1999 hotside, PCPro, 105/65mm

[peternguyen02]

Long time lurker here with a 1999 with a Stage One MP62 hotside with a PowerCard Pro and 105/65mm pulleys (~7psi). Car runs much better now than it ever did with the 'black box'. Just have to thank Tom for all his patience and help.

http://i151.photobucket.com/albums/s148/peternguyen02/SOTMP62PCPro105mm.jpg

[Tom @ Fast Forward]

Cool. Looks like it is leaning out at the top and power is dropping off accordingly. You could add a couple lights with the red zone (5000-7500) and maybe pick up a couple WHP. Not too good to do leaner than 13:1 at 7000. Other than that it looks great.

[peternguyen02]

The red is at it's max, as is the yellow/blue and red/blue. I think this is the extent that the stock injectors can take me. For now I'll just have to limit myself to 6.5k RPM.

[Tom @ Fast Forward]

If you want to pull it and send it back to me, I can significantly increase the level the Red zone can add.

[peternguyen02]

In that case, I think i'll need to schedule another dyno run in a few weeks. I'll try to get it on its way before the weekend. By the way, yellow is also set to the max, if that changes anything.

[Tom @ Fast Forward]

You'll make a good test monkey for it. I'll set them to be able to go 100% adder. We'll get to see how much they can do. :) I have them limited them as normally the 5th injector does the added fuel.

Green is set to 25% max. Yellow to 25% max and red to 35% max.

On the other hand, the stock settings should have had enough fuel to make 175WHP. Something seems wrong there.

[peternguyen02]

Well, to tell you the truth I never tried the new pulley with the stock settings. I started the runs using the settings I had for the 95mm pulley, which was 2-green, 6-yellow, 6-red, 8yellow/blue, 8 red/blue. I was planning on just turning the settings down if it was too rich, but it turned out being a bit lean. Do you think that could be what's wrong?

[Tom @ Fast Forward]

Actually, I am impressed that you are making 180WHP o a 95mm pulley on a hotside. Hey Bill, that is pretty good, isn't it? A bigger pulley would just make things leaner, I would think.

Are you running WI by any chance?

[Tom @ Fast Forward]

Oops. Forget that last post. I mis-understood. You are running the 105mm pulley. Sorry. That looks about right for a hotside and 105/65. It might be a bit lean but I think we can turn it up with a different set of settings.

[peternguyen02]

I probably should have worded things more carefully. All runs were with the 105 pulley, but I was using the settings that I used for the 95mm pulley, with the 105mm pulley actually on, on the first run. I was hesitant to start with leaner settings with a bigger pulley, which would have been the default settings.

However, I remember reading somewhere that the fuel curve was programmed for higher boost than what the 95mm pulley was blowing. I was under the impression that the default settings would add the correct amount fuel if the system saw higher boost, which is why I'm wondering if starting out with yellow/blue and red/blue at the max might be a mistake. Also, I'm not running WI.

[Tom @ Fast Forward]

Exactly. That is why I think something is wrong? But the perhaps, the lack of the 5th injector? If we could just bring that curve down a halfg pointand keep it there to the end it would be great.

You just can't hardly beat that straight line HP curve until the last 500 RPM or so.

Could be that the key is low boost for the fuel map I have programmed? What are you getting for boost at the start and at red line?

[Banshee]

I think the problem is that it only see 7psi. Shouldn't it be closer to 10psi with that pulley and no I/C?

[peternguyen02]

I didn't have the vacuum line hooked up to the dyno so the best info I can give you is what I've seen on a gauge. It only hits 7psi above ~6.2k RPM hitting just above 7psi at redline. From ~3k RPM to ~5.5K RPM the boost hovers between 5 and 6psi. Keep in mind that I have a lot of difficulty looking at two gauges at the same time :-). Next trip to the dyno, I'll record the boost.

Oh, and I only saw a max of 5psi with the 95mm pulley, so I think that 7psi with the 105mm pulley is about right on for a hotside.

[BlownMX5]

Oh, and I only saw a max of 5psi with the 95mm pulley, so I think that 7psi with the 105mm pulley is about right on for a hotside.

I have a 105/65 also and I get right at 7psi. When I was at 95/65, I only saw about 4.5psi, but that was with the BRP pulleys (slippage).

Pat.

[Tom @ Fast Forward]

well then I think it is probably the boost level that is low on my curve so it is a little lean. Send it back and I can try raising the fuel. Of course I have bigger pulleys in stock to kick up the boost and fuel at the same time. Chu\ck said he didn't want that 120mm pulley anymore. ;)

[chuckerants]

Chuck said he didn't want that 120mm pulley anymore. ;)

Hey now, I don't recall ever saying those words exactly.

[peternguyen02]

You're one hell of a salesman, Tom, but I think I'm going to have to wait on the 120. The PCPro, however, is on its way.

[Tom @ Fast Forward]

I will re-program and up the Green, Yellow and Red values so we can see what happens.