Hey guys; a fully built stroker with 1mm oversized valves 272's and a GT3037s. On VP103 with alky/water mix, what would be a safe high boost on a flashed ECU?

 

With alky you wanna go approx 5 psi higher than you are running without

 

On pump gas yes,, not on Race gas or 100 Unleaded Ask Al or Mr Buschur before you raise your boost level

 

True True..

 

So then what does that work out to be ... 25psi on pump? or there abouts.
So if say your pump gas is 91 octane, would not 100 octane afford you the ability to run more boost? and then with the use of alky make you able to go even higher with the boost?
What am I missing here

 

bump

 

On 93oct and alky (100%) I run 26.5 for everyday driving. I would talk to Dave but my guess would be around 30psi would be safe.

 

Stock turbo is good for up too 28psi.. after that it gets dangerous...26 sounds about right.

 

your daily driver uses alky? i thought that stuff was for high abuse driving only? do you drive exceptionally hard everyday? (Disclaimer: if you are a full time pro race car driver please ignore this question as it will prolly annoy the crap outta you.)

 

It's not really that odd. There a lot of people that run alky as a supplemental fuel. It's not like the alcohol dragsters that use it as a primary fuel.

 

It just makes the turbo and car preform to its potential.. lower intake temp.. and lower burning temp.. .. the alc is only in there to prevent corrosion.. the water is what takes the heat out...

 

What?

The alky causes corrosion and dries out rubber and gaskets which is why you should use uplon fuel lube.

The water lowers the air temp and the alky further lowers the air temp through rapid evaporation. It also adds fuel allowing you to lean out the mixture and improve your ign timing.

 

I run ALKY on my daily driver so far soo good.

 

kuba23:how many vol % alcohol to water do you run in your alky mixture?

 

Now thats what I was thinking! As far as I know, and as was stated earlier, the use of alcohol / water injection will afford you the ability to run more timing and thus make more power:- if its a stand-alone ECU you would tune as such or if its a factory ECU the cumputor should sense the 'no knock' and then select the most advanced (timing) map.
And I believe that the reason that people use high octane leaded fuels such as C-16 is because of the anti-detonant properties of the lead which enables them to use a more aggressive timing curve and thusly make more power!
So, if you want to use an unleaded fuel, the highest octane of which is around 103-4, and you inject the alky mix, would you not be able to run more boost like say 30-32, provided your turbo can handle it?

Wadaya think Dave, Al , anyone else!