andymoraitis
15+ Year Contributor
- 3,241
- 153
- Jan 25, 2004
-
Utica,
Michigan
I'm hoping that some of you more experienced tuners can give me a hand in understanding what is correct for my setup. Let me preface this by saying that I am fully aware that an EGT is not a tuning device since high readings can be seen by running rich or lean. Anyway, let me post my setup and my questions.
1998 GSX AWD
Injen Intake with 4" filter
Big 16G Turbo
Walbro 190 Fuel Pump
Buschur Upper I/C with 1G BOV
Full 3" Exhaust with 3" High Flow Cat
Stock Injectors
Buschur MBC
Stock SMIC
95 EPROM ECU with KeyDiver Stage III Chip (no fuel cut)
Here we go. This car was pretty much a mess when I bought it and after I took a trip to Buschur Racing, Dave and Dan installed the upper I/C, BOV, MBC and changed the plugs and wires, it ran like it was supposed to. Boost was set at 15 psi since I still had the stock pump although it would occasionally creep to 16. In speaking to Dave he told me that with a 190 pump on 93 octane that I could run 17-18 psi safely. Within the next month or so, I added the 190.
As colder weather hit, the car wanted to creep more (up to 3 PSI) so I called Dave and also Mike Welch from RRE and both of them advised that I set the boost to the point it would creep to and see if that solved the issue. So I set it to 17 and it only creeps to 18. I noticed my EGT's would rise rapidly and peak at between 1580-1610 at the top of third gear. I got back to Mike at RRE who told me this is where I wanted to be and Dave who red flagged it and said I need 550's.
What concerns me is the info on RRE's website that says that 17-18 psi on a fuel pump upgrade with 93 octane is OK while Dave is telling me I'm in the danger zone. I've also referenced some additional threads in which other tuners are running close to 1600 or more at the top of third and no one seems to think anything of it. As a safety precaution, I've ordered a set of 550's which will be going in this week as well as a new DSMChip to compensate for the bigger injectors and fire them like stock 450's (with a deadtime adjustment).
You guys MUST be tired after reading all of that, but bear with me as I have two questions:
1. Did I just waste a few hundred bucks when I could have kept the car on stock 450's?
2. I noticed that most people tap their EGT probes on the top of #1 runner. Mine is tapped on the side of #1 (it was already installed when I bought the car) and I'm wondering if this isn't causing me to have higher readings.
As a form of checking whether I'm rich or lean, I pulled all four plugs and all of them have tan electrodes and no sign of running lean whatsoever. As a matter of fact, #1 looked as good as #4.
Again, sorry for the length, but I would appreciate some factual information regarding the above. Thanks in advance!
Andy
1998 GSX AWD
Injen Intake with 4" filter
Big 16G Turbo
Walbro 190 Fuel Pump
Buschur Upper I/C with 1G BOV
Full 3" Exhaust with 3" High Flow Cat
Stock Injectors
Buschur MBC
Stock SMIC
95 EPROM ECU with KeyDiver Stage III Chip (no fuel cut)
Here we go. This car was pretty much a mess when I bought it and after I took a trip to Buschur Racing, Dave and Dan installed the upper I/C, BOV, MBC and changed the plugs and wires, it ran like it was supposed to. Boost was set at 15 psi since I still had the stock pump although it would occasionally creep to 16. In speaking to Dave he told me that with a 190 pump on 93 octane that I could run 17-18 psi safely. Within the next month or so, I added the 190.
As colder weather hit, the car wanted to creep more (up to 3 PSI) so I called Dave and also Mike Welch from RRE and both of them advised that I set the boost to the point it would creep to and see if that solved the issue. So I set it to 17 and it only creeps to 18. I noticed my EGT's would rise rapidly and peak at between 1580-1610 at the top of third gear. I got back to Mike at RRE who told me this is where I wanted to be and Dave who red flagged it and said I need 550's.
What concerns me is the info on RRE's website that says that 17-18 psi on a fuel pump upgrade with 93 octane is OK while Dave is telling me I'm in the danger zone. I've also referenced some additional threads in which other tuners are running close to 1600 or more at the top of third and no one seems to think anything of it. As a safety precaution, I've ordered a set of 550's which will be going in this week as well as a new DSMChip to compensate for the bigger injectors and fire them like stock 450's (with a deadtime adjustment).
You guys MUST be tired after reading all of that, but bear with me as I have two questions:
1. Did I just waste a few hundred bucks when I could have kept the car on stock 450's?
2. I noticed that most people tap their EGT probes on the top of #1 runner. Mine is tapped on the side of #1 (it was already installed when I bought the car) and I'm wondering if this isn't causing me to have higher readings.
As a form of checking whether I'm rich or lean, I pulled all four plugs and all of them have tan electrodes and no sign of running lean whatsoever. As a matter of fact, #1 looked as good as #4.
Again, sorry for the length, but I would appreciate some factual information regarding the above. Thanks in advance!
Andy