So the car is going to get tuned tomorrow. I installed the wideband gauge and wired it up, they will drill the exhaust and install the O2 sensor before it is tuned.

My car has a 3 bar fuel pressure regulator, big turbo, 3" exhaust, and all the goodies.

Included with that is a chip with a switch that has multiple maps, one for stock, then 15 PSI, 18 PSI and 21 PSI. Right now it's on 15 PSI and the boost regulator is set to a maximum of 15 PSI.

I have a split second piggy back to adjust fuel trims for a given RPM and boost level.

Question: I will ONLY run pump gas (93 Octane in Chicago) and am planning on having it tuned to 15 PSI.

Using pump gas, should I or can I run 18 PSI and have it tuned? I change the fuel map, set up a different file in the Split Second timer, and then change the fuel maps accordingly. Or is 18 PSI just too much for pump gas/stock engine components?

The engine is stock (never been taken apart) and has 80K miles on it. I don't want to blow anything up.

I take it that the 21 PSI would only be for race fuel.

The car is getting professionally tuned, I will be there to watch and learn. Will video some of it.

Thanks for the advice!

 

can't wait for results

 

What is the "big" turbo? The split second stuff is really old.

Without exact specs its hard to answer your questions.

 

Here are the specifics:

Speed Force Racing (SFR) Blow through MAF
SFR Stage 1 header, ceramic coated
SFR 3 Inch downpipe, ceramic coated
SFR 3 Inch Cat back exhaust
New Turbonetics 60-1 HiFi ball bearing turbo ($1200)
86lb Injectors
3 bar fuel pressure regulator
Braided fuel lines
High volume fuel pump
New fuel filter
Tial 38mm Wastegate
New Lindsay Racing stage 2 intercooler
New MSD 6AL BTM ignition box
New MSD blaster coil
maxhpkit.com chip with three maps for 15 PSI, 18 PSI and 21 PSI
Split Second piggy back

 

The dyno should have its own O2 sensor (compare them to see if they are in agreement, I carry 2 on my car). Keep an eye on the AFRs and knocks. 18 psi is doable on 93 Octane dependent on timing.

 

330-345rwhp

 

Those are big injectors for only 15 psi... Same for the turbo.

 

I would love to see that car, where are you located?

 

I am in Forest Park

 

Its like half an hour away from me, are you in chicagoland porsche 924/944/968 owners page on facebook?

 

Nope...I don't do facebook

 

Ah. Well we have around 70 people in group already

 

Who is doing the tuning?

 

P and L Motorsports in Franklin Park, IL. I'm waiting in the lobby right now. They should get to it within an hour or two.