8,000+ rpms safe with wet sump?
05-26-2007, 10:34 PM
#1
8,000+ rpms safe with wet sump? I've been doing some research and I keep coming up with different opinions on what is or isn't safe with the factory style wet sump oiling system. I would like to turn my 434 LS1 to 8,000 rpms.
With that said, I'm already turning it to 7500 with the stock pan, pickup, and a ported LS6 pump. I have had zero problems so far. If I went with one of the melling pumps or moroso along with the moroso pan/pickup why couldn't an LSx engine be turned to 8,000 or even 8,500 rpms? Possibly even the addition of an Accusump for peice of mind.
If the problem is sucking the pan dry, wouldn't an accusump take care of that problem on a drag engine that sees only a few seconds of high rpms at a time?
Is there anyone turning their LSx engines over 8k with a wet sump system?
With that said, I'm already turning it to 7500 with the stock pan, pickup, and a ported LS6 pump. I have had zero problems so far. If I went with one of the melling pumps or moroso along with the moroso pan/pickup why couldn't an LSx engine be turned to 8,000 or even 8,500 rpms? Possibly even the addition of an Accusump for peice of mind.
If the problem is sucking the pan dry, wouldn't an accusump take care of that problem on a drag engine that sees only a few seconds of high rpms at a time?
Is there anyone turning their LSx engines over 8k with a wet sump system?
05-27-2007, 12:17 AM
#2
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Originally Posted by 5LTREATR
I've been doing some research and I keep coming up with different opinions on what is or isn't safe with the factory style wet sump oiling system. I would like to turn my 434 LS1 to 8,000 rpms.
With that said, I'm already turning it to 7500 with the stock pan, pickup, and a ported LS6 pump. I have had zero problems so far. If I went with one of the melling pumps or moroso along with the moroso pan/pickup why couldn't an LSx engine be turned to 8,000 or even 8,500 rpms? Possibly even the addition of an Accusump for peice of mind.
If the problem is sucking the pan dry, wouldn't an accusump take care of that problem on a drag engine that sees only a few seconds of high rpms at a time?
Is there anyone turning their LSx engines over 8k with a wet sump system?
With that said, I'm already turning it to 7500 with the stock pan, pickup, and a ported LS6 pump. I have had zero problems so far. If I went with one of the melling pumps or moroso along with the moroso pan/pickup why couldn't an LSx engine be turned to 8,000 or even 8,500 rpms? Possibly even the addition of an Accusump for peice of mind.
If the problem is sucking the pan dry, wouldn't an accusump take care of that problem on a drag engine that sees only a few seconds of high rpms at a time?
Is there anyone turning their LSx engines over 8k with a wet sump system?
05-27-2007, 07:27 PM
#5
The problem with the factory oilling system and block is aeration of the oil. I have not had any failures due to the oiling sytem turing it 8800rpms. Although the oil pressure is NOT rock steady at 8800rpm. Aeration gets in the cavity of the oil pump and them the bubbles burst when trying to be compressed and cause the issue. I don't think you will have a problem at 8000 with an accusump. My complete oiling system holds 9 quarts with the moroso pan and very very large oil filter. I run a Wix nascar style filter, and it holds 2 quarts. The deep skirted design of the Ls-1 leads to most of the problem as all of the oil that drains back to the pan runs right across the spinning crank. Most high rpm small block chevys block all the drain backs except for the ones at the very rare of the block, that way there is minmal conact with the spinning crankl to whip the oil up. I would also suggest a vacuum pump if you don't have one all ready. 
05-28-2007, 03:34 PM
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Originally Posted by Six Speeds Inc.
The problem with the factory oilling system and block is aeration of the oil. I have not had any failures due to the oiling sytem turing it 8800rpms. Although the oil pressure is NOT rock steady at 8800rpm. Aeration gets in the cavity of the oil pump and them the bubbles burst when trying to be compressed and cause the issue. I don't think you will have a problem at 8000 with an accusump. My complete oiling system holds 9 quarts with the moroso pan and very very large oil filter. I run a Wix nascar style filter, and it holds 2 quarts. The deep skirted design of the Ls-1 leads to most of the problem as all of the oil that drains back to the pan runs right across the spinning crank. Most high rpm small block chevys block all the drain backs except for the ones at the very rare of the block, that way there is minmal conact with the spinning crankl to whip the oil up. I would also suggest a vacuum pump if you don't have one all ready.
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05-28-2007, 08:02 PM
#10
I was using Smith Brothers 7/16 restricted pushrods, but found out that a bad idea. I hear that the Jesel lifters restrict the oil to the top end a lot like 40 to 50 percent. They have a .090 hole for the oil to the top end. It is kinda hard to restrict a stock blocks as the lifer galley also oil the mains.
05-28-2007, 09:34 PM
#12
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Originally Posted by Six Speeds Inc.
On the driver side frame rail close to where the abs block once was. I used one of the sway bar bracket mount holes to mount it. You could put it on the outside of the frame rail also, up behind the headlight.
05-28-2007, 10:43 PM
#13
I use Royal Purple Racing 21. I think that it is XPR something now, but it was once Racing 21. I have had very good luck with Royal Purple oils. I have used there stuff in my car ever since I started racing with the cam only deal. And to answer Phils question I had some problems with broken adjusters that Jesel is claming is related to restricted pushrods. I don't entirely agree with them, however they have been doing this longer than I have. I don't understand what the difference in restricting the top end with the lifters vs the pushrods. (Restricted Jesel lifters vs Smith Bros pushrods)??????????
