im so pist i cant understand why this car is so slow i just put new tires on and took it out with the gtech and it ses im running 16.7@85.3mph thats sorry for L98 with some mods i just dont get it im gonna sell this thing soon.sorry for rambling is it possible enigine is just tired? it doesnt even smoke though it has a 114,000 miles it still should be faster i just diconnedted the knock sensor to see if any change and notta same old slow gta does anyone have any idea what to do? it runs good timing is good just dont know what to look for next except another car.

 

With that kinda mileage, I'd do a compression test on the engine, even if it doesn't smoke.

 

Are you at a high altitude? Have you considered the fact that your Gtech may not be very accurate? Don't despair, try to get to a real drag strip and see how it performs before you do anything rash, like sell a good car.

 

i know your right its actually a great car i have done alot of work and it runs great i just get so frustrated but i was just blowing off some steam i will never sell my gta i love that car im just gonna have to wait and see what happens at the track and if its slow i will have to save for a new motor thanks dude. License No.


Description of Work
new brakes
air foil
under drive pulleys
b&m shift kit
flow master muffler
400 h.p. fuel pump
bbk fuel presure regulator
timing advanced to 10*btdc
hollowed out cat
new 2 1/2 ex. pipe
new mass air meter
new computer
new ignition module
new plugs
polly graphite trany mount
new m.a.f. relay
ported upper plenum
a.i.r removed
160,fan switch
180,thermostat
high performance ignition
homemade air induction

 

Gtech's arent always that accurate especially if the road isn't completely flat or smooth. Any other variables that you know of where you were testing?

 

your really not going to see much untill you start modding. None of the present mods you did really help the car to go faster. First off, id ditch the exaust in favor of headers and a good 3 inch cat back system and a better cam. How much you want and what the car can support are up to you to decide but a slightly more aggressive cam along with a custom prom really helps. Youll probably also want to look into gears if your car came with the numerically low ratio set of gears. Traction is also important. A good posi unit and some suspention work will really help it get moving without leaving a whole bunch of tread behind... I know i need some traction mods. Being able to do power slides and doughnuts at the mere flick of my right foot is fun but it really does nothing to help the car get going in a hurry.

 

Are you serious? :sillylol: You can't expect to have a 13 second car with only some minor bolt on's....if your serious about a fast car get off your *** and start working! a cam, headers and ported heads do wonders

 

first of all i dont believe the gtech anymore and yes im serious i know i cant exspect a 13 second car from what i have done im not stupid but i should be in the upper 14s but if im in the 16s you want me to spend money on a cam heads and headers so i can run in the 15s i dont think so. if the gtech is right and i dont think it is because last time i used it i ran a 15.@93 and now i did the cold air and ignition and it ses 16.7 i dont buy it i have to go to the track and find out but if i do find that it is true im gonna have to get the mtor redone with cam,ported heads,diffrent intake and so on.

 

learn a little more about motors and suspension or you'll end up burning a hole into your pocket... seriously or you might want to find another hobby

 

what is this the insult board i understand how motors work and i know that my car should run better than 16s with a 350 ok 305 runs 16s easy so maybe you need to learn a little more.somtimes people just dont have the money to do the things they want to their cars so we do what we can with what we have.do me a favor and give me some good advice if you dont have anything good to say dont say anything at all.

 

Just because it is a 350 does not mean it is a performance or really fast motor! There are 305 that put out more power than a 350. I put a 350 in my Z28 and the 305 that was original was faster. It just depends on the setup and what you have on there!

 

My old 86TA w/ 305 TPI and 120k miles ran 17.0 bone stock.

 

Your off to a sorta good start with what you have done, from the looks of what you listed you have done maintenance not go fast parts.

Do a compression test, make sure your rings are all good.

First of the plenum porting is good, but you should port match your runners and base and TB that will allow for some good airflow.

Second the exhaust you have on there is a nice upgrade for a V6 car, you need atleast a 3" intermediate pipe with appropriate 3" muffler from flowmaster if you so choose. Good 3" catback would be your first stop for what money you have to spend.

Once you have the entire intake matched up, if you want to get aggressive, pull the heads and port them and match them up.

All the porting is free with a good grinder.

next if you don't have the money or don't want to get into a cam swap, I would investe in suspension, a good set of LCAs and panhard will go along way. Also a Torque Arm, but only if that is in your budget.

I would get headers next, a good 1 3/4" header, slp's is good.

IF you do decide to do the head work you could do the cam at the same time as you would want to replace your seals and springs and it would be easiest at that time.

Also take the car to a weigh scale equal mods in a 3400 pound IROC will result better time thn in a 3600+ GTA

If you need anymore help on combos and so on, do a search, there are alot of 350 combo's for you to choose from.

 

1987gt why don't you just come race me sometime? and if you completely destroy me like a l98 should then we can say that ur car is running right, and if it's a close match then there really is something wrong with ur engine. just a thought for ya

 

16.3@87is what my 89 iroc runs at with a 305pti, then after replacing many broken parts-

235/60r15 ta radials
cross drilled rotors
new claipers and pads
new wheel cylinders and shoes along with the drums
s/s braided brake lines
3" mid section on the catback
new muffler and 2.5" tailpipes
slp 1le- lca's, panhard rod,trany and motormounts
alternator
water pump
MSD 8.5mm super conductor wires/gm blatser coil/cap and rotor
ngk irdium ix plugs- don't spend 7.50 a plug like i did
raditor and hoses
new septrinebelt
air foil
K+N's +gutted airboxs
new modifed MAf
new rear w/ 3.43 gears-1250 right here
l98 cam
many more stuff has all bought m into the 8000 range with my camaro.
try that gtech again, on the same road in the same conditions that u did it when u ran the 15@93

 

hey that sounds like a good idea what are you doin this weekend maybe i will take a trip down and see what the deal is. i raced my friend in his lincoln mark VIII i got him real good off the line but he started catching up but i would have taken him in the 1/4.but the other day i had 2 firends in the car and a toyota celica gt newer one was on my *** and i couldnt loose and he passed me but thats alot of weight in my car so who knows.i havent had chance to race off the line yet except my friends lincoln.anyway tell me iif you will be around and i will come down and race you.

 

heh, i can do something on saturday if you wanna race me.

 

Yeah I think you are off to a good start. Keep the car running in good repair and make modifications slowly. Try to get to the track before any major upgrade to track performance increases. Also NOW is the best time for you to learn to burn and tune your own EPROMs. With a stock or littly moded motor you can learn the basic stuff and work with some other table to get used to how it all works. In the mean time you may find some speed, mileage, drivablity, whatever. Then once you save some cash to put into the car, you can get the most amount of performance potential. I agree with the others about your exhaust. Get some bigger pipes, 3" at least.

 

i think i will come down saturday hers a # you can reach me at in poughkeepsie 845-471-4903.give me your # and i will call you friday to tell when and if im coming and what time.

i think you guys are right i need a 3" exhaust can i just throw a 3"intermidiate pipe on i have a flowmaster muffler allready.will it bolt up to my cat converter? my car came with a 2 1/4 inch inter pipe believe it or not i put the 2 1/2" one on.

 

No flame intended mate! I'm just trying to convince you to keep you gta and be a happy little 3rd gen **** If I were you I'd start by scavenging the junkyards for a 350 block, and basically just build up from there... I'm not sure if you want to keep efi or go with a carb. but TPI can be good for up to about 300 some odd hp... with lots of modification..... so if you wanna go more with it i'd recommend something like a stealth ram or LT1...... all of this after of course you build the 350

 

sounds like a good deal, my numbers 845-298-2845, dunno what time i'm gonna be home on friday, so if i'm not there leave a message for me... my names Eric. if u leave a message just tell me a time and place to meat you(don't mention racing, the parents will get mad lol).

BTW: if you get 3 inch pipes... i'd be willing to buy the 2.5 inch ones off you if their in decent shape

 

this is for dansbird - its cool man i just thought you where ragin on me i hate it when i ask for some advice and people start talkin nonsense im gonna keep the car and im gonna get 400 hp out of the fuel injection but your right i think i want that holly intake.

ok eric my name is rick i will leave a messege you can call me back at 518-622-2996 if you want we will set up a time and place maybe we will meet at dunkins i will talk to you later.oh i will make sure to mention that we are going raceing on the machine lol.just kidding dont want my girlfriend to know either dont wanna here her mouth lol later dude.

 

is there a 1/4 mile track in poughkeepsie, or ner by cause me and a couple friends head up that way every now and then we go to the track for the reionals(gocart track that is), its a nice track exepct for when it rains and u spin and start rolling back into a lake(its happened)

 

no sorry their is no 1/4 mile track in poughkeepsie.you have to go to lebanon valley about a hour from poughkeepsie thats whare im gonna go this summer.

 

yea i'm going up there too this summer. i'm prolly going with my friends cousin, he has a 800+ hp supra, i think it's a 89. i gotta see what that bad boy runs. and of course i wanna get some times outta my car too.

 

An mine does 16.4 @ 86MPH 715' ASL, bone stock. And that's with 2.77 gears, spare, subwoofer, 3/4 tank of fuel, etc. (street trim). That's a little slow for an L98 unless yor altitude is quite a bit higher or the temperature is very high.

The AFPR, cooler fan settings and t-stat, and advanced timing should have helped a little if the adjustments were done correctly. The underdrives and air foil probably didn't help or hurt either way.

 

its funny that you should post this, i was just thinking this same concept in my head.....have you checked to make sure that it is really a 350? maybe the previous owner(assuming you arent the first owner) had problems with the 350 and swappe d in a 305?

 

With the stuff you have done you should be in the 14's easy. A stock L98 Camaro routinely runs in the 14's-low 15's. First off junk that crappy G-tech, check your timing, and look over everything. Do a compression check and if everything checks out, you just keep searching. No need to buy headers, cam to get into the 14's, just go and check obvious things first, plugs, timing, sensors, ETC. Hell my old '92 Z28 L98 with 158,000 miles on it still ran a 14.9 stock.

 

well i think i made a mistake first of all i was running 15.3@93 before i did the cold air intake and ignition but i moved the TV cable back to see what it did and i never put it back whare it i think that is one problem it took to lo9ng to shift i have to move it back whare it was and try again i think i can run 15.0 flat or so even know thats not great its better than 16s.its snowing right now so i will have to wait.my plugs,timing and wires and everything else is in perfect shape i check it everyday im sure of that and evrything is new.

 

i have basic mods and im in the thirteens, no reason u shouldnt be.

 

if your running 13.9 on a 305 tpi than something is definitly wrong with my engine?

 

What are your mods?

 

new brakes
air foil
under drive pulleys
b&m shift kit
flow master muffler
400 h.p. fuel pump
bbk fuel presure regulator set @45lbs
timing advanced to 10*btdc
hollowed out cat
new 2 1/2 ex. pipe
new mass air meter
new computer
new ignition module
new plugs
polly graphite trany mount
new m.a.f. relay
ported upper plenum
a.i.r removed/spare tire and jack removed
160,fan switch
180,thermostat
high performance ignition
homemade air induction

this is a list of alot of things not all to do with performance but i put them in anyway.

 

vehicle weight with driver 3350 with a 1/4 tank of fuel

hollowed cat
emissions delete
A/C delete
throttle body coolant bypass
cut the bottoms off the air box
manifold air temperature sensor relocated to the air box cover
160 stat, manual control dual fans
dynomax super turbo exhaust
dynomax headers
headman Y pipe 2.25 to 2.50
ported plenum
ac delco plugs
centerforce dual friction clutch
energy suspension torque arm bushing
energy suspension tranny mount
9 bolt with 3.27 gears (not run at the track yet)
pbr rear calipers and 11.86 rotors

 

looks like ur on the right path with ur mods u got, keepin it simple and it appears u havent wasted ur money on **** u dont need. hmm i wouldnt really trust a g tech pro personally, definitly take it to the track, ull be in the 14s i bet, now all u need is some suspension work to get u to the 13s

 

thanks due i hope your right about the 14s the suspension i do plan on doing.the car does scream thats why i done know why i am getting ****ty times and thats in cold weather what happens when i gets hot out and my cay still runs hot after the 180thermo and 160 fan switch this car is gonna be in the 16s.

 

The gutted cat may actually be hurting him, reversion within the cat slowing down exhaust scavenging.

 

Is it a 305 or 350? If its a 305, then that doesnt surprise me al lthat much. And if its a 350, maybe you should make sure its a 350 :P

 

take it to the track man, dont rely on a g tech pro.