Off to .........
Thread Starter
Former Vendor
Joined: Jun 2001
Posts: 7,204
Likes: 6
From: St Marys PA
The Results...........
pound the car tonight at Beaver Springs Dragway and tomorrow at local airport strip!
Well guys this is the maiden voyage of the new TC and A/F leaned out from pig rich ~10.1. Now at ~12.6-12.8
I hope she has what it takes to get into the 12s tonight!
Wish me luck!
[Modified by ski_dwn_it, 2:48 PM 5/24/2002]
[Modified by ski_dwn_it, 8:16 PM 5/25/2002]
Well guys this is the maiden voyage of the new TC and A/F leaned out from pig rich ~10.1. Now at ~12.6-12.8
I hope she has what it takes to get into the 12s tonight!
Wish me luck!
[Modified by ski_dwn_it, 2:48 PM 5/24/2002]
[Modified by ski_dwn_it, 8:16 PM 5/25/2002]
Team Owner
Joined: Nov 1999
Posts: 32,782
Likes: 11
From: Former NCM Drag Racing coordinator, National director Corvette Challenge Spring Hill, Tennessee: Whiting, New Jersey
Cruise-In VI Veteran
Cruise-In VII Veteran
Re: Off to ......... (ski_dwn_it)
Good luck.
Thread Starter
Former Vendor
Joined: Jun 2001
Posts: 7,204
Likes: 6
From: St Marys PA
Re: Off to ......... (mackeyred96)
Well Fellas here is the scoop.....
The weather was less than co-operative, but I did get to run three times. On the way down to the track ~2hr drive about 1 1/2hr into the drive my SYS engine light same on! :eek:
I stopped the car and checked the obvious fluids etc and then started the car with the laptop connected and watched to something strange...I think it was the heated O2 sensor. Because I noticed on my WBO2 that the A/F at cruise, which is usually 14.6-14.8, was now at 12.5. Without being able to view the underside of the car its tough to say. I should also add that the SYS light went off while the laptop was connected that is why the O2 looked alright. Shortly further down the road the SYS light came back on and the A/F went crazy again. :cry
Went to the track and said hell with it, I am running regardless.
One other thing it could be is the MAF sensor. I gutted it the night before :confused: But the g/sec was functioning just as it should have been. I spoke with another corvette owner there that was running 11.4sec on juice and 12.4 n/a with nearly the same combo + 383c.i. He said that he had experienced the same problem after gutting due to the MAF seeing unrealistic air flows???? Any truth to that?
Well enough of the tech crap lets get to the racing.....
Traction was tough to get in first and some spin in second. Here are the results.
I should also add the guy that had the vette said this track is VERY slow. He runs .2-.3sec quicker at every other track he runs at. And about 1 MPH fast too.
Here are the results:
RUN1
R/T .672
60' 1.967
330 5.621
1/8 8.646
MPH 82.44
1000 11.293
1/4 13.507
MPH 101.84
I was pretty disappointed at the results although the ET were a bit quicker...
I took it out again for another try........
RUN2
R/T .674
60' 1.974
330 5.571
1/8 8.554
MPH 82.37
1000 11.154
1/4 13.336
MPH 103.91
I was a bit more please at least the MPH were back.....but still no 12's
:mad
I spoke with the vette guy and he said that perhaps your running too much timing. I replied that I have the chip programmed to 25.3* at high load and 3000+ RPM He said he was running the stock chip! That has nearly 36-38*. I tried running that and my knock counts were ridiculous. I got kinda mad walking over to the car and I remembered I had my distributer wrench with me. So I told dad I was going to retard the timing some. I loosened the cap and rotated it back ~.5 in. Not knowing how much, noone nearby had a light. Out to the track I went....
RUN3
R/T .891 :(
60' 1.940
330 5.505
1/8 8.463
MPH 82.97
1000 11.042
1/4 13.204
MPH 104.55
Man did that one feel stronger too. I wish I would have had slicks on, I bet it would have been a high 12's. Seems that I must be running too much timing????? I guess I need to stop thinking about it and just give the car what it wants.
Today are the local drags and although its not an ideal track (its an airport) I will get to run many times and prehaps I can find the sweet spot for my timing. Then adjust the chip to represent the change.
Any ideas why I would need to retard the timing sooo much? Everyone says that the AFR heads do not need very much timing??? Who knows.
Overall I am please not so much at the runs, but rather that the timing change made a pretty good improvement. That tells me that its me/tuning and not something mechanical. Also one other thought is that the balancer's outer piece had moved and 6* is really not 6*. That is why I had to retard the timing sooooo much.
Today I am going to retard it more and see what happens.
Hopefully the rain hold out.
All in all, I think with some slicks, skinnies on the front, and alittle more tuning I should be consistanly running in the 12's.
Give me your thoughts. For now I must take the car out to the dealership and poke around for the SYS cause.
Thanks guys!
:cheers:
The weather was less than co-operative, but I did get to run three times. On the way down to the track ~2hr drive about 1 1/2hr into the drive my SYS engine light same on! :eek:
I stopped the car and checked the obvious fluids etc and then started the car with the laptop connected and watched to something strange...I think it was the heated O2 sensor. Because I noticed on my WBO2 that the A/F at cruise, which is usually 14.6-14.8, was now at 12.5. Without being able to view the underside of the car its tough to say. I should also add that the SYS light went off while the laptop was connected that is why the O2 looked alright. Shortly further down the road the SYS light came back on and the A/F went crazy again. :cry
Went to the track and said hell with it, I am running regardless.
One other thing it could be is the MAF sensor. I gutted it the night before :confused: But the g/sec was functioning just as it should have been. I spoke with another corvette owner there that was running 11.4sec on juice and 12.4 n/a with nearly the same combo + 383c.i. He said that he had experienced the same problem after gutting due to the MAF seeing unrealistic air flows???? Any truth to that?
Well enough of the tech crap lets get to the racing.....
Traction was tough to get in first and some spin in second. Here are the results.
I should also add the guy that had the vette said this track is VERY slow. He runs .2-.3sec quicker at every other track he runs at. And about 1 MPH fast too.
Here are the results:
RUN1
R/T .672
60' 1.967
330 5.621
1/8 8.646
MPH 82.44
1000 11.293
1/4 13.507
MPH 101.84
I was pretty disappointed at the results although the ET were a bit quicker...
I took it out again for another try........
RUN2
R/T .674
60' 1.974
330 5.571
1/8 8.554
MPH 82.37
1000 11.154
1/4 13.336
MPH 103.91
I was a bit more please at least the MPH were back.....but still no 12's
:mad
I spoke with the vette guy and he said that perhaps your running too much timing. I replied that I have the chip programmed to 25.3* at high load and 3000+ RPM He said he was running the stock chip! That has nearly 36-38*. I tried running that and my knock counts were ridiculous. I got kinda mad walking over to the car and I remembered I had my distributer wrench with me. So I told dad I was going to retard the timing some. I loosened the cap and rotated it back ~.5 in. Not knowing how much, noone nearby had a light. Out to the track I went....
RUN3
R/T .891 :(
60' 1.940
330 5.505
1/8 8.463
MPH 82.97
1000 11.042
1/4 13.204
MPH 104.55
Man did that one feel stronger too. I wish I would have had slicks on, I bet it would have been a high 12's. Seems that I must be running too much timing????? I guess I need to stop thinking about it and just give the car what it wants.
Today are the local drags and although its not an ideal track (its an airport) I will get to run many times and prehaps I can find the sweet spot for my timing. Then adjust the chip to represent the change.
Any ideas why I would need to retard the timing sooo much? Everyone says that the AFR heads do not need very much timing??? Who knows.
Overall I am please not so much at the runs, but rather that the timing change made a pretty good improvement. That tells me that its me/tuning and not something mechanical. Also one other thought is that the balancer's outer piece had moved and 6* is really not 6*. That is why I had to retard the timing sooooo much.
Today I am going to retard it more and see what happens.
Hopefully the rain hold out.
All in all, I think with some slicks, skinnies on the front, and alittle more tuning I should be consistanly running in the 12's.
Give me your thoughts. For now I must take the car out to the dealership and poke around for the SYS cause.
Thanks guys!
:cheers:
