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View Full Version : whats the difference between the A20A1 and A20A3 blocks?


newaccorddriver
03-12-2006, 07:06 PM
http://autos.msn.com/research/compare/default.aspx?c=0&n=3&i=0&tb=0&ph1=t0&ph2=t0&dt=1&v=t1421&v=t1418
apparently those 2 accords have the same block, but the bore and the stroke are different. is this an error?

i have an 86 EXi and that auto page only goes back to 88. i gotta rebuild my engine soon enough, but would i have any problems if i happen to buy a carbed block and an EFI rebuild kit? im asking mainly cause that page lists the bore/stroke different on the same engine block.

i also see the compression ratio isa bit different. would i benefit a bit from using the carbed block with the lower compression ratio for turbocharging? i dont plan to run much boost, maybe 7-10PSI
Deadhead
03-12-2006, 07:45 PM
well, don't trust that data whatsoever.... it shows the LXi having 16 valves... and a honda with more torque than hp? that's a bit odd.
MessyHonda
03-12-2006, 08:01 PM
yeah MSN is wack...but i wish i was geting that MPG im only geting 25...but i wait to my car is warm...like 2-3 mins just runing at like 2500rpm and then it goes to like 1500 and then to 900...if its all freway i get like 320miles a tank when i was coming from LA and crusing at like 85-95mph
newaccorddriver
03-12-2006, 10:14 PM
well, don't trust that data whatsoever.... it shows the LXi having 16 valves... and a honda with more torque than hp? that's a bit odd.


dont accords had more torque then hp, but only by a few?



what about the second question i have about the compression ratios? would i benefit from using a carbed bottom end cause of the ever so slight compression ratio?
Vanilla Sky
03-12-2006, 10:38 PM
bore and stroke are the same. the pistons are what make the CR difference, with the carbed pistons and 86/7 LXi pistons having lower compression than the 88/9 LXi pistons. camshafts also played a roll in the extra gain between the years.
AccordEpicenter
03-13-2006, 08:44 AM
the blocks are exactly the same, but adding to what vanilla sky was saying, i think all FI pistons are the same regardless of year, what gives the power difference in 88-89 lxi vs 86-87 lxi is the intake manifold and exhaust manifold
newaccorddriver
03-13-2006, 04:49 PM
so would i benefit from using the carbed pistons?
AccordEpicenter
03-13-2006, 05:53 PM
stock FI 9.3:1 compression is boost friendly