Previous Thread
Next Thread
Print Thread
Page 2 of 2 1 2
Re: very low oil pressure on 511 [Re: Glen440] #685682
05/03/10 08:27 PM
05/03/10 08:27 PM
Joined: Jan 2003
Posts: 16,917
NC
440Jim Offline
I Live Here
440Jim  Offline
I Live Here

Joined: Jan 2003
Posts: 16,917
NC
Quote:

it has a solid roller cam with .760, .716 lift with 1.7 T&D shaft rockers. Maybe the lifters are uncovering the oil feed?


It could be the lifters/bore, but I don't think so. That is not a lot of lobe lift:

.760"/1.7 = 0.447"

So a normal 1.5 rocker arm (stock head) would only be 0.670" valve lift with that cam. And tons of guys have run that in stock blocks, rocker ratio, etc. And on top of that, the roller lifters from IMM should not be a problem at that lobe lift either.

Re: very low oil pressure on 511 [Re: 440Jim] #685683
05/03/10 08:31 PM
05/03/10 08:31 PM
Joined: Feb 2007
Posts: 6,295
U.S.
M
moparniac Offline
master
moparniac  Offline
master
M

Joined: Feb 2007
Posts: 6,295
U.S.
Also when I measured for my pushrods I went by T&D instructions.. see #3



Mopar Performance
Re: very low oil pressure on 511 [Re: moparniac] #685684
05/03/10 08:36 PM
05/03/10 08:36 PM
Joined: Sep 2003
Posts: 1,397
Toronto Ontario, Can
Glen440 Offline OP
pro stock
Glen440  Offline OP
pro stock

Joined: Sep 2003
Posts: 1,397
Toronto Ontario, Can
I went by their instructions, took 2 tries to get the right pushrods as measuring my checking pushrod and what showed up were .050 different which is around a full turn and were too long. I have 8.950 in the intakes and 8.900 in the exhaust. Only had to send 8 back, plus took 3 tries to get 8.950's as they kept sending some 8.050 in the 8.950 package. offset rollers in the intakes as well.


87 dakota 6.1 hemi
Re: very low oil pressure on 511 [Re: Glen440] #685685
05/03/10 08:38 PM
05/03/10 08:38 PM
Joined: Feb 2007
Posts: 6,295
U.S.
M
moparniac Offline
master
moparniac  Offline
master
M

Joined: Feb 2007
Posts: 6,295
U.S.
With the offset lifters mine were 2 different lengths also...


Mopar Performance
Re: very low oil pressure on 511 [Re: Glen440] #685686
05/03/10 08:45 PM
05/03/10 08:45 PM
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY Offline
Master
MR_P_BODY  Offline
Master

Joined: Jun 2003
Posts: 52,972
Romeo MI
Should I use a high volume pump this time around?




Sounds like you sure need one.... pressure is a by
product of flow VS restriction... you either dont have
much flow or it doesnt have much restriction (bearings
or the lifters are coming out of bores) and you say
the lifters arent coming out and .003 for bearings is
fine(dont remember what your bearing clearance is)
so if the other stuff is fine, then your lacking flow

Re: very low oil pressure on 511 [Re: MR_P_BODY] #685687
05/03/10 09:00 PM
05/03/10 09:00 PM
Joined: Sep 2003
Posts: 1,397
Toronto Ontario, Can
Glen440 Offline OP
pro stock
Glen440  Offline OP
pro stock

Joined: Sep 2003
Posts: 1,397
Toronto Ontario, Can
The bearing clearances are good. I had the machine shop that did the bore and hone measure everything.

It looks like there is not much flow. I have the valvetrain out so I was pulling lifters up while priming to see what was going on. It does not make enough pressure to get any oil out the top of the lifter. You pull a lifter right out and its not a constant flow of oil out the big hole.


87 dakota 6.1 hemi
Re: very low oil pressure on 511 [Re: Glen440] #685688
05/03/10 09:06 PM
05/03/10 09:06 PM
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY Offline
Master
MR_P_BODY  Offline
Master

Joined: Jun 2003
Posts: 52,972
Romeo MI
Are you SURE all the plugs are in the oil galleys,
a stock pump should flow enough to give you decent
pressure.... I'm just asking

Re: very low oil pressure on 511 [Re: Glen440] #685689
05/03/10 09:08 PM
05/03/10 09:08 PM
Joined: Nov 2004
Posts: 3,544
Syracuse,NY
CompWedgeEngines Offline
master
CompWedgeEngines  Offline
master

Joined: Nov 2004
Posts: 3,544
Syracuse,NY
Glen,

Is there any chance you are sucking the inside wall ( rubber) of the braided suction line in? IE: A collapsed oil line? Check that suction line. No way something got into the pick up ? IE rag, towel etc? Just thinking out loud. Seems like a suction side problem.


RIP Monte Smith

Your work is a reflection of yourself, autograph it with quality.

WD for Diamond Pistons,Sidewinder cylinder heads, Wiseco, K1 rods and cranks,BAM lifters, Morel lifters, Molnar Technologies, Harland Sharp, Pro Gear, Cometic, King Engine Bearings and many others.
Re: very low oil pressure on 511 [Re: CompWedgeEngines] #685690
05/03/10 09:17 PM
05/03/10 09:17 PM
Joined: Sep 2003
Posts: 1,397
Toronto Ontario, Can
Glen440 Offline OP
pro stock
Glen440  Offline OP
pro stock

Joined: Sep 2003
Posts: 1,397
Toronto Ontario, Can
Anything is possible, I put the pan on last wed and left the engine upside down so a rag is unlikely. I had it in the parts washer and cleaned the pickup and blew it out with air. I can make a new suction line, maybe it got hurt putting it in the car.

Pbody, my very first thought was the 2 plugs in the front so I pulled the front apart and looked and they are in there, the back ones must be or I would have oil everywhere. I plugged the internal pickup at the pump and inside by the crank. Is there anymore?

Maybe the pump cover has something wrong with it?


87 dakota 6.1 hemi
Re: very low oil pressure on 511 [Re: Glen440] #685691
05/09/10 11:39 AM
05/09/10 11:39 AM
Joined: Sep 2003
Posts: 1,397
Toronto Ontario, Can
Glen440 Offline OP
pro stock
Glen440  Offline OP
pro stock

Joined: Sep 2003
Posts: 1,397
Toronto Ontario, Can
I don't exactly know what was wrong with the oiling system. I put a different relief valve in and it got more oil pressure. I put a new high volume pump on it because I was gonna take the pump off anyway. I decided to run the suction line differently to elimate one 90 fitting and the line is almost completely straight now. Maybe the bend in the line was an issue? I did not take the pan off. I can get 60 psi priming it now and cold it has 75 at idle. I had it running for about 10 min yesterday and forgot what it had hot, maybe 25 at idle. I also had the oil heater on for a couple hours so the oil was warm before it started. Its real cold here right now, weather is strange. Some snow.

I'm just about to put the K frame back in, had to do some hacking on it to fit the oil line.

At least its fixed.


87 dakota 6.1 hemi
Re: very low oil pressure on 511 [Re: Glen440] #685692
05/09/10 11:46 AM
05/09/10 11:46 AM
Joined: Jan 2003
Posts: 16,917
NC
440Jim Offline
I Live Here
440Jim  Offline
I Live Here

Joined: Jan 2003
Posts: 16,917
NC
Quote:

At least its fixed


I agree with that. Sounds like the pump and relief may have both been an issue. I don't know about the lines.
Quote:

I have a static pickup in the pan with #12 line feeding the pump. This pump and pan setup worked when last ran.



Re: very low oil pressure on 511 [Re: 440Jim] #685693
05/09/10 02:20 PM
05/09/10 02:20 PM
Joined: Sep 2003
Posts: 2,175
Duloc
T
The Shadow Offline
top fuel
The Shadow  Offline
top fuel
T

Joined: Sep 2003
Posts: 2,175
Duloc

It's nice that you found it and it wasn't a wole lot of $$$$ to fix.
Looks like next weekends racing is a go.


Page 2 of 2 1 2






Powered by UBB.threads™ PHP Forum Software 7.7.1