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Old 03-11-2012, 10:39 PM   #31
ArthurJGuy
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Win!

Did any of the symptoms change?
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Old 03-15-2012, 06:47 PM   #32
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Quote:
Originally Posted by Audacious Nick...View Post
The procharger has a built-in tensioner.
So you don't recommend routing a string and measuring?

i agree thats what i did. get a string and measure.
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Old 03-15-2012, 06:52 PM   #33
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Originally Posted by Powered By V8...View Post
Curious....what are you guys seeing on the dyno sheet that indicates belt slippage?

the dyno sheet curbs look like snakes lol. they go up and down. means power then loose power then power back again.
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Old 03-17-2012, 11:28 PM   #34
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So I got the new intercooler installed, along with the reinforced tube(I thought it might have a hole), and new t-bolt clamps.
Still having the same issues. It will only build about 4-5lb of boost, and when the RPM start going up toward 5k, it will start hesitating and stuttering, then pops a P0151 code.
I replaced the oxygen sensor and checked all the clamps again, but still the same thing.

The belt is nice and tight, so it's definitely not belt slip. I'm not sure what the issue could be.
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Old 03-18-2012, 04:32 AM   #35
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Check the wiring on the sensor/ harness. http://www.obd-codes.com/p0151

Once you stop the belt slip you are going to need a re-tune.
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Old 03-18-2012, 04:48 AM   #36
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Already did. It was fine.
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Old 03-18-2012, 08:02 AM   #37
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To the guy who thinks a PC setup will peak at the same RPM as NA it is well known that centrifugal superchargers make more boost with more RPM. Your HP peak will always be close to redline.

To the OP have you checked for belt dust in and around the head unit? What notch is your tensioner torqued to, the PC recommendation of the first notch might be a little wimpy for the pulley size you are running. The crank is pinned right?
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Old 03-18-2012, 09:02 AM   #38
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I checked. No belt dust, belt is nice and tight, and the crank is double pinned.
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Old 03-18-2012, 09:41 AM   #39
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Nick do you have the old belt?

I wonder if the new belt curing slip has pushed you into a part of the table that is not tuned, causing what you are describing...
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Old 03-18-2012, 11:01 AM   #40
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Just put the old one on. Gonna try it.
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Old 03-18-2012, 10:11 PM   #41
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Nope, didn't fix it. It went up to 5,500 instead of 5,000 but the same thing.
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Old 03-19-2012, 08:38 AM   #42
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What do you think the chances are that it's the maf, without throwing a code?
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Old 03-19-2012, 08:49 AM   #43
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Quote:
Originally Posted by Audacious Nick...View Post
What do you think the chances are that it's the maf, without throwing a code?

I have a spare one if you want to try it. Impossible to say guessing online though.
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Old 03-19-2012, 10:31 AM   #44
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I'll have to try that out. I'll laugh if it's that simple.
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Old 01-16-2013, 05:32 AM   #45
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Update: got the boost reference fuel system installed, had it tuned.
I made 530rwhp and 466ft-lb of torque, stock cam.
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Old 01-16-2013, 06:32 AM   #46
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glad you bumped this one. i did h/c/tb upgrade and put down
415. thinking about putting a charger on in the next few months,
and should have a very good result !
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Old 01-16-2013, 07:59 AM   #47
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Don't know if I'm going to do a cam, because I'm getting a c6 soon.
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Old 01-16-2013, 08:06 AM   #48
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Quote:
Originally Posted by Audacious Nick...View Post
Mods are listed in signature.
Results:


Thoughts?
Car has 89,000 miles.

As most of us already know, dyno numbers really don't mean a whole lot but it will give you a basic idea as to what your car is producing. If your car has a stock cam, valve springs and stock bottom end , you might want to think about lowering your boost level just a little. I keep mine at around 6 PSI and my set up will allow me to go higher but I won't. My ride is a street car and that extra power I can receive with higher boost is just not needed plus my bottom up should stay safe and healthy.
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Old 01-16-2013, 08:39 AM   #49
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As long as you are running a good tune and don't abuse your car, the stock bottom end will last, even with 100-200rwhp more than I make.
Sure I could lower boost, but I drive it conservatively most of the time.
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Old 01-16-2013, 08:49 AM   #50
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Quote:
Originally Posted by Audacious Nick...View Post
As long as you are running a good tune and don't abuse your car, the stock bottom end will last, even with 100-200rwhp more than I make.
Sure I could lower boost, but I drive it conservatively most of the time.

Most if not all of us get heavy footed much more than we think. These stock bottom ends do hold up fairly well but I have seen my share of highly maintained cars suffer from major engine failure from high boost. What I do really like about our boosted cars is that you really don't have to put your foot deep on the pedal to get those rear tires shooting you forward like you were shot out of a cannon.
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Old 01-16-2013, 09:24 AM   #51
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What I like about the Procharger is that it drives pretty much like stock whenever I don't floor it.
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Old 01-17-2013, 06:05 AM   #52
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I'm happy to have my fuel issues sorted and get around the power I was expecting.
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Old 01-17-2013, 11:14 AM   #53
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What all is a boost reference fuel system?
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Old 01-17-2013, 11:45 AM   #54
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It just means that my fuel pressure regulator is hooked up to a vacuum source, which varies fuel pressure based on vacuum
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Old 01-30-2013, 11:11 AM   #55
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so what I am reading is a procharged 04 with headers exhaust good tune will produce 500 rwhp? I was thinking about a twin turbo kit and expect 550 575 with that. Am I on the right track?
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Old 01-30-2013, 01:11 PM   #56
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Well I got 530, another person got 500 without 243 heads. On the stock cam. With a cam designed for boost, I should be making around 600rwhp.
Twin turbo and power numbers depend entirely on the setup.
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Old 01-30-2013, 03:05 PM   #57
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What rpm was peak power? 6500rpm like in the earlier post on the previous page? How does the stock cam peak in your car at 6500rpm and 5500-5700rpm in every other LS1?
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Old 01-31-2013, 03:18 AM   #58
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Peak power was at 6,500 rpm.
What you have to realize, is this is a centri supercharger. It makes more boost, and therefore more power, the faster it spin. It's pretty typical, from what I have seen, for cars running in this horsepower range.
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Old 01-31-2013, 06:48 AM   #59
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Quote:
Originally Posted by Audacious Nick...View Post
Peak power was at 6,500 rpm.
What you have to realize, is this is a centri supercharger. It makes more boost, and therefore more power, the faster it spin. It's pretty typical, from what I have seen, for cars running in this horsepower range.

Ok. I admit to knowing nothing about FI but note how adding headers or other mods to a stock LS1 broadens the power curve but does not move the rpm peak higher. I thought peak power rpm was cam duration+LSA+LCA driven. Ah, the mysteries of FI.

Last edited by Felix C; 01-31-2013 at 08:30 AM.
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Old 01-31-2013, 06:27 PM   #60
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With a Procharger, or any centri, it is simple. Boost is based on the rpm. The faster you spin it, the more boost produces.
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