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Re: problems with 604" predator motor [Re: johnzgarage] #794829
09/07/10 11:38 PM
09/07/10 11:38 PM
Joined: Nov 2008
Posts: 660
San Diego
formula S Offline
mopar
formula S  Offline
mopar

Joined: Nov 2008
Posts: 660
San Diego
Is the oil pump suction line collapsing? This would cause low oil pressure, or no oil pressure at all I have seen this happen first hand.

Re: problems with 604" predator motor [Re: B1Fish540] #794830
09/08/10 12:29 AM
09/08/10 12:29 AM
Joined: Sep 2008
Posts: 2,840
Flint, Michigan
B1Fish540 Offline
master
B1Fish540  Offline
master

Joined: Sep 2008
Posts: 2,840
Flint, Michigan
Quote:

Quote:

Quote:

i am really surprised that MM didn't find the problem!!!! was he aware of the oil pressure prob.?




yes, that was the reason we took it to them.




Thats unacceptable..whats wrong with Mike, anyway..shheesh...




When i ask that i should have also asked: "Is there anything your not telling us?" Sorry Mike, but thanks for your side of the story.

Re: problems with 604" predator motor [Re: go green] #794831
09/08/10 12:37 AM
09/08/10 12:37 AM
Joined: Dec 2006
Posts: 3,667
Arizona
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Chris'sBarracuda Offline
master
Chris'sBarracuda  Offline
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Joined: Dec 2006
Posts: 3,667
Arizona
Quote:

Its not the oil viscosity .
Oil weight, or viscosity, refers to how thick or thin the oil is. The temperature requirements set for oil by the Society of Automotive Engineers (SAE) is 0 degrees F (low) and 210 degrees F (high). The oil will be stable to the high limit operating zone .Are you suggesting the oil is far exceeding 300 to 400 F ?





That's basically what I was thinking. I can't see the water passages having anything to do with low oil pressure. Especially at start up... It should be up at 80-90+ lbs. There would be no heat in the engine to worry about..

The whole thing makes no sense..


Chris..

Re: problems with 604" predator motor [Re: Chris'sBarracuda] #794832
09/08/10 12:43 AM
09/08/10 12:43 AM
Joined: Jul 2010
Posts: 2,422
Pittsburgh PA
Eric Offline
top fuel
Eric  Offline
top fuel

Joined: Jul 2010
Posts: 2,422
Pittsburgh PA
My old motor is over at the "Farm" with BGR...if you look at the deck surface there is a channel ground from water passage to water passage because of a overfill of hard-block. This motor had 70#'s of oil pressure for 12yrs until the bearing issues this year. I doubt the issue is with the hard-block....but I'm no expert...


5.53 @ 125 1/8th on the launch control..more left in her!

Re: problems with 604" predator motor [Re: Eric] #794833
09/08/10 01:07 AM
09/08/10 01:07 AM
Joined: Sep 2003
Posts: 1,049
San Jose Ca.
boatracer572 Offline
super stock
boatracer572  Offline
super stock

Joined: Sep 2003
Posts: 1,049
San Jose Ca.
are you pushrod oiling? what lifters? is the block bushed? if so how big are the holes in the bushings? had a similiar prob. that I corrected,my mill was oiling way to much up top.I corrected It with a set of bushings with a.020 hole in the lifter.

6183979-0316081800.jpg (124 downloads)
Last edited by boatracer572; 09/08/10 01:14 AM.
Re: problems with 604" predator motor [Re: boatracer572] #794834
09/08/10 07:46 PM
09/08/10 07:46 PM
Joined: Aug 2010
Posts: 73
Hartford,MI
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goody340g Offline OP
member
goody340g  Offline OP
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Joined: Aug 2010
Posts: 73
Hartford,MI
Quote:

are you pushrod oiling? what lifters? is the block bushed? if so how big are the holes in the bushings? had a similiar prob. that I corrected,my mill was oiling way to much up top.I corrected It with a set of bushings with a.020 hole in the lifter.




we are using spray bars, i'm not sure what lifters, blocked is bushed and there are no holes in the bushings.

nice looking motor by the way

Re: problems with 604" predator motor [Re: goody340g] #794835
09/08/10 09:22 PM
09/08/10 09:22 PM
Joined: Sep 2003
Posts: 1,049
San Jose Ca.
boatracer572 Offline
super stock
boatracer572  Offline
super stock

Joined: Sep 2003
Posts: 1,049
San Jose Ca.
are you useing restrictors in the spray bars?

6185423-0316081141.jpg (128 downloads)
Last edited by boatracer572; 09/08/10 09:23 PM.
Re: problems with 604" predator motor [Re: boatracer572] #794836
09/08/10 09:34 PM
09/08/10 09:34 PM
Joined: Aug 2010
Posts: 73
Hartford,MI
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goody340g Offline OP
member
goody340g  Offline OP
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Joined: Aug 2010
Posts: 73
Hartford,MI
Quote:

are you useing restrictors in the spray bars?




don't think so but i'll check tomorrow.

Re: problems with 604" predator motor [Re: goody340g] #794837
09/08/10 10:18 PM
09/08/10 10:18 PM
Joined: Nov 2007
Posts: 778
Sherwood park, Alberta.
go green Offline
super stock
go green  Offline
super stock

Joined: Nov 2007
Posts: 778
Sherwood park, Alberta.
Quote:

Quote:

are you useing restrictors in the spray bars?




don't think so but i'll check tomorrow.




Uhhhhhh Houston we have a problem....



6.50 @ 226 MPH 4.25 @ 186 MPH
https://www.youtube.com/watch?v=YX86DHGKBo0
Re: problems with 604" predator motor [Re: moparniac] #794838
09/08/10 10:20 PM
09/08/10 10:20 PM
Joined: Jan 2003
Posts: 74,911
U.S.S.A.
JohnRR Offline
I Win
JohnRR  Offline
I Win

Joined: Jan 2003
Posts: 74,911
U.S.S.A.
Quote:

I thought there was muratic acid or whatever could eat that stuff out ...




It will also eat the other things in there like the block.

Re: problems with 604" predator motor [Re: boatracer572] #794839
09/09/10 04:03 PM
09/09/10 04:03 PM
Joined: Aug 2010
Posts: 73
Hartford,MI
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goody340g Offline OP
member
goody340g  Offline OP
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Joined: Aug 2010
Posts: 73
Hartford,MI
Quote:

are you useing restrictors in the spray bars?





there are 2 bars in each valve cover and only 1 bar(in each valve cover) has a restrictor.

Re: problems with 604" predator motor [Re: goody340g] #794840
09/22/11 09:56 AM
09/22/11 09:56 AM
Joined: Apr 2005
Posts: 2,128
Salt Lake City
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camastomcat Offline
top fuel
camastomcat  Offline
top fuel
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Joined: Apr 2005
Posts: 2,128
Salt Lake City
Goody, what ever happened to this motor? Did you ever find the problem?

Re: problems with 604" predator motor [Re: johnzgarage] #794841
09/22/11 05:35 PM
09/22/11 05:35 PM
Joined: Oct 2004
Posts: 354
Livonia Michigan
440dart Offline
enthusiast
440dart  Offline
enthusiast

Joined: Oct 2004
Posts: 354
Livonia Michigan
Quote:

Sounds like a cavitation problem , or a possible problem with the oil psi relief....




Bingo! I was thinking cavitation or oil pickup line,(assuming it has an external pickup) possibly colapsing.


Yes I live in Michigan, so there is still 1 light on
Re: problems with 604" predator motor [Re: formula S] #794842
09/23/11 12:33 AM
09/23/11 12:33 AM
Joined: Dec 2007
Posts: 266
iowa
R
rook440 Offline
enthusiast
rook440  Offline
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Joined: Dec 2007
Posts: 266
iowa
Oil suction line from the pan collapsing does exactly that ,pull the line and replace it ....had it happen on a 474 inch bb on the dyno a few weeks ago ....started with 50 lbs then would start droping till 0...all in 2 or 3 minutes ..we checked everything ...oil suction line from the pan was collapsing inside ,replaced it and all was well ...good luck..

Re: problems with 604" predator motor [Re: rook440] #794843
09/24/11 03:00 AM
09/24/11 03:00 AM
Joined: Jun 2007
Posts: 103
NEW JERSEY
BIGSPEED Offline
member
BIGSPEED  Offline
member

Joined: Jun 2007
Posts: 103
NEW JERSEY
Problems like these are why we dyno every engine we build.On this engine you need to systematically follow the oil path to find the hemorage or determine if it is a oil temp problem.Bill C.


Ceralli Racing Engines & Checkered Flag Machine Racing engines , CNC porting & induction development http://www.checkeredflagmachine.net/
Re: problems with 604" predator motor [Re: joshking440] #794844
09/24/11 10:20 AM
09/24/11 10:20 AM
Joined: Jan 2003
Posts: 11,701
Portage,michigan
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B3422W5 Offline
I Live Here
B3422W5  Offline
I Live Here
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Joined: Jan 2003
Posts: 11,701
Portage,michigan
Quote:

Goodson....what the hell are you doin taken that motor to Rutgers..... Hows Ernie and your Dad doing...been a while since I have seen you guys, are you going to Norwalk for the Classic? I see Jacobs is running the points...hit me up





Exactly...as far as i know rutgers does mainly chevy stuff, doesnt have any sort of machine shop of their own, they just send stuff out to be machined and screw stuff together.

I would never take an engine of that magnitude to somebody like that


69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight
418 BPE factory replacement headed stroker, 565 lift solid cam
Best so far, 10.40 @127 1/4
1.41 best 60 foot
6.60 at 103.90 1/8

Re: problems with 604" predator motor [Re: B3422W5] #794845
10/13/11 03:58 PM
10/13/11 03:58 PM
Joined: Nov 2010
Posts: 1,397
Carson City, Nevada
Biginchmopar Offline
pro stock
Biginchmopar  Offline
pro stock

Joined: Nov 2010
Posts: 1,397
Carson City, Nevada
Did you find the problem yet?

I'm only interested because I'm currently putting together a Predator Motor. Different set-up pushrod oiled no spray bars and bushed lifters w/.025" holes in the bushing. The block is coming from KB and should be here in the next 30 days. 45* raised cam w/ predator top end. 596 CID 4.625" stroke x 4.530" bore.


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