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Interchangable cams?

Turbo Jim said:
You probably have another problem. I had this engine in my first 740 and it would pull happily to around 5k. Above that it ran out of puff, but gave a nice dollop of torque when you changed up.

The pierburg carb is a twin-choke unit, there's a little actuator which opens the second throttle at high load, I'd bet that's not working.
Click to expand...

nah it does still pull well up to 5000 but it makes a hell of a racket getting there lol
 
You probably want to put a larger carb on before you look at the cam - I bet that's a bigger hold-up. A swap to EFI would probably be the easiest way of doing things. Sadly, 'adjusting' a stock engine and getting good results is not trivial. It's harder in the short-term, but dropping in a complete higher power engine (turbo? 16v?) is usually 'easier' in the long-term.

I know what you mean about the 'racket'...it sounds "unhappy". Having done quite a bit of 'listening' to my car over the years, it tends to make those sort of "I don't like this" noises when it wants to breathe more air than you're giving it. My car used to sound nasty above 4000rpm. Now with the big carbs, it starts to sound rough above 5000rpm...with the wierd twisty 360 exhaust back-box removed, it sounds smooth right up to the limiter...so guess what needs work next!

The 1.7 Turbo units in the 400 series were of a heron head design, I believe.

cheers

James
 
[threadjack]
JV and I were talking about this just last night.
Any thoughts on how to fit some diesel injectors in there?
I'm thinking of VW's TDI injectors. Click here for pictures.
It looks like the injectors are WAY taller than spark plugs, and there where would I put glow plugs?
[/threadjack]
 
Janspeed said:
back on topic: B230K + K-cam + LH2.4 seems nice! Good mileage to?
Click to expand...

I used the boxes and injectors from a 230FK, since converting to injection was the first step towards having boost in my 245. I never had a good oportunity check highway milage on this setup because the FK went in about 3 months later. But mixed driving was better than the carb + K-cam and worse than carb + T-cam.

The B230K is a very common motor over here and E85 + Turbo has been tried more than once. What happens is excactly what people like A. Graham Bell tells you will happen. You would think that the cooling effect of the E85 would make it possible to have turbos on these motors, but it seems not. The Cosworth Heron turbo had pistons costing $10000 a piece, and was running crazy cold piston clearance.

As a side note. Some people have managed to get really good NA performance out of these motors (Rally/Rallycross). The exhaust is supposed to flow really well.
 
you can make a Hesselman Diesel out of it pretty easy. Spark ignition, low compression and diesel/air mixture into the intake. Not as good as the true Diesel engine, but maybe nice to experiment with. Just use the pump + injector from a oil burner home heater, jb weld it after the throttle plate and try to get it running by setting the thottle plate... yadda yadda
/threadjack

Volvo used this in the early 1960s for their trucks.
http://www.volvo.com/trucks/global/en-gb/aboutus/history/1940s/LV15_and_LV24.htm

http://www.woodenboatvb.com/vbulletin/upload/showthread.php?t=58307
 
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