How do you build boost at the line? I'm running the MSD digital 6 with the 2-step set at 7000 rpms.

Will you build more boost the longer you sit at the staging lights at WOT?

Sorry if this is a stupid question. I was just wondering about this... TIA

 

Off the 2 step depending on your setup,I can build 8psi at 7k rpm

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 86si &raquo;</TD></TR><TR><TD CLASS="quote">Off the 2 step depending on your setup,I can build 8psi at 7k rpm </TD></TR></TABLE>

How long does it take you to build 8 psi? I've never looked at the boost gauge to see if it's building boost or not. I'm too busy concentrating on everything else...

 

You can also build more boost quicker by pulling timing out.

 

I would say about 3 or 4 sec.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jerseykid609 &raquo;</TD></TR><TR><TD CLASS="quote">u can hit the 2step once both prestage and stage bulbs are lit up for both sides just about the time the tree starts to go down. thats ideal at least if u and the other racer stage at the same time. </TD></TR></TABLE>

That's what I've been doing, but I was wondering if that's enough time to build a fair amount of boost.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TurboChrgd_Civic &raquo;</TD></TR><TR><TD CLASS="quote">

That's what I've been doing, but I was wondering if that's enough time to build a fair amount of boost. </TD></TR></TABLE>

it is enough time, its not like the longer you sit there the more boost you build, it will only build a certain amount and stop. i can normally get about 8-9psi at 7k

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jared &raquo;</TD></TR><TR><TD CLASS="quote">

it is enough time, its not like the longer you sit there the more boost you build, it will only build a certain amount and stop. i can normally get about 8-9psi at 7k</TD></TR></TABLE>

Thanks, that's what I needed to know. Thanks for all the responses.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jared &raquo;</TD></TR><TR><TD CLASS="quote">

it is enough time, its not like the longer you sit there the more boost you build, it will only build a certain amount and stop. i can normally get about 8-9psi at 7k</TD></TR></TABLE>

Actually, unless you pull a grip of ign timing on the step, the amount of time on the step usually makes a pretty noticable difference. The longer you're on it the more heat you build and the more boost it'll make.

 

As tony said the longer you sit there the more boost you will build. With some systems you can set this boost level and when it sees that level it will start to put timing back in so you can leave the line at a consistant boost level every time. In the AEM RWD we can build roughly can't tell you the real number of course. But lets just say we have no problem with building 20 pounds of boost in less than a second at the line.

 

ANTI-LAG ROCKS!

 

the ******* the manifold the more boost you build.. i used to get 8 out of the old drag 2

 

with motec, you don't really have to do anything fancy to get the car to build big boost on the line. i can get my car to make 1 bar on the two step, and it happens very quickly. the motec also reads the speed sensor, so the two step is automatically engaged and disengaged when the car is stationary or moving.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Rtype16 &raquo;</TD></TR><TR><TD CLASS="quote">You can also build more boost quicker by pulling timing out.</TD></TR></TABLE>

AEM EMS has the 2 step ignition retard feature setup..that makes it so simple

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Rtype16 &raquo;</TD></TR><TR><TD CLASS="quote">As tony said the longer you sit there the more boost you will build. With some systems you can set this boost level and when it sees that level it will start to put timing back in so you can leave the line at a consistant boost level every time. In the AEM RWD we can build roughly can't tell you the real number of course. But lets just say we have no problem with building 20 pounds of boost in less than a second at the line.</TD></TR></TABLE>

so it sounds like the longer your own it the more boost you can build...

 

bump for a good info.

 

If you are using Motec system you have the option to use a feature called "Over Run Boost" or "Boost Enhancement Anti-Lag" which allows you to dictate preset timing retards whether it be subtrating from the base map or taking timing away from ATDC. You also have to option to add fuel and set the stall RPM limits all within one function. This is the feature we recommend people to use in drag racing. Available in the Motec M4, M48, M400, M600, M800.

Typically you do not require much boost at all on a FWD application but if need be you can build any desired boost levels within a split second using this feature. Properly tuned Anti-lag systems are impervious to being burned down at the tree. You can have an anti-lag tuned so well that you can sit at the line all day and have very little affect engine or turbo system based on how long it takes the other person to move up to the light up the second bulb. Pro heads up racers know what I am talking about.

 

hey nate, do you recommend i use the antilag feature instead of the two step? or is the antilag feature to be used in conjunction with the two step?

am i doing any harm to my engine/turbo by just using the two step alone? it builds boost fine?

thanks!

 

as soon as you go WOT on the 2step the boost will build immediately. i was building like 5-6psi at 6k this weekend.

 

I recommend using the Anti-lag feature if you have a Motec.

1. You can add fuel to your anti-lag strategy if needed so that you can control your EGT levels.

2. You can dial your boost pressure so perfect that you don't have to worry about anyone burning you down and over boosting at the line.

3. You can change how hard the cut hits if you are not using an MSD ignition box

On small turbo chargers yes you can build boost purely on just the "two step". Try doing that on a real turbo charger. I dunno something like a Garrett GT45 we'll see if you can build boost on just a two-step LOL. I guarantee you are not going to get a single pound just on the two-step.

 

Informative thread

 

I am using AEM EMS.

has a 2-step feature with other settings to improve the launch. Also like the motec, it has anti-lag settings that you can adjust for to find your "sweet spot" for the launch

100% throttle

RPM's sit at 6800

build about 8-9psi

slip the clutch and hold on, without letting torque steer take you off the track (lsd only helps a little i found out by installing a quaife)

2-step on a boosted car

 

well since were on the topic of this...this is not a Honda but just a curiousity question

http://www.teamenjuku.com/tracklaunch.avi

(That is the video link)

We are using the MSD 2 Step with basically 0 timing on it....its building about 10-12psi at the line, but it seems to backfire more than anything i have ever seen on the 2step....

If im not mistaken, the MSD unit only pulls ignition timing out so alot of unburnt fuel is passing through the head causing it to be dumped into the exhaust thus causing the backfire but my question is, is it healthy for it to backfire that much???

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PRojectSi2 &raquo;</TD></TR><TR><TD CLASS="quote">well since were on the topic of this...this is not a Honda but just a curiousity question

http://www.teamenjuku.com/tracklaunch.avi

(That is the video link)

We are using the MSD 2 Step with basically 0 timing on it....its building about 10-12psi at the line, but it seems to backfire more than anything i have ever seen on the 2step....


If im not mistaken, the MSD unit only pulls ignition timing out so alot of unburnt fuel is passing through the head causing it to be dumped into the exhaust thus causing the backfire but my question is, is it healthy for it to backfire that much???</TD></TR></TABLE>

I noticed that my car was backfiring this last time out... Not all the time, but on a few passes it was.

Cool video!

 

Nathan is correct we also have the same settings in the EMS as the Motec does to use off the line. As I said before we can build pretty much any amount of boost off the line whether it be 5, 15, 25, 35 off the line in a fraction of a sceond. If anyone is at a race when we stage the car. Steph is off of the throttle the entire time pulling into the box. He is only on the two step after both staged lights are on his and the other car he is racing. Now this may seem like a small time to some people, but from when those lights are both staged to when it hits green is plenty of time for us to build boost.

When using antilag yes it will backfire or it is just igniting the fuel really late. So that the heat can build in the manifold and create more boost.