The led lights for the boost gauge are being read off the pressure sent to the MAP sensor.
Which our cars came with a 2 bar map sensor, so it only registers boost up to 15 lbs of boost. So that's why the LEDs only go to 15lbs also.
I know when you swap to a 3 bar MAP sensor which range goes to 30psi. With this installed, the orange LEDs dont start lighting up until 7lbs of boost if I remember correctly. So really, at 22 lbs your LEDs would be maxed out on the gauge. If you did this then your 'new' range on the LEDs would be 7-22 lbs and not 1-30psi.
In all reality, if anyone did manufacture something like you describe, the cost to make it and how many will buy it at a reasonable price is not going to equal it self out.
There isnt many people who race their car or even own their cars who dont have an after market boost gauge. Sure there are people who own these cars that are 100% stock, but do those people who have them go WOT with them? More then likely they dont and dont care about performance or if the LEDs read up around 20+ psi. Then the people who do, they arent looking at that gauge for how much psi they run and I dont think many would pull their aftermarket gauge that's easy to read and run a stock one which would be hard to determine how much lbs your at when racing.
If you were wanting to discuss this issue with someone who would want it produced, you may want to contact John Spina at Caspers Electronics. He'd be the one to know what to do to make this product.
---Just my 2 cents :redface:
