new G-tech numbers in and very disaponted

[doom26464]

well I got my G-tech pro in today finally. Well first was so excited to test it out but found out my cig lighter never worked. So after an afternoon of wiring and saudering I maganged to fix that. So I g-teched my car and this was what I got for a best time out of like 4 runs:

0-60:8.5 seconds
1/4 mile : 16.7@ 90mph
hp: 137

Thoses numbers seem like shit to me and I though supra run low 15's stock and mine isn't even stock. MY mods are:
-3 inch downpipe
-2.5 inch catback with no resonators or cats
-K&n filter
-wastgate shimmed with 2 washers

Im very disaponted and confused i dunno wtf is wrong. Also my boost seems to not pull as hard as certain days and today was one of thoses days. So mabye I will try it again when the boost isn't acting all gay.

Also tried some other cars out
my friends 1987 non turbo mazda rx-7:
0-60:7.9
1/4 mile: 16.5 @ 85 mph
hp:97
(He ran a better time then me in his non turbo rx-7 very sad :3d_frown: )

2004 honda CRV:
1/4 mile: 17@79 mph
hp: 107

 

[PynkEye]

Hmmm heard those G-tech werent all that precise so I wouldnt rely on that. Are all your codes clear ???

Turbos are suppose to run high 15s stock..not low. 15.6 to be exact

 

[mkIIIman089]

Car and driver ran an 87 turbo @ 15.0 flat. Obviously thats bone stock.

And contrary to you PynkEye, I have heard that the G-tech are very accurate for everything besides HP, in which they read high.

I don't know what to tell ya about those #'s though...

 

[billspreston01]

and I've heard they're inaccurate in the mph on the 1/4 runs because at a real track they take the average of the last 60 or 120 feet of the run

 

[lagged]

go run at the track and then be upset. its probably a good chance that that thing IS accurate.

dont blame the supra for either a worn out motor, poor driving, or a combination of the two.

 

[ma71supraturbo]

I don't understand how people say they are accurate for time but not for hp. The hp figures are calculated by the weight and acceleration. Sure if you have an aggressive clutch and slam it hard into the next gear, you might get a bad peak reading, but as long as you roll on the throttle smoothly and accurately imput the weight -- I've found them to be reasonably accurate

 

[Mk3 TurboS]

mmmmm well first up is it a manual or Auto? did you spin the hell out of the tyres? do you have good tyres? Was it slightly up hill?

Second you should stop choking the car with a 2.5" after the 3"

Third have a run against your mate in the rx7, See if hes car is actually faster, then you can blame the G-tech

Fourth, do you know anyone who has a time slip? chuck it in there car see how close it is. :drink1:

 

[doom26464]

well I'll try some new runs with the car. Also engine could use a tune up mabye(new spark plugs, oil change etc.) but i doubt it is worn out it is a jdm engine. I have shit for tires they are blizzak winter tires on. But I will try again later this week and c what happens. And so far with the cars we have test drove it has been very accurate. We test drove my friends 91 honda civic:

0-60: 10 seconds
1/4mile: 17.8@ 77 mph
hp: 87

 

[JohnnyGTS]

well I got my G-tech pro

I found your problem

 

[doom26464]

I found your problem

:umno: :wtf:

 

[RacerXJ220]

The unit gets freaked out by turbos. That's why the mph/hp is whack. Or at least it was on mine. Time was actually somewhat decent, within three tenths pretty consistently.

I say you need a tune up, or you may not have as much compression as you think you do.

With intake, no cats, cat back, and a MBC, I ran a 14.1@97. You should at least be in the low 15's with those mods that you say you have.

 

[albertmdh]

a few months back car and driver compared all the in-car perfomance meter things, find the article, read, i think you have to calibrate it with 3 1/4 mile slips, or something.

 

[americanjebus]

ok dude i know what your issue is so read
i use the passport G-timer but same f%$king difference,

first set the damn thing to your cars exact specifications, weight is pretty huge factor i hope you set it to your cars closest weight, read your manual, it has allot of different settings that need to be set, like hp lost through tranny your manual will have the setting for a 5spd, also your wind resistance factor (you figure this out by going 60 on the highway and letting go of the gas, you time how long it takes for your car to slow down to 40 you use that time and your manual should tell you waht value to enter to calculate your wind resistance,) set your rolling start is it at 12'' or 6'' it has a HUGE difference, i changed my values from 12'' to 0 and i lost a second. make sure you set it according to what it says is the standard track measurement.

calibrate the thing when its in your car, i dont know about this being a factor in your car but dont put it next to any large speekers or magnets. just go through every setting your manual has and set it to your cars specifications.

i did a flat run uncalibrated and unset on my car and i got a 17 sec 1/4 mile and 0-60 in like 9 seconds,

when i set it up all nice and sweet i got 14.9 with 0-60 in like 6. and 224 wheel hp.

after you do all the details and you stil get crappy times, well maybe you just need to learn how to shift. happy tuning.

 

[encomiast]

Agreed.
A buddy of mine has one of those things, and I once had the opportunity to play around with it. It's very important to enter the correct weight; with a full gas tank plus you as the driver, your car is actually quite a bit heavier than the vehicle weight Toyota stated in the manual.
Another very important thing is to keep the G-Tech absolutely level at all times or gravity will screw up your results. How to do that is described in the manual.
I also experienced that the cable tends to tilt the unit during launch because of its intertia, so make sure that this doesn't happen to you.
Next, make sure you are accelerating long enough for the G-Tech to finish all measurements. IIRC, you have to accelerate from a stand still to about 100 mph or so to get meaningful results, this is also described in the manual...

Good luck

 

[doom26464]

Agreed.
A buddy of mine has one of those things, and I once had the opportunity to play around with it. It's very important to enter the correct weight; with a full gas tank plus you as the driver, your car is actually quite a bit heavier than the vehicle weight Toyota stated in the manual.
Another very important thing is to keep the G-Tech absolutely level at all times or gravity will screw up your results. How to do that is described in the manual.
I also experienced that the cable tends to tilt the unit during launch because of its intertia, so make sure that this doesn't happen to you.
Next, make sure you are accelerating long enough for the G-Tech to finish all measurements. IIRC, you have to accelerate from a stand still to about 100 mph or so to get meaningful results, this is also described in the manual...

Good luck

yes I have wieghed it and leveled it correctly.

well I did another couple runs today and the best I could do was 16.05@91mph

This was before the car managed to heat up. I noticed once the car has heated up it runs like shit and doesn't go very well. Also when I got back and poped the hood I could hear my raditor sizzling and steam was coming out of the resvior. I figure it might be low on fluid so im goign to top it up here soon and then c how she runs. DO u think that this could be the causes of my car running like this and such low times???

 

[americanjebus]

I figure it might be low on fluid so im goign to top it up here soon and then c how she runs. DO u think that this could be the causes of my car running like this and such low times???

i think the previous owner is the reason this car is running such low times, how much have you taken appart in the engine bay. have you dont a compression test? my geuss is theres more wrong with your car than you know. as in previous owner may have been a moron at driving.

 

[doom26464]

i think the previous owner is the reason this car is running such low times, how much have you taken appart in the engine bay. have you dont a compression test? my geuss is theres more wrong with your car than you know. as in previous owner may have been a moron at driving.

mabye. I just toped off the coolant And The oil was a bit low too so I add another litre of that too. Also she is probaly due for a good oil change and I have been meaning to get some new spark plugs and wires.

 

[doom26464]

tossed a litre of oil in and top off the coolant then went for another run. I ran a 15.77@89.7 mph. Still not low 15's but im slowly getting closer. I will mabye run again once I get my oil changed and top off my tranny fluid and fix the tranny leak. Hopefully I can get low 15's or break into the 14's even.

 

[Mk3 TurboS]

Personally and this is just personally, I would not be doing all these hard pulls until I had all your little problems sorted out. Oil, water, tranny, compression test, plugs, brake fluids, the works. To me it sounds like there is another factor to the slow times. I would NEVER do any 1/4 runs continuously if my car was not perfectly running. I was supposed to get mine dynoed about 1month ago but I didn;t cause shee was blowing a little smoke. Now Iv'e fixed the problem ill get it done. :drink1:

 

[doom26464]

Personally and this is just personally, I would not be doing all these hard pulls until I had all your little problems sorted out. Oil, water, tranny, compression test, plugs, brake fluids, the works. To me it sounds like there is another factor to the slow times. I would NEVER do any 1/4 runs continuously if my car was not perfectly running. I was supposed to get mine dynoed about 1month ago but I didn;t cause shee was blowing a little smoke. Now Iv'e fixed the problem ill get it done. :drink1:

your probaly right the car is probaly in need of a good tune up on it. New spark plugs and wires would be a good guess for me becauses as soon as I hit maxium boost it doesn't pull very hard like it used too. Also timming could be another thing but im not too sure on that one. All I want is to rember the feel when I first floored The strong pull of the boost and the front end lifting up seems to have all disappered. Im assuming this is the cause of my shit times. Sad part is I can't seem to do any of this right now as I got laid off from my last job so im unemployed and broke. Its hard owning a supra when your poor :cry: . though hopefully I should have another full time job here soon and some unemployment cheques. Good thing is I just graduated this year so I live at home and have no living expensive. every penny I earn goes into the supra. Though I should start saving money to go to school next year I just can't damn supra and being so damn addicting.

EDIT: after posting this thread 5 minutes later I get a phone call and now im Hired at the DQ at full time with 7.50 an hour BAMM!! looks like the supra will be getting its much needed attention.