A2A Supercharged Intake Options

Senna-F1 · 01-27-2020, 05:59 PM

Quote:

Originally Posted by Senna-F1

So Eugene says boost should continue to climb even past 15 psi at 6600. Might be something going on. It slowly drops after that instead. So, anyone ever seen a stock pulley setup continue on past 15? It looks like it could just be this SC running out of steam and not being able to supply a continuous 15 psi as revs increase past 6600 on the stock pulley. But Eugene doesn’t think so. Thoughts?

BTW, Does the rate of pressure loss, as seen in the video below, seem reasonable? I had read this rate of loss is OK. I addressed any obvious leaks, except for a bit coming from the MAF sensors.

https://youtu.be/-7ZPmLl_7xI

SOHO tightened my belt, even though at first they thought it was fine. Up until they tightened it, boost was still dropping up top, just a tad. So to those who are losing even a small amount of boost, might just need a tighter belt. Posting log data showing boost till redline. Boost gauge read 15.2 psi which is even a bit lower than the ECUTEK log data of 30.2 psi absolute pressure.

Rusty · 01-27-2020, 11:10 PM

Quote:

Originally Posted by Senna-F1

SOHO tightened my belt, even though at first they thought it was fine. Up until they tightened it, boost was still dropping up top, just a tad. So to those who are losing even a small amount of boost, might just need a tighter belt. Posting log data showing boost till redline. Boost gauge read 15.2 psi which is even a bit lower than the ECUTEK log data of 30.2 psi absolute pressure.

Gauge pressure is different then absolute pressure. They will never read the same.

The simplest way to explain the difference between the two is that absolute pressure uses absolute zero as its zero point, while gauge pressure uses atmospheric pressure as its zero point. Due to varying atmospheric pressure, gauge pressure measurement is not precise, while absolute pressure is always definite

turtle64b · 01-28-2020, 08:16 AM

Quote:

Originally Posted by Rusty

Gauge pressure is different then absolute pressure. They will never read the same.

The simplest way to explain the difference between the two is that absolute pressure uses absolute zero as its zero point, while gauge pressure uses atmospheric pressure as its zero point. Due to varying atmospheric pressure, gauge pressure measurement is not precise, while absolute pressure is always definite

Agree here. Your gauge/meter is probably off by maybe .2/.3 psi, depending on height above sea level. At sea level, atmospheric pressure is 14.7 psi.

Senna-F1 · 01-28-2020, 08:33 AM

I was just reporting the readings, and making a point that I wasn’t even selecting the highest one, since there was a lot of disbelief over my numbers. Having said that, Eugene says boost recorded by dynos are typically lower because they use a longer vacuum tube to reach their sensor. Vacuum loss over longer runs. I still hit high 14’s on the dyno I believe. I don’t understand why an unknown dyno with unknown sensors and vacuum tube length is somehow more believable or comparable than the equipment virtually everyone here owns. Probably a 4 bar OMNI-Power sensor, a couple feet of tube, and ECUTEK software. These are all constants, so why not rely on them instead of insisting on boost numbers from a dyno?

TopgunZ · 01-28-2020, 10:58 AM

Quote:

Originally Posted by Senna-F1

I was just reporting the readings, and making a point that I wasn’t even selecting the highest one, since there was a lot of disbelief over my numbers. Having said that, Eugene says boost recorded by dynos are typically lower because they use a longer vacuum tube to reach their sensor. Vacuum loss over longer runs. I still hit high 14’s on the dyno I believe. I don’t understand why an unknown dyno with unknown sensors and vacuum tube length is somehow more believable or comparable than the equipment virtually everyone here owns. Probably a 4 bar OMNI-Power sensor, a couple feet of tube, and ECUTEK software. These are all constants, so why not rely on them instead of insisting on boost numbers from a dyno?

I know reading boost numbers is nice. But where it all matters is how much its laying down on the dyno. Do you have those results?

turtle64b · 01-28-2020, 11:00 AM

Quote:

Originally Posted by Senna-F1

I was just reporting the readings, and making a point that I wasn’t even selecting the highest one, since there was a lot of disbelief over my numbers. Having said that, Eugene says boost recorded by dynos are typically lower because they use a longer vacuum tube to reach their sensor. Vacuum loss over longer runs. I still hit high 14’s on the dyno I believe. I don’t understand why an unknown dyno with unknown sensors and vacuum tube length is somehow more believable or comparable than the equipment virtually everyone here owns. Probably a 4 bar OMNI-Power sensor, a couple feet of tube, and ECUTEK software. These are all constants, so why not rely on them instead of insisting on boost numbers from a dyno?

I would take my own pressure meter and ECU readings over a dyno vacuum tube any day!

Senna-F1 · 01-28-2020, 11:18 AM

Quote:

Originally Posted by TopgunZ

I know reading boost numbers is nice. But where it all matters is how much its laying down on the dyno. Do you have those results?

½ of them. Right now I just have the E53 dyno. When I asked why just 53% Ethanol, they said to keep it safe for a long life. I don’t know... but I’m very happy with what I got.

With my intake and filter, 9 psi pulley, and On E53, I made 618 WHP and 452 WTQ @ 14.7 psi. I’m guessing that’s a boost record for a filtered 9 psi pulley setup. I don’t even see turbo guards making that kind of boost.

turtle64b · 01-28-2020, 11:20 AM

Quote:

Originally Posted by Senna-F1

½ of them. Right now I just have the E53 dyno. When I asked why just 53% Ethenol, they said to keep it safe for a long life. I don’t know... but I’m very happy with what I got.

With my intake and filter, 9 psi pulley, and On E53, I made 618 WHP and 452 WTQ @ 14.7 psi. I’m guessing that’s a boost record for a filtered 9 psi pulley setup. I don’t even see turbo guards making that kind of boost.

I hope to be in that area of power and pressure once I'm done with tuning. Likely mid-March after gallery gaskets get done, will I be able to hit the dyno.

Looks great!

cgr406 · 01-28-2020, 11:32 AM

Quote:

Originally Posted by Senna-F1

½ of them. Right now I just have the E53 dyno. When I asked why just 53% Ethenol, they said to keep it safe for a long life. I don’t know... but I’m very happy with what I got.

With my intake and filter, 9 psi pulley, and On E53, I made 618 WHP and 452 WTQ @ 14.7 psi. I’m guessing that’s a boost record for a filtered 9 psi pulley setup. I don’t even see turbo guards making that kind of boost.

Yes, that's awesome! Any thought as to what the pump gas numbers would be? Is it 93 octane in your area?

Senna-F1 · 01-28-2020, 11:34 AM

Quote:

Originally Posted by cgr406

Yes, that's awesome! Any thought as to what the pump gas numbers would be? Is it 93 octane in your area?

Thank you sir!

It is 93, and it should be in the 550+ WHP. Not sure on TQ. I’ll post it once I receive the plot.

Senna-F1 · 01-28-2020, 12:11 PM

Here it is on the dyno. https://www.youtube.com/watch?v=2xszPWzswNU

Back on topic... I've ordered a new printer that will allow me to print in more heat resistant and much stronger materials. Specifically Nylon, and the one I'm most excited about, Polycarbonate.

TopgunZ · 01-28-2020, 01:38 PM

Quote:

Originally Posted by Senna-F1

Here it is on the dyno. https://www.youtube.com/watch?v=2xszPWzswNU

Back on topic... I've ordered a new printer that will allow me to print in more heat resistant and much stronger materials. Specifically Nylon, and the one I'm most excited about, Polycarbonate.

Nylon is nice. Thats what I am using. It flexes some if you need it. I added in the glass fill so it can withstand even higher temps. PCarb is going to be super rigid and brittle but strong as hell. Its all application specific I guess.

DrBacon · 01-28-2020, 01:47 PM

Quote:

Originally Posted by Senna-F1

SOHO tightened my belt, even though at first they thought it was fine. Up until they tightened it, boost was still dropping up top, just a tad. So to those who are losing even a small amount of boost, might just need a tighter belt. Posting log data showing boost till redline. Boost gauge read 15.2 psi which is even a bit lower than the ECUTEK log data of 30.2 psi absolute pressure.

Is that timing on pump gas or ethanol? That's some insane timing advance

redondoaveb · 01-28-2020, 02:41 PM

Quote:

Originally Posted by DrBacon

Is that timing on pump gas or ethanol? That's some insane timing advance

It must be on pump. I know at least with mine (I have 91 octane) it had to be timed for pump or it would get bad knock if timing was set for e85. That's why I did the wastegate set up.

Senna-F1 · 01-28-2020, 02:45 PM

Quote:

Originally Posted by TopgunZ

Nylon is nice. Thats what I am using. It flexes some if you need it. I added in the glass fill so it can withstand even higher temps. PCarb is going to be super rigid and brittle but strong as hell. Its all application specific I guess.

For your cannon intake? I know you said you don’t think there are any 3D materials that will stand up to the heat and cold over a long time.

01-28-2020, 08:33 AM	#64 (permalink)
Senna-F1 Enthusiast Member Join Date: Jun 2016 Location: Cary, NC Age: 54 Posts: 425 Drives: 370SC,EliseSC,MR2T Rep Power: 50	I was just reporting the readings, and making a point that I wasn’t even selecting the highest one, since there was a lot of disbelief over my numbers. Having said that, Eugene says boost recorded by dynos are typically lower because they use a longer vacuum tube to reach their sensor. Vacuum loss over longer runs. I still hit high 14’s on the dyno I believe. I don’t understand why an unknown dyno with unknown sensors and vacuum tube length is somehow more believable or comparable than the equipment virtually everyone here owns. Probably a 4 bar OMNI-Power sensor, a couple feet of tube, and ECUTEK software. These are all constants, so why not rely on them instead of insisting on boost numbers from a dyno? Last edited by Senna-F1; 01-28-2020 at 08:37 AM.

01-28-2020, 12:11 PM	#71 (permalink)
Senna-F1 Enthusiast Member Join Date: Jun 2016 Location: Cary, NC Age: 54 Posts: 425 Drives: 370SC,EliseSC,MR2T Rep Power: 50	Here it is on the dyno. https://www.youtube.com/watch?v=2xszPWzswNU Back on topic... I've ordered a new printer that will allow me to print in more heat resistant and much stronger materials. Specifically Nylon, and the one I'm most excited about, Polycarbonate. cgr406 and turtle64b like this.

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