Quote:
Originally Posted by 5sokol335icoupe
dinan will never release a tune thats lean. remember the 335i is direct injection and has alot more gee wizz factor than most cars people have tuned before and so on.
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I agree with you. I was speaking of what i know from the EVO tuning.The 335 and the Evo cant be compared as far as tuning goes,or for that matter anything else.But as far as the throttle response situation and leaner AFR,s go. Like T-bone said that cars are usually leaned out to improve fuel economy. They also give you better throttle response in my experience.The Evo,s came stock running pretty rich.I forgot the exact afr,s,but once tuned leaner they ran stronger,better mpg,and much better throttle rsponse.To give an example.When i bought my 03 evo i said i was just going to do a drop in filter and get it dyno-tuned by big Al.Thats what i did.Picked up 35whp,and it was leaned out to its safest lean condition,key word SAFE. It was like driving a different car.The throttle response and overall driveability was 10x better(LOL),of course not literally but you get my point.Mpg increased,and it pulled much harder,faster and smoother right to redline.I,m 50 and have had over 30 cars in my life,with most of them being performance cars in one way or another.From muscle cars,tuners,etc.etc. including 8 motorcycles. Just about everything i owned was modified except my work car and family car.Again my point is getting to leaning out a car for better throttle response and power as long as it was at a safe lean out.I didnt want to melt any pistons.If one of my muscle cars was running rich i would lean it out by playing with jet size until it was running at its safest lean point by checking afr,s,fuel pressure,vacuum,timing,plug color,etc.,etc.The car or bikes for that matter would always run smoother,quicker,better mpg,and most important to me THROTTLE RESPONSE AND DRIVEABILITY.T-Bone also said that some tunes exagerate the throttle input to improve the throttle response.I,m not dissagreeing with him,but i think once you go slightely leaner you get better throttle input.BTW 8 months after i got my 03 Evo that i was just going to dyno tune and drop in filter, well 5k dollars later,well you know. (LOL)