Discussion in 'Intakes & TB Spacers' started by cb7atheart, Dec 6, 2014.
Has anyone ported the oem manifold to match a bigger TB!?
You realize the manifold is plastic?
No Shi'ite captain obvious.....
Easy man, he's just letting you know.
How about being respectful to others on the site. We are all here to help and be informative.
Also, do some research. There is plenty of info on the site for who has done what with the ZDX.
Plus, an adapter is needed. If anything, the adapter would need to be tapered. I am not sure if they are. Otherwise, never heard of "porting" plastic...not to say it isn't possible.
Honestly, a bigger TB would be the last bolt-on priority-wise. It will really only get you a couple of horses near redline.
Yeah, there has been quite a surge in the last several months of people adding the ZDX TB when it's not worth it.
A post made by VitViper on another site sums it up nicely:
I know people would like to keep their OEM manifold design for the low-end torque, but really if you are after better flow from an IM, just go RBC/RRC. Even if you could port the OEM manifold, I wouldn't bet on the results being worth the trouble.
Great info...damn i guess $500 for and RRC it is...:-p...but still dont know if i want to do more shtt to my daily...a nice tune should be enough...:-p..
vitviper has said the rrc/rbc will not show gains. He's posted a couple of threads showing before/after & it lost torque
On the rrc!? Lost of torque..i know on the rbc that is a fact...
rrc is almost identical to the rbc. People dynoed them both back to back on the 8th and there was no difference.
Today I had Daniel at Church Automotive dyno tune my car with a Port Matched RRC Intake Manifold.
I had the car dyno tuned with the Port Matched RBC Intake Manifold at Church Automotive and it made 247.3 hp and 177.1 tq.
I then had the car the dyno tuned with the Port Matched RRC Intake Manifold at Church Automotive and it made 246 hp and 174.4 tq.
To my surprise my car made less power with the RRC Intake Manifold.
Engine Mods are:
2008 TSX CAMSHAFT
AEM CAI V2 Heat Wrapped
BPI Velocity Stack
Skunk2 Race Header Heat Wrapped
Invidia Q300 Catback
2006 TSX Throttle Body
RDX 410cc Injector
Port Matched RBC Intake Manifold VS Port Matched RRC Intake Manifold
Hondata Intake Manifold Gasket
P2R Intake Throttle Body Spacer
P2R Throttle Body Gasket
Bold Blue is RBC Dyno Tuned
Pink is RRC Dyno Tuned
Thin Blue is a baseline dyno for the RRC
Yeah, I saw that. K24 is not high rev motor like K20 so intake manifold upgrades are useless. It's a same think for R18 too.
Really either leave it stock go forced induction. Bolt ons arent really worth it on this motor imo. Instead on spending $2k and getting 10 hp spend 3 to 3.5k and get at least a ct stage 1.
It seem like the down pipe/exhaust/tune route nets people some pretty decent gains though. Not a lot but enough that it seems worth it. Plus those mods are definitely supporting mods for FI routes later.
I would advise against trying to port the OEM manifold for the simple fact that it is injection molded plastic. Usually those have pretty tight tolerances and can be made pretty thin, which is I'm sure what they do to save material and weight. Unlike an aluminum sand cast manifold that leaves a fairly rough finish and thickness isn't as tightly controlled, I don't think you will have a safe enough margin of material to try and remove very much at all. The flange is probably the thickest part. Just my observations on that.
Agree with a lot of the comments...daily car so im not planning on doing alot...donwpipe..flashpro and just missing the tuned...other then that its fine for a daily...until i come across some srt4 at the light and i regret not going turbo lol...
Separate names with a comma.