlockHashCount;
 	type MaximumBlockWeight = MaximumBlockWeight;
 	type DbWeight = DbWeight;
-	type BlockExecutionWeight = ();
+	type BlockExecutionWeight = BlockExecutionWeight;
 	type ExtrinsicBaseWeight = ExtrinsicBaseWeight;
 	type MaximumBlockLength = MaximumBlockLength;
 	type AvailableBlockRatio = AvailableBlockRatio;
diff --git a/substrate/bin/node/testing/src/bench.rs b/substrate/bin/node/testing/src/bench.rs
index d05bb9a095..cdc9cc86e5 100644
--- a/substrate/bin/node/testing/src/bench.rs
+++ b/substrate/bin/node/testing/src/bench.rs
@@ -43,6 +43,7 @@ use node_runtime::{
 	constants::currency::DOLLARS,
 	UncheckedExtrinsic,
 	MinimumPeriod,
+	SystemCall,
 	BalancesCall,
 	AccountId,
 	Signature,
@@ -129,16 +130,18 @@ impl Clone for BenchDb {
 #[derive(Debug, PartialEq, Clone, Copy)]
 pub enum BlockType {
 	/// Bunch of random transfers.
-	RandomTransfers(usize),
+	RandomTransfersKeepAlive(usize),
 	/// Bunch of random transfers that drain all of the source balance.
 	RandomTransfersReaping(usize),
+	/// Bunch of "no-op" calls.
+	Noop(usize),
 }
 
 impl BlockType {
 	/// Number of transactions for this block type.
 	pub fn transactions(&self) -> usize {
 		match self {
-			Self::RandomTransfers(v) | Self::RandomTransfersReaping(v) => *v,
+			Self::RandomTransfersKeepAlive(v) | Self::RandomTransfersReaping(v) | Self::Noop(v) => *v,
 		}
 	}
 }
@@ -287,15 +290,31 @@ impl BenchDb {
 			let signed = self.keyring.sign(
 				CheckedExtrinsic {
 					signed: Some((sender, signed_extra(0, node_runtime::ExistentialDeposit::get() + 1))),
-					function: Call::Balances(
-						BalancesCall::transfer(
-							pallet_indices::address::Address::Id(receiver),
-							match block_type {
-								BlockType::RandomTransfers(_) => node_runtime::ExistentialDeposit::get() + 1,
-								BlockType::RandomTransfersReaping(_) => 100*DOLLARS - node_runtime::ExistentialDeposit::get() - 1,
-							}
-						)
-					),
+					function: match block_type {
+						BlockType::RandomTransfersKeepAlive(_) => {
+							Call::Balances(
+								BalancesCall::transfer_keep_alive(
+									pallet_indices::address::Address::Id(receiver),
+									node_runtime::ExistentialDeposit::get() + 1,
+								)
+							)
+						},
+						BlockType::RandomTransfersReaping(_) => {
+							Call::Balances(
+								BalancesCall::transfer(
+									pallet_indices::address::Address::Id(receiver),
+									// Transfer so that ending balance would be 1 less than existential deposit
+									// so that we kill the sender account.
+									100*DOLLARS - (node_runtime::ExistentialDeposit::get() - 1),
+								)
+							)
+						},
+						BlockType::Noop(_) => {
+							Call::System(
+								SystemCall::remark(Vec::new())
+							)
+						},
+					},
 				},
 				version,
 				genesis_hash,