high flow oil pump
- Thread starter dave 1970
- Start date
A high volume, not high pressure , pump is designed to flow more oil at the same given r.p.m. This is useful in racing situations where the bearing clearance are set to a looser tolerance. For a street engine, (or even alot of dual purpose emgines), the clearance are set tighter; so a high volume serves no purpose other than to damage the oil filter or press-in oil plugs.
A word of caution on stock pumps though; they are net checked very well for tolerances and you can get a crappy one. A blueprinted stock pump is a good idea. Someone will chime in and say that they've used hundreds of stock pumps with no problem, but it only take one out-of-whack pump to destroy an engine that cost you thousands of dollars to build, so it should be considered.
A word of caution on stock pumps though; they are net checked very well for tolerances and you can get a crappy one. A blueprinted stock pump is a good idea. Someone will chime in and say that they've used hundreds of stock pumps with no problem, but it only take one out-of-whack pump to destroy an engine that cost you thousands of dollars to build, so it should be considered.
ratio411
Founding Member
High volume pump is for loose bearings.
The extra stress on a street engine is focused on the oil drive shaft, cam gear, and distributor shaft.
Not a good thing for a streeter.
Believe it or not, the HV pump also has a high parasitic HP loss.
Dave
The extra stress on a street engine is focused on the oil drive shaft, cam gear, and distributor shaft.
Not a good thing for a streeter.
Believe it or not, the HV pump also has a high parasitic HP loss.
Dave
fvike
Member
Dammit, I just ordered a HV pump from Summit. Should I send it back for a Standard volume pump? I lost a cam lobe last year, and the oil pump is the only part in the engine not protected by the filter right? So I thought I'd just get a HV pump while I was at it. Bad idea? I still have my old SV pump.
This is the pump I ordered:
http://store.summitracing.com/partdetail.asp?autofilter=1&part=SLP%2D224%2D41143V&N=700+0&autoview=sku
This is the pump I ordered:
http://store.summitracing.com/partdetail.asp?autofilter=1&part=SLP%2D224%2D41143V&N=700+0&autoview=sku
http://data.melling.com/Tech pdfs/HIGHVOLUMEPUMPS.pdf
The hv pumps only flow 20-25% more than a standard pump. The difference in hp loss is like going from 10-30w to 20-50w oil, maybe a few hp. I have one in my engine and my bearing clearances were within range. My gauge goes about 3/4 when cold then to the half mark warm and idling. I don't like the huge main bearings in a 351w plus rpms is the reason why is stuck it in there. I also have a 8 quart pan.
The hv pumps only flow 20-25% more than a standard pump. The difference in hp loss is like going from 10-30w to 20-50w oil, maybe a few hp. I have one in my engine and my bearing clearances were within range. My gauge goes about 3/4 when cold then to the half mark warm and idling. I don't like the huge main bearings in a 351w plus rpms is the reason why is stuck it in there. I also have a 8 quart pan.
ratio411
Founding Member
Don't send it back...
It's not that big a deal.
I have one in my very mild 302.
Would I take it out or lose sleep?
No.
If I swap it again, will I use HV?
Probably not, but it's not a big deal.
It's not often that these negatives actually rear their heads.
Dave
thankyou all for the input,i ordered a heavy duty pump shaft from for ,i will stay with the stock pump,thanks again
fvike
Member
oil pump reply
hello ,right now i am running casteroil syntec 10w-30 i also relocated the oil filter in the grill with an oil cooler,seems to work fine,the motor im building to put in i also cut out the bottom pan to make room for more oil,going to cut the pan off of a duetz diesel and weld it on the bottom of a stock front sump pan
hello ,right now i am running casteroil syntec 10w-30 i also relocated the oil filter in the grill with an oil cooler,seems to work fine,the motor im building to put in i also cut out the bottom pan to make room for more oil,going to cut the pan off of a duetz diesel and weld it on the bottom of a stock front sump pan
