How could I not realize that....

[safe]

Originally posted by Steve@Rennsport

A dyno test would have shown a loss in low & mid-range torque with all those broken rings. Peak HP is not affected very much depending on many factors,....

So an worn old tired engine could still have most of itīs horses left, at least peak?

[Steve@Rennsport]

Originally posted by safe
So an worn old tired engine could still have most of itīs horses left, at least peak?

LOL,..There are too many factors at work here to make wide generalizations and I was referring to Erick's RSA engine where broken rings that show up in leakdown tests do not always show a serious reduction in peak HP.

The variables are valve sealing, ring sealing, camshaft timing and wear, etc.

If you have a worn, old tired engine, you could do a few runs on a Dynojet to see what it does at the rear wheels.

[Steve@Rennsport]

Originally posted by Erick
Thanks guys. I'm having the fuel injectors cleaned and rebuilt. And I'll check for vacuum leaks in the intake system. Does anyone know where to get a "wand" for a propane tank to test for leaks?

Thanks for all of the valuable info.

Erick

Erick:

Its pretty easy to make one,.....

I took a 8" length of 1/4" ID copper tubing and drilled 6 very small holes near one end. Then, I crimped that end in a press (you coud use a vice) so gas must flow through the holes.

I used a length of surgical rubber tubing to connect the copper tube to the propane torch after I removed the burner head.

Now, you have a device that allows you to introduce propane gas into small places all over the intake system,............

[Erick]

Originally posted by Steve@Rennsport
Erick:

Its pretty easy to make one,.....

I took a 8" length of 1/4" ID copper tubing and drilled 6 very small holes near one end. Then, I crimped that end in a press (you coud use a vice) so gas must flow through the holes.

I used a length of surgical rubber tubing to connect the copper tube to the propane torch after I removed the burner head.

Now, you have a device that allows you to introduce propane gas into small places all over the intake system,............

Beautiful! Great idea. Thanks.

Erick