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Old 02-20-2012, 08:21 PM   #1
Audacious Nick
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2004 Procharged GTO Dyno results

Mods are listed in signature.
Results:


Thoughts?
Car has 89,000 miles.

Update: car retuned, made 530rwhp and 466rwtq.

Last edited by Audacious Nick; 02-01-2013 at 06:23 AM.
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Old 02-20-2012, 09:12 PM   #2
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ive got 243's port/polish.. ready to go on my 04. JBA's,.. @ 340/350 right now.......ive been eye F'n the procharger and your set up is what i would be running almost exactly. im also anxious to see if your numbers or normal, high, ect?... i was hoping with procharger and front mount to be at least 500 to the wheels.... hummmm
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Old 02-20-2012, 09:46 PM   #3
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Same here, I was expecting it to easily break 500rwhp.
I am going to re-test for boost leaks and belt slip.
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Old 02-20-2012, 10:31 PM   #4
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That boost chart is clearly showing a massive amount of belt slip, I couldn't see it on the smaller image you sent me earlier.
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Old 02-20-2012, 10:59 PM   #5
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That should most definitely be higher. Those numbers are more in line with the TVS1900
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Old 02-21-2012, 02:12 AM   #6
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Quote:
Originally Posted by Audacious Nick...View Post
Mods are listed in signature.
Results:


Thoughts?
Car has 89,000 miles.


Your sig. does not include a cam and the dyno sheet shows a 6500rpm power peak. What camshaft? Stock peaks at about 5700rpm.
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Old 02-21-2012, 04:33 AM   #7
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Something isn't right, check for leaks and belt slip. What brand pulley do you have?
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Old 02-21-2012, 05:56 AM   #8
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It's a Dayco gold belt on a reichard racing 3.30" pulley.
I've got a stock camshaft as far as I know.

Last edited by Audacious Nick; 02-21-2012 at 06:31 AM.
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Old 02-21-2012, 06:50 AM   #9
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Those are big injectors.
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Old 02-21-2012, 07:16 AM   #10
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Ya, definitely check your belt and get a retest. You should be well over 500 with your setup.
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Old 02-21-2012, 07:17 AM   #11
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Forgot to add- dynos are just instruments for tuning, take it to the track and see how it does there and use that to compare.
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Old 02-21-2012, 08:28 AM   #12
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Quote:
Originally Posted by HuggerZ...View Post
Forgot to add- dynos are just instruments for tuning, take it to the track and see how it does there and use that to compare.

In Vegas he will be happier if he just stays on the dyno.
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Old 02-21-2012, 08:35 AM   #13
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Yeah, I'm going to double-check the belt length as well, shouldn't have assumed it was correct.
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Old 02-21-2012, 08:40 AM   #14
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Quote:
Originally Posted by Audacious Nick...View Post
Yeah, I'm going to double-check the belt length as well, shouldn't have assumed it was correct.

Nick, here is what I do for belt length.

Go to Autozone and buy a range of 4 or 5 belts in close sizes in half inch increments, they are like $14 a belt. Go home and test fit them and find the right size to have proper belt tension (don't drive with them on, just test fit)

Go return ALL those belts to Autozone and go to NAPA and order a NAPA brand belt in that size (NAPA belts are Gates).

Also, what tensioner do you have? I don't know if Procharger supplies a new one but I can guarantee a OEM tensioner won't cut it. If it is the OEM one you need a Maggie HD tensioner or a ECS tensioner BADLY.

I doubt there is a boost leak, It looks like hardcore belt slip and that's what I'd address first.
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Old 02-21-2012, 09:27 AM   #15
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Quote:
Originally Posted by ArthurJGuy...View Post
Nick, here is what I do for belt length.

Go to Autozone and buy a range of 4 or 5 belts in close sizes in half inch increments, they are like $14 a belt. Go home and test fit them and find the right size to have proper belt tension (don't drive with them on, just test fit)

Go return ALL those belts to Autozone and go to NAPA and order a NAPA brand belt in that size (NAPA belts are Gates).

Also, what tensioner do you have? I don't know if Procharger supplies a new one but I can guarantee a OEM tensioner won't cut it. If it is the OEM one you need a Maggie HD tensioner or a ECS tensioner BADLY.

I doubt there is a boost leak, It looks like hardcore belt slip and that's what I'd address first.

The procharger has a built-in tensioner.
So you don't recommend routing a string and measuring?
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Old 02-21-2012, 09:31 AM   #16
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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?

The string method only works if you have a way of holding the tensioner in position and it's a guess, usually you end up doing the same method I mentioned above after the string.
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Old 02-21-2012, 08:33 PM   #17
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Getting a new belt tomorrow, then going back and seeing what kind of numbers I can pull with that.
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Old 02-21-2012, 09:05 PM   #18
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Great numbers, although I hope that bottom end holds with those numbers!
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Old 02-21-2012, 09:40 PM   #19
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The funny part was with the base tune he put on there, I made 488rwhp at 8.06 pounds of boost.
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Old 02-22-2012, 03:18 PM   #20
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Good lord , well I put the Maggie (8lbs)on at 116k miles.. She lasted until 122k until rod knock became very obvious..oh well, I just took initiative and built another one JIC and thank god I did.. I don't track the car either and drive roughly 30 miles a day..Like I said though congrats because that is A LOT of power out of a stock bottom end
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Old 02-22-2012, 03:47 PM   #21
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That is not a lot out of a stock bottom end...
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Old 02-22-2012, 03:48 PM   #22
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Quote:
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That is not a lot out of a stock bottom end...

Not at all, I wouldn't even break a sweat until it made at least 100 more.
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Old 02-22-2012, 03:54 PM   #23
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I'm not concerned until I'm making at least 550 at the wheel.
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Old 02-22-2012, 04:06 PM   #24
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Nick. Stock springs? I am serious and correct that the stock LS1 camshaft peaks at about 5700rpm. I do not see FI increasing the HP rpm. Do you have a pre-Procharger dyno? Do you know if the previous owner modded the car? I presume you are 2nd owner from the join date.

Please do not take my inquiry as a negative. I am astonishd the LS1 camshaft peakd at 6500rpm. LS6 camshaft peaks at about 6200rpm or so.
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Old 02-22-2012, 06:07 PM   #25
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And I understand where some people will say its "not a lot". But we are talking about Boost here, think about mileage and years on the Rings, pistons.. Not an easy task for it take on especially after bein used to no boost. I don't gamble. Once again though to the OP that is one badass goat to make those numbers and run strong, just sharing some experiences..
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Old 02-22-2012, 08:33 PM   #26
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I am only running it because it's the pulley that came with it. Do you think swapping to a 3.4 pulley would help me? I got a new belt today, put it on, and I definitely noticed a difference.
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Old 03-05-2012, 07:01 PM   #27
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My block is still together at 525 whp, heavy duty double springs tho
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Old 03-10-2012, 04:19 PM   #28
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Curious....what are you guys seeing on the dyno sheet that indicates belt slippage?
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Old 03-10-2012, 05:11 PM   #29
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Quote:
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Curious....what are you guys seeing on the dyno sheet that indicates belt slippage?

You see how the boost curve looks like the Rocky Mountains?
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Old 03-11-2012, 08:01 PM   #30
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Intercooler change:
Before:


After:
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