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How did i make these numbers?

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Old May 26, 2009 | 01:42 PM
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674rwhp 694tq corrected numbers
This is a stock bottom end ls1 with a front mount custom built turbo with mods in sig at 10# of boost and 18* of timming. i was only really looking to make 550 to 560 to the wheels. The shop i had it tuned at couldnt believe it and the inj are only at 72%. with 94 octane and no knock
Does anyone have a explination for this freak of nature im going to have to turn the boost down now.
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Old May 26, 2009 | 01:46 PM
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are you the original owner?
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Old May 26, 2009 | 02:14 PM
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10#s seems a bit low but you aren't the first to push those kind of numbers on a dyno on a stock shortblock. Guys that leave em at that power level usually see a few hundred miles before they blow though. I'd suggest 550rwhp MAX.
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Old May 26, 2009 | 02:19 PM
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The boost level is ok..I probably would have took some timing out of it while tuning it. I would also double check whatever you are using to measure boost and make sure it really is on 10 psi, those are good numbers.
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Old May 26, 2009 | 02:24 PM
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Originally Posted by SaultysHuggerSS
674rwhp 694tq corrected numbers
This is a stock bottom end ls1 with a front mount custom built turbo with mods in sig at 10# of boost and 18* of timming. i was only really looking to make 550 to 560 to the wheels. The shop i had it tuned at couldnt believe it and the inj are only at 72%. with 94 octane and no knock
Does anyone have a explination for this freak of nature im going to have to turn the boost down now.
I had the same thing happen to me with my procharger setup. I was only thinking of 520 to 550 at the wheels and the car made 611 on 18* of timing and 7-8lbs of boost.
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Old May 26, 2009 | 02:51 PM
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Crazy numbers but i am with PM 93formto98T/A on this one i dont think you will be able to hold that kind of power for long on a stock block. Get your self a good set of pistons and a good balance and then your talking
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Old May 26, 2009 | 03:30 PM
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um, cause its a dyno and hp is a made up number that means absolutely nothing........

My suzuki 1200 bandit can make 1000 hp on the dyno, or it can make 5 hp. Its doesnt matter until it gets back on the same dyno.
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Old May 26, 2009 | 03:34 PM
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Hhhmm nice numbers! I needed this thread right about now! I'm finishing up my forged 347 t76 with 317 heads and 18psi and was begging to wonder if it was going to be worth the money if I didn't break 700 but this cheered me up!

Nice numbers congrats man!
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Old May 26, 2009 | 03:37 PM
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Originally Posted by 1320
um, cause its a dyno and hp is a made up number that means absolutely nothing........

My suzuki 1200 bandit can make 1000 hp on the dyno, or it can make 5 hp. Its doesnt matter until it gets back on the same dyno.
Take that on your parade. J/k

What size injectors? Also take it to the track before she blows, with that much power you should trap a least in the mid 130s.
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Old May 26, 2009 | 04:10 PM
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what kinda dyno was this?! have they recalibrated the dyno lately? my stock engine at 16 pounds on the 76mm would love that dyno
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Old May 26, 2009 | 04:22 PM
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This made me smile. finishing my stock bottom end with f1c on it hope it make close to that good luck till she blows
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Old May 26, 2009 | 04:36 PM
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Originally Posted by charged 434
This made me smile. finishing my stock bottom end with f1c on it hope it make close to that good luck till she blows

Stock bottom end here just did 600 hp at 5krpms with F1C and ran out of fuel
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Old May 26, 2009 | 05:41 PM
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im not the orginal owner of the car but i built it myself
also running 60#inj
not sure what dyno it is but thier was a stock ls1 on befor me and it made 330.
what would 10# be in Kpa? if i rember right i think that map was at 126 Kpa could be wrong tho.
Id love to take it to the track but i blew the trannie on the dyno im ordering a th400 tommrow
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Old May 26, 2009 | 05:56 PM
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Originally Posted by SaultysHuggerSS
im not the orginal owner of the car but i built it myself
also running 60#inj
not sure what dyno it is but thier was a stock ls1 on befor me and it made 330.
what would 10# be in Kpa? if i rember right i think that map was at 126 Kpa could be wrong tho.
Id love to take it to the track but i blew the trannie on the dyno im ordering a th400 tommrow
126 kpa is a little over 18 psi. 10 psi is 69 kpa
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Old May 26, 2009 | 06:13 PM
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ok i just looked it was at 175 kpa but how much kpa is natural atmospheric pressure
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Old May 26, 2009 | 06:35 PM
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Originally Posted by SaultysHuggerSS
ok i just looked it was at 175 kpa but how much kpa is natural atmospheric pressure
100 kpa, but I would think a gauge would be calibrated for that. It's not like N/A cars run around telling people they're running ~14psi depending on the weather lol.
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Old May 26, 2009 | 06:55 PM
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this will help with kPa to boost numbers
Attached Thumbnails How did i make these numbers?-boostkpa.jpg  
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Old May 26, 2009 | 07:06 PM
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Sounds like you were running ALOT more boost than you thought....
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Old May 26, 2009 | 07:19 PM
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Looks to be about 10.8# of boost. I'm putting the small green spring in I hate to say it but that's to much power for now good thing is the th400 is being built
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Old May 27, 2009 | 01:50 AM
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^^^ damm prety good numbers it must be the Turbo you have there... i told you the turbo was working good. do you have any new pics of your set-up?
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