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.
422 dyno fail
- Thread starter Jim Ward
- Start date
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TT5.9mag
Two atmospheres are better than one
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.
PRH
Well-Known Member
A little rust in the exhaust port is quite a different story than “there’s water running out of the port”.
Glad you're getting it into the proper hands! Was the dyno guy the same guy that built the engine?
Yes
Seth Jones
Well-Known Member
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
B3422w5
Well-Known Member
Guy who is looking at his stuff now does my stuff . Mopar shop!
PRH
Well-Known Member
It’ll be interesting to see how this all unfolds.
That's what I 1st thought. He didn't seal the exhaust bolts/studs.
B3422w5
Well-Known Member
shouldnt be any water in the header bolt holes
PRH
Well-Known Member
The end holes go into water.
I thought I read on here there were wet exhaust holes. Thanks for clarifying.
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.
B3422w5
Well-Known Member
My Eddies and new heads do not go through water
Let me rephrase. Early cast OE heads have wet holes in all 4 corners. Ask me how I know? Haha
Thats most of the aftermarket for ya!
B3422w5
Well-Known Member
yes, forgot he was using OE heads. Haven’t had a set in forever
I thought OP used oem?
Oh yep I see now you're talking eddies.
512Stroker
We are all here because we are not all there.
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
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.
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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