#Bluex build thread gmt400 professional#

I was rolling 75 mph with nothing in front of me on a 3 lane road one day, car entering the flow of traffic moved over into the center lane without looking to see what was beside him and was pit manuvered by the pickup truck in the center lane ahead of me that I was about to pass. Unless you add a larger diameter or multiple diaghram/chamber booster or a hydroboost for the 1.25' master you will not develop as much braking force.Īs I have stated in multiple threads on this, a true emergency panic stop will make you trash the NBS master with quickness. Properly functioning OBS master cylinder does have a spongy feel to it but for a given input pressure on the input pin will develop the highest pressure therefore give the strongest clamping force on the caliper and the strongest push on the wheel cylinders. The NBS master is either 1.25' or 1.34' Means that the highest peak hydraulic pressure will come from the smaller OBS master. Only exception I know of is the Police/Limited Tahoe with the larger front caliper pistons and it is 1.25'. The OBS master for vacuum boost in most applications has a 1.13' bore. There is always someone with marginal knowledge that wants to argue about stuff they don't understand.

Stuff like this is why most guys keep quiet and never offer advice. You seem like you have a good general knowledge but for God's sake cut out the loud mouth look at how smart I am stuff and calling people names because they don't capitulate to your opinion.

#Bluex build thread gmt400 professional#

I'm factory trained by both GM and Ford and with 30+ years as a professional mechanic, and more than that tinkering with hot rods and such. We were taught almost all theory as opposed the model specific stuff taught now. GM has used low drag caliper a lot longer then this abortion of a master cylinder, there is no magic in it.ģ4+ years ago when I was in school for this stuff we were taught to understand the theory of what we were fixing so we could logically find the fault when it arose. Likely there is an increase in needed pedal pressure because the size change but it appears most folks are OK with that given the number of them that make the switch. The large bore of the NBS master cylinder is able to fill the caliper chamber quickly and push the piston out just fine. The constant bulling from you on this subject is getting boring and I'm tired of it enough to respond. You certainly don't understand the 'step bore' because you continually describe it's function incorrectly. The problem here is you don't understand the hydraulics as well as you think you do.