Stock FAQs

how much boost on a stock car engine

by Mrs. Verdie Stroman DDS Published 2 years ago Updated 2 years ago
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If you have a stock engine, with a compressor that is factory set to produce no more than twenty pounds of boost, you shouldn't modify the system to make it produce much more than 25 pounds of boost. And increase of 5 pounds over stock is probably the limit you should go by.Oct 7, 2013

Full Answer

How much boost can you run on stock internals?

on a stock ls1/ls2. These boost numbers can be plenty safe so long as the car has the proper tune. that PSI *can* be safe detonation wise (with a really good tune!)...but common evidence suggests that 500-550rwhp is about the limit of stock internals, mainly the pistons and con rods begin to start dying over 550rwhp.

Is 10 pounds of boost alot?

The reason so many folks cite 7-8 Lbs as a maximum safe boost level is because of the amount of effort, expertise, and $$ it takes to go beyond that. Most of the bolt-on FI kits that ship with a "canned" tune and questionable fueling are going to play it safe and keep things at a lower overall boost level.

How much turbo boost is normal?

There's a wide variation, but back in the '90's it was clustered in the 10-12psi range for a typical 4-cyl turbocharged performance model. Nowadays 16-18psi is not abnormal for high performance factory cars.

How much boost is my car running?

2:5811:06How to Measure How Much Boost You Are Running Using HP TunersYouTubeStart of suggested clipEnd of suggested clipSo essentially let's say we're running sixteen. Point seven psi. So what that means is that'sMoreSo essentially let's say we're running sixteen. Point seven psi. So what that means is that's actually 2 psi of boost. So 2 psi of boost.

How much horsepower does 6 pounds boost add?

Typically you will get about 8hp per lb of boost you are running. Our car could probably take 6psi without doing anything... which is about the limit you'd want to run without an intercooler.

What does 15 PSI boost mean?

15psi refers to sea-level atmospheric pressure. Increasing the power requires increasing the volume of air-fuel mix in the cylinder in the same time, i.e. increasing the velocity.

Is 20 pounds of boost a lot?

Most turbochargers stop producing boost after 20 to 25 pounds have been reached, although they are capable of much more. Superchargers, also capable of greater boost numbers, typically build up to a maximum of thirty pounds of boost.

At what RPM is turbo activated?

While your car's engine revs, at cruise, at around 2,000 rpm, a turbo's turbine can reach rotational speeds of more than 280,000 rpm.

How do you adjust the boost on a stock turbo?

1:097:38Adjust Your Boost Pressure - YouTubeYouTubeStart of suggested clipEnd of suggested clipBasically if you turn it one turn clockwise which is tightening that's about 1 pound of boost. AndMoreBasically if you turn it one turn clockwise which is tightening that's about 1 pound of boost. And if you back it off one turn that's your back you're lowering the boost 1 pound.

Do Turbos lose power over time?

Over time this pressure can cause leaks and cracks, making the turbo work harder and increasing levels of fatigue. This can damage and wear out the turbo. Age and wear and tear – as you would expect, a turbo will not last forever.

Why does a turbo only boost under load?

The only reason there is lower boost is due to the lack of enough air mass to put the turbo into efficiency range and cause it to pressurize the intake. Rolling downhill, the throttle plate is closed, forcing vacuum, no mass=no boost.

What can too much boost do to your engine?

Increasing boost (within reason) will force more air into the engine, so more fuel can be added to increase the power. So in general, if you add more boost and have an engine tuned to suit will give you more power. Too much boost can cause turbo or engine failure.

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