My first three pulls on my car with KN filter and exhaust were done on STD (242WHP) so I continued with the same correction factor on all subsequent testing. HP was pretty much spot on with this correction factor. The difference between SAE and STD on my new graph is -4WHP. Not much different because the correction factor varies depending on ambient temp and run conditions. Changing correction factors the gains are the same give or take 1hp. Since you must know, before runs were done at 61 degrees with 36 percent humidity. After runs were done with 55 degrees and 26 percent humidity. What should matter more to you should be the intake temperature inside the plenum as well as surface temperature of the plenum. Power difference @5750 rpm: Before 211.95 After 228.19 @ 7500rpm: Before 258.93 After 277.60. Tq difference @ 5750rpm Before 193.52 After 208.35 @ 7500rpm Before 181.26 After 194.32. This can all be seen on the graph I provided.
I was using a 74MM tb and not the 76MM.
I have said before in previous posts that the OEM throttle body isn't going to work on this manifold. Only the DBW one will fit with an adapter plate. The throttle cable just won't work with the OEM TB. I cannot provide the data on this manifold with an OEM TB unless someone installs this manifold with a DBW setup.
Thank you. Do you have AITs?
I'm getting a 7whp difference going from STD (276.12whp) to SAE (269.08whp) and I've always liked to look at SAE since it makes different runs a bit more comparable than STD.
Overlaying the images isn't as clear and took more time than just hitting 'export', but here's my analysis:
Stock Manifold: (Red line)
-Custom DMS direct intake piping with DF scoop
-Custom DMS Upper turbo manifolds & Route KS titanium exhaust
-AEM Infinity
-Stock 65mm TB
dsmcrx Manifold: (Blue line)
-Custom DMS direct intake piping with DF scoop
-Custom DMS Upper turbo manifolds & Route KS titanium exhaust
-AEM Infinity
-BLOX 74mm TB
Ported Stock Manifold: (Green line)
-Stock piping with DF scoop
-TopSpeed Headers & small muffler (look at MotoIQ article)
-Stock ECU
-Stock 65mm TB
Conditions:
Stock Manifold: 61*F with 36% humidity.
dsmcrx Manifold: 55*F and 26% humidity.
Ported Stock Manifold (MotoIQ Article): 85.56*F 13% Humidity
-The dsmcrx Manifold had slightly more preferable temperatures and humidity, but they are close. The Ported Stock Manifold pull had much less ideal temperature but had better humidity conditions.
Power @4,000rpm:
Ported Stock Manifold: 138.26whp, 181.28tq
Stock Manifold: ~148whp, ~193tq
dsmcrx Manifold: ~150whp, ~195tq
-The lack of the VVIS plates in the Ported Stock Manifold greatly hurt the low end torque of the engine below 5,250rpm. The larger TB and dsmcrx manifold equaled or bettered the power and torque up to 5,250rpm.
Power @5750 rpm:
Stock Manifold: 211.95whp, 193.52tq
Ported Stock: 224.64whp, 205.22tq
dmscrx Manifold: 228.19whp, 208.35tq
-The Ported Stock and dsmcrx manifolds really pull away from the stock intake manifold above 5,250rpmand overlay very similarly with the dsmcrx manifold slightly having more power between 5,600-6,300rpm but the stock ported manifold has a pronounced strength from 6,300-7,000rpm. They then overlay from 7,000-7,500rpm.
Power @ 7500rpm:
Stock Manifold: 258.93whp, 181.26tq
Ported Stock Manifold: 274.70whp, 192.19tq
dsmcrx Manifold: 277.60whp, 194.32tq
-Both the Stock Ported and dsmcrx manifolds have noticeably more power than stock at higher engine speeds. If you look at the general shape of the ported manifold vs. stock, they have the same dips and shape from 5,500-8,000rpm with the ported manifold having ~10-12hp more than stock during this range.
Power @7,900rpm:
Stock Manifold: 247.29whp, 163.64tq
Ported Stock Manifold: 268.90whp, 178.65tq
dsmcrx Manifold: 281.31whp, 186.14tq
-At high rpm is where the dsmcrx really shines. After 7,500rpm where the stock TB and intake (even the ported one) start to drop, the dsmcrx manifold takes off and keeps making more power until ~8,200pm I wonder if a larger TB would keep this power increase going all the way to 8,500rpm.
Overall, it's impressive that the 74mm TB and dsmcrx manifold match and better the stock VVIS system at low rpm. This is huge for a daily driver since the Ported Stock manifold would feel very sluggish for daily driving rpm where you're not revving the motor out all the time. For the most part the dsmcrx and ported stock manifolds are similar between 5,250-7,500rpm with each having a slightly stronger band, however the combination of low end power and very high RPM power, the dsmcrx manifold & 74mm TB would make for a great well-rounded and more powerful gain for an NA car, and even more so for those who are going to rev their motors out and increase the redline.
I would be eager to see both a 65mm and 76-80mm TB pulls to see how they affect the top end breathing, ut either way the 74mm throttle body should make for a very good performance gain.
At ~$2,400, will the fuel rails also come with the manifold and TB?
![P1070070[1].jpg](/data/attachments/92/92930-d396eb2aa28971456dabf2c1ead45ab6.jpg)
