[dobbz]

i was wondering what octane i should be using in my b16a3

 

[TheGSRGuy]

Well more information would be helpful, such as any mods to the car, whether it's a USDM or JDM motor, the ECU, the tune, etc.

 

[nate2k5]

91 or higher would be recommendation

 

[MeltMan]

What's the compression? Stock?

 

[dobbz]

ok the only mod is the dc header, and its the p30 ecu not sure if it has been tuned, i was wondering if i should reset the ecu because of the previous owner using 87 octane, not sure if its the usdm or jdm engine how would i tell. so anyone else what you think i have been using 91.

 

[TheGSRGuy]

If the motor is stamped with B16A3, it's USDM. JDM motors don't have the final number (B16A instead).


B16A3

* VTEC
* Found in:
o 1994-1995 Honda Del Sol VTEC (EG)
+ Displacement: 1595 cm³
+ Compression: 10.4:1
+ Power: 160 hp (119 kW) @ 7800 rpm & 111 ft·lbf (152 N·m)@ 7000 rpm
+ Transmission: Y21
+ Redline: 8200 rpm



My guess is that it needs 91 or better.

 

[jdm_fantasy]

the previous owner using 87

Ouch...should be 91oct in that. Runs on 87oct but I believe the ecu retards the timing to compensate for it.

 

[dobbz]

so i should reset the ecu and change the plugs immediately, so then will the previous owner using 87 would trip the o2 sensor and the knock sensor. if i reset the ecu will the o2 and knock still trip.

 

[TheGSRGuy]

Probably don't need to reset the ECU, but it won't hurt. Run the tank down as far as you can, then put 91 or better in.