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Why is my car slow? =(


90TGP
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I have a 90 TGP with the follow mods/upgrades/repairs/maintanece work.

 

Jeff M. TopGun 180 chip.

180* thermo.

K&N filter.

Taylor 8mm plug wires.

AC Delco plugs non-platinum.

MSD Blaster coils.

Jeff M. Cross-over.

FFP Underdrive pully w/shorter belt.

FFP Motor mounts.

DEI turbo blanket.

DEI intake tube cover kit.

Blitz Super Sound BOV.

2.5" exhaust from down-pipe back.

Magnaflow CarSound 2.5" in/out cat.

Dynomax 2.5" in/out bullet mufflers.

Nitto 555 Extreme ZR-Rated 235/45/17 tires.

17x7 wheels that weigh 17lbs a peice.

Oil changes every 3k with Mobil 1 filter.

Tranny fluid/filter/gasket changed.

Fuel filter replaced.

Fuel pump replaced.

Coolant flushed.

O2 sensor replaced.

 

Last year I ran a best of 15.09@89.64.

 

I went to the track last saturday in 80* weather and ran a best of 15.2@91.65.

 

Here are all of my timeslips since last year by date.

 

May 22, 2004 They sprayed VHT down that day.

60ft: 2.395

1/4: 15.242@91.65 Highest trap speed

 

60ft: 2.356

1/4: 15.317@90.91

 

60ft: 2.375

1/4: 15.346@91.09

 

60ft: 2.363

1/4: 15.589@89.29

 

60ft: 2.398

1/4: 15.426@90.73

 

September 26, 2003

60ft: 2.440

1/4: 15.434@88.41

 

60ft: 2.483

1/4: 15.937@89.64

 

60ft: 2.368

1/4: 15.319@88.93

 

60ft: 2.355

1/4: 15.339@88.58

 

September 10, 2003

60ft: 2.307

1/4: 15.139@89.64

 

60ft: 2.363

1/4: 15.245@89.29

 

60ft: 2.314

1/4: 15.150@89.46

 

60ft: 2.446

1/4: 15.660@91.28

 

60ft: 2.354

1/4: 15.164@89.64

 

60ft: 2.290 Best 60ft

1/4: 15.090@89.64 Best 1/4

 

Is there really that much difference between the 180 and 160 chips?

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First thing I would look at is your 60' times. They are pretty nasty. I would say between that and your trap speeds, you have a 14 second car, you just need to get it there. You have a 15.09 w/ a 2.4 second 60' time. :shock: I pull consistent 2.2's in the auto and have a PR of 15.21 You need to watch wheelspin, and launch RPM and boost. I would say that is what is keeping you in the 15's. HTH.

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what were the weather conditions while you were racing, temp, relative humidity, barometric pressure, those types of things? that can play a huge factor when you go to the extreme's, like one day 40 degreese, baro at 29" Hg and relative humidity at say 70% your car will run MUCH better then if you're at 90 degreese with the baro at 26" Hg, and a relative humidity of say 40% - just these slight differences can effect how your car will run.

 

--Dave.

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Why is your car so slow???

 

1) You go to a shitty track...going uphill at the end doesn't help

2) Your 60' times are REALLY horrible. You should be able to easily get them down another 2 tenths, which should give you like 3 tenths at the end. I have pulled numerous 2.0 60' times in my STE and our TGP.

3) Not sure about this, but you probably didn't hold the car in 2nd gear until about 6000-6100rpms. If you leave it in D and let it shift itself you will run 1-2 tenths slower.

4) It was 80 degrees outside. Heat is the worst thing for these cars. The colder the better. If it is possible where you are located, try to go to the track when it is like 50-60 degrees out...it will make a huge difference in the times you pull.

 

Also, I don't know if you brake torque at all at the line, but if you do only break torque for a split second. Otherwise the computer will figure out whats happening and lower your boost to save the tranny.

 

Hope that helps.

 

Shawn

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Well I made some new passes tonight. Weather was in the low 60s, high 50s.

 

May 28, 2004

60ft: 2.375

1/4: 15.095@93.17

 

60ft: 2.378

1/4: 15.315@93.36

 

60ft: 2.468

1/4: 15.538@92.78

 

60ft: 2.385

1/4: 15.768@91.09

 

I can deffinitly tell that my 60ft is holding me back :(

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You're right, I have to work on my launches.

 

Here's my 2nd problem, my track that I goto goes up hill in the last portion.

 

track15.jpg

 

wait wait...Ohio....that's the fucken quaker city dragway or some shit isn't it?!?! Someone needs to blow that track to smitherines or make it an aorport.

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yeah that tracks so bad curtis won't even race his car there! not even worth it for him since his times are about 1 sec slower there than any other track

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I just looked at your mods list, and shit man. You should be alot faster than that. I would think even a shitty 60' like your putting down you should catch-up. The 15.21 in my auto is ONLY TG160, X-over, filter EVERYTHING else is stock. That time was run while it was giving me shit. You need to drive to Muncie one Saturday, see how it really runs.

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Wheres Poland at? I haven't made it to the raceway yet, but theres one in Xenia, called Kil Kare Raceway. One of my buddies goes there, he really likes it.

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On other thing that *may* be holding you back.........

 

MSD ignition coils are pretty much SHIT.

 

I know of a number of GM FWD guys who have run SLOWER after they bought aftermarket coils..............

 

 

 

 

But I would say your 60ft times are the main culprit.

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I don't know about 3.1's, but I know on the L67's (supercharged 3800) the MSD coils don't help performance any, and they start giving trouble and fail often. I'm not sure that they hurt performance, but they definately don't help, and I wouldn't doubt it if they do hurt performance. I definately wouldn't buy them. Your stock coils are PLENTY. You can run like 10's with them. My dad has stock coils on his GTP and pulls 12.2's @ 115 with no problems. There is at least one person in the 10's with a GTP that runs stock coils...and most of them in the 11's do (if not all).

 

Shawn

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