Boost Gauge installed...Reading Accurate?

Post by **240dreams** » Thu Jun 17, 2004 5:52 am

I just installed my Greddy Boost gauge and was wondering if im getting good reading. Here they are:

idle-500mmhg1st gear-.6 bar2nd gear-.6 bar3rd gear- .6 with a spike to .7 bar

are they about right? im at stock boost.

Post by **Chingon** » Thu Jun 17, 2004 5:52 am

hmm....I don't know how much 500mm hg translates to, but in idle, I think it should read 0 or extremely close to 0

Post by **240dreams** » Thu Jun 17, 2004 5:52 am

its way at the bottom

Post by **Tai Mai Shu** » Thu Jun 17, 2004 5:52 am

What? No at idle you should read near the bottom 20in/hg in standard. If it reads close to 0 then you have a massive air leak. So you are good. .6 is a little more than half a bar. uumm one bar is 14.7 divide that in half and you have 7.35psi. Which is where the stock acuator opens. So you are good to go!

P.S. Greddy gauges are almost never inacurate thats why you pay the extra $$$

Post by **240dreams** » Thu Jun 17, 2004 5:52 am

hell yeah, my greddy gauge is quality made. its seems very accurate and responsice. it also looks just like the stock cluster. thanks for the info

Post by **240dreams** » Thu Jun 17, 2004 5:52 am

im kinda worried. my gauge reads a constant .7 bar in 3rd gear pulls is this normal for the stock turbo and stock boost. im on my stock fuel pump but i just ordered a walbro.

Post by **BuudWeizErr** » Thu Jun 17, 2004 5:52 am

Chingon wrote:hmm....I don't know how much 500mm hg translates to, but in idle, I think it should read 0 or extremely close to 0

wtf crack are you smoking?

240dreams wrote:im kinda worried. my gauge reads a constant .7 bar in 3rd gear pulls is this normal for the stock turbo and stock boost. im on my stock fuel pump but i just ordered a walbro.

Do you have an S14 motor? Or S14 turbo/actuator combo?

I've never heard of it spiking like that on the stock turbo/actuator unless there is a problem with the vaccum line or something. However, my friend has an S14 motor and after removing the boost solenoid, like most people do, it runs up to about .7bar without a boost controller at all. Even more when it's cold out.

Post by **Chingon** » Thu Jun 17, 2004 5:52 am

the good kind...

oh well i guess I thought wrong then..

Post by **240dreams** » Thu Jun 17, 2004 5:52 am

i have a s13 black top and its humid as hell out. does this mean i have a vaccum leak? its sits a 500mmhg during idle very steadily.

Post by **nnkfws333** » Thu Jun 17, 2004 5:52 am

I too have a Greddy Boost Gauge and the 500 mmHg is a correct number for idle but you should be reading .5 bar all the way through. When I take off my boost controller it always goes to .5 bar never higher or less. Like everyone else is saying do you have an actuator in there?

Post by **240dreams** » Thu Jun 17, 2004 5:52 am

i belive its the stock actuator. It looks stock atleast - no brands or emblems. Is this a good or bad thing? I guess its good b/c its makin me faster but I dont want it to lead to problems.

Post by **Tai Mai Shu** » Thu Jun 17, 2004 5:52 am

As long as your not heatsoaking your sidemount IC. Otherwise I wouldnt worry about it, just put the walbro in!

Post by **240dreams** » Thu Jun 17, 2004 5:52 am

damn, i just did a fourth gear pull and boost was almost steady at .8 bar and falling to .7. THIS IS ON A STOCK SETUP. wtf.

Checkered-Member · Post by **Checkered-Member** » Thu Jun 17, 2004 5:52 am

240dreams wrote:im at stock boost.

wow, hardly do I see “boost” on a 240.... stock

Post by **240dreams** » Thu Jun 17, 2004 5:52 am

im in the "process"

Post by **GripR** » Thu Jul 07, 2005 5:20 am

sorry to bring this thread back from the dead but i didn't want to start a new one...

ummm... my question is, when my car is in neutral i rev it up to redline a few times and my boost gauge reads from 500 whatever to 0 is this suppose to happen? i can hear my bov and turbo spooling so that must mean i'm creating boost in neutral but how come it only reads up to 0? but when i'm in gear it reads fine?

Post by **kamikazestorm420** » Thu Jul 07, 2005 7:14 am

you do not create boost in neutral

Post by **Morph** » Thu Jul 07, 2005 8:08 am

kamikazestorm420 wrote:you do not create boost in neutral

We have a winner!!!!!!!!

Post by **PantherRacer** » Thu Jul 07, 2005 11:23 am

you don't create boost in neutral...ok, I learnt something today. So that means I can still blow my engine in neutral but my turbo won't boost it's death. (No I'm not gonna test that theory.)

So, you press gas. Your revs are goin up, the turbo is spooling, air is moving through the turbo system, WHY, isn't it creating boost pray tell? Does the turbo system say, whoops, in neutral, no boost, or is it the wastegate, or how about you just explain it to me?

Yinno, you have to ask questions to learn.

Post by **WeldingHank** » Thu Jul 07, 2005 11:37 am

when you sitting with no load on the engine, the engine can easily take the extra airflow created by the turbo. when your driving, the engine is under load, and has a harder time with the extra pressure and allows the intake tract to pressurize with the air it can't take in.

Post by **Florida240sx** » Thu Jul 07, 2005 12:49 pm

I thought it creates boost but like you said about load not enough to do anything unless under it....

Post by **GEO** » Thu Jul 07, 2005 1:45 pm

yep. No load, no boost. PLain and simple.

Post by **Jookmasta** » Thu Jul 07, 2005 9:20 pm

Post by **GripR** » Fri Jul 08, 2005 5:07 am

thanks guys! i was freaking out that something was wrong with my snail or bg.

Boost Gauge installed...Reading Accurate?

Boost Gauge installed...Reading Accurate?

Re: Boost Gauge installed...Reading Accurate?

Re: (kamikazestorm420)

Re: (Morph)

Re: (PantherRacer)

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