IPD plenum installed today
#46
11-07-2013, 06:47 PM
Ok guys so the dyno/plenum install is going down tomorrow at Cobb Tuning.
As some of you know, Cobb has a linked-AWD Mustang dyno. I've actually dyno'd there recently with my 2013 STi and it reads a bit low but no worries we will have a before (stock) and after (with the IPD plenum) on the same dyno, same day.
As I understand it (although I could be wrong), the plenum is supposed to produce the most gain in the mid-range with taper at the top end. So I'm guessing on a lower-reading dyno like Cobb's, it makes +30 AWHP at something like 4,000 rpm, tapering to single-digit gains at redline.
Anyway whatever happens I'll post up in less than 24 hours from now.
As some of you know, Cobb has a linked-AWD Mustang dyno. I've actually dyno'd there recently with my 2013 STi and it reads a bit low but no worries we will have a before (stock) and after (with the IPD plenum) on the same dyno, same day.
As I understand it (although I could be wrong), the plenum is supposed to produce the most gain in the mid-range with taper at the top end. So I'm guessing on a lower-reading dyno like Cobb's, it makes +30 AWHP at something like 4,000 rpm, tapering to single-digit gains at redline.
Anyway whatever happens I'll post up in less than 24 hours from now.
#52
11-08-2013, 05:59 AM
Hi Sam, sure the more the better! The dyno appointment begins at 9am. Cobb SoCal is in Fountain Valley (just off the 405 near Huntington Beach).
#54
11-08-2013, 08:05 AM
Of course we can even discount that the results are on a .2 tts, which is a very tuned platform. Results on a .1 tt would likely be easier to achieve. Heck, if I could get 30hp with a diy bolt on for $1k, I'd do it too. Let's see, exhaust with 200 cell cats, should add at least 20hp, so I'm at 500. Plenum and I'm at 530. How much more do I get with a tune?
This is interesting discussion on the turbo forum. Plenums were HOTLY debated on the 997 forum a long time ago and I don't recall ever seeing evidence of gains.
This is interesting discussion on the turbo forum. Plenums were HOTLY debated on the 997 forum a long time ago and I don't recall ever seeing evidence of gains.
Last edited by ryem3; 11-08-2013 at 08:09 AM.
#55
11-08-2013, 09:17 AM
Exhaust +20 plenum +30 doesn't work that way. A plenum on its own could add the 25. Exhaust on its own could add the 20 on otherwise completely stock cars. Combined, maybe 30-35. Theres always diminishing returns.
On my car, we did before and after with proto's plenum, and it gained ~8whp, then another 7 with the larger TB. That was on top of big vtgs, ic's, fenderwell intakes, etc etc. You just dont see the big gains once you've gone up in power. But there are legitimate gains. Price/performance is up to you and where you're taking the car.
On my car, we did before and after with proto's plenum, and it gained ~8whp, then another 7 with the larger TB. That was on top of big vtgs, ic's, fenderwell intakes, etc etc. You just dont see the big gains once you've gone up in power. But there are legitimate gains. Price/performance is up to you and where you're taking the car.
#57
11-08-2013, 09:24 AM
Exhaust +20 plenum +30 doesn't work that way. A plenum on its own could add the 25. Exhaust on its own could add the 20 on otherwise completely stock cars. Combined, maybe 30-35. Theres always diminishing returns.
On my car, we did before and after with proto's plenum, and it gained ~8whp, then another 7 with the larger TB. That was on top of big vtgs, ic's, fenderwell intakes, etc etc. You just dont see the big gains once you've gone up in power. But there are legitimate gains. Price/performance is up to you and where you're taking the car.
On my car, we did before and after with proto's plenum, and it gained ~8whp, then another 7 with the larger TB. That was on top of big vtgs, ic's, fenderwell intakes, etc etc. You just dont see the big gains once you've gone up in power. But there are legitimate gains. Price/performance is up to you and where you're taking the car.
This test on a stock car will be nice.
#58
11-08-2013, 09:46 AM
Exhaust +20 plenum +30 doesn't work that way. A plenum on its own could add the 25. Exhaust on its own could add the 20 on otherwise completely stock cars. Combined, maybe 30-35. Theres always diminishing returns.
On my car, we did before and after with proto's plenum, and it gained ~8whp, then another 7 with the larger TB. That was on top of big vtgs, ic's, fenderwell intakes, etc etc. You just dont see the big gains once you've gone up in power. But there are legitimate gains. Price/performance is up to you and where you're taking the car.
On my car, we did before and after with proto's plenum, and it gained ~8whp, then another 7 with the larger TB. That was on top of big vtgs, ic's, fenderwell intakes, etc etc. You just dont see the big gains once you've gone up in power. But there are legitimate gains. Price/performance is up to you and where you're taking the car.
#59
11-08-2013, 04:47 PM
Results
Exactly as advertised.
Greg will post up the more granular results of the dyno graphs but it made a peak gain of 30 AWHP and 34 AWTQ from what I remember.
I will also post up pics etc of the install on the dyno in a new thread/review but for now I will just leave you with the following info and dyno graphs:
First dyno below is "corrected" graph of the highest bone stock run vs highest run with the IPD plenum installed. It made the power in the mid-range as expected and tapered up top. It was hotter when we did the runs with the plenum installed and had to do a number of pulls first to get the ECU to adapt and because of the additional heat from those pulls, you can see it started pulling timing on the top end. Probably due to the fact that I had 91 octane in the car and airflow just can't replicate real-world conditions.
Second and third dyno's below are my stock dynos before the plenum was installed. Second dyno is "uncorrected" and the third is "corrected".
I was pretty much shocked as was everyone else with the stock dyno results. Check out the uncorrected peak of 501/536 AWHP/AWTQ. And the two other runs were stable as well. Again, this is on 91 octane on a Mustang AWD dyno.
After the dyno I drove back to my office (only about 5 miles but did a lot of pulls including my normal 40mph/2nd gear roll-on starts and WOW there is a huge seat-of-the-pants difference. You spend a lot of time in the mid-range on these cars this power delta makes a big difference.
I'm convinced this product is a terrific bang for the buck.
Thanks to Mike and Greg of IPD for taking the challenge. Their product is the real-deal and I'm one happy customer.
Greg will post up the more granular results of the dyno graphs but it made a peak gain of 30 AWHP and 34 AWTQ from what I remember.
I will also post up pics etc of the install on the dyno in a new thread/review but for now I will just leave you with the following info and dyno graphs:
First dyno below is "corrected" graph of the highest bone stock run vs highest run with the IPD plenum installed. It made the power in the mid-range as expected and tapered up top. It was hotter when we did the runs with the plenum installed and had to do a number of pulls first to get the ECU to adapt and because of the additional heat from those pulls, you can see it started pulling timing on the top end. Probably due to the fact that I had 91 octane in the car and airflow just can't replicate real-world conditions.
Second and third dyno's below are my stock dynos before the plenum was installed. Second dyno is "uncorrected" and the third is "corrected".
I was pretty much shocked as was everyone else with the stock dyno results. Check out the uncorrected peak of 501/536 AWHP/AWTQ. And the two other runs were stable as well. Again, this is on 91 octane on a Mustang AWD dyno.
After the dyno I drove back to my office (only about 5 miles but did a lot of pulls including my normal 40mph/2nd gear roll-on starts and WOW there is a huge seat-of-the-pants difference. You spend a lot of time in the mid-range on these cars this power delta makes a big difference.
I'm convinced this product is a terrific bang for the buck.
Thanks to Mike and Greg of IPD for taking the challenge. Their product is the real-deal and I'm one happy customer.
