At what point do you need a vac pump?
11-05-2009, 08:59 PM
#1
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At what point do you need a vac pump? I have a pretty wild carbed 383 ls1 and it has a small breather in one valve cover and a large one in the other plus a -08 vent hose coming off the valley cover to a catch can.
Now it catches about 3-4 oz in about 5-7 runs and the large breather has to be wrapped with a wrist band cause it will spit it every were.
Do I need a vacume pump?
Now it catches about 3-4 oz in about 5-7 runs and the large breather has to be wrapped with a wrist band cause it will spit it every were.
Do I need a vacume pump?
11-05-2009, 09:05 PM
#2
Just a race car....why bother.
If its street car too, it would be a good idea to evacuate the bad gases from the crankcase that build up over time. But then again...if you change your oil frequently, like every 3,000 miles....its not really necessary.
Kind of one of those things thats argued about all the time...whether or not you're gonna hurt your internals over time.
.
If its street car too, it would be a good idea to evacuate the bad gases from the crankcase that build up over time. But then again...if you change your oil frequently, like every 3,000 miles....its not really necessary.
Kind of one of those things thats argued about all the time...whether or not you're gonna hurt your internals over time.
.
11-06-2009, 09:22 AM
#4
Just a race car....why bother.
If its street car too, it would be a good idea to evacuate the bad gases from the crankcase that build up over time. But then again...if you change your oil frequently, like every 3,000 miles....its not really necessary.
Kind of one of those things thats argued about all the time...whether or not you're gonna hurt your internals over time.
.
If its street car too, it would be a good idea to evacuate the bad gases from the crankcase that build up over time. But then again...if you change your oil frequently, like every 3,000 miles....its not really necessary.
Kind of one of those things thats argued about all the time...whether or not you're gonna hurt your internals over time.
.
OP, you really need some type of crankcase EVAC setup on your car. Even if you just plumbed fitting into the collector, and ran hose from the breather in the valve cover to it would be better than nothing. Thats what I do on the 850+HP 565 in my sig. If I had the extra money and space on the car, I would put a vacuum pump on it without a doubt.
11-06-2009, 09:31 AM
#5
Plumbing each valve cover to a collector is what I did with a few race hemi super stock engines (13 to 1) that made 750 + HP ... it is a old school method but it sure works good an it will be the least expensive to do ... no matter what way you choose you need to evacuate the pressure that builds up inside your engine to produce the most power.
11-06-2009, 09:31 AM
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It depends on what you are using it for. If you are using it to seat rings you need it all the time. If you are just going to use it to evac the crankcase, just run it at the track because on the street it will suck way too much oil.
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11-06-2009, 05:06 PM
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I have a pretty wild carbed 383 ls1 and it has a small breather in one valve cover and a large one in the other plus a -08 vent hose coming off the valley cover to a catch can.
Now it catches about 3-4 oz in about 5-7 runs and the large breather has to be wrapped with a wrist band cause it will spit it every were.
Do I need a vacume pump?
Now it catches about 3-4 oz in about 5-7 runs and the large breather has to be wrapped with a wrist band cause it will spit it every were.
Do I need a vacume pump?
11-07-2009, 08:27 AM
#9
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I would run one. Just be sure to run a vacuum regulator in the valve cover so there wont be any damage due to having too much vacuum pulling the oil out of the cylinder walls. but a vac pump will help out the hp