I wouldnt even think about running without water or meth e85 or race gas at that boost level.

 

Initial plan was to keep it at safe 15psi, then thought about water inj. and finally said wth and decided to go with 50/50 water meth inj and up the boost because on stock motor with no ports 15psi will probably not come near those whp figures.

 

stick with water and you will be fine.

 

Not saying no one hasn't done it yet, but I have yet to see one higher than 15psi and it made like 404 I think. I too am curious to see what the GTX will do. I hope to see some one push it to 25+.

silverfdturbo6port- with regard to enzo, the time slips the car produced are very good... Its the Fastest 35r car i have seen on this fourm down the 1/4 mile no matter what the dyno said. In use is where it counts.

The dyno is just a tool to find the best power curve for tuning A/f and timming changes. Its obvious the #'s are easily Skewed as in this thread you have examples from 3 different countries that have "cooked the books" chasing number...

 

I will probably lose power with water inj. only. And if I use it pre-turbo it will be a touch laggier which defeats the purpose of me going with that turbo setup.

 

I agree.
those calculators usually only work with a perfect run.


before coming up with conclusions. do some research.
If you do it right you wont loose power. ANd if you do it right your not going to sacrifice spool. Not that spool is a issue with that ball bearing turbo. Ive always ran bigger JB turbos and never had issues with lag.

my .02cents
If your thinking that running 50/50 is going to make more power it wont. It will however allow you to run more agressive timing to try to make power but unless your running more meth content or 100% meth then your not going to make power from it. ANd if your going to push the car because you have the AI then your looking for trouble. The best way to use a AI is to tune without it and then add it after the tune like second insurance.

 

Thanks for all the advice. Like I said, my initial plan was water inj only as a reliability mod. However it's common belief here that our 97-98 octane fuel is not as good as US 93 octane fuel, hence the change of mind. I thought it wouldn't hurt to use 50/50 for both reliability and octane boosting functions.

Would I not go backwards if I added water or 50/50 and not tune for it? Also can you recommend nozzle sizes for my application?

I have no plans to push the car more than 18psi for the time being and 15psi for daily driving.

 

depends on the mix raito. Some places offer 50/50 pre mixed by weight and some mix by volume.
Id tune Then inject and just make sure your afr's are ok as thy might slightly change.

 

I remember that thread vividly. I read through it a few times before buying my turbo. Your trap numbers are definitely on point. I was looking at Howard's comment on the compressor map and I can see the ported shroud map flows around 10lbs more than the regular 35R. That's around 70whp more capable.... I can see it

Either way, all good stuff. I may look into that "ported shroud" bit though . Bolt right up? YES says I!!

 

^ If you look closely at the ported shroud map compared to the non port, a few things stick out...

-The ported shroud map is spun to 136,046 and the non ported is only spun to 116,891.

- Also, pay close attention to the efficiency %'slines. The Ported map graphs to 66% and the nonported only graphs to 70%, thought 68 and 65 are written, there are no lines to represent the #'s

It also seems the x,y(airflow, pressure) of the chart is different. On the non ported the squares are taller and the ported are more square.

If you take this into account the difference is very small. Does this seem right or am I reading it wrong?? Not 10lbs. more like 2 or 3...

 

95 hp, not 105..... FD rated at 255 flywheel

 

 

I went to Garrett's site, and the shrouded map they have is a little different than the one Howard posted. However, it is noticeably larger in flow just the same. It's funny, Garrett's site lists the two GT3582R turbo's as the same, but categorizes the ported shroud as 400-675hp instead of the regular 400-600hp. The trim, compressor and turbine are all the same. Only difference is the ported shroud. I plan to call Garrett Monday to get more info.

Even if it is 5lbs of air more, that is a simple bolt-on 40whp. Honestly, that should put me closer to my original projected numbers.

 

nice setup