Timing and displacement questions

[Ryan S.]

If the circle on the flywheel (7*BDTC )is to the right of the indicator as you look through the sight window, boes that mean the timing is advanced? That's where mine was set, and I am getting pre-ignition knock under load, so I moved it so the indicator in right on the circle, hoping to retard the timing a bit. Did I go the correct way?
Also, does anyone know the cubic inch displacement of the 2f?
Thanks.

 

[nikos8]

If the indicator is right on the circle then you are at 7* TDC. If the circle was to the right then it was advanced. If it is advanced to the point where the engine is knocking then it is advanced too far. It can be advanced just below 12* TDC (or so) for better gas milage.
As for the displacement, the 2f is a 4230cc engine which by my calculations (might be off) is 258.13 ci.

Hope this helps.

 

[Ryan S.]

Thanks. Helps alot, now I know that I am going in the right direction.

 

[srplus]

right on

since the japanese took a 255 ci 6 cylinder GM truck motor and reverse engineered it to come up with the base for the F engines then the calculation of 258.13 ci has gotta be close.

 

[FJ40Jim]

Actually, the GM engine was 235CID, 4" stroke and 3.5" bore.

The metrified Toyota copy keeps the 4" stroke, but bumps the bore to exactly 90mm, which is about 3.54". The toyota F engine displaces 237CID.

The 2F has the bore increased 4mm, to give 258CID.