When does the intake manifold switchover valve occur?
The intake manifold switchover (or changeover) valve internally switches the intake manifold from very long runners for low end torque to shorter runners for high end power. The switchover occurs at 3700 RPM.
Is there a check code for intake manifold?
Thanks to very useful info from raya, Check Codes, and senorking, along with what I learned from disassembling my intake manifold, I’m updating this OP with info I hope others may find useful.
Which is Mercedes engine has the longest intake pipe?
The Mercedes-Benz V6 engine features the longest intake pipes in the industry, a plus which provides outstanding low- and mid-range power. Cast into the super-lightweight magnesium intake manifold are long intake passages which spiral around to each cylinder.
Why are there two flaps in the intake manifold?
Incorporated into the manifold are two flaps that are closed below about 3,700 rpm, forcing intake air to take the “long route” through the manifold and build up pressure waves which boost the intake process and improve low- and mid-range torque.
What kind of aluminum intake manifold do I Need?
Aluminum intake will work with all Vortec cylinder heads, including P/N 12558060, P/N 19300956, P/N 19300955, P/N 19331470, or P/N 19331472 NOTE: The exhaust manifold from 1996-and-newer pickup trucks with RPO L31 350 engine, P/N 12557828, is drilled and tapped to accept an EGR tube.
How to replace a small block engine intake manifold?
NOTE: Replacing the ECU on MEFI 3 Ram Jet engine P/N 12495515 requires using new wire harness kit P/N 12499116, or use jumper wire P/N 88963118 to use MEFI 4 ECU as an open-loop system. Includes ECU module P/N 88962717, wire harness P/N 88961967, oxygen sensor P/N 19178918, intake air temp sensor P/N 25036751, and oxygen sensor fitting P/N 15156588
What kind of intake manifold does a marine engine use?
Cast Iron Marine Intake Manifold for 5.0/5.7 Vortec Engines with 8 intake bolts. Dual plane for 4 bbl carburetors. Replacement manifold for the No-Longer-Available Mercruiser 17618T manifold 454 / 502 Aluminum Intake Manifold with Brass Crossovers. For use on 454 and 502’s with square intake ports.
How many bolts are in a pre Vortec intake manifold?
Pre-Vortec intake manifolds require 12 bolts into cylinder heads. Increase horsepower from a 2 barrel carburetor and intake with a 4 barrel carburetor and this new GM intake manifold. Aluminum single plane high rise Performance manifold for 5.0L/305ci & 5.7L/350ci Vortec Marine engines. Intake manifold is secured to heads with 8 bolts.