diff --git a/app/api/coreApi.js b/app/api/coreApi.js
index a7f8498..8ab32eb 100644
--- a/app/api/coreApi.js
+++ b/app/api/coreApi.js
@@ -144,15 +144,15 @@ function shouldCacheTransaction(tx) {
 
 
 function getBlockchainInfo() {
-	return tryCacheThenRpcApi(miscCache, "getBlockchainInfo", 10000, rpcApi.getBlockchainInfo);
+	return tryCacheThenRpcApi(miscCache, "getBlockchainInfo", 10 * 1000, rpcApi.getBlockchainInfo);
 }
 
 function getNetworkInfo() {
-	return tryCacheThenRpcApi(miscCache, "getNetworkInfo", 10000, rpcApi.getNetworkInfo);
+	return tryCacheThenRpcApi(miscCache, "getNetworkInfo", 10 * 1000, rpcApi.getNetworkInfo);
 }
 
 function getNetTotals() {
-	return tryCacheThenRpcApi(miscCache, "getNetTotals", 10000, rpcApi.getNetTotals);
+	return tryCacheThenRpcApi(miscCache, "getNetTotals", 10 * 1000, rpcApi.getNetTotals);
 }
 
 function getMempoolInfo() {
@@ -160,7 +160,7 @@ function getMempoolInfo() {
 }
 
 function getMiningInfo() {
-	return tryCacheThenRpcApi(miscCache, "getMiningInfo", 30000, rpcApi.getMiningInfo);
+	return tryCacheThenRpcApi(miscCache, "getMiningInfo", 30 * 1000, rpcApi.getMiningInfo);
 }
 
 function getUptimeSeconds() {
@@ -168,7 +168,7 @@ function getUptimeSeconds() {
 }
 
 function getChainTxStats(blockCount) {
-	return tryCacheThenRpcApi(miscCache, "getChainTxStats-" + blockCount, 1200000, function() {
+	return tryCacheThenRpcApi(miscCache, "getChainTxStats-" + blockCount, 20 * 60 * 1000, function() {
 		return rpcApi.getChainTxStats(blockCount);
 	});
 }
@@ -512,7 +512,7 @@ function getMempoolStats() {
 				var fee = txMempoolInfo.modifiedfee;
 				var size = txMempoolInfo.vsize ? txMempoolInfo.vsize : txMempoolInfo.size;
 				var feePerByte = txMempoolInfo.modifiedfee / size;
-				var satoshiPerByte = feePerByte * 100000000;
+				var satoshiPerByte = feePerByte * 100000000; // TODO: magic number - replace with coinConfig.baseCurrencyUnit.multiplier
 				var age = Date.now() / 1000 - txMempoolInfo.time;
 
 				var addedToBucket = false;
diff --git a/app/coins/btc.js b/app/coins/btc.js
index a456268..780d67e 100644
--- a/app/coins/btc.js
+++ b/app/coins/btc.js
@@ -63,6 +63,7 @@ module.exports = {
 		"https://raw.githubusercontent.com/blockchain/Blockchain-Known-Pools/master/pools.json"
 	],
 	maxBlockWeight: 4000000,
+	maxBlockSize: 1000000,
 	targetBlockTimeSeconds: 600,
 	currencyUnits:currencyUnits,
 	currencyUnitsByName:{"BTC":currencyUnits[0], "mBTC":currencyUnits[1], "bits":currencyUnits[2], "sat":currencyUnits[3]},