My 427 SOHC Build..... Finally the time has come!

[cobracammer]

I saw all of the go-pro suction marks on the car when I got it back, so I'm sure they got pretty good footage!  I'm excited to see myself.

[turbohunter]

So? How’s it running?

[cobracammer]

LOL  Much better!!!  The part where they changed the Cam selection to "2" up from "4" goes against everything FiTech says in their instructions....  But when I visited the guys on set, they said they had them on the phone when they were trying to lean it up a bit..... and they couldn't get it either......until they changed the Cam Selection to 2.  Then it allowed them to lean it up at idle.  Don't know why, but I am greatful it worked!

Since that time, I have also changed the brakes over to Wilwoods.  6 piston's in the front and 4 pistons in the rear.  Rotors are drilled and slotted.

And am in the middle of adding in a Moroso 3qt Accusump.  Even through its advertised as a 3 qt, the accusump holds 1.5 quarts of oil (plus what ever amount in the actual lines running to the engine) when the pre-charge is set to 10 psi, which is the precharge they recommend.  Planning on 8 quarts in the pan plus the 1.5 on the accusump for a total of 9.5 quarts. 

[jayb]

Glad to hear you are adding the Accusump!  Especially with the oil pan on your engine, that will give you a great safeguard against loss of oil pressure.

[cobracammer]

Thanks Jay.  Yes, got the Accusump installed and all plumbed up.  I managed to get a "nifty" pressure chart (which does not come with the actual product) that lets you know the capacity given various pre-charges and oil pressure while running.

The youtube video's suggest a precharge of somewhere between 10psi and 15psi.  That would give me a capacity of 2.5 quarts, but very little "backpressure" to push that oil into the engine.  Looking at the chart, at about 40 PSI, the capacity is 2 quarts at 70 PSI of oil pressure.  I feel like at only a reduction of a half quart in capacity, I get more back pressure to push the 2 quarts in reserve into the engine when needed.

It may need some fine tuning as I go, but if I remember correctly, at like 2500 rpm the oil pressure stays up around 70.   Anyone, please feel free to put in any thoughts on use or setup.

One thing I did want to mention is that with an accusump, you are not supposed to use an oil filter with a bypass!  So I had to switch over to an oil filter without a bypass.  Would feel better if I could have stayed with a bypass filter  :0)

[machoneman]

And what is the oil filter and number you did use?

[Mistral_427TP]

Could you post a picture of your "nifty" pressure chart?  I'm using a Moroso 3qt Accusump.

[cobracammer]

Hi Mistral,

After Photobucket, I never found another picture "host".  If you give me your email address, I can send it to you.

Machoneman:  Its a Jomar 9025 (purchased from Jegs).  Part # is 519-9025.

[turbohunter]

After Photobucket, I never found another picture "host".

Try these guys.
Use the largest resize.
https://postimages.org

[machoneman]

Hi Mistral,

After Photobucket, I never found another picture "host".  If you give me your email address, I can send it to you.

Machoneman:  Its a Jomar 9025 (purchased from Jegs).  Part # is 519-9025.

THX!

[jayb]

Jason, the Accusump precharge is with an empty unit.  By the time it fills with your 2-1/2 quarts of oil, it will be under the same pressure as the oil in the engine, maybe 70-80 psi.  So your first quart of oil will go in at close to the same pressure as the normal oil pressure.  Your last half quart could go in with only minimal pressure, down as low as the precharge pressure, but it will only go in at that pressure if the oil pump is providing even less pressure.   I don't think even with your oil pan you would get down that low, unless there was a big hole in it 

Remember also that the oil will only go into the engine if the oil pressure from the pump drops.  When you are idling at 20 psi of oil pressure, most of the oil will be out of the Accusump and in the engine.  Then, when you start driving down the road at 70 psi, that extra oil is forced back into the Accusump.  Think of it more as a pressure reservoir, designed to keep the oil pressure up in case the oil pump runs dry for some reason.

[67428GT500]

No link to the video?

[Mistral_427TP]

Hi Mistral,

After Photobucket, I never found another picture "host".  If you give me your email address, I can send it to you.

Machoneman:  Its a Jomar 9025 (purchased from Jegs).  Part # is 519-9025.

 
 Thanks cobracammer.   My email address is:  cobra @ idirect.com   remove spaces!

[cobracammer]

Jason, the Accusump precharge is with an empty unit.  By the time it fills with your 2-1/2 quarts of oil, it will be under the same pressure as the oil in the engine, maybe 70-80 psi.  So your first quart of oil will go in at close to the same pressure as the normal oil pressure.  Your last half quart could go in with only minimal pressure, down as low as the precharge pressure, but it will only go in at that pressure if the oil pump is providing even less pressure.   I don't think even with your oil pan you would get down that low, unless there was a big hole in it 

Remember also that the oil will only go into the engine if the oil pressure from the pump drops.  When you are idling at 20 psi of oil pressure, most of the oil will be out of the Accusump and in the engine.  Then, when you start driving down the road at 70 psi, that extra oil is forced back into the Accusump.  Think of it more as a pressure reservoir, designed to keep the oil pressure up in case the oil pump runs dry for some reason.

Hi Jay,

OK so if I keep the 10-12 psi recommended precharge, then I will have 2.5 quarts capacity.  When I am at idle (warm), and have like 20-25 psi oil pressure, there will be only a little oil (negligible in the accusump (20 PSI in the engine and only 14PSI holding it back in the accusump precharge).

So then I go out for a drive, and at 2500 to 3000 RPM, I am at about 70 - 75 psi engine oil pressure.  At this oil pressure, the full 2.5 quarts is pushed back into the accusump.

Then say I hit high RPM's while shifting or hard cornering and the engine oil runs low in the pan and the pressure starts to drop....The accusump will inject oil back into the system.

I think where I get hazy is.....  Its getting injected back into the engine at the high RPM pressure of 70 PSI right?  Basically at 14 PSI precharge, I am just ensuring the piston in the chamber completly pushes all the oil out...... and has no effect on what pressure its injected back at?  Does that random line of thought sentence make sense?  :0)

Thanks again 

[cobracammer]

No link to the video?

Sorry, no video.  You can watch the Carfix episode on your DVR on demand  Its season 7 episode 9 ( I think) called "Cammer Saleen"  :0)