MSD 2 step with auto trans (Updated Track Results)
I see... yeah maybe it's because you're a auto and I'm a stick. So your converter is helping load the turbo. I was surprised it dropped vacuum when I went from 3,200 rpms to 4,200. I'm going to play with it some more today.
Manual cars I tuned we always pulled timing in the load area where it was on 2 step and made it kinda rich. I know they are different cars/motors, but that was what worked for us on the import stuff. Timing would be way down even negative.
Ron you convinced me. Ordered my 2 step. How did you end up wiring yours?
Ron you convinced me. Ordered my 2 step. How did you end up wiring yours?
Manual cars I tuned we always pulled timing in the load area where it was on 2 step and made it kinda rich. I know they are different cars/motors, but that was what worked for us on the import stuff. Timing would be way down even negative.
Ron you convinced me. Ordered my 2 step. How did you end up wiring yours?
Ron you convinced me. Ordered my 2 step. How did you end up wiring yours?
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Thread Starter
Joined: Aug 2011
Posts: 4,730
Likes: 814
From: Portland, OR
Thread Starter
Joined: Aug 2011
Posts: 4,730
Likes: 814
From: Portland, OR
Clearly it works. My converter isn't half bad either.
From the release of the brake pedal to full boost is now 1 second.
More tweaking to do.
The track prep was the key though. Prior runs were simply frustrating!
just be carful not to say anything about running e85.. anything over 10% has to run spec 15 or something, same as running alcohol ... be about $2k for all the crap you will have to wear then..
Thread Starter
Joined: Aug 2011
Posts: 4,730
Likes: 814
From: Portland, OR
A lot of the bracket guys have switched to E85. I don't see them with the extra gear.
That would be a deal breaker for sure.
BTW, some pump fuel is now E15......
We'll using Ron as my inspiration I decided to mess around with my deal as well. Set the 2 step (or rev limiter #2 on the Holley) at 2650 and floored it.
SOB just made 4.3psi on the foot brake (with the rev limiter obviously)! This is a big deal!! And just with the base tune of about 12.5 afr and 26* of timing. I moved the afr around and timing a bit but didn't see alot if any change. Guess I can raise/lower the rev limit a bit more to see if it builds even more boost.
One thing I want to mention though. Even though the target afr was 12.5, the o2 sensor was showing between 17:1 down to 15:1 once boost started building so maybe that's where the target afr should be for some folks. Good thing closed-loop didn't kick in.
I could tell the engine wanted to punch me square in the face though...
SOB just made 4.3psi on the foot brake (with the rev limiter obviously)! This is a big deal!! And just with the base tune of about 12.5 afr and 26* of timing. I moved the afr around and timing a bit but didn't see alot if any change. Guess I can raise/lower the rev limit a bit more to see if it builds even more boost.
One thing I want to mention though. Even though the target afr was 12.5, the o2 sensor was showing between 17:1 down to 15:1 once boost started building so maybe that's where the target afr should be for some folks. Good thing closed-loop didn't kick in.
I could tell the engine wanted to punch me square in the face though...
Reason for the weird air fuel is the O2 sensor will not read unburnt fuel. So any fuel that does not combust and just gets dumped will not be reported.
Thread Starter
Joined: Aug 2011
Posts: 4,730
Likes: 814
From: Portland, OR
Awesome Vince!
It is a little hard to get it in your head to floor the car on the two step isn't it?
Being on the brake pedal switch, I can light the first bulb, floor it, then ease off the brake enough to light the second bulb. Release the brake full on the last yellow.
Then get ready to shift.
I let my TH400 do the 1-2 for met at 6300.
On the AF ratio on the two step. It shows lean because of the unburnt fuel in the exh.
Just make sure that area in your fueling map matches the areas where you do make boost down low. Now you are making boost in an area the engine hasn't been calibrated.
Cool man!
Ron
It is a little hard to get it in your head to floor the car on the two step isn't it?
Being on the brake pedal switch, I can light the first bulb, floor it, then ease off the brake enough to light the second bulb. Release the brake full on the last yellow.
Then get ready to shift.
I let my TH400 do the 1-2 for met at 6300.
On the AF ratio on the two step. It shows lean because of the unburnt fuel in the exh.
Just make sure that area in your fueling map matches the areas where you do make boost down low. Now you are making boost in an area the engine hasn't been calibrated.
Cool man!
Ron
We'll using Ron as my inspiration I decided to mess around with my deal as well. Set the 2 step (or rev limiter #2 on the Holley) at 2650 and floored it.
SOB just made 4.3psi on the foot brake (with the rev limiter obviously)! This is a big deal!! And just with the base tune of about 12.5 afr and 26* of timing. I moved the afr around and timing a bit but didn't see alot if any change. Guess I can raise/lower the rev limit a bit more to see if it builds even more boost.
One thing I want to mention though. Even though the target afr was 12.5, the o2 sensor was showing between 17:1 down to 15:1 once boost started building so maybe that's where the target afr should be for some folks. Good thing closed-loop didn't kick in.
I could tell the engine wanted to punch me square in the face though...
SOB just made 4.3psi on the foot brake (with the rev limiter obviously)! This is a big deal!! And just with the base tune of about 12.5 afr and 26* of timing. I moved the afr around and timing a bit but didn't see alot if any change. Guess I can raise/lower the rev limit a bit more to see if it builds even more boost.
One thing I want to mention though. Even though the target afr was 12.5, the o2 sensor was showing between 17:1 down to 15:1 once boost started building so maybe that's where the target afr should be for some folks. Good thing closed-loop didn't kick in.
I could tell the engine wanted to punch me square in the face though...
As Sarg already stated don't take the AFR readings into account on the two step. The Holley will not go into closed loop on the two step so no worries there. How did you try to change the AFR around? You would have to do it on the main map and I would do the cells around the one you're at while on the step.
Yup, when setting up subarus there would be one little area of the map on there with very low timing and very rich fuel on the launch control, haha. It was crazy spinning all 4 tires though!
Last edited by Sarg; Sep 11, 2014 at 05:44 PM.
As Sarg already stated don't take the AFR readings into account on the two step. The Holley will not go into closed loop on the two step so no worries there. How did you try to change the AFR around? You would have to do it on the main map and I would do the cells around the one you're at while on the step.
I'd like to see if the "soft" rev limiter option will work. This supposedly drops spark on individual cylinders or something to that effect...maybe it would be easier on the engine. And again maybe raise/lower the rev limit to see if more boost can be gained. No matter what I did it stopped building boost at 4psi as if there was a rev limiter for that.