Hi guys I am a new member but am mechanically knowledgeable, used to own volvo dealership and build race cars, getting older now just want to speed up my 240 GLT, maybe a car some of the older members recognise H124 GBP.
Thinking of putting a 940 turbe engine into it,
1) What is the std boost pressure on the LP and HP
2) Is there any difference in the engine internals, eg pistons, crank, rods etc
3) Do all 940 after 1994 have the stronger M90 gearbox.


Our garage, ( still run by my brother, GMC motorsport ) have a lot of experience putting superchargers on cars so that is the other option, get a cheap 940 for the engine and box and take the turbo off and supercharge it as it would be a lot easier to control boost pressure and more importantly the rate of pressure rise as it is uniform to engine speed, whereas fitting a bigger turbo can be a recipe for all or nothing power,

Richard

 

Well, where are you? Because the M90 was never imported to the US, and neither were any 940 with any manual boxes. The LP turbo likewise never made it. As far as the "squirter", beefed up motors, they are in the 1993-95 940.

 

US model 940 turbos were, as lev says, all the HP version, B230FT engine. max stock boost is about 10 psi, and they develop the boost quite early and quickly, and wastegate any excess. This configuration stock was rated at 160HP and 195 ft-lbs.

the 940 Turbos are all Bosch LH 2.4 injection with EZ116k ignition.. this same system was used on 1989+ 240's, but on an older model you'll either need to transplant and integrate the engine harnesses from the LH 2.4 engine, or go completely wildcat with megasquirt etc.

for going beyond stock, you might check out the turbobricks forum, those jokers have all sorts of recipes for beefing these up, this forum is more about stock. 250HP is quite doable, but above that you start needing to do major transmission and rear end upgrades.

Every US model 940 Turbo I've seen has the AW71 automatic, which is the beefier version of the AW70 used on mid 80s and later 240's and most non-turbo 740/940 automatics (early 740's used a ZF transmission). This is essentially a heavy duty version of the same transmission used on many RWD toyotas from the 80s,90s, its a 3 speed plus overdrive. the transmission is cable and hydraulically controlled, except the overdrive lockout solenoid is electric. The AW71 will be good to about 250HP unless you're really flogging it.