TERRIBLE!! Paxton Supercharged srt-10 performance - Dodge Ram SRT-10 Forum
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post #1 of 31 Old 12-15-2004, 08:53 PM Thread Starter
DJWR
 
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TERRIBLE!! Paxton Supercharged srt-10 performance

Hi Folks.

I Just registered myself, I am Disraeli W. Head Tuner of Kartec Tuning here in Caracas, Venezuela, and I now have a good knowledge regarding the performance of the srt10 after one of my friends "wasted" almost 9000 USD in a Paxton supercharger kit for a 8 HP increase, I will explain you why!!

Here are the facts

STR10 2005, v10 500 HP, 500, Ft-lbs, 500 Watts, Black
Imported from the states one month ago

Dynoed 480 HP BONE STOCK on high altitute (890 mm of atmos absolute pressure)

Paxton supercharger kit (NOVI 2000) installed:
Charge air cooler (75%-25% water-coolant mix)
BOV
Heat exchanger core front mounted.
Twin Sequential fuel pumps, 105 psi of max fuel pressure at constant 7 psi of boost
Split Second Piggy back computer (timing controller box), according to paxton it will delay ignition timing based on manifold boost pressure, good manifold boost pressure source for it.
Stable boost pressure
Everything else in quiet order.

Results:

1st Pull
Water temp 190F deg
Air intake temp 40-55 deg (celcious) Location of the sensor upstream the supercharger 2 inches before the trhottle where the kits says it should go
95 octane
Dynoed 610 HP (28-30% HP increase, very dissapointed at the beggining but okey so far...)
Water and Air intake temp are "Cold"


Second pull
Water temp 200F deg
Air intake temp 55-75 deg same location
95 octane, and same weather conditions
Dynoed 550HP (lost 10%)
Seems to be due to higher inlet air temps than 1st pull (fans on teh dyno room working perfect, High velocity and flow)

Third Pull
Water Temp 210F deg
Air intake temps 65-85D same location
95 octane, same everything
Dynoed 488 HP (lost 20% from initial run)

Running 5 heat range plug, no detonation from digital knock sensor displays on each motor bank, suggested heat range 6

11.0 to 1 or richer at higher rpms Air fuel ratio on all pulls at that Massive and extreme, overengineering 105 psi on the fuel system.


Findings

THE CHARGE AIR COOLER CORE IS QUITE SMALL FOR THE APPLICATION (WILL SUFFER FROM RAPIDLY HEAT SOAK EVEN ON HIGHWAYS OR EXTREME FANS ON IT ON THE DYNO) you will lost around 10-12% from cold initial runs-

YOU WILL HAVE DECENT PERFORMANCE JUST WHEN YOUR TRUCK IS BELLOW 200F OF WATER TEMP. (I think no one wants a 9000 kit to last just a few seconds before it turns to a big hair dryer and instable on power delivery)

IF YOU WANT TO USE THIS KIT, YOU WILL NEED LOTS OF SUPPORTING MODS.
(Colder Roe Termostast, radiator shrouds, bigger heat exchanger core, higher flowing water pump of the cooler system, and maybe, if you can keep the water temp bellow 200 it will feel and be fast!!

I am sorry to tell but we are very dissapointed. It is a very straight forward kit, simple instalation, mechanical fueling approach and simple ignition retard setup.

All dodges PCM seems to be pulling timing when truck is warm, power inestability is increased in the presence of the supercharger.

If someone has suffer from the same story please share it.

Coments are welcome.

Thanks for your attention

DJ
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post #2 of 31 Old 12-15-2004, 09:46 PM
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Thumbs up Paxton/Supercharger

I have had absolutely NO problems. If you read back on a couple of these posts...you'll see we've had several discussions on TUNERS. We're NOT talking installers, we're talking TUNERS.
I happen to be using one the best on the planet..maybe the Universe.
BTW these KITS installed on a "VIPER" are getting OVER 670+rwhp. with a much tighter and more confinded space for the intercooler.(i.e.HOTTER)


SORRY about your BAD experience w/this product.


Quick:-(

p/s: over 1,000mi. and over 600+rwhp./91 octane
12.15.04
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post #3 of 31 Old 12-15-2004, 10:04 PM
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Or better yet, why don't you give Dan a call..here's his #
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post #4 of 31 Old 12-16-2004, 05:52 AM Thread Starter
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Thanks, so it means that you are not having heat issue/power losses with your kit.

Have you dynoed it several times/pulls?

Who is Dan? did he install/tune the kit the kit in your truck?

Did you remove cats and trip the cel?

Where is your IAT sensor located?

Thanks so far you are the only support as Paxton wonŽt help that much seems they are "not aware of this problem before" so they canŽt help fixing it

DJ
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post #5 of 31 Old 12-16-2004, 06:19 AM
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PLEASE call Dan..310.841.6996, he knows a few of the people @ Paxton.
He may be able to help you. And that was three(3) pulls, worst was 580rwhp.
And the worst came FIRST when it was @ it's coolest. All four(4) cats are in place I live in California, NO headers yet, 91 octane fuel, as for the tech. questions you'll have to speak to Dan.


Quick;-)
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post #6 of 31 Old 12-16-2004, 10:20 AM
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i never had any luck on my built 94 v-10 truck with an intercooler/Novi 2000 combo. but with a Carroll alky/water spray system, i was able to run the boost up to 12psi with no detonation problems, and do not get the 2-3psi drop you will get with conventional intercoolers. i have it armed to come on at 8psi, so solution supply it not a real problem, unless i stay above 8psi for long periods of time, but i would run out of rubber before that happens
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post #7 of 31 Old 12-16-2004, 04:55 PM Thread Starter
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I talked to Dan Today, is very nice and knowledge guy, thanks for the contact, we agreed about many things, things I have stated in my previous post, he suggest the water spray system as well, sounds great as a bandaid for the real problem at the beggining, as my fellow friend said, the Novi/cooler combo, I will check tomorrow if we got knock sensors, Dan told me they were introduced on 2005 trucks. They insteresting thing is that the Paxton Diagram supplied with the kit for the ECU cable tapping was different than what we had in this truck. So I am still guessing this is a guinea pig at long distant for paxton.

We will put some more aditional knock sensor/air fuel ratio dataloging tomorrow then weŽll add a resistance to the water temp ntc sensor type, so the ecu wonŽt read anything beyond 200F and check for knocking pushing the truck.

In the end is a sad story, keep your money away from Paxton kits, or at least when they offer a real and completed Kit for Stable power!

I will come back tomorrow

Thanks

DJ
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post #8 of 31 Old 12-16-2004, 06:02 PM
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I installed one of the 1st kits. My dyno pulls ranged from a 1st pull of 622 rwhp next was 638.5 and the next was 628.5 all in less than 1/2 hr. I would make sure that the water pump for the intercooler is flowing correctly with no air in it. Then I would also check the temp of the water flowing thru the after cooler. The kit I got had a crap diagram the hose routing only because I had installed so many kits on vipers did I figure out how it was suppose to be routed. But your air intake temp doesn't look like it is climbing may be something else causing the loss.
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post #9 of 31 Old 12-16-2004, 07:28 PM Thread Starter
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Does anyone could give a precise diagram?

The system is an inline pump one, water flows in series,(deposit, pump, heat core, then back to deposit) is it totally important to check the water pump flow, and its flowing, as seen on the dyno pulls the IAT increase (normal on most supercharger systems) drops a 7-10%, but once we reach 200F it drops 25%!!

We will be still at it, tomorrow I will have more finding from our loggings on the dyno

Thanks for all the coments, BTW Mike did your water temp got beyon 200F on any of your pulls? that will be really interesting to share for me, what year model is your truck? knock sensors on that efi approach?

DJ
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post #10 of 31 Old 12-17-2004, 06:32 AM
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Quote:
Originally Posted by DJWR
Does anyone could give a precise diagram?

The system is an inline pump one, water flows in series,(deposit, pump, heat core, then back to deposit) is it totally important to check the water pump flow, and its flowing, as seen on the dyno pulls the IAT increase (normal on most supercharger systems) drops a 7-10%, but once we reach 200F it drops 25%!!

We will be still at it, tomorrow I will have more finding from our loggings on the dyno

Thanks for all the coments, BTW Mike did your water temp got beyon 200F on any of your pulls? that will be really interesting to share for me, what year model is your truck? knock sensors on that efi approach?

DJ
can you see what the timing is doing thru out the pull? the ecu may be changing the timing based upon tempature.-what is the program you have for the controller, maybe have one of us email you a different program, and install that into your piggy back controller. i believe you have a soft ware issue/timing
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