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Confirm what all has been done to my car, help solve the mysteries!

D

dblackston

New member
As the title states, I would like to enlist the help of fellow GP enthusiast to help me confirm what all has been done aftermarket wise to my 99 GTP based off of folder full of receipts and invoices. There are a few obvious parts and components that I can see clearly do match up to the paper work but needing help confirming the rest. I have a long list of what I was told has been done to the car along with a pile of paperwork...my issue I guess, is that for what all has been done to this GTP I expect more power out of it? It is quick for sure but being modded to the gills, figured it would damn near fly if wings were added. I would also like to know for repair/replacement instances and of coarse what all I can do or add as I can never leave well enough alone and seems like EVERYTHING has been done on this car already.

Can definitely upload better pictures if that helps as well.

Thanks in advance!!!

To start, here is a short list of what I was told is done as well as what I can see (sure I am forgetting or missing something):

Upgraded pulley for the supercharger (obviously not stock, but has no markings..any way to check size, is it as simple as measuring the diameter?)
MSD coils
Exhaust (receipts for both magnaflow mufflers and SLP? haven't yet looked under the car)
Headers (there is a sticker for TOG headers under the hood, anyway to confirm brand as did not find receipt)
Fuel/air chip (not hooked up currently but in the glove box as well as a receipt)
Baer Brakes
Intercooler (stage 2 zzp according to paper work)
PRJ Fuel rails (paper work says 42lb injectors, any way to confirm?)
BMR Braces front and rear
Fender braces
ZZP dog bones
alternator rewire kit
Python alarm system (key fob batt's are dead...might have remote start, anyone with experience here)

Below is a smaller list of what may be done but do not know how to confirm (also have been trying to track down original owner as I would love to pick his brain on the car)


-How can I determine if the car is indeed cammed? (paper work states zzp XP cam along with upgraded rockers, springs, ect)
-Any identifiers to let me know if it does have zzp aluminum heads as an invoice states?
-Found invoice also for DHP tuning...anyway to confirm, will the PCM have branding or markings?
-Upgraded gears (3.29 iirc)
-ZZP trans rebuild according to paper work (will this just be internals or with the case have any markings?)
-Meizer electric fuel pump (cant quite see at quick glance)
-Smaller tooth reluctor wheel (first...what does this do anyway and does it matter if it is there or not?)
-High velocity throttle body? found receipt only marking I find says "Hitachi" and seems to have a spacer?

Again sure there is more here that I am missing and is a lot, that is why I am asking for help even though I am asking alot. Thanks

Ps, something else I found odd...all this work and parts and no indication of a way to monitor KR? There are autometer boost, water temp and oil pressure gauges in the car so unless another gauge was mounted else where or it was monitor through tuning software (DHP?) I dont see how this may have been watched. Maybe he didn't with all the supporting mods to reduce KR (headers, inter cooler, ect)?
 
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Just measure the pulley, it looks really small like a 2.8 or 3.0.

MSD coils are worse than factory, many see problems.

If headers say TOGS, then they are TOGS. The other guys headers is the name.

Pull the injectors to really see what they are or read the part number off them.

A XP cam is going to have a lope to it at idle unless the idle rpm is really high. You'd have to remove it to see exactly what cam it is, they grind the specs into the cam on one end.

Aluminum heads are pretty easy to spot because they are aluminum. Factory cylinder heads are iron.

Electric water pumps have no pulley, so that's easy to spot.

Tuned computers with DHP use the factory computer still, there won't be any markings saying it was tuned with DHP. It will just have the GM sticker on it still.

With no scangauge to monitor the engine it's hard to say if this thing was even tuned right or running correctly.
 
looks like a 3.0. lets hope its not a zach howard tune. if it came from CO. that guys a total hack.

you need a way to scan for kr. t app, aeroforce, scangauge pick one.

only way to find out just what cam is installed is to pen the engine and see it.
 
Thank you both for the input so far. There is just a sticker that say "the other guys headers" and didnt see any marking on them yet. Any idea on where exactly to look? I guess brand actually doesn't matter all that much I just like to know for my own piece of mind and will keep looking. I have also read on the MSD coil failures and will probably pick up a set of OEM's for when these fail as I dont know if they would be worth selling due to known issues. Makes sense on the water pump and will look for a pulley. The idle seems a little high (if around 1000 rpm is high at idle) but seems smooth also no noticeable lope to it. I will clean up the heads to see what material they are made out of, currently dirty enough from possible valve cover gasket failure to not be able to tell at this time. I do plan on getting something to monitor KR soon as I know how important that is. In regards to a possible tune...would HP tuners be able to tell if the PCM has been flashed or altered? Thanks!
 
Yes, HP Tuner could see if it was tuned.

You'd either have to know what stock parameters look like or know stock numbers in certain tables or just find a stock 99 GTP file from the repository and compare it the file pulled off the computer. Then you could see anything that looks different than stock.
 


WarStryker13 said:
I'd get a fresh tune in it before you drive it too much, I would never trust an unknown tune.
Click to expand...

Was sort of my thought as well so I knew what exactly was in the car...Just not wanting to possibly waste either a dialed in tune or money...but do agree with not wanting to trust an unknown tune especially until I can monitor KR and a/f ratios. The car seems to run pretty smooth and strong with no noticeable hiccups as of yet but need to sort our the leaking tranny cooler lines first before running it around too much.
 
hp tuners works.

TOGS are headers, they replace the stock exhaust manifold. they are a good brand of header to have too.
 
Fivefingerdeathpunch said:
Yes, HP Tuner could see if it was tuned.

You'd either have to know what stock parameters look like or know stock numbers in certain tables or just find a stock 99 GTP file from the repository and compare it the file pulled off the computer. Then you could see anything that looks different than stock.
Click to expand...

Ok great thank you. I dont personally have HP tuners or the knowledge but know local LS guys that do who may be willing to take a look and I could probably locate a stock file and do the comparisons.
 
dblackston said:
Ok great thank you. I dont personally have HP tuners or the knowledge but know local LS guys that do who may be willing to take a look and I could probably locate a stock file and do the comparisons.
Click to expand...


hp will cost your friend credits to read your pcm. how they do it, you pay to unlock each car, or pay more and unlock a full year.
 
Scottydoggs said:
hp will cost your friend credits to read your pcm. how they do it, you pay to unlock each car, or pay more and unlock a full year.
Click to expand...

Actually.... they can read it for no cost. It's modifying the file / flashing that you need a license for. Scanning and reading is free if you have the equipment.
 


Nice, good to know. Might just end up trying to get a fresh tune to be on the safe side. If i can find someone who knows what they are doing.
 
fpr all you know its fine. only way to find out is to scan it for its long term fuel trims, timing and kr. if you have a droid phone and 15 bucks you can get the torque app. works as good as a dhp scanner. i got both, so i know first hand.
 
I do have Torque and an the bluetooth adapter but for what ever reason I can not get it register KR or Trans temp. Maybe because I have the Light version or incorrect PID's. I just did the predefined set for Pontiac and GM. I figured I'll just grab a scan gauge II and have it permanently in the car as well.

I also noticed something odd I havn't quite seen before and will upload a picture later if need be, but on the drivers side in the engine bay there is a "shock" mounted right next to the dog bone that is connected to the motor as well. Any one else ever see this and what would it be for? I assume as another motor type mount to limit movement...I have just never seen it before is all and thought it was odd.

Scottydoggs said:
fpr all you know its fine. only way to find out is to scan it for its long term fuel trims, timing and kr. if you have a droid phone and 15 bucks you can get the torque app. works as good as a dhp scanner. i got both, so i know first hand.
Click to expand...
 


I also noticed something odd I havn't quite seen before and will upload a picture later if need be, but on the drivers side in the engine bay there is a "shock" mounted right next to the dog bone that is connected to the motor as well. Any one else ever see this and what would it be for? I assume as another motor type mount to limit movement...I have just never seen it before is all and thought it was odd.[/QUOTE]

doesn't sound like something factory installed. pictures?
 
down load torque scan, its a free add on. after that you should see more pid's.

the pid's are listed alphabetically, kr is listed as knock retard.
 
You can see the mount for that shock thing in the photo posted, right between the dogbone mount and the diagonal brace...
 
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