Search Advanced search…. New posts. Search forums. Log in. Install the app. For a better experience, please enable JavaScript in your browser before proceeding. You are using an out of date browser. It may not display this or other websites correctly. You should upgrade or use an alternative browser. What does your boost gauge read on idle? Think i got a leak Hi guys, in regards to my last topic i thought i'd do another for this and it maybe useful for others to know.
I'm on a stage 1 map and on idle my liquid gauge on boost gauge shows Apparently this figure should be on or near that? Can somebody please tell me as i've heard this indicates i have a boost leak?
Lee GT I think mine sits around -1 bar which is about the same as yours. Lee said:. I heard that aswell but i have been done lots of boost checks on my system and can never find any leaks.
DaveA3 Audi A-Trizzle! Sandip Registered User. Mines sits at on idle and around if i take my foot off the pedal whilst driving. What's peak boost like?? DJ, via pm to me and in post 1 I'm on a stage 1 map and on idle my liquid gauge on boost gauge shows Mine sits on had a Boost leak on one of my intercooler pipes wich made it sit at about fixed and now bang on My stack gauge shows 0.
Its all about the flow Staff member. Turning aircon on and off will affect vacuum at idle raises a little when on and the reason it reads higher when you let off the throttle on the move is due to the throttle flap closing completely creating a higher vacuum It's on 1 of the ancillary hoses off the charge pipe, it's the one which goes to the dv. There's a slit in the pipe where the jubilee clip is, it looks like the clip has cut a slit into it.
These gauges, on the other hand, are used for diesel-driven cars or full-blown race cars that spend life on a quarter-mile at a time.
These gauges run higher boost pressures due to diesel applications. So, why should you even be using a boost gauge in the first place? Turbocharged engines have become the talk of the town among car enthusiasts. Moreover, they have benefits that can increase the power of your car even if it has a small engine package. These engines produce a big amount of compressed air due to the engine burning during combustion. To put it more simply, a turbocharger uses the exhaust air, which usually goes to waste, to give your car an acceleration boost.
This is where you learn to read a boost gauge. Now, before getting into it. Take your Turbocharged vehicle to a place that has a dynamometer for testing. A boost gauge can read different boost pressures while operating. But what you really need here, is to test it in different situations to understand the difference between boost and power gains. The readings need to be marked on your paper.
Prep the car for a warm-up. Drive the car up to operating temperature after driving for a time of 15 minutes. Now, bring the car to a complete halt. Mark the boost pressure at that location. This is the boost pressure your turbo will need to start working.
Now, in a neutral position, press the gas enough to produce a high rev of to RPM. Now, check the RPM and check how long it takes the turbo to produce a positive boost. Note that down. This is the RPM that you will need to make your turbo push air. So, now that we have got the base marks, what do we do next? Drive around in different situations taking your car to the limit of normal operations. Keep an eye on the boost gauge and check the readings. These readings indicate how your engine would perform in different environments.
Find the highest boost reading after driving for an extended period which will signal that the engine temperature is way too high for safe operation. Mark the high and low points that you found on your boost gauge with a permanent marker to keep track. Make sure the ink is opaque so that you can read the illuminated light at night. At idle, a boost gauge should read close to zero depending on the air temp. Boost pressure can be read on the boost gauge in PSI by following the needle.
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