MGB Highest Preformance Stock MGB Engine?

[PAUL161]

What year MGB had the highest performance stock engine? Someone told me the 67. Is this true? Also is it a five main block? /ubbthreads/images/graemlins/driving.gif PJ

I might be looking for another car.

 

[Steve_S]

The '67 is considered the best year engine because it had the most refinements but was pre-smog. The early 3-main engines actually rev better but have some drawbacks including oil leaks and a slightly shorter life between rebuilds. Any of the early 5-main engines ('65-'67)will be bombproof and high performance.

 

[DrEntropy]

MWUHAAHAAHAAA!!!!!!

 

[darrenb]

new to this, got 2 spare engines with the B, one has no ports on the head for smog equip, how do i find year of engine?

 

[philman]

so what about putting a head off a '67 on a later engine?

 

[JeffS]

Steve S is right about the block, but the '72-'74 cylinder head is know for the best factory flow rates and compression, with larger valves. Its the performance head of choice!

 

[PAUL161]

[ QUOTE ]
new to this, got 2 spare engines with the B, one has no ports on the head for smog equip, how do i find year of engine?

[/ QUOTE ]

Look at the engine clock. It's cast in the block below the dizzy. The double number should be the year. Hmmm, I think. PJ

 

[PAUL161]

[ QUOTE ]
Steve S is right about the block, but the '72-'74 cylinder head is know for the best factory flow rates and compression, with larger valves. Its the performance head of choice!

[/ QUOTE ]
Ok, what would be the advantage of putting a 72 head on a 67 block. What about compression ratio? Was the 67 with the stock head 9/1 verses 8/1? Does the port holes, even though plugged, in the 72 head drop the compression ratio? PJ

 

[DrEntropy]

Port holes are into the exhaust runners after the CC's, they don't have an effect on compression.