Zilla's rebuild (exhaust mod revealed, gauges going in.....) - Page 51 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

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Old 06-26-2007, 11:11 AM   #501
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Quote:
Originally Posted by 95naSTA
Maybe it'* time to back the ignition timing down.
My ignition timing is backed down right now. Until the fueling is straightened out. I'm retarded 6 for safety.

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I was under the impression that leaded fuel kills both O2 sensors and cat converters...not wishing to sound like a smartmule, but is that thinking wrong?
O2 sensors can be a bit sensitive. I'm planning on replacing it, even though it only has 500 miles on it. Fuel went in Sunday, and only 2 gallons, but it'* just not worth the doubt or possible trouble. I'm not worried about the Cat. It takes more lead than that to take one out, and the cat only has 300 miles on it.

Quote:
i missed what the exhaust mod on the Zilla was
QTP 2.5" electric exhaust cutout between the downpipe and cat. With a programmable controller. Go back to page 22 of this topic.

I just shot a vid or 3 on the way to work, and compared them to the vids from last week in the SLE.

Observations:
1. The SLE is quicker than the Zilla was last year, but it is running the Zilla'* LIM and supercharger from last year, as well as having different programming/shift points etc from the factory.

2. The SSEi is quicker 0-60 than the SLE by about a second (with wheelspin).

3. The SLE is quicker from 20-80 than the SSEi by about a second, but the SSEi had a little wheelspin from 20-25.

Once I get the last few issues straightened out, mostly the fueling, the 93 will be the quicker of the two, but I'm still unsure of what pulleys will run this year. I'm thinking for starters, the SLE may benefit from a 2.2", but then again, so might the SSEi. I may need to get another pulley. Or maybe a 2.3" instead.
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Old 06-26-2007, 11:17 AM   #502
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Quote:
Originally Posted by willwren
I'm retarded for safety.
Really?

Overall, your work on Greenzilla has been very impressive. I'm amazed at what the S1 can do if certain parts are massaged and tweaked.

I bet you have to be proud of yourself at the moment?
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Old 06-26-2007, 11:25 AM   #503
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Proud, no. Too much going on with both cars to get to that point.

Surprised at how the 95 responded to somewhat simple mods. It'* a screamer now. With nothing but the Zilla'* old CAI, LIM, M62, high flow cat, and 2.5" pulley. All these parts are hand-me-downs. Granted stock for stock the 95 was quicker to begin with, and it seemed to respond an equal percentage of that with the top end swap.

Keep in mind I had to massage and tweak the Zilla a bit to get it to the 94/95 baseline to begin with, which posed it'* own problems as well. Making a 91-93 L67 truly quick is not an easy trick.

Having both cars to test with is a big advantage though, and there'* still lots more to learn.
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Old 06-26-2007, 11:31 AM   #504
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Certainly the 93 has to be plenty faster than stock before you started? If that is the case then I would be proud of myself.
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Old 06-26-2007, 02:38 PM   #505
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Quote:
Originally Posted by sandrock
Quote:
Originally Posted by willwren
But I can't put in my wideband to nail it down until all this leaded fuel is out of my tank.
I was under the impression that leaded fuel kills both O2 sensors and cat converters...not wishing to sound like a smartmule, but is that thinking wrong?
Yes it does both...

He will get a New sensor... The cat should live a while longer... Just gotta run all of that stuff out of the tank..

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Old 06-26-2007, 08:57 PM   #506
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The car is happier today, in spite of the higher temps. Yesterday'* block/radiator flush and cooler thermostat (both were 160'* but now drilled heavier with last year'* stat) helped a ton. My coolant/water ratio is less than 1:4 right now as well.

Still working on getting that damn leaded gas out of there. Car is getting too good of mileage, even in town. It might be next week before I get the wideband O2 in there.
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Old 06-26-2007, 11:32 PM   #507
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Why were you using leaded fuel?
The race fuel we used last year was unleaded.

So if we pull the O2 for racing, will the PCM go into rich warm up mode.....does is matter for racing at WOT?

I will have to pull both my O2'* if I want to run with the Nitro.
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Old 06-26-2007, 11:34 PM   #508
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Quote:
Originally Posted by willwren
The car is happier today, in spite of the higher temps. Yesterday'* block/radiator flush and cooler thermostat (both were 160'* but now drilled heavier with last year'* stat) helped a ton. My coolant/water ratio is less than 1:4 right now as well.

Still working on getting that damn leaded gas out of there. Car is getting too good of mileage, even in town. It might be next week before I get the wideband O2 in there.
ever thought of running a gen 5 m90 with the m62 nosedrive? intercooler?
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Old 06-26-2007, 11:40 PM   #509
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Quote:
Originally Posted by 91buickman
ever thought of running a gen 5 m90 with the m62 nosedrive? intercooler?
Nothing about that would line up, i cant see it being even remotly possible
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Old 06-26-2007, 11:43 PM   #510
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Quote:
Originally Posted by 91buickman
ever thought of running a gen 5 m90 with the m62 nosedrive? intercooler?
ANY M90 wont fit on the S1 LIM. it''* longer..
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