Zilla's rebuild (exhaust mod revealed, gauges going in.....) - Page 50 - 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 04-29-2007, 10:12 AM   #491
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One problem I discovered with them last night. To enter program mode on the cyberdyne gauges, you have to follow this sequence perfectly:

1. Turn headlights on (it has a sensor wire to dim when HL'* come on).
2. Turn ignition on.
3. Adjust lo and hi setpoints.
4. Turn HL'* off.

Now can you see a problem? Rather than clutter this topic, if you think you see it here, PM me, and I'll quote the winning PM here.

Edit:

Travis gave up, but got close. Think about how night and day on a Bonneville may be different with regards to the sequence above.
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Old 04-29-2007, 12:55 PM   #492
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That pillar pod looks great! The texture came out looking totally factory.
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Old 06-26-2007, 12:20 AM   #493
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Ressurecting this slightly dusty post with a follow-up.

The cost of performance is steep. And the farther you go, the more difficult it can get. My car is now very temperature and octane sensitive. Not quite what I would have expected considering the work I did in the last 25 pages of this topic.

I've had to go back to last year'* heavily-drilled thermostat (on the left in this pic, the one on the right came out tonight). This is an INTENSE 160. Keep in mind I have a 10% underdrive water pump pulley and a brand new water pump:


I have to keep this sucker cool to stay in the power. The good news is my radiator core looks brand new, in spite of 125,000 miles:




I can tell you that with either a cold or cool engine (below 160 degrees on the gauge) or 96 or higher octane, this car has MAD power. With both higher octane and cool temps, it'* even more thrilling.

I'll also be changing fuel injectors soon........


In a nutshell, the 93 is noticably quicker than the 95 when cold. Even more so with higher octane (both cars on 2.5 pulleys, SLE running the Zilla'* top end from last year). But once the Zilla heatsoaks, the two cars are neck and neck. This is the price of performance for me. Was it worth it? Sure. I went places I never thought the Zilla would go. And the SLE is benefiting from the work now as well.
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Old 06-26-2007, 01:29 AM   #494
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I wonder why heat makes such a difference....?
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Old 06-26-2007, 01:55 AM   #495
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Needing 96 octane to keep all the power? Sounds like something is being pushed too hard, or some kr is creeping in because of something..
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Old 06-26-2007, 08:16 AM   #496
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Remember what I said about the injectors.

But I can't put in my wideband to nail it down until all this leaded fuel is out of my tank.

Not my fault. But I'm not risking an expensive sensor until I know it'* all burnt off.
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Old 06-26-2007, 09:30 AM   #497
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Not to off topic you...

These copperish fins we see here are the radiator cooler in the endcap. Great picture.


I am also considering going back to a tstat with drilled hole.
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Old 06-26-2007, 09:40 AM   #498
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Maybe it'* time to back the ignition timing down.
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Old 06-26-2007, 09:58 AM   #499
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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?
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Old 06-26-2007, 10:03 AM   #500
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i missed what the exhaust mod on the Zilla was...
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