LT1-LT4 Modifications 1993-97 Gen II Small Block V8

High Pressure Oil Pump

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Old Sep 9, 2013 | 12:05 PM
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From: Jackstandican
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Stock. Had to cut and bend it a bit to get it to fit over 4-bolt mains. The readings are not accurate, however. I know when the oil level is at the "Add" part of the dipstick that it is full.
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Old Sep 9, 2013 | 12:12 PM
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Originally Posted by SS RRR
Stock. Had to cut and bend it a bit to get it to fit over 4-bolt mains. The readings are not accurate, however. I know when the oil level is at the "Add" part of the dipstick that it is full.
Eh, I just dump a gallon and the leftovers from truck oil in and call it a day.
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Old Sep 9, 2013 | 04:12 PM
  #23  
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Originally Posted by shbox
Melling 10554 with their pink spring or the GM white spring (same 70# spring).
Thanks just got off the phone with Lashway Motorsports and they recommended this same pump for my build.

Originally Posted by SS RRR
Completely not necessary if you are running stock bearing clearances on your engine. Higher pressure does not mean better lubrication.
http://www.camaroz28.com/forums/adva...5/#post4458190
Very true. I should have clarified though. Bearing clearances will be a couple thousands looser. Flow will be mandatory for my bearing clearances as well as pressure. Considering too much pressure inhibits oil flow. Oil ill be running is 20W-40 SynPower. Considering it gets pretty hot here in southern florida. Nothing too loose though to the point of spun bearings after every season. Our balancing, clearances, tune, lubrication have to be spot on for the motor to live. My goal for the oiling system is a high flow, high pressure. RPM’s will be stressing the stock bottom end, especially with the SR cam im running. I wont be max efforting (for the lack of a better word) this cam for now. The stock pistons + PCM will limit my choice to 7000rpm with a few degrees of timing pulled. Its more of a test/warmup build (Sounds like a waste) until im ready to throw in some Mahle PowerPack pistons. Then with the same cam 7500 will allow the cam to breath to its potential.

Appreciate the link. Very good information.


Originally Posted by leadfoot4
The higher the oil pressure, especially if you're running stock bearing clearances, the more strain on the pump, the bypass spring, the drive gear on the distributor, and the oil filter case.

IMHO, if you're running auto-x, you need an oil pan that will control the oil from sloshing, more than you need a high pressure pump.
Ill be running a Moroso 20185 pan with a Fluidyne all season 58mm shrouded DB30613. Like I said earlier Dry-sump will be a logical move, but for my mild goals for now a wet sump should be fine until the second phase of the motor build is ready.
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Old Sep 9, 2013 | 05:26 PM
  #24  
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Originally Posted by 83MonteLT
..... Like I said earlier Dry-sump will be a logical move, but for my mild goals for now a wet sump should be fine until the second phase of the motor build is ready.
I would tend to agree, however, the dry sump pump on a SBC usually mounts to the engine right about where the steering rack and column connect on a 4th gen Camaro/Firebird....
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Old Sep 9, 2013 | 07:05 PM
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Originally Posted by 83MonteLT
Thanks just got off the phone with Lashway Motorsports and they recommended this same pump for my build.



Very true. I should have clarified though. Bearing clearances will be a couple thousands looser. Flow will be mandatory for my bearing clearances as well as pressure. Considering too much pressure inhibits oil flow. Oil ill be running is 20W-40 SynPower. Considering it gets pretty hot here in southern florida. Nothing too loose though to the point of spun bearings after every season. Our balancing, clearances, tune, lubrication have to be spot on for the motor to live. My goal for the oiling system is a high flow, high pressure. RPM’s will be stressing the stock bottom end, especially with the SR cam im running. I wont be max efforting (for the lack of a better word) this cam for now. The stock pistons + PCM will limit my choice to 7000rpm with a few degrees of timing pulled. Its more of a test/warmup build (Sounds like a waste) until im ready to throw in some Mahle PowerPack pistons. Then with the same cam 7500 will allow the cam to breath to its potential.

Appreciate the link. Very good information.




Ill be running a Moroso 20185 pan with a Fluidyne all season 58mm shrouded DB30613. Like I said earlier Dry-sump will be a logical move, but for my mild goals for now a wet sump should be fine until the second phase of the motor build is ready.
If you add "a couple of thousandths" bearing clearances you will be screwing up. That is too much. Don't to that. No more than .0025" for the rods. No more than .003" for the mains. The fast guys don't run stock diameter rod or main journals.
Smaller journals use less oil clearance.
You likely won't need to add more than .001" oil clearance.
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Old Sep 10, 2013 | 06:12 PM
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Originally Posted by Ed Wright
But they don't do it very well. I didn't find much I liked about my Canton. Not very good for drag racing. Had two pin holes in welds that seeped oil. The Moroso I have now is much better. They would be a better road race pan.
I had to clearance some of the rails for the filter area, I got lucky and didn't have any pin holes. Some of the allen head bolts holding the screen in were loose too. Not the worst pan I've ever seen but not worth the money. The Stef's has a billet front and back so it was really easy to seal up. Has to be drilled for the dipstick, but I never use one now.
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Old Sep 10, 2013 | 06:20 PM
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I've never had a Stef's, but the ones I have seen look very nice. Friends that have them love them.
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Old Sep 10, 2013 | 09:42 PM
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Originally Posted by Ed Wright
I've never had a Stef's, but the ones I have seen look very nice. Friends that have them love them.
The worst part about it was the wait time and the price.
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Old Sep 11, 2013 | 07:33 AM
  #29  
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The wait is the reason I don't have one. Screwed around too long to order. Had to settle for a off the shelf Moroso. It's steel. Not as slick as a Stef's, but is built like I think it should be, fits great and no leaks welds. Dave's Reher had some input on the design, so I think it is fine. I pretty much think David hung the moon as far as race engines go. I've known him since Bobby Cross was driving their Maverick before he & Buddy opened their business.
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Old Sep 11, 2013 | 09:31 AM
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From: Jackstandican
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Originally Posted by fex77k
Some of the allen head bolts holding the screen in were loose too.
Dude c'mon. You should always nut and bolt anything you receive before putting it onto an engine.
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Old Sep 11, 2013 | 11:38 AM
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Originally Posted by Ed Wright
The wait is the reason I don't have one. Screwed around too long to order. Had to settle for a off the shelf Moroso. It's steel. Not as slick as a Stef's, but is built like I think it should be, fits great and no leaks welds. Dave's Reher had some input on the design, so I think it is fine. I pretty much think David hung the moon as far as race engines go. I've known him since Bobby Cross was driving their Maverick before he & Buddy opened their business.
They said 3-4 weeks it was more like 7. As far as RM goes, they will build you a winning motor for the right price.

Originally Posted by SS RRR
Dude c'mon. You should always nut and bolt anything you receive before putting it onto an engine.
Stef's was fine from the factory the Canton was not.

How do you think I knew the were loose, I checked it.
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Old Sep 11, 2013 | 12:30 PM
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Yeah, but I still think that really shouldn't be held against them or any manufacturer that uses threaded-type fasteners on their product.
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Old Sep 11, 2013 | 01:17 PM
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Originally Posted by SS RRR
Yeah, but I still think that really shouldn't be held against them or any manufacturer that uses threaded-type fasteners on their product.
Maybe you run 12s cause you have a canton pan?!?!
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Old Sep 11, 2013 | 01:34 PM
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that darned parasitic drag teh canton produces...
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Old Sep 11, 2013 | 07:47 PM
  #35  
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Originally Posted by Ed Wright
If you add "a couple of thousandths" bearing clearances you will be screwing up. That is too much. Don't to that. No more than .0025" for the rods. No more than .003" for the mains. The fast guys don't run stock diameter rod or main journals.
Smaller journals use less oil clearance.
You likely won't need to add more than .001" oil clearance.
I wont be doing the machine work. Thats all up to Laz @ Mesa Balancing. The main bearings im running are Clevites 77’s coated by Polydyn. Our oil clearances will be no more than .001. IIRC Rod Journal sizes are 2.10, and mains are 2.45 for the Gen 2 blocks. Laz is a good SBC builder with 27 years under his belt. Known him for 7 years, so im not too worried about him Fu**ing up. What is everyone's bearing clearances for your strip cars?
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