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#1 |
![]() Join Date: Mar 2007
Location: Crystal Lake, IL
Posts: 7,194
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Ran up to GLD:
First run hit the rev limiter: 12.55 @ 117.55: 1/8 mile 8.23 Second run did a burnout through 1st. gear, 2.4 60ft and ran 13.57 @ 116.26 Third run spun the wheels but hit 12.68 @ 117.43 1/8 mile 8.36 @ 89.81. My last two runs saw a significant drop in MPH 12.7 @ 113.6 and then last run was a 114.3 at 12.8. Not sure what happened. Even in the 113.6 I ran a 8.33 1/8 mile. The car seemed to lose the back end power. The only thing I did was pull the chip and tried to put a moates adapter on it to run another program. I could not get it to work, so I put the stocker back in....no SES lights. Ran on Sumitumos, they were not bad, I could launch at about 1800 without spinning them. Put my time in the DA calculator, I think its wishfull thinking, but here is what it spit out: Stock and Mildly Modified Naturally Aspirated Engines 12.368 @ 119.442 MPH Extensively Modified Naturally Aspirated Engines 12.465 @ 118.644 MPH
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LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359 Last edited by LGAFF; 09-07-2009 at 04:36 PM. |
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#2 |
Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,696
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Let me suggest that you "drain" the ECM when swapping proms. Perhaps the SES light caused the ECM to throttle back even tho you replaced with original chip.
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#3 |
![]() Join Date: Jul 2007
Location: Bartlett, IL
Posts: 7,153
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I assume the 1992?
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1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Custom Interior NCM Lifetime Member #978 |
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#4 |
![]() Join Date: Mar 2007
Location: Crystal Lake, IL
Posts: 7,194
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Yup the 92.
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LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359 |
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#5 |
Join Date: Sep 2006
Location: lone pine and mammoth lakes
Posts: 1,407
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nice runs ,especially with street tires
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#6 |
![]() Join Date: Jun 2006
Location: Sparks, NV
Posts: 2,852
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Largely due to operator error, best I could muster today was 114.21mph @ 13.235.
I simply could not launch the car properly. Either spinning the tires badly or (mostly) bogging on takeoff. My best 60' time was a poor 2.304 on that same run. Here's what the DA Calculator told me... Stock and Mildly Modified Naturally Aspirated Engines 13.015 @ 116.182 MPH I was running my Haibeck chip and forgot to bring the Cory Henderson chip with me. I suspect the Henderson chip would have been better as it takes out less timing. Looks like I need launch lessons, any volunteers? H ![]()
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90'ZR-1 #1461 Red/Black Ported Intake, Degreed Cams, OBX Headers & Exhaust, Fidanza FW, Secondary Delete, Custom tune, C6 GS Wheels. Sold 08 C6 Z51 Crystal Red Metallic Sold Vararam Intake, Tune, Sold 05 C6 Z51 Red/Black Sold 90'ZR-1 #1723 Black/Gray Sold but not forgotten 91' Z51 L98 White Vert. My First, you always remember your first. Sold. Last edited by Ccmano; 09-07-2009 at 07:54 PM. |
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#7 |
![]() Join Date: Mar 2007
Location: Crystal Lake, IL
Posts: 7,194
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Hans,
I think you are running too rich. I ran a near stock 90 to 12.88 at 112.68, that car even has the same tires as yours. I think I could only muster a 113... in yours with a ported intake and headers. Something is off on the low end, and you are picking up big MPH after the 1/8th. I think your speed at the 8th mile is only about 83MPH. I recently put a Haibeck chip in my 90 that was intended for a ported car. After driving it for awhile, I thought I had a miss or bad coil. Once I went back to the DRM chip this afternoon, no issues. I think maybe you should try a milder chip and see if that resolves some of the issues. Obviously data logging would be the best thing to do.
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LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359 |
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#8 |
![]() Join Date: Jun 2006
Location: Sparks, NV
Posts: 2,852
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My 1/8th mile mph was 84.7, still crappy. We'll see how the Henderson chip does.
H ![]()
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90'ZR-1 #1461 Red/Black Ported Intake, Degreed Cams, OBX Headers & Exhaust, Fidanza FW, Secondary Delete, Custom tune, C6 GS Wheels. Sold 08 C6 Z51 Crystal Red Metallic Sold Vararam Intake, Tune, Sold 05 C6 Z51 Red/Black Sold 90'ZR-1 #1723 Black/Gray Sold but not forgotten 91' Z51 L98 White Vert. My First, you always remember your first. Sold. |
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#9 |
Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,696
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#10 |
Join Date: Aug 2005
Location: Scottsdale, AZ
Posts: 2,450
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Ah, Yes, Late 60's
Union Grove, Close to the border, I remember We wre running a 67 GTO, low 11's |
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