New mods - slower car!
Thread Starter
Racer
Joined: Sep 2000
Posts: 337
Likes: 0
New mods - slower car!
This weekend I attended the Club Corvette Sweden championship. We had both dragracing and roadracing. My car felt strong and performed well in the roadracing. I got stuck in the traffic though and I really need new brakes (Brembo). :smash:
Last year I ran 13.91 at the same track. During the winter I installed a Shift Kit from B&M and the car felt faster. During this spring I installed a pair of Flowmaster Afterburner at the rear of my dual 3” exhaust system. Before this all I had was a pair of catalytic converters and the rest was just straight pipes. The car didn’t felt any slower with the mufflers on than without (nor any more silent!). :bs
My best E.T during this weekend was 14.10@156 kph (96.4 mph) compared to last years 13.91@159 kph (98.2mph). The weather was almost the same as last year.
What can be wrong?
TIA
:cheers:
[Modified by Cratzy, 7:38 AM 8/18/2003]
Last year I ran 13.91 at the same track. During the winter I installed a Shift Kit from B&M and the car felt faster. During this spring I installed a pair of Flowmaster Afterburner at the rear of my dual 3” exhaust system. Before this all I had was a pair of catalytic converters and the rest was just straight pipes. The car didn’t felt any slower with the mufflers on than without (nor any more silent!). :bs
My best E.T during this weekend was 14.10@156 kph (96.4 mph) compared to last years 13.91@159 kph (98.2mph). The weather was almost the same as last year.
What can be wrong?
TIA
:cheers:
[Modified by Cratzy, 7:38 AM 8/18/2003]
Former Vendor
Joined: Jun 2001
Posts: 7,204
Likes: 6
From: St Marys PA
Re: New mods - slower car! (Cratzy)
The weather was almost the same as last year.
What can be wrong?
TIA
:cheers:
What can be wrong?
TIA
:cheers:
How are you determining the weather to be the same. Temp?? In a given day the DA can change enough to swing ETs the amount your off.
Without a weather station and a bunch of runs logged into it. Its very tough to know that the weather is not effecting your ETs and its a mechanical/tuning issue.
You have another year on your tires as well most likely or maybe even different ones. There are tons of vaiable that can skew the two times.
I think your fine and run it in the fall for your new best ET :cheers:
[Modified by ski_dwn_it, 8:42 AM 8/18/2003]
Thread Starter
Racer
Joined: Sep 2000
Posts: 337
Likes: 0
Re: New mods - slower car! (vader86)
My 60ft times are aprox. 2.2s.
Tires are the same as last year.
About the weather. Ok it is difficult to determine if it is the same as last year, but all the others ran good E.t 's.. :banghead:
Tires are the same as last year.
About the weather. Ok it is difficult to determine if it is the same as last year, but all the others ran good E.t 's.. :banghead:
Le Mans Master
Joined: Apr 2000
Posts: 6,294
Likes: 0
From: Amateur driver on open course.
Re: New mods - slower car! (ski_dwn_it)
Cratzy,
How are you determining the weather to be the same. Temp?? In a given day the DA can change enough to swing ETs the amount your off.
Without a weather station and a bunch of runs logged into it. Its very tough to know that the weather is not effecting your ETs and its a mechanical/tuning issue.
You have another year on your tires as well most likely or maybe even different ones. There are tons of vaiable that can skew the two times.
I think your fine and run it in the fall for your new best ET :cheers:
How are you determining the weather to be the same. Temp?? In a given day the DA can change enough to swing ETs the amount your off.
Without a weather station and a bunch of runs logged into it. Its very tough to know that the weather is not effecting your ETs and its a mechanical/tuning issue.
You have another year on your tires as well most likely or maybe even different ones. There are tons of vaiable that can skew the two times.
I think your fine and run it in the fall for your new best ET :cheers:
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
Re: New mods - slower car! (Cratzy)
As mentioned, normalizing track data for all weather conditions is the only way to make valid comparisons from week to week. Both Baro and RH are quite important, though I believe air pressure has a larger effect than humidity.
For example, my Vette was running mid 13s last Sat. in bad weather while it can run nearly high 12s in "ideal" weather.
For example, my Vette was running mid 13s last Sat. in bad weather while it can run nearly high 12s in "ideal" weather.
Thread Starter
Racer
Joined: Sep 2000
Posts: 337
Likes: 0
Re: New mods - slower car! (65Z01)
Thanks for all the consoling words... :cry
But I still think it might be the mufflers fault. Anyway, it is soon time to garage it for the winter here in sweden so I will have time to go through spark plugs etc. and perhaps I will run better next year again. My girlfriend is going to race it this weekend, perhaps she can do it better.
:cheers:
But I still think it might be the mufflers fault. Anyway, it is soon time to garage it for the winter here in sweden so I will have time to go through spark plugs etc. and perhaps I will run better next year again. My girlfriend is going to race it this weekend, perhaps she can do it better.
:cheers:
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