Dawgz83948 Posted July 31, 2011 Report Share Posted July 31, 2011 Ok, so what is interchangeable between L1600 and L20b? Sorry for the stupid question. Quote Link to comment
Skib Posted July 31, 2011 Report Share Posted July 31, 2011 basicly everything attached to the head and the head itself, water pump, oil pump. L20B head and cam are usually a nice bump to a stock L16 and the L16 no smog intake and exhaust are a nice swap over to the L20B to get rid of its shitty joined smog intake and exhaust manis Quote Link to comment
jon521 Posted July 31, 2011 Report Share Posted July 31, 2011 so a l20b cam would be a "performance" swap into a l16? Quote Link to comment
datzenmike Posted July 31, 2011 Report Share Posted July 31, 2011 The '78-'80 L20B intakes are larger port. The '75-'77 L20B U-67 head has larger valves and ports and the square exhaust matches the L16 manifold. They are larger combustion chamber so you would want to run flat top pistons on an L16 to preserve the compression. Early L20B came with A 87 heads and there are some peanut closed chambers around Later '79 and '80 distributors are electronic and do not have points to replace. Peripheral stuff like starters will swap. There are gear reduction starters that are good in cold locations and high compression motors. Alternators from '78 on are internally regulated and don't need the 'buzz box' on the fender. It's not a stupid question but a bit vague. What motor are you swapping parts into? What motor are you looking to work with? What are your plans and goals? For example, the L16/L20B will cost about the same to rebuild but the L20B starts out about 20 hp more. It would cost a lot to get the same power from an L16 and it would never equal the low speed torque of the L20B. Depends on what your plans are. 1 Quote Link to comment
Dawgz83948 Posted July 31, 2011 Author Report Share Posted July 31, 2011 Sorry about the vagueness. I have a 1600 and also have a l20b that is basically a complete long block (with nothing else) and I want to swap the l16 parts onto the l20b engine (intake, exhaust, etc). My plan is to make a nice reliable truck. Also another stupid question, the open and closed chamber heads look identical, except the fact that there is extra material on the head. Can the head be decked to remove that material? The '78-'80 L20B intakes are larger port. The '75-'77 L20B U-67 head has larger valves and ports and the square exhaust matches the L16 manifold. They are larger combustion chamber so you would want to run flat top pistons on an L16 to preserve the compression. Early L20B came with A 87 heads and there are some peanut closed chambers around Later '79 and '80 distributors are electronic and do not have points to replace. Peripheral stuff like starters will swap. There are gear reduction starters that are good in cold locations and high compression motors. Alternators from '78 on are internally regulated and don't need the 'buzz box' on the fender. It's not a stupid question but a bit vague. What motor are you swapping parts into? What motor are you looking to work with? What are your plans and goals? For example, the L16/L20B will cost about the same to rebuild but the L20B starts out about 20 hp more. It would cost a lot to get the same power from an L16 and it would never equal the low speed torque of the L20B. Depends on what your plans are. Quote Link to comment
Skib Posted July 31, 2011 Report Share Posted July 31, 2011 Sorry about the vagueness. I have a 1600 and also have a l20b that is basically a complete long block (with nothing else) and I want to swap the l16 parts onto the l20b engine (intake, exhaust, etc). My plan is to make a nice reliable truck. take that L20B long block and put on the L16 intake and exhaust mani's good to go. Quote Link to comment
ggzilla Posted July 31, 2011 Report Share Posted July 31, 2011 There were several Datsun 1600 engines -- all different from each other. If you mean the L16 engine (stamped on the engine) it is similar to L18 and L20B. R16 (non-OHC) has little/no interchangeable parts. so a l20b cam would be a "performance" swap into a l16? Yes. All USA L20B engines were fitted with the same cam they put into JDM twin-carb engine L16 and L18 engines (SSS engines). Quote Link to comment
Skib Posted July 31, 2011 Report Share Posted July 31, 2011 There were several Datsun 1600 engines -- all different from each other. If you mean the L16 engine (stamped on the engine) it is similar to L18 and L20B. L1600 Quote Link to comment
datzenmike Posted July 31, 2011 Report Share Posted July 31, 2011 Also another stupid question, the open and closed chamber heads look identical, except the fact that there is extra material on the head. Can the head be decked to remove that material? No. Milling the head will affect the timing chain length and lead to endless problems trying to fix this.... better to just not. The L20B doesn't need a closed chamber head. It's about 20 hp more than the L16 and runs well in stock form. As skib said you can swap the L16 exhaust onto it. You will need the 2 int 1 down pipe. Quote Link to comment
Dawgz83948 Posted July 31, 2011 Author Report Share Posted July 31, 2011 No. Milling the head will affect the timing chain length and lead to endless problems trying to fix this.... better to just not. The L20B doesn't need a closed chamber head. It's about 20 hp more than the L16 and runs well in stock form. As skib said you can swap the L16 exhaust onto it. You will need the 2 int 1 down pipe. Thanks for the answers guys. Any good dismantlers in California for 620 parts? Quote Link to comment
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