Hi everybody I have a 89 Volvo 240 wagon. I have a m46 out of a Volvo 740 that I want to swap into the car but I cannot find a flywheel for the 240. I need a flywheel with a crank angle sensor on the top of the bell housing. Can anybody please help me find one

 

try Voluparts.com 404-352-3402

 

I called them and he said that he didn't know if he had anything good most of them are cracked or not resurfacible

 

You probably talked to Melvin, call back and ask for Bill (the owner) or William - see if you get a different answer.

 

the fact is, that by 1989, when LH2.4 came out, the vast majority of Volvos in the USA were automatics.

 

Did they even sell a LH 2.4 car with the M46? I thought by LH 2.4 they were using the M47 only. I don't know if the M46 & M47 use the same flywheel.

 

I seem to remember the m47 used a stepped flywheel and m45/m46 used a flat flywheel. With the correct height release bearing you could use a flat flywheel in place of a stepped. I used to keep the 2 versions of flat flywheels (6 or 8 bolt?) re-surfaced and waiting in stock - to eliminate the down time getting a flywheel surfaced - the clutch job could be completed immediately. That convenience ended with stepped flywheels and speed sensors.

And the OP could use the flywheel from the 740 - if it has the two pins in the back of it to trigger the engine speed sensor.

 

I guess my point is that if Volvo didn't ship any LH2.4 cars with the M46, then the flywheel out of the 740 wouldn't have the speed sensor thus making that flywheel unusable. That would imply that only M47 flywheels have the speed sensor. Is there anyone that can confirm this?

@Stephenstaly - Can you tell if the 740 flywheel has the speed sensor cutouts?

 

Fwiw, the m47 was not used with turbo cars, any turbo manuals were m46. So, were there any turbo manuals 1990+ (lh2.4), 740 or 940? Maybe world market cars, not US

 

There were 740NA manuals til 1992 in the US, using the M47... The 240 had manuals until the end run in 1993, also M47.

 

I decided not to manual swap the car until I find a m47 swap in a junkyard or someone with parts. I did however put the turbo on and it's super lean local tune shop says they can't tune the ecu bc it's factory idk how to wire any of that in can I do a draw through carb setup? A rising rate fuel management unit is probably not going to do hardly anything. Is there a option to upgrade injectors on a factory tune and watch the wide band and possibly a rrfmu after that? Any suggestions?

 

B230FT's had larger injectors. they also had lower compression, which can be faked with a thicker head gasket, different cams, and sodium filled exhaust valves (to deal with the extra heat). I think they also had ECUs with a different tune from the factory, but yea, those LH 2.2/2.4 ECUs' can't be field programmed, its canned inside them.

 

Wow - there are no words - Lets see, "put in manual trans" ( on a 89 240 wagon) , no instead " i'll just put a turbo on it"

Hope it's your toy and not your daily driver.

 

Easiest way to turbo a later model 240 is to find a working turbo 740 or 940 and swap the engine, transmission, and ECU over. You really should consider suspension upgrades as well. Check out Turbobricks as there is a lot of technical discussion about how to do this.

BTW - I don't think the M47 is a sturdy enough transmission to handle the higher torque of the turbos. I think they stuck with the M46 for them as it was a sturdier design. Others may know more though. For the automatics, you need the beefier AW71 instead of the AW70 to handle the turbo.

 

Yeah it's my toy my plan was to manuel swap it and turbo swap it I bought a turbo manual 740 for 200 bucks. I wanted to V8 swap it with a five-speed right now I just don't have a garage to do that in the car is from San Diego California and has no rust at all so I plan on keeping it for a long time even if I blow it up.

 

I am thinking about putting the b230ft injectors in and using a fuel management unit that runs off boost pressure

 

note that turbos and manuals aren't so hot together. your turbo spins down when you shift and takes time to build up boost again

 

Yeah my dad told me to leave the automatic in until i v8 swap it in the future. Do you think it's possible to put a carburetor on the inlet of the turbo and tune it that way? Instead of messing around with fuel injectors and a ton of money in tuning and aftermarket computers

 

um, the carb would go on the intake manifold, AFTER the turbo, where the throttle body is currently.... and I haven't seen or heard of a super or turbo charged car with CARBERETORS since the early 1970s, getting the fuel-air mixture right across the whole range of RPM and boost pressure would be a rather challenging problem. get it too lean, and burn holes in your pistons.

 

Ah yes the 70's when people were putting turbos with suck thru carbs on anything/everything - talk about turbo lag! I had a 1984 Biturbo Maserati in the mid 80's. It had a two barrel weber inside a pressurized box with two small turbos feeding it - When it ran correctly it actually worked well, and after the water cooled intercooler was installed - generated some impressive horsepower. Best part about the car was when the insurance company bought it from me after the not at fault accident totaled it!