DriftingThunder said:
Well I woulda thought with the double intercooler and 950 cfm fan for it that the air temps would be...
The problem with a conventional 2x IC is that there isn't a way to prevent a vast majority of the air from going into the front core. An air diffuser should be in there to even the flow between the 2 cores. That greatly increases the efficiency of the IC. Without that, a standard 2x IC is marginally better than a stock IC.
DriftingThunder said:
I don't know to what extent the car was or was not tuned, the previous owner had it done. HBK94SC was the previous owner up in Michigan. He mentioned it was tuned for 94 octane gas though. I am under the impression that it was actually dyno tuned.
Have you made any mods to the car since you got it? You'd be amazed at how easy it is to mess up a tune by installing one little part.
DriftingThunder said:
Not sure on air/fuel or fuel pressure in general, but aren't the fuel pumps in these cars kinda wussy?
Yes, they are, and considering the age, they could easily go out at about any time. Check with the previous owner to see if he changed it when he owned it. You can also check fuel pressure on the fuel rail with a fuel pressure guage. Pretty easy to do.
DriftingThunder said:
I still have the stock blower pulley and I've been wanting to put it back on actually. Pegging the boost gauge is fun but I understand right now it's making my car slower and just making more heat and risking headgaskets even more.
I thought it was a fuel issue because of those spikes on the dyno after 3800 rpms. Isn't that the knock sensor messing with timing? Meaning the car was running too lean up top? I also wanted to ask why the power and torque dropped as much as it did on the second pull. Is it because they only waited 11 minutes maybe? I noticed several of the spikes went away though.
Definatly a pulley change will help to get your SC performing better. A 10% on there is quite a bit on a '94-'95 SC. Dave D had difficulty tuning a '94 with only a 5% pulley on there. You could try an '89-'93 pulley to see if that helps. It should, but without much more knowledge about the workings of the car, it's really hard to say.
I'm not sure what would cause the "spikes" on the dyno. I'm not that familiar with interpreting dyno charts yet. But your second pull is lower because of heat soak. It's also possible that some tuning was done to richen the a/f ratio which could drop your power slightly, but give you a much safer ratio that won't cause as much strain on your engine...and HG's!
I'd pay the money to get it back on a dyno so you can see what the intake temps are at given rpm's as well as the a/f ratio. Especially if you've made any mods to the car since you got it. The $50 or so that you would pay to have that done can save you a lot of headache in the future. And it will give you a really good starting point to from instead of shooting in the dark.