[PRAY]

Well, not really results but some interesting information. There were still gains made but not near the real potential of the porting.

Car is a 16 C7Z A8 with just an upper pulley. The CAI and the Exhaust is completely stock. Dyno testing was done in 5th gear.

The base line pulls yielded 178-180 KPA and the proper AFR. After the porting the pulls only yielded 168-170 KPA and the car is now .4 leaner. So we lost 2 lbs of boost (restriction) and it leaned the car out quite a bit. Now we know the blower is moving some air despite the stock CAI and Exhaust. There were still gains in the middle of up to 15rwhp. There was no tuning done to correct the AFR so I don't know what else was there power wise with the AFR regulated. Timing also wad not adjusted for the loss of boost so a couple degrees back in it there would make some power as well.

Once this car gets opened up with a CAI and exhaust and has the 2 lbs of boost back there will be some serious gains. This was an interesting and informative test in my opinion. I know with centrifugal S/C's you can pretty much count on 20/22rw per lb of boost. I am not sure what a lb of boost is worth on a PD blower.

From my stand point I am not sure if this is a worth while mod for a basically stock car just yet. I think we opened up the middle without giving it enough air from the front or letting enough out the back. That coupled with the loss of restriction now costing us some boost makes this a toss up as a beginner mod. Now if you have CAI/Headers and are going to pulley down or O/D the crank I think you will see some great gains. End all would be H/C/Ported blower for max gains.

Some more tuning should be done soon to get everything regulated. I will post up a re-evaluated test later.

[kwav8r]

Originally Posted by PRAY

Well, not really results but some interesting information. There were still gains made but not near the real potential of the porting.

Car is a 16 C7Z A8 with just an upper pulley. The CAI and the Exhaust is completely stock. Dyno testing was done in 5th gear.

The base line pulls yielded 178-180 KPA and the proper AFR. After the porting the pulls only yielded 168-170 KPA and the car is now .4 leaner. So we lost 2 lbs of boost (restriction) and it leaned the car out quite a bit. Now we know the blower is moving some air despite the stock CAI and Exhaust. There were still gains in the middle of up to 15rwhp. There was no tuning done to correct the AFR so I don't know what else was there power wise with the AFR regulated. Timing also wad not adjusted for the loss of boost so a couple degrees back in it there would make some power as well.

Once this car gets opened up with a CAI and exhaust and has the 2 lbs of boost back there will be some serious gains. This was an interesting and informative test in my opinion. I know with centrifugal S/C's you can pretty much count on 20/22rw per lb of boost. I am not sure what a lb of boost is worth on a PD blower.

From my stand point I am not sure if this is a worth while mod for a basically stock car just yet. I think we opened up the middle without giving it enough air from the front or letting enough out the back. That coupled with the loss of restriction now costing us some boost makes this a toss up as a beginner mod. Now if you have CAI/Headers and are going to pulley down or O/D the crank I think you will see some great gains. End all would be H/C/Ported blower for max gains.

Some more tuning should be done soon to get everything regulated. I will post up a re-evaluated test later.

Attachment 916807

Would love to see what just an after market filter (i.e. green or K&N) would do before you upgrade the CAI and exhaust.

[PRAY]

Originally Posted by kwav8r

Would love to see what just an after market filter (i.e. green or K&N) would do before you upgrade the CAI and exhaust.

Not my build. I ported the blower and sent it off.

[Yellow6thGen]

I guess I should be bringing mine to you after fest Brett...

[PRAY]

Originally Posted by Yellow6thGen

I guess I should be bringing mine to you after fest Brett...

I was going to put out that I am looking for a product development car. I would like to be in control of testing products so I can maximize each peace to provide better data to the group.

[Sooner Cole]

Originally Posted by PRAY

Well, not really results but some interesting information. There were still gains made but not near the real potential of the porting.

Car is a 16 C7Z A8 with just an upper pulley. The CAI and the Exhaust is completely stock. Dyno testing was done in 5th gear.

The base line pulls yielded 178-180 KPA and the proper AFR. After the porting the pulls only yielded 168-170 KPA and the car is now .4 leaner. So we lost 2 lbs of boost (restriction) and it leaned the car out quite a bit. Now we know the blower is moving some air despite the stock CAI and Exhaust. There were still gains in the middle of up to 15rwhp. There was no tuning done to correct the AFR so I don't know what else was there power wise with the AFR regulated. Timing also wad not adjusted for the loss of boost so a couple degrees back in it there would make some power as well.

Once this car gets opened up with a CAI and exhaust and has the 2 lbs of boost back there will be some serious gains. This was an interesting and informative test in my opinion. I know with centrifugal S/C's you can pretty much count on 20/22rw per lb of boost. I am not sure what a lb of boost is worth on a PD blower.

From my stand point I am not sure if this is a worth while mod for a basically stock car just yet. I think we opened up the middle without giving it enough air from the front or letting enough out the back. That coupled with the loss of restriction now costing us some boost makes this a toss up as a beginner mod. Now if you have CAI/Headers and are going to pulley down or O/D the crank I think you will see some great gains. End all would be H/C/Ported blower for max gains.

Some more tuning should be done soon to get everything regulated. I will post up a re-evaluated test later.

Attachment 916807

I love these kind of real world test and I give you a lot of credit for being completely honest about results. I gives you a lot more credibility in my eyes. As you know, we sometime see builders/tuner making claims that just don't add up. This is a great example of a mod that has a lot of potential, but needs some other supporting mods to make a real difference. Keep up the good work!

[Franko07]

Originally Posted by 17ZL1Camaro

I love these kind of real world test and I give you a lot of credit for being completely honest about results. I gives you a lot more credibility in my eyes. As you know, we sometime see builders/tuner making claims that just don't add up. This is a great example of a mod that has a lot of potential, but needs some other supporting mods to make a real difference. Keep up the good work!

Hobby VS Career

your right it does make him have more credibility.

[PRAY]

Thanks guys. It would be hard to run a company called PRAY Performance and be dishonest. LOL. Plus everyone tests these days and you will eventually get caught in your lie. So there is no point in pumping up results.

I do think there would be a solid 20rw if everything was lined out.

But yes, I don't pay the bills with this "job" so it is easy to post legit repeatable results. I thought the information gleaned would be well received regardless of the results.

[waterman]

subscribed.

[PRAY]

Something else I thought about that I have found gains with in the past is cam timing. This test was simply an A/B with the same exact tune. With the drastic change in airflow tuning will be needed.

If you are local to me and would like a ported blower that is completely dialed in please contact me. I would like to offer you a deal.

[soceur77]

id be down if i was local, hell my car probably isnt going to be driven around here for the next few months...lol

[PRAY]

Originally Posted by soceur77

id be down if i was local, hell my car probably isnt going to be driven around here for the next few months...lol

I have a good transport guy.

[Sooner Cole]

Originally Posted by PRAY

Something else I thought about that I have found gains with in the past is cam timing. This test was simply an A/B with the same exact tune. With the drastic change in airflow tuning will be needed.

If you are local to me and would like a ported blower that is completely dialed in please contact me. I would like to offer you a deal.

I would be interested if I was closer. Also, mine already has several mods including headers, cam, CAI, pulley, ported TB, snout ect.