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10psi is where your BOV goes off keeping anymore air from going into the engine. 10 psi is about 70 percent more pressure than the ambient air pressure of 14.7 psi at sea level. It is the difference in air pressure that forces more air into the engine which creates more torque.
If you have 70 percent more going into the engine, you will make approximately 70 percent more torque. If you have a 14g and a t88 on a gsr running 3 psi you will be making the exact same horsepower (as long as the 14g is able to push the full 3 psi at the gsr's redline). Infact the GSR with the 14g would actually be faster because it causes less drag on the exhaust system, and is in boost for a larger portion of the rev range.
But if you were to put both of those turbos at 21 psi, the 14g would not have a chance in hell of pushing that, and the t88 would still be blowing air out of the BOV. So in that case the GSR with the t88 would be pushing 250 percent more torque, and the 14g be screwed.
Originally posted by kylemarhx@Mar 17 2003, 12:43 AM
hahahahaha, that's the most retarded thing i've ever herd. i'm sure you misinterpeted that from calesta, cuz i'm pretty sure he wouldn't say something that dumb. and the wastegate is what opens up at a set psi, not the bov. the bov is what opens the the throttle body closes to release the pressure in the charge pipes.
Originally posted by SnailOnARampage@Mar 17 2003, 02:56 AM
Here are dynos from 2 different 10 psi gsr's
Originally posted by pissedoffsol+Mar 17 2003, 01:01 AM-->SnailOnARampage
while THAT particular setup may only be a 70% gain, those numbers are VERY VERY weak. thats a typical drag turbo setup. AKA lame dick. t3/t4 on a pretty much unbuilt motor (at least it doesn't say) with low compression. compression has a LOT to do with power, esp. torque.
I will be running a t3/t61 on my 2L gsr/b16 head motor.
goal: 400 whp at 10 psi
once its in and tuned, i will post the dynos
Originally posted by SnailOnARampage@Mar 17 2003, 03:09 AM
However, like I said, an engine with a t88 reading 10 psi at the MAP sensor full throttle at a given rpm will make the exact same HP as the same engine running a 14g at full throttle reading 10 psi at the MAP sensor.
Originally posted by SnailOnARampage@Mar 17 2003, 03:29 AM
However 10psi of air at a given temperature at the map sensor on a given engine at given RPM at full throttle from a 14g and a t88 will make the same amount of horsepower.