tuning menu - Ken Gilbert

K-SERIES INTAKE
MANIFOLD SHOOTOUT
2. ENDYNE PORTED RBB -.2HP +11TQ
The “RBB” is a two-piece intake manifold that comes from the '04-08 TSX. This one
is owned by a k20a.org member who had it ported by Endyne with a special “K20”
specific port job. Endyne cut open the plenum to fully gut this beast out and then
welded the plenum back together.
4. SKUNK2 PRO K-SERIES
+10.4HP +2.4TQ
Behold the long awaited Skunk2 Pro K-series intake manifold. Still
fairly new on the market, I was able to borrow this manifold from a
fellow K20A.org member (pb16b aka Jason at Suja 1 Motoring). Now
this manifold was dynoed by a couple other K20A.org members who
didn’t have pleasing results. This did not discourage me.
If my engine weren’t limited to 9000rpm, this manifold would make
even more power as the curve keeps climbing. In comparison to the
RBC manifold there’s a fat gain of mid-range at 4500-5700rpm, then
power tapers off matching RBC’s power at about 5800-6100rpm,
then Skunk2’s power gradually takes off all the way up to redline.
www.storemags.com & www.fantamag.com
Erick reached the same wheel horsepower as the PRC, yet
gained 10lb-ft of torque with this manifold! The torque
increase is just amazing when comparing graphs against
the PRC. You can thank the RBB’s long runner design for
the increase in torque.
3. STOCK RBC +5HP +.6TQ
The “RBC” manifold is currently the most widely-used K-manifold to
upgrade to for the K20 and K24 engines. It especially shines on the
K24 Frankenstein swaps (K20 head/K24 block). Its design has short
runners and a large plenum, great for top-end power. In comparison
to the PRC, the RBC drops about 5hp in areas of the low end and
mid-range, but has better top-end power after 7200rpm to redline.
Final results made 219whp/144.6lb-ft torque.
5. BLUEPRINT RBC +5.3HP +1.3TQ
BluePrint Racing is one of the highest regarded K-series engine
building shops known. They offer services such as their popular
“BluePrint intake manifold” which is a thorough port job on the RBC
intake manifold. Their port job is geared towards the big boy K24A
engine builds. The BPR port job requires the cutting and opening of
the RBC plenum so the runners can be accessed more easily. Porting
is performed and once done, the cut plenum piece is welded back
into place.
We compared the BPR graph to the stock
RBC and there were significant low to
mid-range power gains made over the
RBC, yet top-end was only slightly better.
If my K20R were cammed I’m sure the
BPR manifold would respond even better.