There is a guy down here in south florida who builds boost to 10psi with his foot on the clutch.... anyone knows how he does this?

 

two-step rev. limiter or anti-lag...

 

Only problem is anti-lag will eventually fry your turbo, acts like a torch on your turbine.

 

Could you explain how the two step works?

 

I know the 2 step is popular with Supra guys, my friend has it on his. Basically, he's got it hooked up where he turns this switch and the RPMs go up to a pre-set number, and fluctuate really fast there to build boost.

 

I've been using the 2-step, or more accurately just using my rev limiter set to 7800rpm's. It'll build boost as it bounces off the limiter. I've run some 1.61 60's doing this but.... A buddy lost an engine a couple weeks ago, he does this too.

Nearly all of the corner seals were broken. Apex's were fine. I really question the effect's on our engines doing this. Last time at the track I'm pretty sure I heard mine ping while waiting for the guy next to me to stage and using the 2-step. (It was the final round in an import event).

How many of you are using the 2-step and what do you think of it's effect's on the rotary?

Scott

 

How do you have it wired?&nbsp Just the leadings and drop the trailings?&nbsp On all 3 channels?


-Ted

 

Not sure if you mean me or Rotaryfdtt? I'm just using the Haltech ignition-cut rev limiter. We found that the 2-step option worked better at such high rpm's that we were at the limiter anyway.
Stage, floor it to hit the limiter and just release the clutch on green. It builds boost and does lower the 60ft times a little. Also very easy and consistent. I ran 12.40's all day 2wks ago and took home some second place cash. I'm just really concerned about hurting my seals. I know it can't be good for a rotary's health to put it into a misfire condition. It sure sounded like it pinged on me once as well.

Any thought's?

 

I can vary my boost at the launch depending on the rpm. anywhere from 10psi to 24psi....

 

pluto, how do you do that??

 

i would think it would be pretty rare to ping while on the line, if a engine is gonna ping it's generally gonna be when its under maximum load. ie: 3rd or 4th gear at around 5-7000rpm not while sitting on the line pulling 10psi with no load

 

Well, I would think that too. It's pretty violent when it's bouncing on the limiter. Granted it could have been something making a sound similar to detonation with all the jerking around of the engine. I have much experience with what a rotary sounds like pinging on my old engine and it sure sounded like it was detonation to me.

Fact of the matter is, a buddy who's using the 2 step as well has 8 or 9 broken corner seals and perfect Apex seals upon teardown. Seemed kind of strange to both of us. That's why I started questioning the effect's of the 2-step on the rotary.

I'd love to know it's completely safe. It's soooo easy to launch off of it.

 

Differing rev limiters execute their rev cut differently - they are not all built and designed the same.



-Ted

 

ignition cut would be good, that way you might be able to combust the unburnt gas when its in the exhuast manifold in antilag type styles hahaha

 

.....ancinet chinese secret...

 

So what's your opinion of the E6K's ign-cut limiter when used as a 2-step on the rotary? If your not sure, or have no experience with it, I can understand. I mean, we can't expect you to know EVERYTHING about the rotary now can we Ted. j/k

 

The Chinese martial arts made it over here, so I believe it's safe to divulge this one.

Seriously, Pluto, I've been wanting to build boost at the line, but have only been successful by slipping the clutch while engaging the second staging light. Effective, but not good on the clutch.

I've also heard that apex seals don't really like real high rpms. I've heard they can start to deform and eventually lead to poor compression. With this said, I'd say bouncing off the rev limiter isn't good. Anyone have any feedback on this?

 

Bouncing of the redline limiter is definitely not good, i have a better idea but it depends how strong your trannys are, anyway here goes, have the car at around 3000rpm and on the 1 orange light floor it and just as the green light is about to come on engage and watch it launch, this is how pac man launches his customers manual cars.

 

To build boost on a rev limiter the idea is to retard ignition so much that fuel is burning very late and in exhaust to build up heat to spin up the turbo(S).

How much boost depends on many factors and has to be tested

 

man talk about raising the dead.....someone was doing quite a bit of searching.

 

And still waiting on some additional input/ideas.

 

still a good topic though Atleast better than"how much power"

 

rise.......

 

your apex springs will collapse before your apex seals do anything.........

 

How do you figure?