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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N55 Turbo Engine Tuning and Exhaust Modifications - 335i Tuning > Jb4 ISO update upgrade or not?



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      02-20-2013, 02:00 PM   #1
mashimarho
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Jb4 ISO update upgrade or not?

I've been reading a lot of horror stories and now do not want to do it.

We still do not know what the problems were do we?!

Any inputs?
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Last edited by mashimarho; 02-20-2013 at 04:01 PM.
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      02-20-2013, 02:38 PM   #2
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I haven't heard of this update did you mean iso update?
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      02-20-2013, 04:01 PM   #3
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Quote:
Originally Posted by fasteddie222 View Post
I haven't heard of this update did you mean iso update?
Yes, sorry. The iPhone autocorrect is garbage at times.
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      02-20-2013, 04:16 PM   #4
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Horror Stories? Havent heard anything regarding that? I have been on the ISO update and honestly it was the best move. Car is much more smoother and responsive. No more Cold Start Surges and boost delivery is just so darn smooth.

I would suggest doing it.
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      02-20-2013, 04:26 PM   #5
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Quote:
Originally Posted by Sejo5 View Post
Horror Stories? Havent heard anything regarding that? I have been on the ISO update and honestly it was the best move. Car is much more smoother and responsive. No more Cold Start Surges and boost delivery is just so darn smooth.

I would suggest doing it.
Really..? I've heard plenty and only 1 or 2 successful ones that don't have any cons. A lot of them are also regarding e85 + ISO
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      02-20-2013, 04:49 PM   #6
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Quote:
Originally Posted by mashimarho View Post
Really..? I've heard plenty and only 1 or 2 successful ones that don't have any cons. A lot of them are also regarding e85 + ISO
Ya, I made the move over a couple of months ago and have not had a single problem. I actually posted in another thread about how happy i was. The car pulls so hard on 50% E85.

I wish i could run E85 all the time but its about a 30min drive for me.
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      02-20-2013, 05:12 PM   #7
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Quote:
Originally Posted by mashimarho View Post
Really..? I've heard plenty and only 1 or 2 successful ones that don't have any cons. A lot of them are also regarding e85 + ISO
If you can please point me to these threads? I would like to read up on that.

Quote:
Originally Posted by Shogun1122 View Post
Ya, I made the move over a couple of months ago and have not had a single problem. I actually posted in another thread about how happy i was. The car pulls so hard on 50% E85.

I wish i could run E85 all the time but its about a 30min drive for me.
Same here did a 70/30 mix last week and it felt good. But i did realize my MPG went down maybe cause i have a lead foot
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      02-20-2013, 05:15 PM   #8
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do the iso update! its like installing the jb4 for the first time, so much torque
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      02-20-2013, 05:23 PM   #9
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Well, this is a turn of event.
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      02-20-2013, 05:32 PM   #10
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I honestly had a few complaints but terry was able to help me out. Now everything is working good. I'm happy with ISO.
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      02-20-2013, 06:23 PM   #11
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as long as you follow the directions properly I doubt you'll have a problem. the car runs so much smoother and the power delivery is so much better, I would definitely recommend it. I wrote a review shortly after updating to ISO a while ago and that's before I went with e85 mixtures. Even without it, the torque feels so much stronger on ISO than it did with integrated boost control, and far smoother on the delivery. Like a new car again
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      02-21-2013, 07:36 AM   #12
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I had some issues but it was operator error. Car runs great now, just do it and you will be happy. I would alternate the e85 to two fill ups and then one straight 93 or 91 octane.
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      02-25-2013, 11:47 AM   #13
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So the iso update gives smooth power delivery?
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