ws6rufus

iTrader: (6)

Yes I did wait 6 months to receive my kit!!!

Yes it was a Pain in the *** to install!!!

YES THE WAIT AND HASSLES WERE WORTH IT!!!

Car Details.

1999 WS6 Trans Am Convertible 6 spd, 24,000 on car 2,500 on engine.

Stock 17 inch rims with Nitto Drag Radials @ 24psi.

Moser 9 inch with 3.50 gears, Detroit Locker, 31 spline axles, stock aluminum drive-shaft w/HD U-joints.

8.80:1 compression Balanced & Blueprinted 2002 LS6 block(stock 3.898 bore), Stock 3.622 stroke crankshaft, ARP Main & Head studs, Eagle H-beam 6.125 rods w/L19 ARP bolts, Diamond –8.6cc pistons w/Sealed Power rings, Ported LS6 Oil Pump, Rollmaster Double Roller Chain, Federal Mogul main bearings, Clevite rod bearings.

LS6 intake manifold, NGK TR6 plugs, MSD wires, Bauer Ported Throttle Body.

Competition Cams XER Lobes 226in/222ex, 0.551”in/0.558”ex 114LSA

TEA Stage 2 5.7L Heads with 73cc Combustion Chambers 2.02 in, 1.55 ex

Both a Catch-Can and Heavy Duty Check-Valve for the PCV system. Vapors go to the Catch-Can 1st then through the Check-Valve back to the intake. Valve cover fresh-air port has a small K&N breather and port on Throttle body is plugged.

Stock Fuel Regulator is removed from gas tank, CAS boost referenced Fuel Pressure regulator in place of the return line T, Stock Fuel lines for Feed & Return, ARE/Racetronix Dual Walbro in-tank 255 lph fuel pumps.(second pump activated @ 6psi of boost via boost management system), Speed Inc Billet Fuel Rails, Seimens 55lb(@43 psi) Hi-Z injectors.

Borla Cat-Back with McCord Electric Power Plate

Turbo-Smart e-boost Electronic Boost management System.

QMP single Turbo Tuner Kit w/PTE63 Turbo and the HKS Racing Blow-Off Valve option. IAT sensor relocated from Air-Cleaner to approx 6” in front of Throttle-body.

Dyno and Tuning details.

It was on the Dyno for 10 hours and we did 32 dyno pulls!!!!

Kennedy’s Dyno-Tune, Buffalo New York

Dyno-Jet with wideband O2 sensor in bung on down-pipe.

Sunoco Ultra 94 Premium Unleaded Pump Gas!!!!

Air Temp 75-80 degrees

Air temp max increase 55-60 degrees F from ambient on every dyno pull (using large fans directed at front of car).

Air-Fuel ratio 12.0:1-12.2:1

Timing 28 degrees from 2400-4000rpm, 25degrees from 4400-5200rpm, 27 degrees from 5600rpm and up.

ZERO Knock retard!!!

Dyno pulls started @ 2400 in 4th gear full boost (15 psi)was achieved @ 3400 rpm. Maintained 15psi from 3400-3700rpm dropped to 14 psi from 3700-4500 rpm. After 4500 rpm there was a linear drop in boost from 14psi to 10psi @ 6000 rpm and it stayed @ 10psi till shut-down @ 6500rpm.

The Results (I don’t have the ability to post the graphs)

With the McCord Power Plate in the open position.

572.7 Horsepower @ 5000 rpm & 711.1 ft/lbs of torque @ 3500 rpm

We then did a dyno pull with the McCord Power Plate fully closed(where I normally have it except when at the track)and lost about 20 horsepower and 30 ft/lbs of torque but the Air/Fuel also dropped down to 11:1.
We then took 4% fuel out of the Power Enrichment/RPM table from 2800rpm and up to return to a 12:1 A/F ratio and dynoed again.

563.8 Horsepower@ 4900 rpm & 717.8 ft/lbs of torque @ 3800 rpm


Lost 9 horsepower but gained 7 ft/lbs of torque.

Based on the boost curve my guess is we maxxed out the Turbo @ 4500 rpm, but the thing that was odd is the boost would drop in a similar fashion but not as drastic (2-3 lbs from 4500-6000 rpm) even on dyno pulls where we had the max boost set @ only 10 psi. Anybody have any ideas on this?

It took several months to get all the bugs out of the Turbo kit and the associated upgrades but I can honestly say it does now idle and drive almost like it is stock until I put the pedal to the floor.

The only issue I still have is the #1 cylinder primary on the Turbo manifold has a very small leak, which has been leaking since day one. I will remove the manifold and send it back to QMP over the winter to be repaired.

I may contact QMP/Precision to see how much they will give me for the T63 for a trade up to a larger turbo but I honestly think I will just stick with the T63. My main goal is to keep the car street-able, track times are less important to me.

Pro Stock John

iTrader: (34)

Great detailed post!

So with the cutout closed the car ran a lot richer? Where your cutout located?

ws6rufus

iTrader: (6)

John,
It is a electric plate(controlled from the ****-pit) that is bolted in place of the plates you normally would use with a Borla exhaust. It is located in the pipe right after it bends over the axle and gives you the option to let the exhaust flow free through the passenger tail-pipe or through the muffler and out the drivers side tail pipe. Yes it probably would have made a little more power it I had a true cut-out placed much closer to the down pipe.

FYI we lost power when we both decreased and increased timing from the value I have listed.

I did have one dyno pull that was @ approx 13:1 A/F(NOT SAFE) and we got 589 horsepower and 768 ft/lbs torque

Pro Stock John

iTrader: (34)

12:1 on the dyno is like 13:1 on the track right?

Interesting how you can run all that timing.

Very cool how you went that low on compression.

KraZy

iTrader: (4)

Awesome!

I am really envious!

Hows all that torque feel??

ws6rufus

iTrader: (6)

John,
I honestly dont know if 12:1 on the dyno = 13:1 @ the track. The tuner(who is very good and generally conservative) said 12:1 on the dyno = SAFE on the road especially since my fuel system was working flawlessly and adding fuel with boost and I was seeing 0 zero knock retard.

y2khawk

iTrader: (5)

Your out of turbo

you can get the bigger boost numbers down low because the flow into the motor is still below the choke point on the turbo. Basically over exagerating the torque down low, but tapering off as you hit the flow limit of the turbo.

A bigger turbo will allow you to maintain the boost and fill in the upper end power.

Same deal i ran into on the Incon setup, peak down low at 18 to 19 psi, then it would fall to 15 as the turbos began to choke.

I won't have that problem anymore

ws6rufus

iTrader: (6)

Thanks for the input Harlan!!!(and thanks for the advice you gave me over the winter when I was putting the motor together.) Do you have any input on PSJ question about AFR on the dyno vs the track?
I think I'll try to figure out how to handle 575hp/710tq before I consider getting a bigger turbo. Thats the nice thing about the QMP kit, I can directly bolt in up to a T76. Any guess on how much power It would have made if I would have had a turbo large enough to maitain the 15lbs of boost above 4500 rpm? Anybody want to host the graphs if I email them to you? I made 32 dyno pulls and the car performed flawlessly. Dyno operator said If I had a supercharger I probably would have tossed or broke 4 belts by the 32nd pull.

MIGHTYMOUSE

iTrader: (59)

harlan, that turbo is rated at 745 flywheel, did precision rate it incorrectly?

ws6rufus, mine also did the exact same thing with that turbo, i made 523rwhp and 720 tq on 93 octane with stage 1 heads. if you would like to know why i think it does this then please email me.

good job! get it to the track.

y2khawk

iTrader: (5)

Out of turbo may not mean on the compressor side. It could be choked on the exhaust housing side. Or your choking it on the inlet track. Could be a multitude of things.

Hold the boost to 15 and 700/700 is a good bet. But you will have to drop that advance a good bit if you plan to stay on pump gas, with sub 9:1 CR you can do it

As for A/F, i don't know. I'm always the same on both, but it's the other kinda dyno

Your boost change on the street versus the dyno? Curious how the controller is, cause with a good controller you should be able to hold the same boost on both. Same boost will give you the same airflow and AF. Or in theory it should

MIGHTYMOUSE

iTrader: (59)

choked on the exhaust housing side.. yep thats what i'd go with

1dirtyZ

iTrader: (1)

nice numbers! how much do you think that low compression changed the cars strret manners?

note: 39 pulls in one session and 4 months on the same belt.

MYTURBOT/A

I also had the same boost loss problem. I fixed it by moving the wastgate boost signal from the compressor to the intake. because as intake temps rise under boost you`ll start seeing a pressure drop after the intercooler so the boost pressure is a few psi less at the motor but the wastgate is still seeing the full boost at the compressor.

XLR8NSS

iTrader: (4)

Interesting info.

Pro Stock John

iTrader: (34)

Having talked to folks about the AF including Jonathan @ QMP, usually we are a full pt more lean on the track. Has to do with load. I think some might reccomend adding 5% more fuel if you are at 12:1 on the dyno, but just call them and reconfirm that.

Sweet numbers, I'd play with that for now, and crank off some mid 10's and then swap the turbo.

MYTURBOT/A

I`m also amazed how much timing your able to run with that much boost and pump gas. I`ve noticed alot of the big FI cars on here run alot of timing how do you guys do it? I`m @ 9.1:1 comp. and 7psi, I can only get 16* out of mine is there any tricks or secrets that i`m not aware of. please teach me oh great FI gods

Krazy98Z28

iTrader: (12)

98's have a false knock problem are you getting 3.9* of knock ??

y2khawk

iTrader: (5)

Anyone know the A/R on the turbine side of that T63?? I'd be curious, might answer a few questions.

FWIW, boost response is typically quicker as you move the wastegate reference closer to the port.

cablebandit

iTrader: (37)

Man that is AWESOME! You are probably out of turbo. Did you see the same boost on the street that you did on the dyno with no adjustments? On a dynojet, I always tuned to 11.5 ish a/f ratio. Let us know how it does on the street. I am impressed you are able to run that kind of timing.

MYTURBOT/A

I was getting 3.9 I replaced the sensors with new style, installed resistors in the wires going to the pcm, vented my pcv system to atmosphere and installed a oil restrictor in the feed line to the turbo and droped the boost back to 7psi from 10psi and now i only get an occasional 1-3* kr with 15* timing @ peak TQ 3200rpm, ramping up to 17* @ 5600rpm runs pretty decent now but still not making the power it should IMO.