Hello, I have an 83 volvo 244 with a b23f. I saw an old post of yours: I see there is a 1983.5? Is that only on the manual trans. I have the AW70. So my question is, would mine still have the 13MM rods and forged crank. If so I will only change the pistons and then turbo it. Please let me know so I do not have to tear to far into. Thank you very much.
1983.5-84 B23F with M46 trans - 9.5:1
1983-84 B23F with AW70 trans - 10.3:1
1985+ B230F all trans - 9.8:1
My car has a B23F+T and you can see the results. Lowering compression isn't necessary with proper fuel and spark management. I'll note that, at my power levels, neither of those precautions have been necessary, and my engine has been detonated thousands of times, still running smoothly.
The rods in an 83.5 B23F are 13mm, or very thick. The crank is forged. The pistons are cast. The only thing you have to worry about destroying with 300hp is the pistons, since they're cast. Change those, and your bottom end is worth 400hp.
1983.5-84 B23F with M46 trans - 9.5:1
1983-84 B23F with AW70 trans - 10.3:1
1985+ B230F all trans - 9.8:1
My car has a B23F+T and you can see the results. Lowering compression isn't necessary with proper fuel and spark management. I'll note that, at my power levels, neither of those precautions have been necessary, and my engine has been detonated thousands of times, still running smoothly.
The rods in an 83.5 B23F are 13mm, or very thick. The crank is forged. The pistons are cast. The only thing you have to worry about destroying with 300hp is the pistons, since they're cast. Change those, and your bottom end is worth 400hp.