Another "How much will it make?" Project "Special Needs"

General engine tech -- Drag Racing to Circle Track

Moderator: Team

Post Reply
CGT
Guru
Guru
Posts: 1199
Joined: Sun May 10, 2009 12:29 pm

Re: Another "How much will it make?" Project "Special Needs"

Post by CGT » Fri Jun 22, 2018 9:19 am

zums wrote:
Thu Jun 21, 2018 6:58 pm
did you figure out your previous problem?
Tom
Yes and No. Your advice was good it turns out, had Creason..who did the machining on the block, run a profilometer over it. Which is something he did when it was first done fortunately. There was a dramatic change in RA. It was very very smooth. So rehone, new rings...good finish etc. The question is.....what caused the dramatic change in surface finish in such a short time?

I feel like it will be fine now, just not sure how I ended up in this place to begin with. I did have some crazy crazy light oil expander in it. 4.005 expander low tension in a 4.040 bore. And it kinda got beat up, I knew that risk going in.,but I don't have a solid explanation of where my ring seal went to on the compression rings. It leaked down really good before, but definitely had issues, wouldn't pull any vacuum.


It does take more than 6#'s of torque to rotate it now. :lol:

zums
Guru
Guru
Posts: 1212
Joined: Sat Dec 08, 2007 10:57 am
Location: south jersey

Re: Another "How much will it make?" Project "Special Needs"

Post by zums » Fri Jun 22, 2018 8:14 pm

CGT wrote:
Fri Jun 22, 2018 9:19 am
zums wrote:
Thu Jun 21, 2018 6:58 pm
did you figure out your previous problem?
Tom
Yes and No. Your advice was good it turns out, had Creason..who did the machining on the block, run a profilometer over it. Which is something he did when it was first done fortunately. There was a dramatic change in RA. It was very very smooth. So rehone, new rings...good finish etc. The question is.....what caused the dramatic change in surface finish in such a short time?

I feel like it will be fine now, just not sure how I ended up in this place to begin with. I did have some crazy crazy light oil expander in it. 4.005 expander low tension in a 4.040 bore. And it kinda got beat up, I knew that risk going in.,but I don't have a solid explanation of where my ring seal went to on the compression rings. It leaked down really good before, but definitely had issues, wouldn't pull any vacuum.


It does take more than 6#'s of torque to rotate it now. :lol:
Thats good that you at least have something to watch, not knowing anything would be an expensive mystery, id be interested to know what the previous rvk numbers were before and after if Joe would disclose, you can pm me if you want to protect his info, if you are willing, ra dosent tell much by itself but i could see good cranking psi with bad oil control depending on surface finish, good luck on the pulls, 6lbs?, you are brave
Tom

randy331
Guru
Guru
Posts: 2885
Joined: Mon Dec 04, 2006 7:30 pm
Location: N.W. MO.

Re: Another "How much will it make?" Project "Special Needs"

Post by randy331 » Sat Jun 23, 2018 9:51 am

I wonder if it'd still be ok if it had vacuum on it from the start ?

Randy

GARY C
Guru
Guru
Posts: 4565
Joined: Tue May 14, 2013 10:58 pm

Re: Another "How much will it make?" Project "Special Needs"

Post by GARY C » Sat Jun 23, 2018 4:56 pm

randy331 wrote:
Sat Jun 23, 2018 9:51 am
I wonder if it'd still be ok if it had vacuum on it from the start ?

Randy
For ring seal or power confirmation?
For power it seems you would want a baseline from your previous test to know what effects what.

n2xlr8n
Expert
Expert
Posts: 501
Joined: Tue Jun 28, 2005 9:01 pm
Location: Bama

Re: Another "How much will it make?" Project "Special Needs"

Post by n2xlr8n » Mon Jun 25, 2018 9:23 am

randy331 wrote:
Sat Jun 23, 2018 9:51 am
I wonder if it'd still be ok if it had vacuum on it from the start ?

Randy
Hard to tell nowdays if you're being facetious or not, but I was thinking the same thing- and I was serious :lol:
He who is in me is greater than he who is in the world.

CGT
Guru
Guru
Posts: 1199
Joined: Sun May 10, 2009 12:29 pm

Re: Another "How much will it make?" Project "Special Needs"

Post by CGT » Mon Jun 25, 2018 9:57 am

n2xlr8n wrote:
Mon Jun 25, 2018 9:23 am
randy331 wrote:
Sat Jun 23, 2018 9:51 am
I wonder if it'd still be ok if it had vacuum on it from the start ?

Randy
Hard to tell nowdays if you're being facetious or not, but I was thinking the same thing- and I was serious :lol:
I think their is a chance it could have sealed up better, with vacuum on it from the start. But I think I would have been back into the engine eventually anyway from what I saw.

Post Reply