RESTRICTING OIL IN HEADS
#556189
12/17/09 01:18 PM
12/17/09 01:18 PM
|
Joined: Mar 2009
Posts: 1,169
Virginia Beach, VA
Old School
OP
super stock
|
OP
super stock
Joined: Mar 2009
Posts: 1,169
Virginia Beach, VA
|
i have sr,s with 1.7 t&d,s. when priming the motor,i noticed there was too much oil going up top. i do not oil thru the pushrods. i need to restrict the oil to the rocker arms. i talked to kenny at indy about this. he suggested putting a 1/4-20 brass set screw into the fittings for the oil lines,then drilling a .030" hole in the set screw. my question is,is that to small? i thought i read something about .060". kenny said that was too big.he said you wont even start restricting the oil until you go below .035". any thoughts.
68 cuda formula S 588" bb 5sp
70 CUDA CONVERT 500" 5SP (SUBLIME)
70 CUDA CONVERT 500" 5SP (PLUMCRAZY):TOO MUCH HORSEPOWER, IS ALMOST ENOUGH!
|
|
|
Re: RESTRICTING OIL IN HEADS
[Re: B G Racing]
#556195
12/17/09 02:33 PM
12/17/09 02:33 PM
|
Joined: Mar 2009
Posts: 1,169
Virginia Beach, VA
Old School
OP
super stock
|
OP
super stock
Joined: Mar 2009
Posts: 1,169
Virginia Beach, VA
|
Quote:
We never run external pickup and hi-volume pumps with out 8 quarts.Are you sure you were draining the sump? Maybe you were collasping the sucktion line ? 
it was not collasping the line,checked that.the oil pressure was creeping all over the place.it was going from about 20 to 50 pounds hot.the higher the rpm,s the lower the presure.when it went back to idle the pressure would go back up.when we shut it down for a few,then restart it,the pressure would be normal,for a minute.then it would fluctuate again.maybee 8 quarts would do the trick.i did not get a chance to try 8 as the motor was damaged on the dyno.when i added 7 quarts thou, i could see a difference in steady oil pressure.
68 cuda formula S 588" bb 5sp
70 CUDA CONVERT 500" 5SP (SUBLIME)
70 CUDA CONVERT 500" 5SP (PLUMCRAZY):TOO MUCH HORSEPOWER, IS ALMOST ENOUGH!
|
|
|
Re: RESTRICTING OIL IN HEADS
[Re: Old School]
#556196
12/17/09 02:41 PM
12/17/09 02:41 PM
|
Joined: Mar 2006
Posts: 9,910
Eighty Four, PA
B G Racing
master
|
master
Joined: Mar 2006
Posts: 9,910
Eighty Four, PA
|
Quote:
Quote:
We never run external pickup and hi-volume pumps with out 8 quarts.Are you sure you were draining the sump? Maybe you were collasping the suction line ?
it was not collasping the line,checked that.the oil pressure was creeping all over the place.it was going from about 20 to 50 pounds hot.the higher the rpm,s the lower the presure.when it went back to idle the pressure would go back up.when we shut it down for a few,then restart it,the pressure would be normal,for a minute.then it would fluctuate again.maybee 8 quarts would do the trick.i did not get a chance to try 8 as the motor was damaged on the dyno.when i added 7 quarts thou, i could see a difference in steady oil pressure.
A collasped line or air leaks on the pick-up or suction line or fitting act the same way.The inside lining may suck shut as rpms go up and relax as it goes to idle. What got hurt on the engine?
Last edited by B G Racing; 12/17/09 03:43 PM.
|
|
|
Re: RESTRICTING OIL IN HEADS
[Re: B G Racing]
#556197
12/17/09 02:59 PM
12/17/09 02:59 PM
|
Joined: Mar 2009
Posts: 1,169
Virginia Beach, VA
Old School
OP
super stock
|
OP
super stock
Joined: Mar 2009
Posts: 1,169
Virginia Beach, VA
|
i will cut a new section of hose when i redo the motor,just to be safe.this hose is about 10 years old.
the ptv clearence was too tight on the exhaust valves.the machine shop said they were .060".they missed something.i did not check myself thou.i'm trying 1.7,s ,and i guess the valve caught up to the piston too quick.i think they only used a dial indicator and not clay.the shop is covering it all. all exhaust valves hit. one broke off and holed the piston.i would have never thought they were hitting,as the motor was running good.
68 cuda formula S 588" bb 5sp
70 CUDA CONVERT 500" 5SP (SUBLIME)
70 CUDA CONVERT 500" 5SP (PLUMCRAZY):TOO MUCH HORSEPOWER, IS ALMOST ENOUGH!
|
|
|
Re: RESTRICTING OIL IN HEADS
[Re: B G Racing]
#556198
12/17/09 03:00 PM
12/17/09 03:00 PM
|
Joined: Oct 2009
Posts: 1,288
Oregon
sg66mopar
pro stock
|
pro stock
Joined: Oct 2009
Posts: 1,288
Oregon
|
Quote:
We never run external pickup and hi-volume pumps with out 8 quarts.Are you sure you were draining the sump? Maybe you were collasping the sucktion line ?
That's the setup I have with dual lines and a swinging pickup. Curious why you don't recommend it?
|
|
|
Re: RESTRICTING OIL IN HEADS
[Re: Keith Richards]
#556203
12/18/09 12:11 AM
12/18/09 12:11 AM
|
Joined: Apr 2007
Posts: 871
WA 98043
thecarfarmer
super stock
|
super stock
Joined: Apr 2007
Posts: 871
WA 98043
|
Stock vol pump, external pickup (swinging), single line, 6" deep dragster pan w/ trap door. Harland Sharps on Stealth heads here; .052" restrictors in the oil passages underneath the rocker shafts. Now the oil pressure gage comes up to about 10 PSI warm even if I idle down to <1000 RPM. Oil is 10/40. Will be going to a H.V. pump and see if I still have good idle pressure w/ 10/30 or even 5/30 oil. Maybe next summer, when the weather is decent...  -Bill
Seduce the attractive, and charm the rest.
******
489 C.I.D., roller cam, aftermarket heads, tunnel ram, stock '54 Dodge rear axle assembly: which of these doesn't belong?
|
|
|
|
|
As I get older my eyesight and dementia cause me to misread once in a while. 
