M50: Difference between revisions
(Created page with "=B25 (NON-VANOS)= Colloquially known as the M50B25NV, this model is not equipped with VANOS ==UPGRADES== ===STAGE 0.5-1.5=== ===STAGE 2.0+=== ===FORCED INDUCTION=== =...") |
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= | =UPGRADES= | ||
== | ==INTAKE== | ||
For most Stage 0.5-1.5 M50, an upgraded drop-in filter is usually perfectly fine and offers a similar power gain to a full intake system. At higher power levels, upgrading the intake system will be more worthwhile. | |||
=== | ==EXHAUST== | ||
The stock exhaust manifold is relatively good for OE. Upgrading this component is still a worthwhile investment, and can reduce weight, temperatures, and overall engine efficiency. | |||
A cat-back exhaust offers the least gains in comparison to intake and exhaust manifold. 57-76 mm (2.25-3 inch) diameters are ideal, though there is minimal difference beyond 65 mm (2.5 in) diameter at lower modification levels. Please consider the weight difference to power gain and decide what works best for you. | |||
== | ==HEAD== | ||
= | ===CAMSHAFT=== | ||
Read the [[camshaft]] page for more information. | |||
== | ===VALVETRAIN=== | ||
+1 mm oversized valves are a worthwhile upgrade. If you plan to rev high, the most important upgrades are valve springs and rockers. | |||
== | ==BLOCK== | ||
=== | ===PISTONS=== | ||
===FORCED INDUCTION=== | ===CRANK/RODS=== | ||
==FORCED INDUCTION== | |||
You can expect between 6-12 Hp per pound of positive pressure added for most forced induction setups. All M50 variants are able to handle 6-8 PSI relatively well without any internal modifications. With just ARP head studs and a quality head gasket, an otherwise stock M50 can handle 12-15 PSI relatively well. | |||
A tuned Motronic 3.1 ECU can handle 450 WHp relatively well without any sensor changes or large modifications. | |||
The B25NV MAF ('''M'''ass '''A'''ir'''F'''low Meter) is scaled to handle a maximum of about 280 WHp. | |||
The B25TU MAF is scaled to handle a maximum of about 330 WHp. | |||
A common upgrade is the M60 MAF, which is scaled to handle nearly 400 WHp. | |||
===TURBOCHARGER=== | |||
===SUPERCHARGER=== | |||
=B18 E30= | |||
=B18 E36= |
Revision as of 14:47, 6 June 2020
UPGRADES
INTAKE
For most Stage 0.5-1.5 M50, an upgraded drop-in filter is usually perfectly fine and offers a similar power gain to a full intake system. At higher power levels, upgrading the intake system will be more worthwhile.
EXHAUST
The stock exhaust manifold is relatively good for OE. Upgrading this component is still a worthwhile investment, and can reduce weight, temperatures, and overall engine efficiency.
A cat-back exhaust offers the least gains in comparison to intake and exhaust manifold. 57-76 mm (2.25-3 inch) diameters are ideal, though there is minimal difference beyond 65 mm (2.5 in) diameter at lower modification levels. Please consider the weight difference to power gain and decide what works best for you.
HEAD
CAMSHAFT
Read the camshaft page for more information.
VALVETRAIN
+1 mm oversized valves are a worthwhile upgrade. If you plan to rev high, the most important upgrades are valve springs and rockers.
BLOCK
PISTONS
CRANK/RODS
FORCED INDUCTION
You can expect between 6-12 Hp per pound of positive pressure added for most forced induction setups. All M50 variants are able to handle 6-8 PSI relatively well without any internal modifications. With just ARP head studs and a quality head gasket, an otherwise stock M50 can handle 12-15 PSI relatively well.
A tuned Motronic 3.1 ECU can handle 450 WHp relatively well without any sensor changes or large modifications.
The B25NV MAF (Mass AirFlow Meter) is scaled to handle a maximum of about 280 WHp.
The B25TU MAF is scaled to handle a maximum of about 330 WHp.
A common upgrade is the M60 MAF, which is scaled to handle nearly 400 WHp.