low oil pressure after 1/4 mile?

[george a nilsen]

i have a new indy crate motor 426 wedge 488h.p. in my 68 roadrunner. it has 2000 miles on it. 400stroker 440 indy crank wesco 10.25 to 1 pistons ,eagle rods 292hyd. cam, indy 440sr heads withexterior oilers to heads, 1.5roller rockers , m1 intake ,750 demon carb, hi volumne oil pump, msd etc. heres what i did , i dumped the clutch at 3500rpms , ran it up to 6000 rpms in each gear(4 speed) going up a hill than backed off and hit the brakes to make a turn . my oil pressure dropped from 75psi to 25psi and the tappets were singing like no oil. i sat for less than a minute and the pressure came pack and tappets quited making noise.drove it down the road and autometer electric) gauge did alittle dance from 75 to 50 to 75 than seemed to be ok .i run mobil 1 snynth 10w40 and was a quart low. also have hemi oil pan.question did i float the lifters dry and this caused the oil pressure to drop? or was it because i was going up a hill? or was it from hitting the brakes to make a turn? does anybody have any info on this thanks george 68rr

[23T]

Are you running a windage tray?

[george a nilsen]

yes it has a windage tray.

[23T]

Did you modify your oil pick-up to match the pan and did you weld the oil pick-up tube in?

[george a nilsen]

i bought this engine from indy cylinder head. ill have to ask this question when i call them

[23T]

one last ? was the engine a qt low before you started the run or did the qt vaporize during the run?

[george a nilsen]

yes it was a quart low before the run

[BIG BLOCK BILL]

Weld the pick up tube ? Do you really want to weld the pick up tube to the block ? Bill

[hotrod7043]

1 gt low and hittin the brakes alitle hard and make aturn wiil make the oil slosh around in the pan, you said you have a hemi pan , what you call fulll with filter 7qts is full 6 for pan and 1 for filter , and welding a pick up on a wedge were that one come from "CHEVROTOILET owner"

[cuda66273]

I'm gonna shake my finger at you....Don't run this motor when it's low on oil. and that's a big period.

The total combination of events caused this delema.

[hotrod7043]

of course gettin a Indy motor didnt help.

[6pakman]

did i read that one post right? oil vaporising?? never heard of it!!chevrotiolet! thats a good one!!!

[george a nilsen]

pick up tube is screwed in ,why weld? hows it going to unscrew?

[hotrod7043]

like i said musta been a "CHEVROTOILET DOCTOR" that replied to that one.

[george a nilsen]

tell me whats wrong with indy motors. youve had problems with them?

[george a nilsen]

i didnt realize i was one quart low no excuse! but i just dont get it . what do you think???

[hotrod7043]

wel george i bben 30 yrs in the mopar parts buisness and idf i ever talked to any body the way i was talked to onthe phone iwould have been long gone, second dollar for dollar there stuff aint the best or the fastest for the buck/, i have a452 lowdeck with stage6 factory ported heads, 650 lift roller, my buddy has a 500in high deck with 3500 dollar porting in these 2800 dollars heads and we run same ets, alot of guys i have asked about the stuff dont have good things to say, thats my personal dealings with them.

[23T]

Not here to stir up a fight I'am 56 years old a have raced everything from go-carts to Top AA fuel no matter how the oil pick up goes in it can fail bad O ring, cracked thread @ the block. If you ever lock/ blow a $$$$ engine down because of your or someone elses error you may J-B weld yours. But every one builds there engines there own way and I was just asking questions that came to my mind. One last thought one the oil psi question. Do you have the right dip stick in their. You can drain the oil pan add oil when you get the right amt in check on the stick

[george a nilsen]

i really want to thank all you guys for your help because im stumped and sick with only 2000 miles on this motor.23t i installed a new dipstick added 7 qts with filter (hi-po mopar filter) and marked dipstick.

[hotrod7043]

ya indy told a buddy of mine to pull the15 grand motor and they
would tune it on dyno for500 a day

[23T]

After you marked the dip stick was it on the full line on the stick and most important was the qt low when the run was made showing qt low on the stick or something else. If all else is failing get back with your engine builder ASAP go over your problems and seeks there advice( did they send a copy of the dyno info) it's there engine and your $$$$$, they should have some type of warrenty ( if not look for better vendors). If they lock down and refuse to help you do have other Ave's unless you bought the motor with HAHAHA we got your $$$$$

[kadams4458]

Originally posted by george a nilsen
pick up tube is screwed in ,why weld? hows it going to unscrew?

I very vividly remember building the lower end of something a number of years ago. I believe it was a 318... Anyway... You'd think that the pick-up tube being threaded into the pump body would be fine...

It was not!

Approximately 1000 miles after being assembled the motor was fried due to lack of lubrication.

The cause?

The pick-up tube somehow managed to turn in the pump body.

Solution?

Well, do what you want... Risk a pick-up tube that can move out of proper position. Or, you can be smart and tack weld that sucker in place. I know what I'll always do from now on. Weld it! It's cheap insurance!

[cuda66273]

My personal experience with Mopars has taught me to use a single weight oil....I have used multi weights and the same problem occurred....I switched to Kendall straight 30 Summer and 40 fall and spring oil pressure is steady and doesn't fluctuate anywhere near like it did with the multi grade.

I don't know if indy suggested or demanded that you run the synthetic or if they make a synthetic in a single grade but you may want to do some research.

[hotrod7043]

never had a problem with a mutli grade or a syntheic , hisproblems were oil, hard lt turnon the brakes oil sloshing basically