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Re: New 512 stroker build, ZERO power!
[Re: 1969RR]
#1062500
09/01/11 07:26 PM
09/01/11 07:26 PM
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Joined: Sep 2003
Posts: 2,966
Wendy, I'm home.
dstryr
master
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master
Joined: Sep 2003
Posts: 2,966
Wendy, I'm home.
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I have gone through a very similar situation with my new 505" 440, 10.2 compression, XS290 solid cam, Stealth heads and basically original 6bbl setup. A couple of years ago I put the Promax metering blocks/plates in all 3 carbs on the original motor in anticipation of my new motor being done. I wanted to be sure they ran ok before putting them on my new motor and if I had trouble didn't want to troubleshoot any unknowns. The original engine is/was pretty tired and the ran same with the promax stuff as it did with bone stock carbs. I've had 'em apart, shot carb cleaner through all the ports, new gaskets, etc. The new motor went in and was fouling plugs, even the hottest plugs I could find. It wasn't performing any better than the stock motor, and probably worse. No good, so I asked for some help and a racer not too far away dug into the carbs. The culprit- the center carb with the Promax metering block dumping fuel. What happened in the last couple of summers of driving? Who knows... He pulled the Promax block out and slapped the stock one back in, adjusted the outboards and now its running like it dyno'd - 590hp & 650tq. I just drove it home last night.   Hope you find your solution soon. 
dstryr, since 1986.
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Re: New 512 stroker build, ZERO power!
[Re: Sport440]
#1062501
09/01/11 08:35 PM
09/01/11 08:35 PM
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Joined: Jan 2003
Posts: 6,591
Canton, Ohio
Sport440
master
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master
Joined: Jan 2003
Posts: 6,591
Canton, Ohio
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Quote:
}Your either getting a dump load of fuel from one of your new 6 pac carbs{
or not getting the spark you need to ignite it at the right time.
The grey oil is not good. It could be the results of cylinder wash down of excess fuel in the cylinders, maybe taking out your rings to half life or more.
That was one of my earlier thoughts too
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Re: New 512 stroker build, ZERO power!
[Re: Exit1965]
#1062504
09/04/11 10:24 PM
09/04/11 10:24 PM
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Joined: Dec 2007
Posts: 266
iowa
rook440
enthusiast
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enthusiast
Joined: Dec 2007
Posts: 266
iowa
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Re: New 512 stroker build, ZERO power!
[Re: 1969RR]
#1062506
09/09/11 06:41 PM
09/09/11 06:41 PM
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Joined: Nov 2006
Posts: 635
mississippi
bentwheel43
mopar
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mopar
Joined: Nov 2006
Posts: 635
mississippi
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I think it may be the timing set,9key the timing mite be off.I had a 3 key and I had helll.I got a gear set on may 440source 512rb kit and used a 2* bushing.~~Bentwheel43
Last edited by bentwheel43; 09/09/11 06:44 PM.
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Re: New 512 stroker build, ZERO power!
[Re: 70blackfish]
#1062508
09/13/11 05:21 PM
09/13/11 05:21 PM
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Joined: Jan 2003
Posts: 74,948
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 74,948
U.S.S.A.
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Quote:
Dyno that motor after build...
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Re: New 512 stroker build, ZERO power!
[Re: bentwheel43]
#1062512
10/04/11 12:53 AM
10/04/11 12:53 AM
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Joined: Jul 2010
Posts: 417
reynoldsburg,ohio
poppaj
mopar
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mopar
Joined: Jul 2010
Posts: 417
reynoldsburg,ohio
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Sounds like a cylinder wall finish problem to me.
AA/NSS 65'Coronet "Whompin Wedge"
Pop & Son Performance 557" B-1 power
John Holt Chassis
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Re: New 512 stroker build, ZERO power!
[Re: poppaj]
#1062513
10/04/11 02:01 PM
10/04/11 02:01 PM
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Joined: Aug 2009
Posts: 740
Anderson, IN
1969RR
OP
super stock
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OP
super stock
Joined: Aug 2009
Posts: 740
Anderson, IN
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Quote:
Sounds like a cylinder wall finish problem to me.
Hey everyone! Haven't really had any news to post on this issue..until the last couple days. Poppaj, you have hit it on the head. Well, partly. I also found (well, the machine shop found) that the cam bearing journal was off. #2 off .002". Ate all the cam bearings, #2 completely destroyed. Found some metal embedded in 4 rod bearings. Don't know who's at fault?? I didn't do the machine work...I guess ME, I put the engine together. Anyway, I ruled out using this block. As, poppaj stated, the cyl wall finish was not to my liking. Just felt rough...So, I bought a different finished block. Figured if I had to re-bore my old one and buy new pistons, re-balance I'd just be better off getting a different block. New block looks great. The cyl walls look and feel very nice. Cam journals all perfect. All measurements coming out perfect. After doing a lot of reading (Muscle Motors has a great article about this) I found out after the fact that big block Mopars have issues in the cam journal area. Cost me some $$ to find this out! Anyway, going back together again! At the cam degreeing stage now. Thanks everyone! Jeff
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Re: New 512 stroker build, ZERO power!
[Re: Performance Only]
#1062517
10/04/11 09:20 PM
10/04/11 09:20 PM
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Joined: Aug 2009
Posts: 740
Anderson, IN
1969RR
OP
super stock
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OP
super stock
Joined: Aug 2009
Posts: 740
Anderson, IN
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Quote:
Quote:
After doing a lot of reading (Muscle Motors has a great article about this) I found out after the fact that big block Mopars have issues in the cam journal area. Cost me some $$ to find this out!
just a little food for thought, keep in mind that all of the old Mopar engines were running engines before and they didn't eat up cams or bearings. what do you suppose has changed since it was torn down and built back up as a performance combo? i would say very little. granted it's not uncommon for the cam bearing bores to be a little undersized, but with minor clearancing of the offending bearing it's not usually a big issue. anyway, like i said, food for thought.
My thought too. Why was the #2 .002" too tight? After all, it must have ran before. But with the new bearings, it was too tight. I didn't know about making a "cutter" out of an old cam. Just seems like a bad fix for a worse cause! New one's fit perfect. Hopefully will be running soon. Take care, Jeff
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Re: New 512 stroker build, ZERO power!
[Re: 1969RR]
#1062518
10/05/11 09:02 AM
10/05/11 09:02 AM
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Joined: Jan 2003
Posts: 74,948
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 74,948
U.S.S.A.
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Quote:
Quote:
Quote:
After doing a lot of reading (Muscle Motors has a great article about this) I found out after the fact that big block Mopars have issues in the cam journal area. Cost me some $$ to find this out!
just a little food for thought, keep in mind that all of the old Mopar engines were running engines before and they didn't eat up cams or bearings. what do you suppose has changed since it was torn down and built back up as a performance combo? i would say very little. granted it's not uncommon for the cam bearing bores to be a little undersized, but with minor clearancing of the offending bearing it's not usually a big issue. anyway, like i said, food for thought.
My thought too. Why was the #2 .002" too tight? After all, it must have ran before. But with the new bearings, it was too tight. I didn't know about making a "cutter" out of an old cam. Just seems like a bad fix for a worse cause! New one's fit perfect. Hopefully will be running soon. Take care, Jeff
The factory did the same thing , clearance the bearing , they were only concerned with the engine living past the warranty period .
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Re: New 512 stroker build, ZERO power!
[Re: 1969RR]
#1062519
10/05/11 02:36 PM
10/05/11 02:36 PM
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Joined: Aug 2003
Posts: 43,099
Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,099
Bend,OR USA
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Last edited by Cab_Burge; 10/05/11 02:37 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Was there, is there oil in the intake ports 
I have had many B and RB motors have that issue after blue printing, assemble the motor with the heads torque on and set the intake manifold on the motor WITHOUT the valley pan, use a feeler gauge(smallest one possible to start with and work up to one that won't fit) to see if it will fit in between the heads and intake 
)and take it to a good machine shop to have the manifold cut so it fits square on the motor 
