[OldCrow7xx]

Which would net higher peak power output?

Wondering if its worth the $550 for his refinements on my map or if the OTS E30 map would do it for $50...

[mike@x-ph.com]

100% worth it in my opinion.

I went from E30 OTS map to 100% E85 Jordan map on my M4 and the difference was night and day

[5w20]

Just what you were looking for.

[AmuroRay]

Originally Posted by 5w20

Just what you were looking for.

The video car was running E30 vs a custom tune.

[5w20]

Originally Posted by AmuroRay

The video car was running E30 vs a custom tune.

Yes sir. Camera car is full weight 435i (which already is heavier than a 335i similarly equipped) was on a stock air box and completely stock exhaust besides downpipe. 335i had rear seats removed, aftermarket CAI I believe Injen (which adds power no matter what anyone says), and resonator delete which may not may not add power but it does further remove weight. Custom tune or not, I don’t believe straight 93oct will make more power or be quicker than E30 OTS tune.

The custom tunes NEED meth and 93 or higher ethanol content to make a difference.

[AmuroRay]

Originally Posted by 5w20

Yes sir. Camera car is full weight 435i (which already is heavier than a 335i similarly equipped) was on a stock air box and completely stock exhaust besides downpipe. 335i had rear seats removed, aftermarket CAI I believe Injen (which adds power no matter what anyone says), and resonator delete which may not may not add power but it does further remove weight. Custom tune or not, I don’t believe straight 93oct will make more power or be quicker than E30 OTS tune.

The custom tunes NEED meth and 93 or higher ethanol content to make a difference.

The rear seat weighs almost nothing, same with the resonator. The intake (if it's an open box) could be argued that it's worth around 10whp. However, I have my doubts -
https://x3.xbimmers.com/forums/showthread.php?t=1425837

But you two should do a proper dyno or compare logs in virtual dyno.

[5w20]

Originally Posted by AmuroRay

The rear seat weighs almost nothing, same with the resonator. The intake (if it's an open box) could be argued that it's worth around 10whp. However, I have my doubts -
https://x3.xbimmers.com/forums/showthread.php?t=1425837

But you two should do a proper dyno or compare logs in virtual dyno.

Rear seats should be in the neighborhood of 50lbs, I agree the resonator isn't much maybe like 3-5lbs. I would venture to say driver weight difference is another 30-40lbs difference, so in all it's an easy 80lb+ difference. I have weighed my car on the scale provided at the local racetrack and the car (435i RWD) weighed 3590lbs w/o me and 3800lbs actual race weight with 1/4 tank of fuel and a completely empty car (no extra junk).

I'm not saying custom tunes don't make a difference, they just aren't worth the money on a straight 93oct tune. Now if someone is adding meth to a 93 or E30 tune (which cools the IATs and raising octane) or is going to a higher ethanol content than E30 provided they have the fueling (aftermarket HPFP), then the gains will definitely show.

AmuroRay, I once posted some logs and you're more than welcome to put that on a virtual dyno. I have no clue as how to do that lol. I'm with you on the intake, maybe adds 5-10whp at most. I'm just posting all the differences that actually do add power or reduce weight to make a difference in the grand scheme of things.

[jq_f22]

Originally Posted by 5w20

Yes sir. Camera car is full weight 435i (which already is heavier than a 335i similarly equipped) was on a stock air box and completely stock exhaust besides downpipe. 335i had rear seats removed, aftermarket CAI I believe Injen (which adds power no matter what anyone says), and resonator delete which may not may not add power but it does further remove weight. Custom tune or not, I don’t believe straight 93oct will make more power or be quicker than E30 OTS tune.

The custom tunes NEED meth and 93 or higher ethanol content to make a difference.

Just thought I would chime in since I've used all the bm3 ots maps and now have custom tunes for both 93 and e30(Jordantuned). Ots is great to start out and no custom 93 will not be faster than ots e30 the boost targets are higher and timing is more aggressive but 93 ots vs 93 is night and day. Same goes for ots e30 and custom e30 the car wakes up in the midrange, depending on who works your tune I am seeing 19-20 lbs while ots e30 peaks at 18.

Custom tuning makes the car feel that much more like factory(no strange hiccups) while giving you the extra kick.

[OldCrow7xx]

Originally Posted by 5w20

Rear seats should be in the neighborhood of 50lbs, I agree the resonator isn't much maybe like 3-5lbs. I would venture to say driver weight difference is another 30-40lbs difference, so in all it's an easy 80lb+ difference. I have weighed my car on the scale provided at the local racetrack and the car (435i RWD) weighed 3590lbs w/o me and 3800lbs actual race weight with 1/4 tank of fuel and a completely empty car (no extra junk).

I'm not saying custom tunes don't make a difference, they just aren't worth the money on a straight 93oct tune. Now if someone is adding meth to a 93 or E30 tune (which cools the IATs and raising octane) or is going to a higher ethanol content than E30 provided they have the fueling (aftermarket HPFP), then the gains will definitely show.

AmuroRay, I once posted some logs and you're more than welcome to put that on a virtual dyno. I have no clue as how to do that lol. I'm with you on the intake, maybe adds 5-10whp at most. I'm just posting all the differences that actually do add power or reduce weight to make a difference in the grand scheme of things.

I like this thinking- the value of the custom tune is multiplied by having higher quality fuels. Else wise there is not much else to be "massaged" out or "expertly engineered" of the 93 AKI fuel...

[OldCrow7xx]

Originally Posted by jq955

Just thought I would chime in since I've used all the bm3 ots maps and now have custom tunes for both 93 and e30(Jordantuned). Ots is great to start out and no custom 93 will not be faster than ots e30 the boost targets are higher and timing is more aggressive but 93 ots vs 93 is night and day. Same goes for ots e30 and custom e30 the car wakes up in the midrange, depending on who works your tune I am seeing 19-20 lbs while ots e30 peaks at 18.

Custom tuning makes the car feel that much more like factory(no strange hiccups) while giving you the extra kick.

I wish i could just pay someone locally one Saturday to show me how to plug in the laptop, pull data, identify choke points, and progressively improve input variables to achieve this. Just keep massaging those parameters in one way or the other until you find the perfect or optimal combination of values. I just hate the idea of paying for someone to do it for me, instead of teaching me how to do it for myself.

[AmuroRay]

Originally Posted by 5w20

Rear seats should be in the neighborhood of 50lbs, I agree the resonator isn't much maybe like 3-5lbs. I would venture to say driver weight difference is another 30-40lbs difference, so in all it's an easy 80lb+ difference. I have weighed my car on the scale provided at the local racetrack and the car (435i RWD) weighed 3590lbs w/o me and 3800lbs actual race weight with 1/4 tank of fuel and a completely empty car (no extra junk).

I'm not saying custom tunes don't make a difference, they just aren't worth the money on a straight 93oct tune. Now if someone is adding meth to a 93 or E30 tune (which cools the IATs and raising octane) or is going to a higher ethanol content than E30 provided they have the fueling (aftermarket HPFP), then the gains will definitely show.

AmuroRay, I once posted some logs and you're more than welcome to put that on a virtual dyno. I have no clue as how to do that lol. I'm with you on the intake, maybe adds 5-10whp at most. I'm just posting all the differences that actually do add power or reduce weight to make a difference in the grand scheme of things.

I’ll do VD for your logs - post them and the 93custom.

[5w20]

Originally Posted by AmuroRay

I’ll do VD for your logs - post them and the 93custom.

I don't have a custom tune and I did post some logs back sometime early in the year, no idea which thread though lol.