0-60 Acceleration in 8 seconds....?????

[CRiXman]

Hey Guys & Gals,

I just received a GTECH Pro SS I ordered. I did a few test runs from 0-60 and got results in the 8.2/8.3 seconds.. (this confirms the stopwatch readings I was getting before the GTECH). I know a stock 96 GSX is supposed to do a 0-60 in like 6.5 seconds.
Could this be a result of a boost leak (this is my first turbo car)???

What do I feel when I accelerate??? Well:

For the sounds: I can hear a slight whistling noise as I accelerate. I have been thinking this is just the turbo spooling up? Is this correct or am I hearing a leak?

For the feeling: First gear is great, the acceleration feels almost rocket like. but from the second gear on-wards, it pulls but much less than the first gear, (not enough for my taste). Same for third... <--- This diagnosis is during a 'heavy' acceleration. However... if I am driving calmly and I am on 2nd gear, and suddenly I want to accelerate the Car pulls significantly harder than it does on on 2nd gear during 'heavy' acceleration. Is this a typical boost leak?

Also for your info on how I launch.. I rev up-to around 3.5k - 4k during stand still and then let go of the clutch slowly giving gas and shift gears at around 5.5k..

..For the moment I am completely stock, no gauges even...

I would really appreciate if someone could gimme some expert advise!

Thanks!

C.

 

[CRiXman]

I took pictures of one of the runs I did, from the GTECH results:

This one I did 0-60 in 8.36 seconds...

Notice the acceleration on 1st is ok.. the graph shows a steep line. its after the shift to second where it is slower (line not as steep)..

So is this a result of a boost leak? Or something else?

Thanks

C.

 

[andymoraitis]

The reason you're seeing such high 0-60 times has to relate to your shift points. While we agree that the T25 runs out of steam very quickly it's just as important, when shifting, to try and get the car to point in the NEXT gear where it will pull. I would change your shift points so that you're running first to 6500 and do the same with second. I know on my GSX that I'm not running a 0-60 in the first three gears, but only the first two.

Also, the whistling noise you hear is likely the turbo spooling up, but it would be a great idea to buy/make a boost leak tester and check the system under pressure.

Try that and let us know how it worked and don't be afraid to experiment and see what the car likes since they're all a little different.

Andy

P.S. Those new wheels are pretty!

 

[paranoidTSi]

3rd gear should be pretty crappy, but 2nd should not..are you taking it high enough to where when you shift into 2nd you don't lose boost?

 

[Defiant]

Okay, old fart chiming in, as usual.

Give up on finding the fast 0-60 times. Leave that to the magazines who are driving borrowed cars that they'll never see again, with clutches they'll never have to pay to replace. You're going to have a year or two with your DSM, give it the chance to live it out.

Oh, and those magazine test cars aren't ten years old, either.

You'd also have a slight gain in going to 60mph instead of 63, too.

 

[CRiXman]

Thanks for the feedback everyone!

Andy thanks for the compliment! (but actually these 18 rims are probably slowing me down a bit to... )

Also I shall try doing the 0-60 in one shift instead of two, and see if that works. It will be interesting to see the results on the GTECH with only two shifts..

Defiant, thanks for the note.. true that 100km/h does not equal 60mph..

The reason why I refer to the 0-60 is because here in switzerland we don't have any drag strips, and this is the only statistic which I could relate to.. Now having the Gtech I might be able to get an Idea of the 1/4 mile... (I think I did it in 15.9 @ 155ish.. not sure..)

I will try shifting at around 6.5 k and post the results.

Thanks again!

C.

 

[Talnz167]

Are you considering the rollout distance/ time that needs to be subtracted from your overall time?

 

[1998gstspyder]

its because your driving is not superior like the pro drivers in the magazines. also that unit you have, I've heard its not very accurate. and you have 18s? that would make a difference too

 

[25psi]

You mentioned Switzerland, what is your altitude?

 

[CRiXman]

You mentioned Switzerland, what is your altitude?

I am at around 400 - 450 metres above sea level, which in feet I think is around 1312 - 1476 feet.

Does this really matter? Is this altitude significant enough for a change of air density? Hence loss of performance???

 

[25psi]

I am at around 400 - 450 metres above sea level, which in feet I think is around 1312 - 1476 feet.

Does this really matter? Is this altitude significant enough for a change of air density? Hence loss of performance???

Yes, the higher the altitude the less dense the air is, meaning your engine has less oxygen available. On a turbo car altitude isn't as much a factor but will still slow you down some.

 

[andymoraitis]

Yes, the higher the altitude the less dense the air is, meaning your engine has less oxygen available. On a turbo car altitude isn't as much a factor but will still slow you down some.

Now that's a darn good point that I didn't even think about. Either way, let us know how those 6.5k shift work out and don't worry about getting the most amazing 0-60 times. As long as your car feels fast to you, that's what counts.

Let us know how it goes!

Andy