64whiteghost
Well-Known Member
Whatsup guys. What oil pump do you recommend for my 450hp 340 build ? Its going into a 1964 plymouth valiant
No idea what all that means
I run melling HV pumps but I also do anything else that can increase flow. From full grove bearings to smoothing out all casting in the block to glyptal in the block
Wow. I see they have them bad boys back in stock. With an inflated price, too!DODGE Melling M-72HV Melling High-Volume Oil Pumps | Summit Racing
Free Shipping - Melling High-Volume Oil Pumps with qualifying orders of $109. Shop Oil Pumps at Summit Racing.www.summitracing.com
yeah, it seems like the sealed power and the mahle jumped up too. the melling was out of stock for so long, the last two i wound up using a MP one and a summit house brand. wasn't super concerned on the MP piece, but the summit one got the hairy eyeball before going in.Wow. I see they have them bad boys back in stock. With an inflated price, too!
I have a collection of used slant 6 pumps and a couple or three new ones. They're ridiculous new, too.yeah, it seems like the sealed power and the mahle jumped up too. the melling was out of stock for so long, the last two i wound up using a MP one and a summit house brand. wasn't super concerned on the MP piece, but the summit one got the hairy eyeball before going in.
Agree, don’t give up on perceived HP. Concentrate on all of the above. You really don’t know what the actual hp until you get it on an engine dyno. Even the it depend a lot of fine tuning.Honestly a stock pump is fine. It depends on a few factors not HP.
1) clearances- how loose is the motor? The looser it is, the more oil you need to fill those gaps.
2)rpm- are you dropping oil pressure the faster it spins. Most pumps “blow off” excess oil pressure out the by pass valve.
3)cost- as mentioned above, these prices are going higher and higher as child labor in Chy-na and delivery fees are increasing.
4) added power boosters like turbos need oil and that to me is where you need “extra” oil flow to compensate for the loss of oil flow/pressure.
Syleng1
Your number 2 is incorrect the excess oil pressure does not blow out the pressure relief valve. The valve opens inside the pump in order to drop the pressure. Once the pressure drops the valve closes and the pressure increases until the next time it needs to open up to allow the pressure to drop.Honestly a stock pump is fine. It depends on a few factors not HP.
1) clearances- how loose is the motor? The looser it is, the more oil you need to fill those gaps.
2)rpm- are you dropping oil pressure the faster it spins. Most pumps “blow off” excess oil pressure out the by pass valve.
3)cost- as mentioned above, these prices are going higher and higher as child labor in Chy-na and delivery fees are increasing.
4) added power boosters like turbos need oil and that to me is where you need “extra” oil flow to compensate for the loss of oil flow/pressure.
Syleng1
The SealedPower NAPA ONES I got had a paper and same casting as Melling and had a Melling paper inside box. M-72 as well as HV 72 onesI believe there are only 1 or 2 places the manufacture and cast these SB pumps.
if i had to take a guess melling would be one and seeing sealed power as another option that would be my second guess in that they're part of federal mogul. mahle probably buys it from one of them and just reboxes it.I believe there are only 1 or 2 places the manufacture and cast these SB pumps.
i stand corrected, then. thanks for the insight!The SealedPower NAPA ONES I got had a paper and same casting as Melling and had a Melling paper inside box. M-72 as well as HV 72 ones
Did they step up to fix? They have been really good for me so far.I've used Precision Oil pumps for years. I did have a poor experience with them on the newest SBM motor I built.
When I hand tightened the oil pickup into the pump, 1/2 of the threads snapped off the housing. I never even put a wrench to it. After examining it under my magnifying light, it appears to have been a casting defect.
I called Precision and they claimed it was installation error, which really irked me because the threads were cleaned and prepped before screwing the pickup tube on.
Just make sure that before any oil pump is installed to inspect for hairline fractures and defects. Trust but verify.
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No sir they did not. Never gave a refund. $170.00 down the drain. I ended up just reusing the old stock HV Melling. Works fine.Did they step up to fix? They have been really good for me so far.