Vacuum Pump?
Thread Starter
Instructor
Joined: Mar 2013
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Vacuum Pump?
Hey guys,
Finishing up the engine build on my 95 LT1. It's a 383 Stroker with ported heads/valves, full exhaust, headers, bla, bla, bla. Should be upwards of at least 420 hp. Anyway, before the 383 rebuild, I had a ring go bad I believe, and was having serious vacuum/crankcase pressure issues. There weren't any vacuum leaks at that time. I believe the ring went because the engine already had 110,000 miles, and then I decided to do a cam/heads/exhaust job on it, and it just wasn't up to the task. So my question is......
At what point should one decide on getting a vacuum pump, and what are the options out there (electric vs belt-driven). Just curious what the future may hold.....
Finishing up the engine build on my 95 LT1. It's a 383 Stroker with ported heads/valves, full exhaust, headers, bla, bla, bla. Should be upwards of at least 420 hp. Anyway, before the 383 rebuild, I had a ring go bad I believe, and was having serious vacuum/crankcase pressure issues. There weren't any vacuum leaks at that time. I believe the ring went because the engine already had 110,000 miles, and then I decided to do a cam/heads/exhaust job on it, and it just wasn't up to the task. So my question is......
At what point should one decide on getting a vacuum pump, and what are the options out there (electric vs belt-driven). Just curious what the future may hold.....
Le Mans Master
Joined: Aug 2007
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From: WV
Le Mans Master
Joined: Feb 2005
Posts: 6,473
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From: Clearwater Florida
..... Very helpful info on the link ... useful for stock engines ........ performance cams have increased duration and overlap which will decrease the vacuum readings at idle ... a vacuum pump or reservoir is needed when the reduced vacuum at idle and low engine speeds starts to affect the performance of the brake booster and the braking action ..........
Thread Starter
Instructor
Joined: Mar 2013
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Safety Car
Joined: Apr 2005
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From: Dale City VA
I thought you were talking about a vacuum pump for the engine...
I don't think you will have any power brake issues with that cam. I run something similar in my 92 and have plenty of power brakes with the stock booster.
Will
I don't think you will have any power brake issues with that cam. I run something similar in my 92 and have plenty of power brakes with the stock booster.
Will
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From: Overland Park Kansas
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