Quote:
Originally Posted by Avaley
Its also nearly a 10 year old data point and not a good comparison...since BMW went modular B series, B58 engine has won an award 5 out of last 6 years...B48 is the B58 with 2 less cylinders...
https://en.wikipedia.org/wiki/Ward%27s_10_Best_Engines
I'm trying to avoid a N20 vs B48 flame thread and focusing on B48 tuning specifically.
Drona, now that you have straight piped and did 12.4s before exhaust mods, I would dare to guess that the B48 stage 2, e50 with FBO is capable of a 12s 1/4 mile...you haven't done intake, charge pipe, spark plugs or methanol and what rims / tires?
In the 2021 G series this year, they up tuned the B48/B58 again and shaved another 0.2s off 0-60 and BMW is now claiming 255hp/400nm (5.3) in the B48 and 382hp/500nm (4.3) in the B58 from the factory so there is definitely so more potential to be had.
Any thoughts on changing your factory heat exchanger? Since going air-to-water and away from an intercooler, i dont think there are a ton of heat issues but CSF makes a upgraded radiator tested to keep temps cooler but the factory one has done great for me, esp with the max cool setting in BM3.
https://csfrace.com/bmw-b58-cooling/ |
I have KN filter in factory airbox and I honestly think it’s best combo for the intake. Charge pipe doesn’t add any power. I have best plugs available for b48 - ngk 94201. As for meth, no I don’t have it and I think meth could be worth a try actually. I have stock m 18’’ rims and normal non run flat tires but nothing special.
I think 12.4 is very close to max performance with stock turbo. Maybe 12.3 but that would be very hard to do without cheats))
Don’t think couple of degrees decrease in iat is worth the price of a tuned heat exchanger.