422 dyno fail

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512Stroker said:
Funny they did not tell you that there is a coolant leak issue when you picked up the engine. In any case the engine "water" issue should have been properly diagnosed prior to removing it from the dyno room.
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It was. I’m not sure what you missed?? It was removed from the dyno yesterday which was when I was notified and I picked it up today.
 
Jim Ward said:
Well I wouldn’t say “great news” but at least if what was told to me today is the culprit it was found. If what he suggested is true the heads will be boat anchors from what he told me. I have $2000 into this set of heads as I wanted to make a big HP iron headed motor.
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It does suck to put that much money into (any) a set of heads and not have them seal, but IMO this is exactly what a dyno is good for, finding the issues before it goes in the car. The hp numbers are just to judge the validity of parts selected and compare to known combinations. Not post on Instagram. So in that aspect I’d call it good news that it was noticed that it was not performing as expected and the issue was found prior to a disaster and prior to going in the car. Please keep us updated on what you find.
 
I have the motor at the correct place now. The guy who built my heads pressure checked them and they checked good. Instead of wiping his hands of the situation he is willing to take it one step further to ensure that if there are any problems he finds it. He already found the distributor was junk and plugs were not gapped correctly. I will pay for another dyno session once he further investigates. Makes it worth every penny to deal with honest people who still take pride in their name and work product. The other shop was simply stumped until he called to tell me water was running out of the exhaust ports when he took the headers off. Today that story changed to just seeing the rust.

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A little rust in the exhaust port is quite a different story than “there’s water running out of the port”.
 
How about water running out of the header bolt holes when he unbolted the headers? Maybe mistook that for water originating from the exhaust ports
 
All 4 corners of the header bolts on early small blocks are wet holes but I do know RTV was used on the bolts. I also thought about this….it was so humid in that dyno shop the floor had standing water on it. The relative humidity was high enough to cause rust on any motor sitting out for a week. The headers had obvious signs of exhaust leaks as well. I am confident Jack will figure this out and I have no problem paying him for his time and knowledge.
 
Let me rephrase. Early cast OE heads have wet holes in all 4 corners. Ask me how I know? Haha
 
Jim Ward said:
Let me rephrase. Early cast OE heads have wet holes in all 4 corners. Ask me how I know? Haha
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True the corner exhaust mounting bolts are wet, but you should never have water/rust in the exhaust ports especially with the short run time you have on that engine. I still say more analysis should have been done i.e. your ignition system is proof.
Many moons ago I dyno tested engines for a living a you have got me lost.
I will be watching for good results.
Much luck
Jim K
 
512Stroker said:
True the corner exhaust mounting bolts are wet, but you should never have water/rust in the exhaust ports especially with the short run time you have on that engine. I still say more analysis should have been done i.e. your ignition system is proof.
Many moons ago I dyno tested engines for a living a you have got me lost.
I will be watching for good results.
Much luck
Jim K
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I never dyno tested for a living but it would seem to me that a dyno tester who saw something amiss would suggest some troubleshooting a bit. Changing jetting, using a known good dyno carb, etc. When I went to have a dyno done on my car it was just for assessment on a dynojet. The owner and tester suggested that timing may be too far advanced and he would love to do a dyno tune and not just a test. He was a racer and knew his stuff. I will wait and watch attentively how this pans out and I hope to learn a lot from this. I am speaking not just what was wrong but how to navigate the build, test, retest etc. Good Luck.
 
Kent mosby said:
I never dyno tested for a living but it would seem to me that a dyno tester who saw something amiss would suggest some troubleshooting a bit. Changing jetting, using a known good dyno carb, etc. When I went to have a dyno done on my car it was just for assessment on a dynojet. The owner and tester suggested that timing may be too far advanced and he would love to do a dyno tune and not just a test. He was a racer and knew his stuff. I will wait and watch attentively how this pans out and I hope to learn a lot from this. I am speaking not just what was wrong but how to navigate the build, test, retest etc. Good Luck.
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I couldn’t agree more. It’s better if I spend it and allow others to benefit from what I’m paying to learn. I mean that in all seriousness. This has been a very good thread so far and I will update it once we spend more time with this motor. I am confident that it is in the correct hands now.
 
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