Hey everyone,
I'm not really sure how I would search this without pouring through hundreds of threads, so I'll just ask here.
I'm building a stroker setup off of the M52 crank, eta rod, and early B25 piston combo (2.8L). I have read that this should put compression around 9.5:1, and with shaving the block, around 10:1. The car will serve as a daily when complete until my E36 is ready to take the job back, then the E30 will again become dual purpose weekend warrior/mountain carver and track car.
I plan on staying NA for now. I would probably choose a different piston and cam setup for if I ever supercharge it like I one day would like to. I know I can run meth injection to compensate for knock on a higher compression motor, but as it will be a daily I'm nervous about having to supply the car with meth to get from point A to B. If you have reassurances on running meth injection on a car thats going to operate between 3-5 days a week, please let me know.
So what is really the ceiling on compression ratio in this situation, like running on 93 octane? the 10:1? Or could I get custom pistons and shoot for a bit higher like 10.5-11:1 and be safe? I ask this obviously not knowing a massive amount about the subject, so the more you can do to help me learn (even turning me onto the appropriate literature) would be great.
Some more details: I plan to run a 284 regrind (Bimmerheads), Ebay headers, megasquirt, and either a custom intake or ITBs if I have the budget (ITBs being the best option obviously). Planning for +1 mm oversized intake valves, and full lightening and balancing of the internals.
I'm not really sure how I would search this without pouring through hundreds of threads, so I'll just ask here.
I'm building a stroker setup off of the M52 crank, eta rod, and early B25 piston combo (2.8L). I have read that this should put compression around 9.5:1, and with shaving the block, around 10:1. The car will serve as a daily when complete until my E36 is ready to take the job back, then the E30 will again become dual purpose weekend warrior/mountain carver and track car.
I plan on staying NA for now. I would probably choose a different piston and cam setup for if I ever supercharge it like I one day would like to. I know I can run meth injection to compensate for knock on a higher compression motor, but as it will be a daily I'm nervous about having to supply the car with meth to get from point A to B. If you have reassurances on running meth injection on a car thats going to operate between 3-5 days a week, please let me know.
So what is really the ceiling on compression ratio in this situation, like running on 93 octane? the 10:1? Or could I get custom pistons and shoot for a bit higher like 10.5-11:1 and be safe? I ask this obviously not knowing a massive amount about the subject, so the more you can do to help me learn (even turning me onto the appropriate literature) would be great.
Some more details: I plan to run a 284 regrind (Bimmerheads), Ebay headers, megasquirt, and either a custom intake or ITBs if I have the budget (ITBs being the best option obviously). Planning for +1 mm oversized intake valves, and full lightening and balancing of the internals.
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