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2Addicts | BMW 2-Series forum Technical Topics B58 (M240i) Engine, Transmission, Exhaust, Tuning Dorch B58 Stage 1 HPFP Upgrade

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      10-17-2020, 03:42 PM   #1
lixiang7349
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https://dorchengineering.com/product...-hpfp-upgrade/
Has anyone installed this on their 240? If so how much HP did you gain? I have bm3 tune.

I wonder why ppl tend to follow stage 1 with downpipe upgrade when HPFP seems like an easier route without all the problem with CEL and emission fails.
Assuming I don't care about the louder exhaust aspect.
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      10-17-2020, 08:47 PM   #2
cooolone2
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Apples and Oranges!

But that said, it's all relevant!

HPFP doesn't create any power in itself. And honestly, neither does a DP without tuning for the difference in airflow. Same goes for the HPFP, really only comes into play when exceeding boost spec and getting to a lean condition or static fueling, when more fuel is needed. So unless you're pushing to the limits, a HPFP isn't going to help do anything, and again you need to "tune" the extra fuel anyways.
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      10-17-2020, 09:01 PM   #3
lixiang7349
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Quote:
Originally Posted by cooolone2 View Post
Apples and Oranges!

But that said, it's all relevant!

HPFP doesn't create any power in itself. And honestly, neither does a DP without tuning for the difference in airflow. Same goes for the HPFP, really only comes into play when exceeding boost spec and getting to a lean condition or static fueling, when more fuel is needed. So unless you're pushing to the limits, a HPFP isn't going to help do anything, and again you need to "tune" the extra fuel anyways.
I have bm3 tune.
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      10-19-2020, 09:25 AM   #4
marcthedark
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The advantage/need for a hpfp on 93 is not clear. Some tuners say there is a gain while others are say there is no advantage (or they are still testing).
With 95+ or an E mix you can use the HPFP to avoid lean conditions and create a higher HP output.
BUT beside the above I would assume Stage 2 (aka DP) is always needed as the boost needs to be turned up to "make use" of the hpfp which might/should/is not healthy for a car with stock dp.
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