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June 13th, 2008, 08:43 AM
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what went wrong on my pass
I was making a pass and had some detnation and Looking at my powerlogger log, it looks like the O2 senser went haywire. I ended up with a broken piston. I have not torn down my motor yet. But I would like to know what caused it. Thanks for any help.
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1987 GN 3" Huston down pipe, SS exhaust,Poston headers, 208 cam, fuel pump,hot wire kit, adjustable reg.,60# injectors,power logger, scan master, TT chip, 6131 bb turbo, PTE SLIC, March pulleys, RJC power plate, 3.5" LS1 MAF Sensor, MAF TRANSLATOR, Razer alky kit, fresh trans with 9.5" TC.     
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June 13th, 2008, 09:11 AM
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I'm looking at the run traces and don't see anything unusual
 The O2 trace is flat as a billiard table. What part of the run is worrysome?
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TurboDave EWCS(SW) USN Ret Email Us Sevierville, TN TranslatorPro MAFless fuel, spark and boost management 86 GN(TranslatorPro/ExtenderPro on speed density w/boost & fuel pump control,PLX-WB) (original owner) 87 GN (second owner) 84 L69 Z28 (original owner) 01 Excursion LTD 7.3L PSD(Power Stroke Diesel), Turbo, 4X2 08 Honda Accord EX-L, 3.5V6, AT My Photo Gallery
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June 13th, 2008, 09:19 AM
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Quote:
I am looking at it now.... It doesn't appear lean at all.....the times it spiked lean... you were not on the gas at all...the majority of the time she was real rich... .900 or so... It is hard to make alot out of it because the throttle was never really matted for only a second or so for the entire run..... wierd things happen on datalogs when the throttle isn't planted....
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1987 Buick GN Currently getting freshened up.... Old Parts: 60# injectors, 3" TH DP with test pipe and hooker cat back, Walbro 340 pump, Razor's Alky, TT Chip, 3-1/2" MAF pipe with Big Mouth CA Kit and LS1 MAF, Translator.... yada yada New parts: Ported heads with stainless valves, RJC FMIC, T&D 1.65 roller rockers, Comp XR2 Hydraulic Roller 210/215@.050 .549/.549 (with 1.65 rockers), champion ported intake, Hemco stock appearing doghouse, PT70 P-trim turbo with H comp. housing, N/A109 block bored .030 over with head studs, main studs #2 and #3 billet main caps, cometics, TRW forged .030 over slugs with hastings moly rings. New times soon. (1/8) 8.002 @ 86 mph 12.650 @ 106 mph with a 1.71 60' time with the stock turbo/dutt neck intercooler (best mph was 107.69 mph)
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June 13th, 2008, 11:15 AM
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Crap I posted the wrong file. I dont have it on this computer, I will repost when I get home. Sorry.
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1987 GN 3" Huston down pipe, SS exhaust,Poston headers, 208 cam, fuel pump,hot wire kit, adjustable reg.,60# injectors,power logger, scan master, TT chip, 6131 bb turbo, PTE SLIC, March pulleys, RJC power plate, 3.5" LS1 MAF Sensor, MAF TRANSLATOR, Razer alky kit, fresh trans with 9.5" TC.
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June 13th, 2008, 11:57 AM
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Quote:
.900???? Throttle was 4.66 the whole run. You must be looking at the burnout portion. Ya need to go further into the recording.
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TurboDave EWCS(SW) USN Ret Email Us Sevierville, TN TranslatorPro MAFless fuel, spark and boost management 86 GN(TranslatorPro/ExtenderPro on speed density w/boost & fuel pump control,PLX-WB) (original owner) 87 GN (second owner) 84 L69 Z28 (original owner) 01 Excursion LTD 7.3L PSD(Power Stroke Diesel), Turbo, 4X2 08 Honda Accord EX-L, 3.5V6, AT My Photo Gallery
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June 13th, 2008, 12:26 PM
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here is the right one. Sorry
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1987 GN 3" Huston down pipe, SS exhaust,Poston headers, 208 cam, fuel pump,hot wire kit, adjustable reg.,60# injectors,power logger, scan master, TT chip, 6131 bb turbo, PTE SLIC, March pulleys, RJC power plate, 3.5" LS1 MAF Sensor, MAF TRANSLATOR, Razer alky kit, fresh trans with 9.5" TC.
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June 13th, 2008, 12:48 PM
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Did your fuel pump crap out? 5150 rpm @ 28 psi and the 02 was at .031!
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1987 Grand National 12.1 @ 108 Ferrari F430 Challenge Series Team Driver/Fabricator
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June 13th, 2008, 12:49 PM
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33 Knock counts and 7.1 degrees of retard. 15 degrees @ 1550 TPS 4.66. I'd say your fuel went somewhere.
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1987 Grand National 12.1 @ 108 Ferrari F430 Challenge Series Team Driver/Fabricator
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June 13th, 2008, 12:55 PM
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How much fuel was in the car before that run? Your 02's came back on the top side. Or the alky pump went south.
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1987 Grand National 12.1 @ 108 Ferrari F430 Challenge Series Team Driver/Fabricator
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June 13th, 2008, 01:11 PM
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Quote:
I had a half tank of freash 93 octane.
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1987 GN 3" Huston down pipe, SS exhaust,Poston headers, 208 cam, fuel pump,hot wire kit, adjustable reg.,60# injectors,power logger, scan master, TT chip, 6131 bb turbo, PTE SLIC, March pulleys, RJC power plate, 3.5" LS1 MAF Sensor, MAF TRANSLATOR, Razer alky kit, fresh trans with 9.5" TC.
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June 13th, 2008, 02:05 PM
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Dude. IMHO, alky and 93 octane are NOT going to support 29# of boost, not for long anyway.
But it does look like you maybe lost the fuel pump or something along the fuel delivery equation.
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TurboDave EWCS(SW) USN Ret Email Us Sevierville, TN TranslatorPro MAFless fuel, spark and boost management 86 GN(TranslatorPro/ExtenderPro on speed density w/boost & fuel pump control,PLX-WB) (original owner) 87 GN (second owner) 84 L69 Z28 (original owner) 01 Excursion LTD 7.3L PSD(Power Stroke Diesel), Turbo, 4X2 08 Honda Accord EX-L, 3.5V6, AT My Photo Gallery
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June 13th, 2008, 03:35 PM
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Ya it was a little higher than I wanted. I was shotting for like #26.
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1987 GN 3" Huston down pipe, SS exhaust,Poston headers, 208 cam, fuel pump,hot wire kit, adjustable reg.,60# injectors,power logger, scan master, TT chip, 6131 bb turbo, PTE SLIC, March pulleys, RJC power plate, 3.5" LS1 MAF Sensor, MAF TRANSLATOR, Razer alky kit, fresh trans with 9.5" TC.
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June 13th, 2008, 03:49 PM
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Now why is that Dave...I have run a Bunch of passes at 28 psi and a few at 30 psi with no knock on 93 and meth.
It's just like anything else if you sneak up on it there's no reason this isn't as safe as race fuel. I'm even running 26* of timing. (Disclamer: This doesn't mean anyone can turn the boost to the moon and be ok, careful tuning and a car in good condition is required)
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Collin Hundley 87 GN no times yet 86 T-type Primered with bench seat OH YEAH!!!!! 11.70@116 with a sucky 60' But the car has gone 7.03@96 in the 1/8th with a 1.47 60' - Parted out
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June 13th, 2008, 03:58 PM
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Quote:
__________________
TurboDave EWCS(SW) USN Ret Email Us Sevierville, TN TranslatorPro MAFless fuel, spark and boost management 86 GN(TranslatorPro/ExtenderPro on speed density w/boost & fuel pump control,PLX-WB) (original owner) 87 GN (second owner) 84 L69 Z28 (original owner) 01 Excursion LTD 7.3L PSD(Power Stroke Diesel), Turbo, 4X2 08 Honda Accord EX-L, 3.5V6, AT My Photo Gallery
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June 13th, 2008, 04:07 PM
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Quote:
On the correct datalog.... during the run.... the pulsewidth was 16.x mS.... this is similar to the incorrect file he first posted.... O2's on the incorrect file were in the upper 700's alot... for about 27 psi boost.... The newer correct file.... the 02's bottomed out near 0. I concurr that the fuel pressure must have gone completely away.... cause it shouldn't have gone that lean... with similar pulsewidths... IMHO... Your fuel pump is likely the direct cause of this failure..... however.... I assume you had no audible knock detector... or you might could have heard this... and got out before she cooked... Good luck tearing into it... and getting back on the road...
__________________
1987 Buick GN Currently getting freshened up.... Old Parts: 60# injectors, 3" TH DP with test pipe and hooker cat back, Walbro 340 pump, Razor's Alky, TT Chip, 3-1/2" MAF pipe with Big Mouth CA Kit and LS1 MAF, Translator.... yada yada New parts: Ported heads with stainless valves, RJC FMIC, T&D 1.65 roller rockers, Comp XR2 Hydraulic Roller 210/215@.050 .549/.549 (with 1.65 rockers), champion ported intake, Hemco stock appearing doghouse, PT70 P-trim turbo with H comp. housing, N/A109 block bored .030 over with head studs, main studs #2 and #3 billet main caps, cometics, TRW forged .030 over slugs with hastings moly rings. New times soon. (1/8) 8.002 @ 86 mph 12.650 @ 106 mph with a 1.71 60' time with the stock turbo/dutt neck intercooler (best mph was 107.69 mph)
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June 13th, 2008, 04:09 PM
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In my opinion, 25 psi+ should be done on race gas and a supplement such as meth.
You will find more than not when bad things happen the finger gets pointed at fuel issues.
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1987 Grand National 12.1 @ 108 Ferrari F430 Challenge Series Team Driver/Fabricator
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June 13th, 2008, 04:12 PM
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Quote:
"I felt the car start to slow down" - right about that point, is a good time to lift for future reference. Obviously if the tires break loose you will know that, but for any other undetermined reason....lift.
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1987 Grand National 12.1 @ 108 Ferrari F430 Challenge Series Team Driver/Fabricator
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June 13th, 2008, 07:05 PM
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I will agree with not being regular fair because I don't think most will take the time to tune it that much.
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Collin Hundley 87 GN no times yet 86 T-type Primered with bench seat OH YEAH!!!!! 11.70@116 with a sucky 60' But the car has gone 7.03@96 in the 1/8th with a 1.47 60' - Parted out
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June 14th, 2008, 10:30 AM
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Quote:
Ya I should have. happaned about the time I flipped the switch to lock the converter and I had never done that before and I thought tha |
