New build thread.

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Nov 9, 2008 | 02:15 AM

#21

Tom-Guy

Thread Starter

0.0 BAR

Joined: Feb 2003

Posts: 0

Re: New build thread.

Quote:

Originally Posted by TunerToys

You can get a Telma off a big rig, didn't they used to call them Jake Brakes?.

Jake brakes are something different, pneumatic operation of valves to use the engine as a brake.

The cheapest retarder's I've found are in the $550 range and look dirty and abused. Meh.

Quote:

Originally Posted by rsmith2786

It could be done. You could make a mount to hold the motor and allow it to rotate only about the cranshkafts axis of rotation. Then attach a spring with a known spring rate to prevent it from rotating. Using your linear transducer you could calculate torque from linear displacement. Log RPM and displacement and BAM you have a dyno.

You do realise that a load cell is typically cheaper than a good transducer? I picked up a 1000lb S-beam load cell for $43 to the door.

Nov 9, 2008 | 02:17 AM

#22

Tough-guy

3.0 BAR

Joined: Jun 2006

Posts: 2,651

Re: New build thread.

Quote:

Originally Posted by Joseph Davis

Jake brakes are something different, pneumatic operation of valves to use the engine as a brake.

I thought they were a master fuel-cut used to compression brake down hills.

Nov 9, 2008 | 02:29 AM

#23

Smith-02

0.0 BAR

Joined: Apr 2006

Posts: 0

Re: New build thread.

Quote:

Originally Posted by Tough-guy

I thought they were a master fuel-cut used to compression brake down hills.

i'm not sure which diesel engine brake it is, but im thinking of one that double duties one of the valves in the cyl to pump air into itself. or pump air into it on an exhaust stroke, i dont remember