Mas psi on 94 octane

[violentpumpkin]

What factors determine the max psi on 94 octane without running into detonaton?

Is there a formula?

Can a tuning shop determine this on a car to car basis?

I have a 4'' front mount intercooler. This should allow me to run at a higher boost, correct???

Does a company make a good enough knock sensor that can save a motor?

I have 16g's (small) attached to headers. ***I am running the same compression as a 911 turbo 9:1*** What psi sounds reasonable?... Without running 110 octane?

Thanks, James

[one day...]

dont forget fuel delivery.... it have also is limit (what ever setup you have)
is "bad" knock sensor really exist? ( I mean, a worked one)

[surreal]

What factors determine the max psi on 94 octane without running into detonaton?

Is there a formula?

Can a tuning shop determine this on a car to car basis?

I have a 4'' front mount intercooler. This should allow me to run at a higher boost, correct???

Does a company make a good enough knock sensor that can save a motor?

I have 16g's (small) attached to headers. ***I am running the same compression as a 911 turbo 9:1*** What psi sounds reasonable?... Without running 110 octane?

Thanks, James

there is no special formula that im aware of ... itll depend on many factors like your specific mods and how the car is tuned. for example you could always yank a bunch of timing and crank the boost ... but you may end up with less power anyway. whoever is tuning your car will have to figure that out.

its been discussed in other threads that x psi on one setup can be different on another setup.

the car should come with a knock sensor that works fairly well ... if youre running a standalone like aem ems you can add a sensor tho. it basically just listens to your engine however... so its up to you to determine whats knock and whats actually harmful.

btw what happened to your 368s?

[violentpumpkin]

Wasn't to sure if everyone knew what the gt368's were. Everyone seems to describe their turbo's buy the compressor wheel size. The gt368's have a 16g. So I called it a small 16g. I got the info on my turbo from www.stealth316.com/2-turboguide.htm I'm not sure, is there a difference between my turbo and a small 16g? Or is it just a name brand? Thanks for any info.

[violentpumpkin]

According to the chart numbers my 368's should flow (practical flow) as much or almost as much as the smaller td05's without as much turbo lag. Will the air entering my motor be close to the same temperature as a tdo5?? If it is, why would one upgrade to a tdo5? Or do people only use the really large tdo5's? My car is apart right now because of the snow and I want to upgrade it as much as possible. Has anyone else built a motor with 9:1 compression like mine??

[surreal]

yeah 368s seem to be fairly rare. i always thought that they used a 60 trim (edit: yup, link posted says t3 60 trim) wheel or something like that (maybe im thinking of phantoms?). either way, fairly sure they all use a garrett comp cover + wheel. these are probably the largest td04 turbos i can think of.

dont forget that there are 2 halves to a turbo... the compressor is pushing air in, but the air still needs to get out; the turbine housing is basically a part of your exhaust. most of the appeal of going to a larger turbine housing is to allow greater exhaust flow (just like upgrading to larger diameter exhaust piping).

the downside is that a higher flowing turbine housing will generally mean more 'lag'. kind of a trade off. some people claim that largerly mis-matched turbos have a tendancy to surge as well i guess.

anyway, hopefully that semi-answered some of your questions :p

as for your 9:1 cr, youre kinda in between a stock tt and an na-tt conversion lol. dunno if anyone on here is running 9:1, but i know there are several 9:1 engines out there. with the higher compresssion you wont be able to run as much boost (its just a # tho) but you should make more power at lesser boost levels i guess.