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Old 09-24-2013, 10:49 AM   #1
FASTuuN
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Thumbs up Why are some people so comfortable on the Rev Limiter? FASTuuN

Watch this video as Professor Shawn Church drops the knowledge of Rev Limiters.

Learn Why and How to set up your rev limiter correctly and actually learn whats going
inside your engine.

It's FREE, just watch and learn.

http://facebook.com/fastuunEFIsimplified

It's the top post as for this moment.
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Old 09-30-2013, 02:10 PM   #2
FASTuuN
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Bump for those who haven't seen.
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Old 10-04-2013, 12:24 PM   #3
FASTuuN
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See this video and more at:

http://www.youtube.com/user/FASTuuN
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Old 10-04-2013, 04:24 PM   #4
Concillian
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You seem to advocate spark cut limiter in there. We've seen some pretty incredible carnage from spark cut limiters, especially on LC / FFS. Broken cam gears and such. Just a couple months ago on romraider someone noted a broken exhaust cam gear using spark cut LC on the carberry rom.

Any comment on this kind of stuff, is it the UTEC and carberry implementation of spark cut that does this? Because everything I've seen about spark cut up until this video has been that it's very rough on the valvetrain. Perhaps this is just incorrect hysterisis in general?
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Old 10-05-2013, 06:22 AM   #5
FASTuuN
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This answer is not directed directly toward your question but may give incite to Shawn's thought process.

"The usual consequences of a lean condition - detonation being the worst. One of the big problems with the 08+ WRX/STI, for example, is that if you run them into the rev limiter you'll get knock events. Subaru has cleaned this up on newer calibrations, but it was kind of scary and I believe contributed (in part - bad piston design being another part) to the rash of failures on those engines, many totally stock.

There are a number of thing that contribute to causing a lean condition (because, how could you be lean if there is no fuel for combustion, right?) on fuel cut. In no particular order they are: 1) Not all fuel injected for a particular cylinder necessarily goes to that cylinder - especially on short runner or ITB setups 2) The effects of wall wetting on the intake ports (less of an issue on a direct injection engine) and 3) The nature of the fuel cut and how the ECU manages the return to normal fueling.

As for problems with ignition cut, frankly, having seen well over 10k engines pass through our hands, I've never seen a top end failure that could be readily attributed to problems with an ignition cut. I suppose if we were tuning nitromethane or some other high volume/low stoichiometric ratio fuel you could get a hydrolock condition on ignition cut, but nitro, at least in anything more than small amounts, is not something we see on the dyno much. We use ignition retard/cut functions as soft rev limiters, for traction control systems and many other functions and just don't see them cause any problems. But, as always, YMMV.

SC"

As far as the title of the OP, It was definitely to raise your eyebrow and really question
"Why are some people so comfortable on the rev limiter?"

My opinion is that the rev limiter is a safety net. and Shawn explains that he will roll off the
Drive-by Wire and or reduce timing dramatically, all to indicate to the driver it's time to shift.

Banging on the limiter, stopping and starting an engine at 8000 RPMs is harsh on your engine no matter which method you implement.

Just like in aviation, if you ride the limit of safety, eventually your going to bend some metal.

HTH,

Joe
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Old 10-07-2013, 07:41 PM   #6
FASTuuN
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For those who are following the action, we have some huge news coming up in the next few days.

Sorry for being vague, but you gotta stay tuned just a little longer.

We're going to blow your mind...

...and change learning to tune EFI forever!

Joe Simmons
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Old 10-09-2013, 12:26 PM   #7
SlimJim8804
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Quote:
Originally Posted by FASTuuN View Post
For those who are following the action, we have some huge news coming up in the next few days. Sorry for being vague, but you gotta stay tuned just a little longer. We're going to blow your mind... ...and change learning to tune EFI forever! Joe Simmons
You have my attention. Subscribed.
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Old 10-09-2013, 01:14 PM   #8
OppositeLock
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Then: JRTune fastest td04

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Lazy sub'd as well.
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Old 10-10-2013, 10:07 AM   #9
FASTuuN
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Just another HYPE bump!...

...and reminder to go to http://facebook.com/fastuunEFIsimplified
like our page.

Our announcement will hit there first.
There will be a time limited offer and it's a shocker!
Don't be left out.

The announcement will live up to the hype, Guaranteed!

Joe Simmons
FASTuuN.com
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Old 10-16-2013, 02:49 PM   #10
FASTuuN
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Well, we're just about there...
...hang in there!
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Old 10-17-2013, 03:59 PM   #11
FASTuuN
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News SUBIETuuN is Here!

Well folks, the time has come for the next wave of learning to tune your own EFI systems.

Starting TOMORROW at 6:00pm PST you will, for the first time have the chance to purchase your very own SUBIETuuN course.

THE BUY BUTTONS WILL NOT BE ACTIVATED UNTIL TOMORROW THE18TH OF OCT. AT 6:00PM PST

This is a PRE-BUY Sale.

For 7-days only.

HALF OFF.

Yes, 50% off Vehicle Specific Courses

Do Not Miss Out On This Deal.

Go to http://SUBIETuuN.com
SUBIETuuN.com

Check out this one time offer and get in NOW while it's here.

Even if your not ready to tune just yet, REMEMBER it's LIFETIME access.
So, it's there when the time comes.

Go now to http://SUBIETuuN.com
SUBIETuuN.com

P.S. If your an initial FASTuuN Member at $500, DO NOT BUY SUBIETuuN
your getting it included in your initial purchase. ONLY the $500 Members.

Last edited by FASTuuN; 10-18-2013 at 09:09 PM.
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Old 10-18-2013, 03:23 PM   #12
FASTuuN
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Default SUBIETuuN Pre-sale. Tonight!

Today at 6:00pm pacific time the SUBIETuuN Pre-sale opens!

7-days from this time SUBIETuuN will be live.

http://SUBIETuuN.com

Be there tonight.

Cheers,

Joe
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Old 10-18-2013, 09:09 PM   #13
FASTuuN
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Well folks, the time has come for the next wave of learning to tune your own EFI systems.

The SUBIETuuN Debut!

Starting RIGHT NOW at 6:00pm PST you will, for the first time have the chance to purchase your very own SUBIETuuN course.

THE BUY BUTTONS ARE ACTIVE NOW! THE18TH OF OCT. AT 6:00PM PST

This is a PRE-BUY Sale.

For 7-days only.

HALF OFF.

Yes, 50% off Vehicle Specific
$100 OFF TUNERS SPECIAL

Do Not Miss Out On This Deal.

Go to http://SUBIETuuN.com
SUBIETuuN.com

Check out this one time offer and get in NOW while it's here.

Even if your not ready to tune just yet, REMEMBER it's LIFETIME access.
So, it's there when the time comes.

Go now to http://SUBIETuuN.com
SUBIETuuN.com

P.S. If your an initial FASTuuN Member at $500, DO NOT BUY SUBIETuuN
your getting it included in your initial purchase. ONLY the $500 Members.
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Old 10-18-2013, 09:15 PM   #14
Dillinja666
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There going to be an opensource special?
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Old 10-18-2013, 09:24 PM   #15
FASTuuN
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Quote:
Originally Posted by Dillinja666 View Post
There going to be an opensource special?
Not sure if you've seen this but we have an opensource video we did.

You can get this for 4.99 on our page http://facebook.com/fastuunEFIsimplified

As far as a full course like the "SUBIETuuN" course, that decision has yet to be made.
We we're very pleasantly suprised how much interest was expressed in the opensource video we did.

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Old 10-18-2013, 09:42 PM   #16
BB2006LGT
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Anything for 05-09 legacy gt? I a assume it is very similar to the 2.5L wrx....
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Old 10-18-2013, 09:54 PM   #17
FASTuuN
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Quote:
Originally Posted by BB2006LGT View Post
Anything for 05-09 legacy gt? I a assume it is very similar to the 2.5L wrx....
As a matter of fact, we do!

One of the vehicles we tune is an 05' Legacy GT
This can be accessed in our 04-06 Subaru WRX SUBIETuuN vehicle specific course.

Cheers,

Joe
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Old 10-23-2013, 07:25 PM   #18
Matt A
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thanks FASTuuN.

time to take this to the Vendor Classifieds now.
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