Ok, so I will order my single set-up next week. What it'll be depends mostly on what I get good maps for. As I have no possibility to tune my PFC here I have to search/buy. Or can I run base maps? The Turbo will be a T88 or T78, maybe GT35/40. Has anyone those Turbos running a non-ported engine and PFC? What injector sizes do I need? I'm not planning to make more than 15PSI and I don't want an extra fuel rail.

Thanks

My freind runs a T78 on a stock ported motor. He is running 750pri and 1680 sec injectors with an SX FPR and the PFC.



I am still waiting on my GT35/40 to show up and I am running the same injectors as him with an Aermotive A1000 FP, -10 Feed and -8 return with an SX FPR and the PFC.



The T88 is too big for 15psi max....I would stick with either the T78 or the GT35/40 for that boost level. I will be running low boost at 17psi on pump gas and high boost at 22-24psi with 110 octane fuel.



Is your motor stock? or just stock ported?

the motor is compl. stock. won't do the porting job before it blows. I was thinking to use 1300 primaries and sec. They are easy to control aren't they? want to keep everything easy. I am using 99oct. gas all day long.

1300 primaries? https://www.nopistons.com/forums/pub...DIR#>/ohmy.png I have never heard of anyone doing that before, especially not for 15psi, that is overkill if it is possible. For 15psi, you would be fine with either a 550/1600 setup or a 850/1300 setup, maybe even a 550/1300 possibly. In Germany, is the octane rating the same as the US? I know in Japan that there 93 Octane is not the same as our 93 Octane.

Why do you want such a big turbo for only 15psi? Go with a T04s or something. You can still make 400 rwhp but it will come online alot faster, then what you are looking at.

You can have your stock fuel rail modified to fit stock 850's in the primary injectors spot. I know rotorsports does the conversion, cause thats what I did. Go with 850/1200 or 550/1600's. The t-88 is a waste, go with the gt35/40 or the t-78. Personally I like the gt35/40 better due to the spooling characteristics. Oh also rotorsports can set up a map for that setup, you could probably send off the pfc to Brian to be re-setup, then fine tune where you need yourself.

Of course I'd like to run more boost. But I don't know if I'm save with the stock port and seals. I'll go with the T78 cause I don't have time to wait for a custom GT3540 setup. Yeah, the oct numbers are the same here. We have 93, 95, 98 and brand new 99oct at the station. Or kerosin at the airport. https://www.nopistons.com/forums/pub...R#>/tongue.png

Is someone running a T78 with the PFC?

jspecracer was runninh 4*1300s on stock twins

nope. I ran 850 x 4. Never got them bored out to 1300 X 4....



either way, I'm using 550cc primary and 1680cc secondary. Runs real good. I will eventually be going 550 primary/1680 secondary/720 subs....since I'm going T-45S https://www.nopistons.com/forums/pub...IR#>/blink.png

Why not go with bigger primaries? Why add a 3rd set?

sorry man, I thought I saw that.

so I will use 850s / 1300s on the T78. can't wait to run the setup.

stuff will be here by the next week and on 10.-11.05 we have a promising 1/4mile event called "Bitburg 1 on 1"

I'll be prepared. https://www.nopistons.com/forums/pub...IR#>/bigok.gif

you'd be better off with 550 x 1680's.. No matter what you need to get the computer rewritten for injector change over etc to get it to really work right with larger injectors. If you get the datalogit I can help you with setting it up to run right and get the injector change over to occure smoothly.



with the 550 primarys it will be easy to tune everyday driving and you'll get good gas milage as well.. We've played around with moding the primary fuel rail and running the 850 side feed injectors but it will always run way rich on the bottom end due to poor atomization of the fuel because the spray pattern of the short 850's doesn't work well in the primary injector area as it sits too high. It will also be cheaper to run the 1680's and sock 550's as well..

yeah, thanks dragon.

I'll put in the 850/1300s for the drag event now (no time to wait for other stuff). later I'll get the datalogit and 1680s for sure. will come back to you https://www.nopistons.com/forums/pub...#>/biggrin.png



Vosko: I checked the oct. numbers. race gas has the same oct (110) but the pump gas is really different. your 93 is our 98. but we just got the new 100oct at the station which should be 95 in the states.

110 octane is good stuff https://www.nopistons.com/forums/pub...1047683827.gif

how much is 110oct in the states?

$3.99/gal at the gas station where I live for 109.5 Turbo Blue Race Gas.

at the race track its $6 gallon for 116 octane

We pay $4.50/gal for 114 octane at our local strip.

that's sooo great! send me a truck! https://www.nopistons.com/forums/pub...1047683683.gif https://www.nopistons.com/forums/pub...1047683683.gif https://www.nopistons.com/forums/pub...1047683683.gif

How is Germany these days? I was stationed there from Oct 90-Nov 93 up in the Bremen area at Garlstadt for a year and down by Frankfurt in Hanau for 2 years. I don't think a 13B will take very well to the autobahn and all that Wangan stuff...

Speaking of octane.. is there really any difference in the performance? https://www.nopistons.com/forums/pub...1047683561.gif

The higher the octane rating the slower the fuel burns. The slower it burns the less you will experience the effects of detonation. Detonation is when your fuel pre-ignites earlier in the power stroke then its supposed to. Causing colliding flame fronts and possible engine damage.



For example; an aggressive tune might be set right below the detonation threshhold at WOT and under full load with said octane rated fuel. Say that tune gets you 15psi boost on 91 octane fuel - Increase the fuel to 110 octane and you just raised your detonation threshold, now you can safely run 22psi of boost.. Detonation is usually your limit to how much boost you can run on a given set-up. Another factor that decreases your detonation threshold is inlet air temperature.



Thats why many people use intercoolers. A good intercooler lowers your air inlet temperature, this does two things. It increases the volume of air you can force into the engine (within the i/c's max flow rating) thus increasing the mass in each cylinder and with the proper fuel ratio increasing the potenial energy rating of each cylinder. Just as higher octane lets you run more boost so will an i/c. If i/c A cools your charge temp to 210 degrees and i/c B can only cool to 250 degrees then i/c B will detonate the engine first.



A cooler aircharge is going to keep pre-ignition cylinder temperatures lower, this helps prevent pre-ignition.



With higher octane if you do have pre-ignition, its effects will be minimized when compared to a lower octane with the same boost levels.



So with higher octane you can run more boost and thus get more power and performance.





I hope this helps answer your question.



--Paul

Ok, cool. Yea I've heard that the higher the octane rating the slower the fuel burns..