hey guys. in an effort to fix a possible issue i have i wanted to start with a mechanical boost gauge. im not going to go into my issues to much as this is not the thread for it. but i am wondering if my AVC-R is not working fast enough VS a MBC ''soon to test and will have video'' but before i do that test i needed to know how ''laggy'' my electronic boost gauge was ''as i suspected it to be'' so i got an auto meter 30/45psi boost gauge and here is my test.

both gauges are pretty accurate but notice how much slower one is to the other. now i will also test this while actually driving the car as it will not be as bad do to the turbo not producing the sudden jolt of pressure. but if i can notice a lag on spoolup ''on the gauge'' im sure there still will be a difference. stay tuned

autometer mechanical VS STRI electronic.

http://www.youtube.com/watch?v=JXl7zjY1H9I

 

very interesting...Nice

 

Question is: can your turbo spool quicker than the gauge? You are hitting the gauges with an immediate shot of compressed air. The turbo wont spool that quick. Maybe the electric gauge will lag a tiny bit, but not like in your test.

 

read the rest of the first post. i stated that and what i will do.

 

interesting, awaiting results

 

Thank you for spanking me. I was just trying to re-inforce that the compressed air immediate shot has little real world value.

 

+1

 

How about a test on accuracy though? Ive never trusted a mech gauge down to even +- 2psi.

 

these to where accurate to the gauge on my compressor and to each other. thats good enough for me. lol

 

Another thing that I would be concerned with in a mechanical gauge: A turbo car will work the bourdon tube in the gauge very hard. High boost with high gauge readings, close throttle and immediate low swing to high vacuum. Mechanical gauges in any other application do not work as hard with the extreme and rapid movement of the bourdon. I believe that work hardening in the mechanical gauge will lead in a steady decrease in accuracy compared to how well it reads as new. The electric gauge should be more consistent over it's lifespan.

 

Did a test like this awhile back but never documented it. I think DarkEvoIX is correct on an electric gauge lasting longer because the mechanical gauge I tested first was new and later down the road it read 1-2 psi off. Look forward to seeing more results.

 

this is not a long term test. it is only to see how much laggyer the electronic gauge is over a manual. and also so i can watch boost when i do the ebc VS mbc test. but i agree with your long term thoughts

 

I see that now.. guess i didnt take my time reading your post. would love to see your results cause i may ditch my mbc soon.

 

How long is the vacuum hose for the mechanical boost gauge?

Is the air compressor right next to both gauges or are these gauges on your car and the compressor is meeting them under the hood?

 

NEAT and interesting