Quote:
Originally Posted by BSM135i
for $1500 dollars it should replace the pipes to the turbos as well as the last section near turbos as that is the real choking point in the intake system... You can make as much of a difference on the end of the intake tract as you want, but injen and BMS cones will have similar gains but a slightly higher temperature because thats not where the real bottleneck is at that point.
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Do you have factual data to support your claim about the stock intake tubes being the choke point? Do you know exactly what the overall surface area calculation is of the factory intake to see what the VE limit is? If you read our previous post you'll see where the information you are giving to other members is incorrect.
Also, what yourself and many other memebrs don't understand is the labor time to replace all those intake pipes that you feel are the choke point. It's easy to make a statement saying that you should replace the intake tubes from the turbos to the airbox, when many people have never seen what it actually takes to do so. No one in their right mind is going to pay the ridiculous amount of time it would take to R&R these intake tubes, especially when you will not see any power gains even with our upgraded turbos. We have proven this already with our upgraded turbo 135i.
Lastly, the air temp increase with the BMS and Injen intake is quite a bit more than you think it is. In case you're not familiar with BMW's adaptive ignition timing advance, it is directly relative to intake temperatures. Also, from a tuning perspective, each degree of intake timing advance produces more of a hp inrease than each lb of boost. Now if your intake air temperature is increased how do you think that will affect the ignition timing advance?