Lotus Elise Service Notes page 528

Lotus Service Notes Section XA
XA.22 - 34QR EXCHANGE 190 BHP ECM (A340M6026S) LSL394
The 190 BHP exchange engine ECM is designed for track use only, and includes the following features:
Modified fuelling and ignition maps;
Open loop fuelling;
Rpm limit raised from 7,800 to 8000 rpm;
Rad. fan switching point lowered from 104°C to 92°C.
The ECM is calibrated to optimise performance with the following performance parts fitted as a package:
Deletion of intake resonator valve.
A340E0011S 101° inlet camshaft pulley;
LOTAC05066S Stainless steel catalytic converter replacement pipe;
A340X6013S Breather kit (inc. breather rail blanking plugs & idle stub blanks);
A340E6011S 1 litre breather catch tank;
A340K6007S 82°C thermostat;
A340E0035S Oil cooler kit (RHD);
Exchange ECM (0.8 hr)
Replace the standard ECM with the 190 BHP version, and return the old unit to Lotus. A surcharge will
apply until the old unit is received.
Delete Intake Resonator Valve (0.6 hr)
Remove the air intake resonator valve and control mechanism including the vacuum reservoir and two
solenoid valves. Re-plumb the MAP sensor. Discard the secondary air cleaner at the airbox inlet, and connect
the intake trunking directly to the airbox, with the primary air cleaner at the front end of the trunking, which can
be sited close to, or connected to the air intake duct on the LH flank. Take care when washing, to avoid
directing jet wash equipment into the intake duct - blank off if necessary.
101° Inlet Camshaft Pullev (2.5 hrs):
The standard engine inlet cam timing is 105° ATDC maximum opening point. The modified pulley allows
the inlet cam timing to be advanced by 4° to 101° MOP.
1. Remove the timing belt top cover.
2. Turn the engine to align the timing mark on the crankshaft front pulley with the 'safe' position 45° ATDC
mark (12 O'clock) on the timing belt lower cover. Check that the camshaft pulley timing marks are
aligned towards each other; if not, turn a further 360°.
3. Slacken the belt tensioner clamp bolt, and remove tension from the cam belt.
4. Use special tool T000T1280 to hold the inlet camshaft pulley and release the retaining bolt. Withdraw the
pulley from the camshaft and timing belt.
5. Fit the new pulley to the camshaft with the T mark just above the timing mark on the exhaust camshaft
pulley and the dowel engaged in the pulley slot. Use special tool T000T1280 to hold the inlet camshaft
pulley and tighten the M10 retaining bolt to 65 Nm
6. Turn the inlet camshaft to align the inlet pulley T mark with the exhaust pulley 'EXHAUST' mark, and slip
the belt onto the pulleys ensuring that the drive side of the belt is tight and the crankshaft pulley is still
positioned at the 90° ATDC mark.
7. Using a 6mm hex. key, rotate the tensioner counterclockwise and align the centre of the indent on the
tensioner pointer with the index wire ensuring that the pointer approaches the index wire from above. If
the pointer passes the wire, release the tension completely and repeat the procedure.
8. Ensuring that the pointer does not move, tighten the tensioner bolt to 25 Nm.
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