i did a search and the information i wanted to see wasnt showing up, so i wanna know if its bad. i know if you do it for a long period of time it is.

 

come on some has to know!!!

 

Don't worry about it. V8 motors have been doing it for years. Just dont stay on it forever. 2 0r 3 seconds are no problem. When you stage the car, hit the limiter.
Lots of racers have used it as a down track limiter. This is called "driving into the limiter". It makes the car more consistant, but slow's it down a little. Good for bracket racing, but bad for heads up racing. NHRA outlawed this practise and it is now know as cheating. You are not allowed to use a limiter down track, just at the starting line. But using a limiter on the starting line will not hurt your motor, as long as you do not use it excessivly.

 

i used it revving @7500 no pros but my motor was fully built to handle high rpm's so your might be different.

 

I hear if you hold it to long it pounds the sh*t out of your bearings

 

its basically fuel cut at chosen RPM. so just ignition fires w out fuel? correct me if im wrong.

 

ya i have mine set to 5,000.. but has anyone ever blown there motor?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SilCiv2K &raquo;</TD></TR><TR><TD CLASS="quote">its basically fuel cut at chosen RPM. so just ignition fires w out fuel? correct me if im wrong.</TD></TR></TABLE>
It is not a fuel cut it is an ignition cut that basically sends the unburned fuel cuz there is no spark to ignite the mixture ,so it escape to the exhaust ,because the exhaust is so hot the fuel ignite there and causes a loud explosion .This explosion can cause harm to the exhaust manifold such as cracking . Moderate usage is required .From personal usage on by turbochaged CRX I leave the line consistence which also help be to get the turbo start spooling to reduce lag.

 

some EMS do use fuel cut while others use ignition cut. Also the ignition is not entirely cut its just retarted really bad. If it was cut entirely the fuel would flood the motor and it would shut off.

 

does anyone know if chrome does fuel or ignition cut off

 

I have a MSD Digital 6 , and that does ignition cut, becuase when i come off of it. I get a major flame out the exhaust.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by komat &raquo;</TD></TR><TR><TD CLASS="quote">does anyone know if chrome does fuel or ignition cut off</TD></TR></TABLE>

It can do both. There's a script for anti lag which is ignition cut and the normal FTL is Fuel cut.

Phil

 

2 step is definitely not good on the bearings but since you should only be using this for racing then most guys keep a check on their bearings. You do not want a fuel cut as that will lean out that cylinder. Turbo guys use the 2 step along with pulling timing as to get the mixture to ignite in the manifold to get the turbo to spool faster.

 

negative 12 degree's for me big fireballs and bleeding ear drums. pulled motor apart and the bearings look as good as new

 

2 step does not hurt bearings unless , there is something else going on in the tune up, but a msd just drops cylinders via spark so it actualy does not put much load on the bearings, now what it can do to valve train is a little different depending on what rpm you are limmiting. we have used msd since we started racing and have had no ill affects..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by littlebluecrx &raquo;</TD></TR><TR><TD CLASS="quote">2 step does not hurt bearings unless , there is something else going on in the tune up, but a msd just drops cylinders via spark so it actualy does not put much load on the bearings, now what it can do to valve train is a little different depending on what rpm you are limmiting. we have used msd since we started racing and have had no ill affects..</TD></TR></TABLE> I have found no related issues either. The extra harmonics are never good though.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Turbo-charged &raquo;</TD></TR><TR><TD CLASS="quote">negative 12 degree's for me big fireballs and bleeding ear drums. pulled motor apart and the bearings look as good as new</TD></TR></TABLE>

How do you get -12 deg? You do it manually in the software?

Phil

 

yea through electromotive. the default is negative 12 on the 2 step.....there is some tricks and things you can do to fool it to running even less timing. since i was building 15psi of boost at 4800 rpm i decided that more boost wouldnt be a good thing so i didnt play with that part of it. i think the newest version of the software has a lot more adjustability for the 2 step but none of the last 3-4 cars i've installed electromotive on have needed the 2 step so i havnt played with that party of it yet.

 

what kind of boost are most of the t4/sfwd guys at the line on the 2 step is leaving at 15lbs to much ?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Turbo-charged &raquo;</TD></TR><TR><TD CLASS="quote">yea through electromotive. the default is negative 12 on the 2 step.....there is some tricks and things you can do to fool it to running even less timing. since i was building 15psi of boost at 4800 rpm i decided that more boost wouldnt be a good thing so i didnt play with that part of it. i think the newest version of the software has a lot more adjustability for the 2 step but none of the last 3-4 cars i've installed electromotive on have needed the 2 step so i havnt played with that party of it yet.</TD></TR></TABLE>

Thanks. I wonder if using the retard function along w/ the 2 step on an MSD Digital 6 would build more boost?

Phil

 

i was wonderin same. great thread

 

I was able to make 8lbs of boost at 5,000RPM with AEM's EMS with a true 1.8 liter B18c, 2.5" downpipe/exhaust and SC-6152E. IMO this is enough for most street cars. The setting's were as follows.

* Level 10
* 10,000 (De-Activate Fuel Cut)
* 5,000 (Ignition Cut)
* 5 (VSS)
* 4,000 (Retard)

 

im just wondering what kind of boost level i should try to shoot for when leaving the line. i have fast ems so there is anti lag ect. for the 2 step. i have the msd 7al-2 should i change it to a msd box where it can retard the timing. sorry to jack the post.

 

2-steps hurt the bearings on high hp motors. that's why most supercharged pro mod guys don't run em. they use a hydraulic throttle stop instead.

 

I normally pull about 10 degrees and build 10-12psi. You can also use the nitrous retard on the digi6 to pull up to 10 degrees also. Just have it activate the same time as your 2step. pow..pa..pow...pow.
I have a vid of me and Joe(turbo-charged) in Virginia at the line on the 2 steps, sounded like a police shootout.

http://www.speeddreamz.com/videos/vir10-69.wmv