MannyZ28

iTrader: (1)

Just want to get more info and input on the pull I got out of the car yesterday. The numbers seem low to me...and I have read posts where people had the cam installed and where off one sprocket....



Does that look normal for my cam? (See signature)

Thanks!

Manny

Patrick G

iTrader: (14)

If you were off one tooth, your car would run like ***. Your dyno curve looks like it should, peaking at the proper rpm.

badaSS346

iTrader: (4)

Ill let you know later today, i have a similar cam (i think) and Im having my car tuned and we will see what she can pull. Im looking for 395+ rwhp. They were at 390 yesterday so hopfully they will be able to find a few more. Your headers, are they long tubes? It not, that could be where you losing some power. Do you have cats? Thats another thing that can be robbing you.

MannyZ28

iTrader: (1)

But my numbers suck ***!!!!

Where should I look for the hp that's not there? Using SAE correction, it only makes 368 hp!!!

badaSS346

iTrader: (4)

well?

MannyZ28

iTrader: (1)

Yes, my headers are stainless steel longtubes....the Y pipe is 2.5" vs the usual 3".....I did that so I won't lose as much low end torque, plus, at the time I figured I'd have less of a Y pipe banging issue...boy, was I wrong. But that's resolved now. And yeah, I do have Random tech cats...they are tiny little things, very free flowing, you can actually look through them.

I also have another problem. After the tune yesteday, the car threw a SES while driving...and now, when it's warmed up all the way, the idle surges between 800 and 900 rpm...hell, due to my pulley the lights actually dim when it does that!

I have to get it scanned yet to see what code it threw, but I am extremely pissed, isn't tuning supposed to get rid of all that SES nonsense? I had him lower the idle from 900 to the "recommended" (that's what it said on it's screen) 812 rpm. It never surged before!

Manny

Dixit

iTrader: (1)

But SAE is the more standarized method for HP ratings. STD is always 2-5% higher and doesnt account for altitude corrections and barometer changes as well as SAE does.

Dixit

badaSS346

iTrader: (4)

Cats, even high flow ones, will cost you some power. What code is it throwing. Who ever tuned the car, is he a Sponser?

Krab

iTrader: (28)

Your numbers don't look that off. I've got the same cam and also dynoed in high 90 degree heat and high humidity and put down 376rwhp and tq. Although it was through an ls1 intake... Those 17x11's are kinda heavy, so that might be costing you a few ponies also.

CWallen

iTrader: (12)

In your sig it says "Modded MAF". What does that mean? I know if you do anything to a MAF it can really throw hp numbers off.

MannyZ28

iTrader: (1)

I think the maf was polished or something?? I am not really sure....I think she just cleaned it though, it had some **** on it, but that was done when the car was dynoed and tuned with the headers and LS6 intake only. Besides that, they also ported the TB.

Not only does my car rather heavy 11's on it, I also have a steel drive shaft, not sure if that's robbing power too. My car was an oddball to say the least. I bought it new in 98, and it had 235/55/16 tires on it, and because of that, it had the 117 mph speed limiter and the steel driveshaft. My car was also lowered from the factory, especially noticeable in the rear. It just never had that "offroad" look and it still sits a bit more than an inch lower then my buddies 99 which is still bone stock as far as suspension is concerned.

The car was tuend by a shop here called Pro Auto Tech. They are an authorized Callaway installer, and they made the impression that they knew what they were doing.

I still don't know what codes it's throwing right now, I am gonna have it checked tonight after 6 PM once I get out of work. I am wondering that if it is the O2 sensors again, that maybe they have something to do with it surging between 800 and 900 rpm at idle when it's hot? I kinda doubt it since I had O2 sensor codes before, but I would have never known if it wasn't for the SES light, I couldn't tell any difference in performance at all.

Thanks for all you guys' input!

Manny

Ravenous T\A

iTrader: (12)

my old TR224 cam did 378rwhp/378rwtq.....those number dont seem to off to me then.

MannyZ28

iTrader: (1)

My car has always been low on torque...not sure why....

but yeah, my numbers are pretty close to yours, although were your numbers STD or SAE? Mine are STD....the SAE version is like 369 hp....forgot what the torque was.

I did dyno on a 100 degree day though....typical Florida weather.

Ravenous T\A

iTrader: (12)

The weather has alot to do with what your car puts down, I think mine was SAE? but im not sure have to check when I get home. All kinds of factors come into play on the dyno like temps,tire pressue, humidity, just try it out at the track and see how she does.

dug

iTrader: (10)

maybe the tr224 cam is over rated. Cats will cost you 10-15hp with that cam.

MannyZ28

iTrader: (1)

Once those cats get cruddy and nasty...I am gonna stick something through them until I have an unobstructed view of the world when I look through them

DONAIMIAN

iTrader: (18)

Is the car pulling any timing or anything at WOT. The graph breaks up pretty bad uptop, and the same thing happened to me. Also I think you should raise the idle back up to 900. My baby 221 cam sits there quite well, I brought it down to 800 before and it had the same problems you had.

dug

iTrader: (10)

yeah, cats cost more hp than people realize. How does the car feel with the cam? Much faster and torquey?

MannyZ28

iTrader: (1)

Oh yeah...it feels good!

Pull timing up top...what would cause that? The graph is at 0 smoothing, so that might have to do with it looking a bit choppy up top too.

And yeah...maybe 875 or 900 idle would be better, the car shakes quite a bit the way it is now.

MannyZ28

iTrader: (1)

Ok, I had the car scanned and this is what came up for error codes:

Set DTCs (codes)

History DTC P1153
HO2S Bank2 Sen1
Insufficient Switching
MIL Requested
Since IGN NOT RUN
Since Clear P/F

I had my issues with my headers and O2 sensors. Did all sorts of swapping around until the rear ones were deleted when the car was tuned, and the front ones were replaced by Corvette rear O2 sensors (Bosch 13111). The Bosch sensors did good until one day the passenger side one came up with this code...1153. I had it cleared and a few days later it came back. This time I swapped the passenger side with the driver side sensor, and after doing that had the codes read (both of them threw a code, 1133 and 1153), and then had both cleared again. After that the 1153 came back one more time, but disappeared on its own...and nothing has come up so far until now.

So is this just a history code, or is one O2 sensor really malfunctioning again?

Man, I am getting so damn tired of this...sometimes I wish I had never stopped modding this thing.