Low oil pressure on run stand.

[BeepBeepRR]

Yep will be checking everything..

 

[BeepBeepRR]

That first set of rod bearings was number 6 the second set which was number 5 was in the same shape. Since this is the rod journal closest to the number 4 cam bearing. I assume the others that are further away will be worse. I hope not but thats just my thoughts.

 

[bearman]

yep your thought is correct and of bearings are bearing and without lube you get heat friction and all the rest of the bad things. i hate to say this but you already know what i am going to say and that is complete tear down. yes it sucks but tear down is enough not two or three times. really what choice do you have need to know.

 

[BeepBeepRR]

Yea, I have already resorted to the fact that it has to be taken apart. Funny enough I was already looking at crank prices.. Good god forged cranks are expensive.. Lets just hope its not damage beyond the bearings..

 

[miller]

Good god forged cranks are expensive.. Lets just hope its not damage beyond the bearings..

Yeah they are! For the short amount of time run, fingers crossed. Mostly look for any bluing, would mean temper taken out from heat. Slightly scored? Those bearings are sacrifice, compared with the crank journals, hopefully okay. Maybe some clean up on all the crank journals, new bearings, and good to go, unless bad enough it needs to be ground.

Some agree, some don't, oil flow is good, but oil pressure is as much, if not more important. Not enough pressure...you have the results in your hands. Oil pressure 'forces' the parts to separate, the oil keeping the parts apart. Guessing you did pre-oil. Should be done minutes before firing off.

Done rattling off. Good luck with it! Can happen to the best of us.

 

[dvw]

I just replaced the bearings in a friend's 7.80 dragster. The oil filter line came out of the AN fitting. Turns out the builder used a PTFE fitting with stardard line. Ths happened at 330ft on an 1/8 mile track. Since the motor was behind him he never noticed. Made the full run and drove back to the pits before someone told him it was spraying all over. Yes he should have looked at the gauge. This was #1 rod. #1/2 looked like this the rest not to bad.

Swapped them all on my back. Crank was fine.
Doug

 

[BeepBeepRR]

I just replaced the bearings in a friend's 7.80 dragster. The oil filter line came out of the AN fitting. Turns out the builder used a PTFE fitting with stardard line. Ths happened at 330ft on an 1/8 mile track. Since the motor was behind him he never noticed. Made the full run and drove back to the pits before someone told him it was spraying all over. Yes he should have looked at the gauge. This was #1 rod. #1/2 looked like this the rest not to bad.

View attachment 645776 Swapped them all on my back. Crank was fine.
Doug

Well seeing that bearing gives me a little hope that my crank is fine.

 

[BeepBeepRR]

Ok got to 7 and 8 in the pictures they are from left to right 8,7,6,5 seven looks to be in the worst shape. The crank was perfect no bluing scarring or grooving.



Here are 4,3 left to right.



2,1 coming soon. Last prayer needed.. I think..

 

[bearman]

damn lucky my friend what about the top end. cam lifters etc are they good.

 

[BeepBeepRR]

Those will be next I have a good weekend coming up so will have time to check it out. Really hoping I didn't wipe the cam out.

 

[66Satellite47]

Well the rod bearings are not as bad a I had to chisel off my 426 wedge crank.

 

[BeepBeepRR]

Ouch all of these bearings came out easy. Just need to inspect the cam and lifters hope it all looks good worst case a set of cam bearings will be purchased.

 

[fratzog lover]

The bearings did their job. Sacrificial critters that they are. Good luck.

 

[bearman]

bbrr looks like the mopar god may have been watching out for you. have a great weekend update please when you find out more.

 

[BeepBeepRR]

Well took the roadrunner out for a drive today. Was running great then the sniper EFI started acting retarded. Stopped at a gas station to take a leak and the car wouldnt idle or even stay running. Reset the computer and sat there for about 10 minutes messing with it. Finally was able to make it to the pump and put some more gas in it since the gauge isnt very damn accurate. Fired it up and stayed running made it home with no further issues. Not really sure why it did that. Pretty sure it was not out of gas it would run as long as you kept the TPS about 3% Wondering if the TPS is going bad on it. This was the problem with the other sniper EFI that I put on the GTX. Holley sent a new one and also a O2 sensor. May have to get a new TPS. Since replacing the TPS on the GTX no more issues.

 

[BeepBeepRR]

Took a break from the 440 for today. But I have the main bearings and rod bearings back in the engine. Just need to check the cam and lifters. Looking through the distributor hole the cam looks like its ok. But I know it needs further inspection.

 

[BeepBeepRR]

Got back on the engine this morning and installed the pan,timing cover, balancer and all the other stuff. Stuck my drill into the hole and instantly spun up 80 psi then rotated the engine while spinning and got oil up to the rocker shafts. Put the distributor in locked it down and started the old girl up. Was able to do a proper cam break in. I think she survived the peabrain mess up I did. Sounded good and no clicking, ticking or knocking. Ran it for around 30 minutes but had to keep water spraying through the radiator 90 out today wasn’t helping but tried to keep it under 200 degrees for sure. But all in all a successful test run. Next rebuild this shitty carb or find a 850 Holley and run that. The crappy old edelbrock needs help.

 

[BeepBeepRR]

 

[BeepBeepRR]

Ran the engine at 10 btdc on the stand.. As a base I have always wondered where the sweet spot is. On the 383 in the roadrunner 15 btdc works with that car. The GTX 15 seems to be the magic number on that as well. I know its more about test and tune but without the engine in a car its hard to get that feed back.

 

[PRHeads]

That’s the way to dive right in and get it done!!