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  #1 (permalink)  
Old May 23rd, 2005, 10:43 AM
2QUIK6's Avatar
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Is GN and TTA O2 sensor the same?
GN uses Delco AFS-20 O2 sensor, is this the same as the TTA sensor?

My TTA would not pass emissions today I think it was from running a little bit of leadded race gas in it a few months ago testing a turbofor Harry.....
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'87 Grand National Owned 17 years. 65#inj,HW 307, THDP,V4 IC, GT6131E, alky, no cat, Cold Air kit, Del-alum fronts, Gen2 T+ w/LS1 & LM1/LMA3 WBO2, JJ TB mod, 3000 PTS 9x11conv, Direct Scan, best 1/8th 7.23@96, best 1/4 11.61@119, 1.66 60'
'79 10th Anniv. T/A 6.6 all original 4-spd
'89 20th Anniv. TTA #426 stock, 15k miles.
'99 30th Anniv TA #707 Conv 1 of 535 conv..rarer than a GNX.
'95 Trans Am Conv LT1 w/LPE 211/219, LE2 ported heads/intake, and LTs/true duals
'94 Silverado LT4 w/LPE 211/219.
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Old May 23rd, 2005, 02:34 PM
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I used one of my old GN 02s on my TTA. It worked fine. It was a Bosch though.

What kind of turbo did you test?
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87 GN T63E, PTE FM, MSD 50's, Atr DP w/ext gate, ATR 2 1/2 duals, 5 disc Vigilante Jimmys trans HR sway bar 10.87@125.01 1.52 60' on Alkycontrol and TT Speed density chip

TTA#259 GT3255e, 50lb inj, RJC boost controller, THDP,MT DRs. 11.53@119.2. 1.64 60' Best MPH 121.04 Alky control TT SD chip. PLX SM-AFR WB, Power Logger,Jimmy's trans. 3200 Vigilante 5 disc LU
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Old May 23rd, 2005, 07:07 PM
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get a denso and you will not have to worry about race gas. Either way, it is a good all around 02 sensor.

Bo
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Old May 23rd, 2005, 08:20 PM
2QUIK6's Avatar
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Quote:
Originally posted by Sweet6
I used one of my old GN 02s on my TTA. It worked fine. It was a Bosch though.

What kind of turbo did you test?
I slapped on a TE6031E and a GT3251 to see how they would spool with the stock convertor. The 3251 was extremely fast. All GT32s sold so far are of the 3255 variety, this ine is slightly smaller and would run .2 faster in the 8th than stock, it was meant to be a stock replacement.
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'87 Grand National Owned 17 years. 65#inj,HW 307, THDP,V4 IC, GT6131E, alky, no cat, Cold Air kit, Del-alum fronts, Gen2 T+ w/LS1 & LM1/LMA3 WBO2, JJ TB mod, 3000 PTS 9x11conv, Direct Scan, best 1/8th 7.23@96, best 1/4 11.61@119, 1.66 60'
'79 10th Anniv. T/A 6.6 all original 4-spd
'89 20th Anniv. TTA #426 stock, 15k miles.
'99 30th Anniv TA #707 Conv 1 of 535 conv..rarer than a GNX.
'95 Trans Am Conv LT1 w/LPE 211/219, LE2 ported heads/intake, and LTs/true duals
'94 Silverado LT4 w/LPE 211/219.
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Old May 23rd, 2005, 09:41 PM
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I have a GT3255 waiting to go on. Have you tested one of those? If so, how did you like it?

TIA
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87 GN T63E, PTE FM, MSD 50's, Atr DP w/ext gate, ATR 2 1/2 duals, 5 disc Vigilante Jimmys trans HR sway bar 10.87@125.01 1.52 60' on Alkycontrol and TT Speed density chip

TTA#259 GT3255e, 50lb inj, RJC boost controller, THDP,MT DRs. 11.53@119.2. 1.64 60' Best MPH 121.04 Alky control TT SD chip. PLX SM-AFR WB, Power Logger,Jimmy's trans. 3200 Vigilante 5 disc LU
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Old May 24th, 2005, 04:56 AM
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o2 sensors
Hi,
The Delco AFS22 is what was used on the GNX, supposed to have a quicker cycling and response time for more accurate A/F ratio. It is readily available and within a few bucks of the price for the AFS20. I don't know if the TTAs used this stock, but it would be a good replacement. Of course, all ND stuff is pretty high quality, never saw a comparison. Go heated if you want real accuracy, but can the stock old ECM really use it? I wonder...
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Old May 24th, 2005, 06:49 AM
Buick "RICER"
  
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I tried a GNX one on my stocker ... Didn't work for crap ... pig rich !! I allways used the stock GM one but this was just a high 11 car
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86/87 GN and 89 TTA .. tons of parts !! Time to get out! Stuff has to go !!! Otherwise I am cutting it up and throwing it away email ttastage2@yahoo.com
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Old May 24th, 2005, 11:54 AM
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Quote:
Originally posted by Sweet6
I have a GT3255 waiting to go on. Have you tested one of those? If so, how did you like it?

TIA
Nope, haven't tried one of those, but know 2 people in the local club with them and they really like them. I was only trying out odd ball wheel combinations.

As far as the O2 goes, I slapped in a new AFS20 I had lying around that I bought for the GN and never used as I switch to a heated O2 on it......guess I'll find out Saturday if it will pass now.....funny thing is the BLMs on DS are pretty much around 128 so I'm not certain thats it or the O2 was just giving false readings to the ECM and it thought the BLMs should be around 128....
Haven't driven it yet to see if the BLMs are different know with the new O2....

If that doesn't work I'll just set the BLM range to be no higher than 124 so its cutting fuel everywhere and take it back again to test
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'87 Grand National Owned 17 years. 65#inj,HW 307, THDP,V4 IC, GT6131E, alky, no cat, Cold Air kit, Del-alum fronts, Gen2 T+ w/LS1 & LM1/LMA3 WBO2, JJ TB mod, 3000 PTS 9x11conv, Direct Scan, best 1/8th 7.23@96, best 1/4 11.61@119, 1.66 60'
'79 10th Anniv. T/A 6.6 all original 4-spd
'89 20th Anniv. TTA #426 stock, 15k miles.
'99 30th Anniv TA #707 Conv 1 of 535 conv..rarer than a GNX.
'95 Trans Am Conv LT1 w/LPE 211/219, LE2 ported heads/intake, and LTs/true duals
'94 Silverado LT4 w/LPE 211/219.
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