stock boost readings

staged_sho · July 14, 2014, 12:26:29 AM

Curious those of you who monitor/log, what you've seen as your boost levels under wot stock. I've flashed back to stock, and seen boost go up to ~12psi briefly (which is expected stock) immediately after flooring it, but it falls between 10-11 during the same wot run.

wasinger3000 · July 14, 2014, 12:52:21 AM

Sounds normal to me. You will see the highest boost right after a shift. The boost tapers off the closer you get to redline to protect the drive line. It's normal. Stock the most I would see was 12.2.

Tuned the highest I saw was 21.

FoMoCoSHO · July 14, 2014, 09:12:12 AM

I hope that 21 psi was for a very short amount of time....

wasinger3000 · July 14, 2014, 09:52:06 AM

Quote from: FoMoCoSHO on July 14, 2014, 09:12:12 AM
I hope that 21 psi was for a very short amount of time....

Yep. Just a spike. Sure was cool thought! Hah.

IHeartGroceries · July 14, 2014, 11:51:04 AM

Spiking to 21 psi is not healthy...

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ShoBoat · July 14, 2014, 12:08:50 PM

It would depend on which sensor is being read. 21 psi spike in the intake manifold would be bad. However if you are reading the sensor just before the TB that is typical. If you get off the throttle and the plate snaps shut there is a slight lag before the BOVs open up. And it's possible to see a spike of 20 psi.

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wasinger3000 · July 14, 2014, 12:41:39 PM

Nope this was manifold pressure from my boost gauge and not a sensor so I know it's correct. This was right after I put it in. I don't have a pic of the 21 but here is one of it right at 19.5-20.

wasinger3000 · July 14, 2014, 12:43:58 PM

Noting broke lol. Car still works as it should. Just shows the importance of a 3 bar. Reason it was spiked is because I was data logging with the 2 bar and the high pressure wasn't registered so nothing could be done. Since then the most I see is 18 ish on e35.

FoMoCoSHO · July 14, 2014, 03:25:49 PM

Quote from: wasinger3000 on July 14, 2014, 12:43:58 PM
Noting broke lol. Car still works as it should. Just shows the importance of a 3 bar. Reason it was spiked is because I was data logging with the 2 bar and the high pressure wasn't registered so nothing could be done. Since then the most I see is 18 ish on e35.

Up to 35 percent and still haven't ran out of fuel?

What is frp looking like at wot?

How is throttle response?

wasinger3000 · July 14, 2014, 03:27:27 PM

It still pulls like a fraught train! It's amazing. Fuel pressure is around 2000 it's still holding in there.

FoMoCoSHO · July 14, 2014, 03:35:25 PM

Quote from: wasinger3000 on July 14, 2014, 03:27:27 PM
It still pulls like a fraught train! It's amazing. Fuel pressure is around 2000 it's still holding in there.

Tip in and overall pedal response sharp?

wasinger3000 · July 14, 2014, 03:36:25 PM

Yep. The strongest point is right after a shift or down shift. Actually startled my fiancee haha.

SHOdded · July 14, 2014, 05:12:14 PM

Did Torrie tune for the ethanol at all, wasinger? e35 computation is based on as-labeled e85 or your as-tested e85?

wasinger3000 · July 14, 2014, 05:57:34 PM

It's tuned for 30% right now. I just tried 35 this weekend but don't want to bother him again over 5%. I think he's tired of my constant datalog's lol. I assume the car will adjust a little for the increase. Not much but a little I hope.

My ethanol stash has been tested 3 times with agitation 5 min appart. So I know it's correct. And this time I put it in before the fuel. So it's mixed in the tank.

By monitoring my timing an knock I know the car is adjusting correctly and it is making more power than 30% because I had a serious 2nd gear tire bashing.

FoMoCoSHO · July 14, 2014, 07:38:31 PM

What is your new commanded Afr?